- test-drb@ccmp.vtda.org - classiccmp.org

by earl_evans＠yahoo.com

Hey Cameron, I'd be one of your first customers if you did :-) Just read a little about this device in the book "Fire In The Valley". (Book review coming...) Sounds like it was kind of groundbreaking, being among the first kits to provide a keypad for input, as opposed to toggle switches, etc. They have one on display at Powell's Technical Bookstore in Portland, OR. Wish I had one that I could light up. Maybe someday... EE --- Cameron Kaiser <ckaiser(a)oa.ptloma.edu> wrote: [snip] (Earl, I'll > gladly start a KIM-1 page on retrobits. :-) ===== Earl Evans retro(a)retrobits.com Enjoy Retrocomputing Today! Join us at http://www.retrobits.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

2
1
0 0

TU58 Peripheral Emulation

by mew_jac＠swbell.net

I believe Tim Shoppa has a TU58 emulator product. Maybe Tim can tell us the state and cost of the product? I also have some code gathered up over the last few years for DOS and Linux. If anyone is interested I can dig it out... Regards, At 11:19 PM 3/25/00 -0700, you wrote: > >The main problem with the version on dBit's ftp site is it assumes >VAX byte order. The command packets are loaded byte for byte into >the data structure which messes up all the shorts. The same problem >exists for the response packets. > >clint > > >On Fri, 24 Mar 2000, Allison J Parent wrote: > >> >> <I've already asked John Wilson this, but has anyone compiled the one >> <available on dBit's ftp site for Linux? Or know of another one for >> <Linux/Windows that's available online? I'd like to try it out... >> >> I've looked at it and it's a bit old but should work. All a tu58 is >> if you ignor the tape drive itself is a 256k block addressable memeory at >> the end of a serial line talking a packet protocal. It only took 2048 >> bytes (with selftest and autoboot) of 8085 code to do it so it's not >> rocket science. >> >> Now to do that on a PC or whatever running most any OS is to beable to >> create a datafile of 256k and address any 512bytes block within it. So if >> you look at that code most of the work is working aound the OS! >> >> Allison >> >> >> >> > >

26 years, 3 months

1
0
0 0

laptop failure modes

by red＠bears.org

I have a laptop given to me by a former co-worker who claimed it was broken. It doesn't fall into the ten-year category, but I've heard people complaining of failures just like this one in many other laptops. The laptop won't run if the battery is in the unit. AC or DC. If the battery is pulled, it will run on the AC adapter just fine. The battery itself seems fine as does the charging circuit. I can discharge the battery, insert it into the machine and have it be charged later (according to the charge indicator on the battery; I haven't checked it out with a DMM or anything). What is likely to cause this sort of fault? ok r.

26 years, 3 months

1
0
0 0

Slightly OT: Need IBM Penpoint install disks for ThinkPad 730t

by nerdware＠laidbak.com

Yes, I know it's not that old, but if anyone would have a copy of an oddball OS, it'd be you guys..... I have a couple of 730t's that work, complete with the cute little PCMCIA hard drives, and the suitcase docking station with the Kodak Diconix printer. Only problem is, the OS is password locked and there seems to be no way around it. A friend has one drive with a clean, unlocked OS, but there is something about the little drives that Ghost just doesn't like. The tech at IBM was clueless, so I need the original install disks so I can wipe my machine back into usefulness. Anyone able to help? Thanks. Paul Braun NerdWare -- The History of the PC and the Nerds who brought it to you. nerdware(a)laidbak.com www.laidbak.com/nerdware

26 years, 3 months

2
1
0 0

TU58 Peripheral Emulation

by allisonp＠world.std.com

<I've already asked John Wilson this, but has anyone compiled the one <available on dBit's ftp site for Linux? Or know of another one for <Linux/Windows that's available online? I'd like to try it out... I've looked at it and it's a bit old but should work. All a tu58 is if you ignor the tape drive itself is a 256k block addressable memeory at the end of a serial line talking a packet protocal. It only took 2048 bytes (with selftest and autoboot) of 8085 code to do it so it's not rocket science. Now to do that on a PC or whatever running most any OS is to beable to create a datafile of 256k and address any 512bytes block within it. So if you look at that code most of the work is working aound the OS! Allison

26 years, 3 months

2
1
0 0

Parallel port hard drives?

by paulrsm＠ameritech.net

> Does anyone know of any parallel port hard drives that will work with with > my Sharp PC-7000? I only ask because, for some odd reason, whenever I copy a > DOS program to a floppy (360K) in Windows, it does not want to work on the > Sharp, but works flawlessly on the Windows box (in a DOS window, of > course!). What could be happening? Is there something obvious that I'm not > doing right? Are you using a 1.2MB floppy drive to write a 360K floppy disk?

26 years, 3 months

1
0
0 0

Drives on PDP-11

by allisonp＠world.std.com

<I have a full backup of the drive via COPY. I would like to graft a <different hard disk onto this machine. If the second slot is clear you can run two hard disks. that means pulling the floppy to do it. You don't however wire it like a PC. <How do connect the second drive? There are connections for a second <drive but both are on the machine and not with the 34 pin connector <daisy-chained to the first drive as is normal. Do I terminate each drive <in this "Y" configuration? What drive number should it be? Drive 4 I <suspect as the first and only hard disk is set at 3 and is terminated. No. You use two 34s and two 22s you will see drive o and drive 1 on the plate behind the HD/floppies. RT11 has a logical drive limit of 32mb so a good drive is the RD52 (quantum D540) as it's both 31mb and of all the MFM drives I've used it's rugged and reliable. The largest drivew the RQDX3 can handle is 16hx17sectors by some 2048 cylinders (~500mb) but the largest ever used by DEC was the RD54 (159mb, Maxtor 2190). <How would I configure drive geometry to match the drive I am installing? If the drive is formatted DEC compatable (PC cant!) the controller is smart enough to figure it out. If the drive is formattet non-dec you need the PDP-11 formatter to do it or a microvax2000 (has a formatter in rom). <The object of installing a second hard disk is to create a bootable clone <of the first one. A bump in disk space is allways cool but I want a <bootable clone as a backup at least. You can backup to floppies. RX50 is ~400kb a disk. <Does the ST506-type controller have enough Shugart SA400 about it that it The controller is not a the PC style of st506(which is a drive interface standard). The RQDX controller is extremely smart and has it's own PDP-11 in the form of the T-11 chip. The controller take the MSCP protocal and does a lot of work to translate that high level protocal to actual drive activity. I does so basic caching and queueing as well and uses DMA to get and put command and data. Nothing like that in your average PC that used similar MFM drives. <is running the floppies as drive id's 1 and 2? It would explain a lot. Sa400, never much too small. If it is RQDX3 (dual width board) then you can use or or two of the TEAC FD55GFV to get both RX50 (400kb) and RX33 1.2mb formats. <How difficult is it to substitute a standard double-sided floppy mech for <the wierd but nifty-looking floppy drives that are in it now? For those <of you still wondering, it has an RX50-AA double-drive unit that cannot be <formatted by the computer but can be read. Correct, formatting is not permitted by the controller due to software and the DEC RX50 drives were junk. You can format disks on PCs... PUTR can but you much have dual mode 1.2mb drive like the teac mentiond. <Will I be able to format media on the machine if I DO replace the drives? No. Yo need the diagnostic to drive the controller. <Can I substitute a standared 40trk X DS X DD mechanism or an 1.2mb 5.25" NO. Both the RX50 and the FD55gfv are 96tpi. <mech to accomplish this? The connections look standard though I have not <opened the base enclosure for the floppy mechanism for a look at it's <cabling yet. The cabling and interface will run standard 5.25 96tpi drives. Bet you got more than you wanted. But all of the burried majik is why in 1987 11/23 (or 11/73) could support a raft of users with a cpu that some considered a wimp compared to the mighty 386/16(which still cant) Allison

26 years, 3 months

1
0
0 0

Parallel port hard drives?

by netsurfer_x1＠hotmail.com

Does anyone know of any parallel port hard drives that will work with with my Sharp PC-7000? I only ask because, for some odd reason, whenever I copy a DOS program to a floppy (360K) in Windows, it does not want to work on the Sharp, but works flawlessly on the Windows box (in a DOS window, of course!). What could be happening? Is there something obvious that I'm not doing right? ____________________________________________________________ David Vohs, Digital Archaeologist & Computer Historian. Computer Collection: "Triumph": Commodore 64C, 1802, 1541, FSD-1, GeoRAM 512, Okimate 20. "Leela": Macintosh 128 (Plus upgrade), Nova SCSI HDD, Imagewriter II. "Delorean": TI-99/4A. "Monolith": Apple Macintosh Portable. "Spectrum": Tandy Color Computer 3. "Boombox": Sharp PC-7000. ____________________________________________________________ ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

26 years, 3 months

6
7
0 0

Drives on PDP-11

by CLASSICCMP＠trailing-edge.com

>I have a full backup of the drive via COPY. Onto....? Is your backup bootable? > I would like to graft a >different hard disk onto this machine. > >I have available in ST506-type is a fujitsu 40mb and a seagate st4096. >How do connect the second drive? The official way is with a 6-button front panel for your box... but you've got a bigger question to ask yourself first: is your disk controller a RQDX1 (M8639-YA), a RQDX2 (M8639-YB), or a RQDX3 (M7555)? The answer will determine what sort of drives you can hook up. >How would I configure drive geometry to match the drive I am installing? You have to format the "new" drive with the appropriate XXDP formatting program, ZRQB?? for a RQDX1/2, or ZRQC?? for a RQDX3. >How difficult is it to substitute a standard double-sided floppy mech for >the wierd but nifty-looking floppy drives that are in it now? You're asking a lot of really basic questions about this sort of stuff, enough to indicate to me that you haven't read the definitive FAQ about the small DEC drive systems of this era. I highly recommend that you read "third-party-disks.txt" available from ftp.spc.edu and other places, it will answer a *lot* of your questions like this. But, the short of it is, if you have a RQDX1 or 2 you can't put the same drives on it as if you had a RQDX3, and we can't make any specific recommendations until you tell us which you have. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 3 months

1
0
0 0

PDP-11/23 deskside machine

by allisonp＠world.std.com

<It looks like the m7605 quarter-inch streaming tape controller has a bad <PAL? and won't let the ram test continue. I removed it from the machine No idea where you'd get one. <and will look for a replacement IC to get it running. I don't have the <drive anyway. Thanks for your quick response Allison! The machine does <run just fine it appears even without the controller in. Gotta love PDP-11s. ;) <RT11 Version 5 / CTS 300 Version 8 is the system rev that posts at <startup. Killer, CTS300 on it! Nice, very nice! Sounds like it was configured as a multiuser system. Allison

26 years, 3 months

5
9
0 0

Altos machines

by jeff.kaneko＠juno.com

Yeah, I used to maintain one of these beasts in the mid-80's. It is a single 8086, with either 512 or 900-something k ram, and it runs the Xenix-86 OS. The thing used a couple of Q540 disk drives, and with four users on it, swapped it's brains out like you wouldn't believe. The version of Xenix that was running on it at the time couldn't decide if it was Edition 7 or System III-- fsck said it was a System III fs, the banner on start up mentioned something about Edition 7. Anyways, it's amazing what some careful programming can accomplish with <1MB ram, and an 8Mc 16 bit CPU. They ran a cellular billing office with this thing, and they would load subscriber data onto this thing from 7-track (or was it 8-track ?) tape that they got from the mainframe. I had to reload the Xenix OS once-- the default root password is SOTLA :^). Jeff On Sat, 25 Mar 2000 08:09:04 -0700 "Richard Erlacher" <edick(a)idcomm.com> writes: > Well, this model 586 has 5-1/4" drives in the main unit and the tape > drive > is in a separate enclosure. These are desktop-style boxes, though I > doubt > theyd be used on a desktop. The hard drive is a full-height > nominally 40MB > 5-1/4" drive. I've left this thing alone, though it's a source of > Z-80 type > system parts. The HDC is a 2900-based number not particularly > similar to > any other that I can recognize. The tape unit hasn't been opened > yet. I > may get to that some day, but I see the two boxes as a source of > parts and > little else. They're pretty heavy, so I don't anticipate shipping > them > anywhere. > > Dick ________________________________________________________________ YOU'RE PAYING TOO MUCH FOR THE INTERNET! Juno now offers FREE Internet Access! Try it today - there's no risk! For your FREE software, visit: http://dl.www.juno.com/get/tagj.

26 years, 3 months

2
1
0 0

FW: First come first served: VAX 11/750 (UK)

by kyrrin＠bluefeathertech.com

So, would any of our UK members like a VAX 11/750? Possibly one that has a SCSI adapter? If so, please get in touch with the fellow who originated the message shown below. Thanks! Attachment follows. -=-=- <snip> -=-=- On Sat, 25 Mar 2000 12:22:21 -0000, in comp.os.vms you wrote: >>From: "Jonathan Hunter" <jonathan.hunter(a)stud.umist.ac.uk> >>Newsgroups: comp.sys.dec,uk.adverts.computer,misc.forsale.computers.other.misc,misc.forsale.computers.other.systems,vmsnet.misc,comp.os.vms >>Subject: First come first served: VAX 11/750 (UK) >>Date: Sat, 25 Mar 2000 12:22:21 -0000 >>Organization: Totalserve Internet >>Lines: 60 >>Message-ID: <8bib4t$ve$1(a)tcnnt0.totalserve.net> >>NNTP-Posting-Host: jmhpc.ninja.org.uk >>X-Trace: tcnnt0.totalserve.net 953987037 1006 195.226.56.170 (25 Mar 2000 12:23:57 GMT) >>X-Complaints-To: abuse(a)totalserve.net >>NNTP-Posting-Date: 25 Mar 2000 12:23:57 GMT >>X-Priority: 3 >>X-MSMail-Priority: Normal >>X-Newsreader: Microsoft Outlook Express 5.00.2919.6700 >>X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6700 >>Path: news.uswest.net!news-out.uswest.net!newsfeed.berkeley.edu!freenix!oleane.net!oleane!news-raspail.gip.net!news.gsl.net!gip.net!news.xtml.co.uk!news.totalserve.net!not-for-mail >>Xref: news-out.uswest.net comp.sys.dec:9583 uk.adverts.computer:75561 misc.forsale.computers.other.misc:8472 misc.forsale.computers.other.systems:3702 vmsnet.misc:227 comp.os.vms:42164 >> >>Hi, >> >>I have a vaguely complete VAX 11/750 system that I would like to get rid of. >>The notes I have made describing the collection are as follows: >> >>Cabinet containing: >>RA80 - hard disk drive >>RA60 - disk drive unit - removeable >>MODEL RA80-CD >> >>DECserver 200/MC >>"Software Product Description" - April 1988, "The >>DECserver 200 Terminal Server is a network terminal >>switch for Enternet Local Area networks." >>Ports - 8 serial ports; Ethernet AUI port. >>Sticker with Ethernet address (08-00-2B-11-xx-xx) >>P/N DSRVB-AB >>C.S. REV B4 ECO C0006 >>MFG. Cloomel >>------------ >>Model: DSRVB-A >> >>RM80. Built differently to rest, i.e. no seperable sides >>etc. >>Unit at top of cabinet; start/stop switches etc. >>Controller unit underneath, slides out. Two massbus >>sockets - one unconnected; presumably for cable. Other >>has an empty connector in it. Rack full of cards, and >>ribbon cable going to drive unit above. >>MODEL RM80-AD >> >>Tape drive >>MODEL TU81-CA >> >>132-column Line Printer >>MODEL: LP25 >>VARIATION: BA >> >>VAX itself (11/750) >>MODEL SV-BXWAA-AD >> >>Plus miscellanous tapes etc. >> >>There is also what appears to be a SCSI controller for the VAX, made by >>SUMMUS Computer Systems. I understand that this is quite a rare item and >>might be worth something. >> >>If anybody has a need for any of the above, I'm based in Manchester and you >>are welcome to come and collect. >> >>If you don't want to make an offer for any of this, then I will allocate it >>on a "first come, first served" basis. However if you do email me with an >>offer (monetary, or offers of exchange for other interesting computer goods) >>then these offers will take precedence over people wanting bits for free. >> >>Let me know if any of this is of interest. >> >>Jonathan >> -=-=-=-=-=-=-=-=- Bruce Lane, Owner and head honcho, Blue Feather Technologies -- kyrrin (at) bluefeathertech [dot] com Web: http://www.bluefeathertech.com "...No matter how we may wish otherwise, our science can only describe an object, event, or living thing in our own human terms. It cannot possibly define any of them..."

26 years, 3 months

3
2
0 0

Free Oracle/Sun Docs; PETs for Trade

by elmo＠mminternet.com

I have about 120 pounds of Solaris 2.3/4/5 and Oracle 7.0/1/2 documentation for whoever wants to pick it up in Santa Monica. Not quite classic, I know, but otherwise, they're going in the recycle bin, with my eight new unsolicited copies of the PacBell Yellow pages. I have left several Commodore PET 8032's for trade for those interested. Regards, Eliot .

26 years, 3 months

1
0
0 0

BA23 Power Supply

by allisonp＠world.std.com

<Linear/mains frequency supplies normally have internal links (or if <you're lucky an external switch) to select the voltage. AFAIK, DEC <always used transformers that were big enough to work at 50Hz (and were <fine on 60Hz as well, of course). Th BA23 (and 123) PS is a really wide range unit. For 120 nominal, the working range is like 85 to 140V and for the 230 nominal it's 180 to 260 or so. <Ferroresonant supplies (RX01, RX02, some RK02/RK03 systems) are a pain. <IIRC, there is no way to convert the 60Hz version for 50Hz mains short of <a new transformer. Fortunatly they are limited and the PS can be subbed out easily. the induction motors used are also part of the problem. <One other thing remains. Most PDP11s have what's called a 'line time <clock' -- basically an interrupt every mains cycle. This is counted by <the real time clock program in most OSes, and used to keep real time, <etc. Of course if you move a machine from 60Hz to 50Hz power or vice <versa, the real time clock will run slow/fast until you re-SYSGEN the OS <for the appropriate frequency. This is not a big problem -- things still <work -- though. If your really bugged by it you can supply your own LTC derived from other sources. <So in your case. The PSU will be fine if you flip the switch. The machine <should work (everything inside the box runs off the DC outputs of the PSU <and doesn't care about frequency). The real time clock may run slow. Also depends on the CPU board used as some use the TOY clock for LTC. This does not include the 11/03, 11/23 series. The 11/73 series I can only speak on the KDJ-11A I have and that uses a traditional LTC like the 11/23. Later ones may differ. I cheat and synclock a 300hz osc to most submultiples 50/60hz then divide by 5 to get 60hz. Trivial circuit, predictable result. Or take a crystal and divide to 60hz (or 50 if thats what you need). Allison

26 years, 3 months

1
0
0 0

BA23 Power Supply

by CLASSICCMP＠trailing-edge.com

>One other thing remains. Most PDP11s have what's called a 'line time >clock' -- basically an interrupt every mains cycle. This is counted by >the real time clock program in most OSes, and used to keep real time, >etc. Of course if you move a machine from 60Hz to 50Hz power or vice >versa, the real time clock will run slow/fast until you re-SYSGEN the OS >for the appropriate frequency. On many of the operating systems, you don't have to do a SYSGEN - just tweak a number in the configuration word and viola, it's now a 50Hz machine. For an RT-11 machine, in particular, you can tweak this on a running system if you wish: .type 50hz.mac .MCALL .PVAL, .EXIT ; RMON Fixed offsets CONFIG = 300 ;Configuration word 1 CLK50$ = 000040 ;50-cycle system clock HZ50: .PVAL #AREA,#CONFIG,#CLK50$,BIS ;Get configuration word .EXIT AREA: .BLKW 4 .END HZ50 .macro 50hz .link 50hz .show conf RT-11FB V05.07 Booted from DU1:RT11FB USR is set SWAP EXIT is set SWAP KMON is set NOIND MODE is set NOSJ TT is set NOQUIET ERROR is set ERROR SL is set OFF EDIT is set KED FORTRAN is set FORTRA KMON nesting depth is 3 CLI is set DCL, CCL, UCL, NO UCF PDP 11/84 Processor 2048KB of memory Floating Point Microcode Extended Instruction Set (EIS) Memory Management Unit ECC Memory Cache Memory PMI Memory 60 Hertz System Clock FPU support .run 50hz .show conf RT-11FB V05.07 Booted from DU1:RT11FB USR is set SWAP EXIT is set SWAP KMON is set NOIND MODE is set NOSJ TT is set NOQUIET ERROR is set ERROR SL is set OFF EDIT is set KED FORTRAN is set FORTRA KMON nesting depth is 3 CLI is set DCL, CCL, UCL, NO UCF PDP 11/84 Processor 2048KB of memory Floating Point Microcode Extended Instruction Set (EIS) Memory Management Unit ECC Memory Cache Memory PMI Memory 50 Hertz System Clock FPU support -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 3 months

1
0
0 0

BA23 Power Supply

by mbg＠world.std.com

>One other thing remains. Most PDP11s have what's called a 'line time >clock' -- basically an interrupt every mains cycle. This is counted by >the real time clock program in most OSes, and used to keep real time, >etc. Of course if you move a machine from 60Hz to 50Hz power or vice >versa, the real time clock will run slow/fast until you re-SYSGEN the OS >for the appropriate frequency. This is not a big problem -- things still >work -- though. Actually, the KDJ11-B based machines allowed any of the following settings for the LTC interrupt rate: 1) Line time clock (tied to power supply) 2) 50 Hz 3) 60 Hz 4) 800 Hz Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 3 months

1
0
0 0

BA23 Power Supply

by jolminkh＠nsw.bigpond.net.au

I forgot to add that the sticker says it is set for 110v and 60hz. We have 50hz. Perhaps it is necessary to change something on that score. -----Original Message----- From: Olminkhof <jolminkh(a)nsw.bigpond.net.au> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Saturday, 25 March 2000 21:54 Subject: BA23 Power Supply >With all this talk of PDP11/23's I am looking at my BA23 with I think an >11/73 CPU inside it. > >I haven't powered it up because it is set for 110v and we have 230v here. >There's a switch on the back but a big sticker on the PS itself says to >refer to the operating manual . . . sort of like there must be other things >to do also. > >Does anyone here know about these things? > >Thanks, >Hans > >

26 years, 3 months

2
1
0 0

BA23 Power Supply

by allisonp＠world.std.com

<I forgot to add that the sticker says it is set for 110v and 60hz. <We have 50hz. Perhaps it is necessary to change something on that s< That may impact the line time clock (time keeping) but not the PS as it's a switcher. Allison

26 years, 3 months

1
0
0 0

BA23 Power Supply

by allisonp＠world.std.com

<I haven't powered it up because it is set for 110v and we have 230v here. <There's a switch on the back but a big sticker on the PS itself says to <refer to the operating manual . . . sort of like there must be other thing <to do also. Well that switch has two positions... yours is in the wrong one for the home town. The BA23s I've seen all had the "international" power supply. The "see manual" reference is DEC prtoecting themselves. I presume it's the standard Astec H7864A. Allison

26 years, 3 months

1
0
0 0

PDP-11/23 machine boots fine

by allisonp＠world.std.com

<restorable backup of the drive. The two floppies respond to DIR/Bad, and <Init/Bad as devices DU1 and DU2:. But I get 'bad sector in system area' <when I try to init. How do I low-level floppies? Get a DEC Rainbow is teh common answer. There is no LLF utility with RT11 for RX50 (that dual drive). Allison

26 years, 3 months

1
0
0 0

Mac to Bernoulli Cable

by edick＠idcomm.com

The Bernoulli drives I have are all more or less the same, irrespective of their generation. The PC interface card.cable uses a 37-pin (DC37) sub-D connector and that's essentially a SCSI cable with the unused conductors omitted. This makes for fewer conductors in the cable, but, if you look inside the drive, the attachment to the controller is via a 50-conductor ribbon cable, an adapter to which is attached to the bulkead at the rear of the box. The interconnections between the drives are 50-conductor ribbon, and, depending on the generation of the hardware, but for most of the 10 MB 8" drives, the controller is generally a separate card to which the drives attached. It is more or less standard SCSI, though it doesn't work well with other adapters or with ASPI drivers under DOS. I doubt the MAC uses different internal hardware or cabling, though the BERNOULLI drives hung on for a longer time in the MAC environment because of the MAC's smaller size requirement. I have an old Xebec drive which uses precisely the same cabling arrangement as the various BERNOULLI systems I have, and it also is terminated at the drive/controller end in a 50-pin cable from its external 37-pin version. One of the BERNOULLI arrangements I have came with an adapter to the more or less standard Amphenol (looks like a big Centronics) 50-conductor "Blue-Ribbon" connectors. This works because the controller board on the Bernoulli's controller has soldered-in terminations. I'd speculate that if you open a box and attach a typical SCSI-1 device-attachment cable not necesarily with both of the female connectors attached, it will work with standard SCSI cabling. You'll have to make/buy whatever the necesssary adapter from your MAC to the "SCSI-1" cable happens to be, however. Dick -----Original Message----- From: Bill Pechter <pechter(a)pechter.dyndns.org> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Tuesday, March 21, 2000 7:45 AM Subject: Re: Mac to Bernoulli Cable >> > I am looking for a cable to attach a Mac SE (DB25?) to an 8" >> >Bernoulli Drive (Amphenol?) John Sowden >> >> Chances are I have it, but I don't know what it is. The SE SCSI port is >> DB25F (so the cable is DB25M), explain the other connector in more detail. >> The three common ends are; >> >> DB25M, most older mac SCSI devices. >> Centrontics50M, most SCSI devices. >> HD (high density) C50M, compaq and some sony. >> > >Anyone know anything about Centronics to DB50 pin typecables having problems >with termination or termpower on Suns... > >Was there multiple versions of the 50 pin pinout in the early days. > >Symptoms -- hung scsi bus on Sparcstations... inability to probe SCSI >when used. > >Bill

26 years, 3 months

8
15
0 0

BA23 Power Supply

by CLASSICCMP＠trailing-edge.com

>>With all this talk of PDP11/23's I am looking at my BA23 with I think an >>11/73 CPU inside it. >>I haven't powered it up because it is set for 110v and we have 230v here. >>There's a switch on the back but a big sticker on the PS itself says to >>refer to the operating manual . . . sort of like there must be other >>things to do also. >I would be very surprised if there was anything else to do but to toggle >the power supply to 220 volt. The switch will also change for your 50hz >cycle. There isn't anything to change inside the power supply for 50Hz vs 60Hz. All your software should be built or set to expect a 50 Hz line clock, too, of course... (unless you like having your clock run at 5/6ths run at actual speed!) -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 3 months

1
0
0 0

BA23 Power Supply

by jolminkh＠nsw.bigpond.net.au

With all this talk of PDP11/23's I am looking at my BA23 with I think an 11/73 CPU inside it. I haven't powered it up because it is set for 110v and we have 230v here. There's a switch on the back but a big sticker on the PS itself says to refer to the operating manual . . . sort of like there must be other things to do also. Does anyone here know about these things? Thanks, Hans

26 years, 3 months

2
1
0 0

IBM Corporate Songbook

by netsurfer_x1＠hotmail.com

Does anybody know if IBM still prints up copies of their famous (infamous?) corporate songbook? Furthermore, can anybody buy one. That is someting I want to do: Buy a IBM Corporate Songbook, & go to a *Macintosh Expo*, & bust out singing! (I know, I'm sadistic. Thank you. I've worked very hard to become so!) ____________________________________________________________ David Vohs, Digital Archaeologist & Computer Historian. Computer Collection: "Triumph": Commodore 64C, 1802, 1541, FSD-1, GeoRAM 512, Okimate 20. "Leela": Macintosh 128 (Plus upgrade), Nova SCSI HDD, Imagewriter II. "Delorean": TI-99/4A. "Monolith": Apple Macintosh Portable. "Spectrum": Tandy Color Computer 3. "Boombox": Sharp PC-7000. ____________________________________________________________ ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

26 years, 3 months

2
1
0 0

PDP-11/23 machine boots fine

by CLASSICCMP＠trailing-edge.com

>Anyway, the machine works. I would like to format some floppies and get a >restorable backup of the drive. The two floppies respond to DIR/Bad, and >Init/Bad as devices DU1 and DU2:. But I get 'bad sector in system area' >when I try to init. How do I low-level floppies? Are your floppy drives RX33's or RX50's? A RX50 is a two-drive-in-one unit, grey faceplate, two orange marks showing you how to insert the bottom floppy in upside down. You can't format a RX50 on your RQDX controller, you have to do it elsewhere. PUTR is a common choice on a PC, get it at ftp.dbit.com. A RX33 is a TEAC 5.25" HD disk drive. Put a 1.2Mbyte disk in, tell it "FORMAT DU1:", and you'll have it formatted as a RX33. A RX33 can also read/write RX50's, but it can't format them on a DEC RQDX controller. Note that there are third-party Q-bus controllers that let you format RX50's, and if you're running RT-11 5.7 you can use FORMAT/SINGLE on these controllers to make RX50's. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 3 months

1
0
0 0

iOpener

by mbg＠world.std.com

>OK, I got a 6.4 GB laptop drive hooked up and right now the iOpener is >running DOS/BATCH V10-01A on an emulated PDP-11/40+RK05 system. I love >it!!! >It's going to take some real butchery to get the case closed, but I guess >that's to be expected. The low-profile 3M connector barely fit under the >CPU heat sink w/o needing it to be clearanced, that was nice. >BTW the CPU seems to be 200 MHz, not 180 MHz. But it still gets only >about 80 BogoMIPS, pretty slow. I heard last night that Netpliance is making modifications so that people can no longer do this... they are apparently losing a LOT of money selling the machines, having expected to recoup it in the service charges... Can someone confirm this... and maybe confirm the change that they have done (which I understand is simply removal of the cable connector for the drive). Oh, and supposedly back-ordered units will have the mod... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 3 months

5
4
0 0

teletype wanted.....

by pete＠dunnington.u-net.com

On Mar 24, 18:42, Tony Duell wrote: > > White (A) output to printer > > Red (B) input for PX1000 and power > > Screen (C) mass > ^^^^ > Most likely to be 'ground', based on the fact that it's the screen, and > that I've seen words like 'Masse', 'Massa', etc in foreign manuals for > the ground/0V connection. Yes, it does mean "ground". I translated it with a little help from a colleague (thanks, Karsten!) but Wim beat me to it... -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

1
0
0 0

New drives in the M3100/M76

by thompson＠mail.athenet.net

I also had problems with a IBM 0661 disk. I was unable to get it to 512 byte sectors from 524/sector using either RZDISK (VMS) or TEST 75 on my 3100-M76. I was able to format it on my RS/6000-220 using the diag program's service aids/disk media service aid/format disk option in AIX. Although there were no command parameters and no information from AIX on what is was doing, when it was done the disk was reformatted to 512 bytes and I was able to use the disk on the VAX and later make a spare bootable unix system disk on my DEC mips machine. Perhaps the IBM format also turned off the "target initiated sync negotiation" for AIX in the saved config code page in the drive. Paul On Mon, 20 Mar 2000 jkunz(a)unixag-kl.fh-kl.de wrote: > > Run the PROM based formatter on the drive using "TEST 75" to the > monitor. I never did this and had no problems connecting various disks > from Fujitsu, Seagate, Quantum, IBM (including a 1,8GB 0664), ... to a > VS3100m76. The only problematic disk I found is the IBM 0661. This > disk is knowen to be problematic due to the SCSI implementation of the > firmeware of the disk. (e.g. target initiated sync negotiation) --

26 years, 3 months

3
3
0 0

PDP-11/23 deskside machine -DAMN

by hofmanwb＠worldonline.nl

TU58 emulator on a PC, connected to a serial line of a real PDP11 Wim Hofman ---------- > From: healyzh(a)aracnet.com > To: classiccmp(a)classiccmp.org > Subject: Re: PDP-11/23 deskside machine -DAMN > Date: Friday, March 24, 2000 12:21 PM > > I just realized something. Is this a PDP-11 emulator, or are you using a PC > to emulate a TU58 drive? I just realized you're probably talking about a > TU58 emulator. > > Zane > > > > The program was distributed by the author (Sytze Zijlstra) at the PDP11 Sig > > Decus Holland. It is very easy to use and works well. > > > > Wim Hofman > > > > ---------- > > > From: healyzh(a)aracnet.com > > > To: classiccmp(a)classiccmp.org > > > Subject: Re: PDP-11/23 deskside machine -DAMN > > > Date: Friday, March 24, 2000 8:27 AM > > > > > > > I boot a XXDP+ disk image from an emulated TU-58 on a PC running the > > > > emulator program from Sytze Zijlstra This emulator is also very useful > > to > > > > transport data between PC and PDP-11. > > > > > > > > Wim Hofman > > > > > > What emulator program? I don't believe I've heard of this one. > > > > > > Zane > > >

26 years, 3 months

2
1
0 0

iOpener

by allisonp＠world.std.com

<Well, the word from Netpliance is that they've locked out the ability to <modify them. It looks like this is at least in part in the form of the <following blurb, "Modification of the i-opener in any way is in violation o <our terms and conditions". To which my answer is, sorry I don't buy that. Same here since is was changed to say "against the terms and conditions". To say the other is patently stupid. <My guess is they made one of two changes, either the OS is better locked <down, they removed the Hard Drive connector, or both. Of course it's also <been theorized they did something nasty to the BIOS, that seems unlikely <to me, but unfortunatly is possible. Well the bios is AMI 4.51 and that easy to get, the connector is no big deal and is the flash was converted to plain rom the introduction of an IDE device defeats it. In fact from reports the interoduction of TWO IDE devices elimintes it. The rumor mongers have to do better. I really want dos/MYZ80 running on one. Allison

26 years, 3 months

1
0
0 0

Mac Disk Drive

by owad＠applefritter.com

>I've got this MAC 80MB SCSI disk drive which seems to work quite well. What >I wanted when I got the thing, was the box it lives in. On close >examination, I can't find the way to open the thing. The thing is of little >use so long as it is not useable as a SCSI box. It's the right size, etc, >but I want to put something useful in it. > >Does anybody know how it opens up? I think there are tabs in some of the vent holes on the side. (at least, I seem to recall that's how their tape drive was. Sneaky. Tom ------------------------------Applefritter------------------------------ Apple Prototypes, Clones, & Hacks - The obscure, unusual, & exceptional. ---------------------<http://www.applefritter.com/>---------------------

26 years, 3 months

1
0
0 0

Mac Disk Drive

by SUPRDAVE＠aol.com

In a message dated 3/24/00 5:11:56 PM Eastern Standard Time, edick(a)idcomm.com writes: > I've got this MAC 80MB SCSI disk drive which seems to work quite well. What > I wanted when I got the thing, was the box it lives in. On close > examination, I can't find the way to open the thing. The thing is of little > use so long as it is not useable as a SCSI box. It's the right size, etc, > but I want to put something useful in it. > > Does anybody know how it opens up? you didnt give enough detail to say whether its an apple brand external scsi drive which fits perfectly under a plus or se. if it is, there are tiny slots in the sides that you have to push a screwdriver into to release some tabs. very tedious, but no easy way to do it. DB Young ICQ: 29427634 view the computers of yesteryear at http://members.aol.com/suprdave/classiccmp/museum.htm --You can lead a whore to Vassar, but you can't make her think--

26 years, 3 months

1
0
0 0

PDP-1 and PDP-4 architecture????

by IVIE＠cc.usu.edu

>I am looking here for info about the differences between the PDP-1 and PDP-4 >architecture. Bell & Newell's out of print book about computer architecture runs through both architectures (as well as many others). Unfortunately, I don't have a copy so I can't be more specific. I can't even find the photocopies I made of this and other information (I have a couple of large three-ring binders chock full o' architecture descriptions ranging from EDSAC to modern stuff; but my office has moved a couple of times since then, so I've misplaced them). > Can PDP-1 software run on a PDP-4? No. The PDP-4 was designed to be able to use PDP-1 memory and I/O devices (IIRC), but the instruction set is different. The instruction set of the PDP-4 is essentially that used by the PDP-7, PDP-9, and PDP-15; the Bell&Newell book (IIR the source C) claimed the primary difference between the PDP-4 and the PDP-7 was that the PDP-7 used ASCII I/O devices while the PDP-4 used a six bit code. The true mystery is, of course, the PDP-3. It was allegedly a 36-bit version of the PDP-1. I've seen one source that had a drawing of the word format for the PDP-3, but no other information (the source was an "encyclopedia of computers" circa 1960 that was composed of two-page descriptions of each machine which appeared to be taken from the marketing literature for the machine. The PDP-3 was listed, a word format was given, and a couple of trivial benchmarkish statistics; time to perform an add, IIRC. I have a copy of the blurb in the aforementioned three-ring binders which I can't find). Rumor has it that a DEC customer built a PDP-3, but DEC never did. Roger Ivie ivie(a)cc.usu.edu

26 years, 3 months

1
0
0 0

PDP-1 and PDP-4 architecture????

by dylanb＠sympatico.ca

I am looking here for info about the differences between the PDP-1 and PDP-4 architecture. Can PDP-1 software run on a PDP-4? john

26 years, 3 months

1
0
0 0

looking for Hazeltine terminals

by mcguire＠neurotica.com

Hi folks, I'm looking to acquire two models of terminals made by Hazeltine, the 1500 and the Esprit, in good operational and cosmetic condition. I used each of these for a long time many years ago and I'd like to keep one of each for sentimental reasons. Does anyone on the list have one that they'd be willing to part with? I'm willing to pay a reasonable sum. Please let me know. Thanks! -Dave McGuire

26 years, 3 months

4
4
0 0

PDP-11/23 deskside machine

by mbg＠world.std.com

>than the physical. RT-11 doesn't, it does swap jobs to a disk (or VM:). It only swaps to SY... if you're booted from the virtual disk (VM), then that is where it swaps... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 3 months

1
0
0 0

PDP-11/23 deskside machine -DAMN

by hofmanwb＠worldonline.nl

The program was distributed by the author (Sytze Zijlstra) at the PDP11 Sig Decus Holland. It is very easy to use and works well. Wim Hofman ---------- > From: healyzh(a)aracnet.com > To: classiccmp(a)classiccmp.org > Subject: Re: PDP-11/23 deskside machine -DAMN > Date: Friday, March 24, 2000 8:27 AM > > > I boot a XXDP+ disk image from an emulated TU-58 on a PC running the > > emulator program from Sytze Zijlstra This emulator is also very useful to > > transport data between PC and PDP-11. > > > > Wim Hofman > > What emulator program? I don't believe I've heard of this one. > > Zane

26 years, 3 months

2
1
0 0

Resetting C= machines with non-standard implements (was Re: Are you sure the 6550 is dead?)

by ethan_dicks＠yahoo.com

--- Philip.Belben(a)powertech.co.uk wrote: > > > > >> The old PETs don't AFAIK have the internal expansion connector - they have > >> an edge connector sticking out at one side. Very useful for toggling > >> RESET with a pair of tweezers! > > > > Don't miss! > > If I've got to the point where I need to hit RESET, it doesn't matter. It doesn't matter to the software, but there's the risk of shorting things together that don't want to be shorted. > Occasionally I corrupted I/O registers and disabled the interrupts that > serviced the keyboard. You'd better not miss when toggling IRQ with the > tweezers! I used to reset my development C-64 with a paperclip that I bent into a hair-pin shape with a .3" or .4" spacing to fit the proper pins on the expansion connector. I even melted a drinking straw and wrapped it around the top of the loop for a "handle". It was my programmer's reset for years. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

8
10
0 0

looking for Hazeltine terminals

by mcguire＠neurotica.com

On March 24, allisonp(a)world.std.com wrote: > > I'm looking to acquire two models of terminals made by Hazeltine, > > the 1500 and the Esprit, in good operational and cosmetic condition. > > I used each of these for a long time many years ago and I'd like to > > keep one of each for sentimental reasons. Does anyone on the list > > Your missing the 1000 (early glass tty): > > Also 1400, 1420 1500, 1510, 1520, 1552(vt52 clone). Oh yes, I'm familiar with most of the line...I'm only really interested in keeping the two models that I worked on the most. I had a 1500 on an IMSAI-8080 (with a CCS Z80 CPU board) CP/M machine, and the Esprit was the console on my pdp11/34a running RSTS/E. If I hadn't paid more attention to those machines than my high school teachers, I'd surely have been flipping burgers with the rest of my high school friends. And now, 13 years after graduation, some of them are actually *managers* at McD's! WOW! ;) -Dave McGuire

26 years, 3 months

2
1
0 0

11/34 programmers panel available

by wrking＠tsoft.com

A couple of months ago someone posted a message to this list saying that they were looking for an 11/34 programmers panel. I have one available, please contact me. Bill King

26 years, 3 months

2
1
0 0

teletype wanted.....

by hofmanwb＠worldonline.nl

I tried to translate the dutch I wish you luck Wim Hofman ---------- > From: Cameron Kaiser <ckaiser(a)oa.ptloma.edu> > To: classiccmp(a)classiccmp.org > Subject: Re: teletype wanted..... > Date: Thursday, March 23, 2000 6:31 PM > > > No, it definitely doesn't hook up a TV. On the bottom is an acoustic coupler > that acts as both microphone and speaker. The keys say things like SEARCH, > INSERT, RCVE, LIST/PRINT, ON/STOP and LOAD/DUMP. There is a 1/8" stereo > jack on one side which the manual mentions might be connected to an RS232 > port (hope someone can translate this! -- it's Dutch and my schoolboy German > can't figure out enough words): > > ** import text ** To connect another printer than the PXP40 you can use the enclosed cable (see figure 4). The 3 pole round plug fits in the connection at the left hand side of the PX1000. The three loose wires at the other end of the cable should be connected to the printer according to the manual of it. The three wires have the following function: White (A) output to printer Red (B) input for PX1000 and power Screen (C) mass The buttons LIST/PRINT, ON/STOP and the linebutton have the same function as with the PXP40 when you use another printer. > 10.4 Andere printers > Voor het aansluiten van een andere printer dan de PXP 40 kunt u gebruik maken > van de meegeleverde kabel (zie afb. 4). De driepolige ronde steker past in de > aansluiting aan de linkerkant van de PX 1000. De drie losse draden aan de > andere kant van de kabel moeten worden verbonden met de printer, overeenkomstig > de handleiding daarvan. De drie draden hebben de volgende functie: > > wit (A) uitgang naar printer > rood (B) ingang voor PX 1000 en voeding > afscherming (C) massa > > De toesten LIST/PRINT, ON/STOP en de regeltoets hebben bij gebruik van een > andere printer dezelfde functies als bij de PXP 40. > Most printers with an RS232 or V24 are equipped with the here shown 25-pole connector. Not all pins are connected. Most printers will work when you connect them in the here shown manner. White (A) pin 3 Red (B) pin 20 Screen (C) pin 7 Connect pins 4,5,6 and 8 of the 25 pole connector with a wire. > De meeste printers met een RS232-ofwel V24-aansluiting zijn uitgerust met de > hier afgebeelde 25-polige connector, waarvan niet alle pennen zijn > aangesloten. De meeste printers zullen goed werken als u ze op de hiernaast > beschreven manier op de PX 1000 aansluit: > > [ figure, RS-232 ] > > [ figure, 1/8" three-connector jack ] > > wit (A) pen 3 > rood (B) pen 20 > afscherming (C) pen 7 > > Verbind de pennen 4, 5, 6 en 8 van de 25-polige connector met behulp van > een draad met elkaar door. > > ** end import ** >

26 years, 3 months

3
2
0 0

PDP-11/23 deskside machine -DAMN

by hofmanwb＠worldonline.nl

I have formatted a number of MFM ST506 drives (e.g. ST-225) with an RQDX3 on my Qbus PDP-11's. Be careful to set the drives on address 3. I used the maintenance program ZRQCH0.BIC. This maintenace software is available on floppy disk. I boot a XXDP+ disk image from an emulated TU-58 on a PC running the emulator program from Sytze Zijlstra This emulator is also very useful to transport data between PC and PDP-11. Wim Hofman ---------- > From: Technoid(a)cheta.net > To: classiccmp(a)classiccmp.org > Subject: Re: PDP-11/23 deskside machine -DAMN > Date: Thursday, March 23, 2000 8:43 PM > ---------- > From: Technoid(a)cheta.net > To: classiccmp(a)classiccmp.org > Subject: Re: PDP-11/23 deskside machine -DAMN > Date: Thursday, March 23, 2000 8:43 PM > > After putting the skins back on the machine it is giving me a ERROR 13 - > DU0 not ready error. > > DAMN! > > I knew it wouldn't be that easy. I have a couple of spare ST506-type > drives to hang off it but don't know how picky the controller is or where > to find install media for an operating system. The drive sounds fine > (spins up and purges but no boot anymore) DAMN. > > What free operating systems are out there for this machine. I suppose I > will get another drive up and running and then get the data off of this > one if it is possible. DAMN. > > To be honest I think I didn't park the drive before powering off the last > time and suspect a head crash wiped the boot sector or something like > that. Now when I try to boot I hear the drive track but get this error. > DAMN. > > How can I get boots to restore a system? > > Yes, I suspect it ran up to six terminals as there are two controlled from > the cpu card and four controlled by a terminal controller card. > > > 512KB MEMORY KDF11B-BE ROM V0.9 CLOCK > ENABLED > > BOOT MENU > > Device Physical Valid Unit > Name Device Numbers > > DU DSA 0 1 2 3 4 5 6 7 > DL RL01/RL02 0 1 2 3 > DX RX01 0 1 > DY RX02 0 1 > DD TU58 0 1 > XH QNA 0 1 > MS TQK25/TS05 0 > > > TRYING UNIT DU0 > > ERROR UNIT DU0 > ERR 13 DRIVE NOT READY > WISH TO REBOOT [Y,(N)]? > > > -- > ----------------------------------------------------------- > Jeffrey S. Worley > Technical Services > Bits & Bytes Computer Services Inc. > 1979B Hendersonville Road > Asheville, NC 28803 > 828-684-8953 - voice 0900-1700 five days > 828-687-9284 - 24hr fax > Who is General Failure and why is he reading my hard disk? > Technoid(a)Cheta.net > ----------------------------------------------------------- >

26 years, 3 months

3
2
0 0

PDP-11/23 deskside machine

by ethan_dicks＠yahoo.com

--- Megan <mbg(a)world.std.com> wrote: > > >I think he's talking about the opposite of what you mean. You mean using > >RAM as a disk, right? I believe he means using disk for RAM. Which is > >something I personally try to avoid like the plague! > > Actually, it gets more confusing with RT-11, since the term 'virtual > memory' refers to the address space a program can access... it has > nothing to do with disk space... I thought the physical/virtual memory distinction in this case was more of a PDP-11 processor concept than specifically RT-11. > The way to think of it is -- physical memory is the memory the machine > has while virtual memory is what a program can see at any one time. > And with 16 bits worth of address space, that maximum is 32kw (64kb) > at any one time... of course, you can remap portions of your address > space to elsewhere in physical memory, but you are always limited to > accessing 64kb at one time (128kb -- 64kb I-space and 64kb D-space if > you have a processor with separated I and D spaces) It used to bend my brain around backwards until I worked with RT-11 for a while. The problem is that the PDP-11 has mini-computer attributes, but is only 16-bit. Let's try a cross-platform comparison... Machine A: VAX running BSD. Machine B: PDP-11 running BSD. (Easy so far ;-) The PDP-11 has 2Mb of physical memory; the VAX has 2Mb of physical memory. Now comes the tricky part: the *virtual* address space for a program on the VAX is 4Gb, 32 bits. Since well-behaved PDP-11 programs don't twiddle memory management bits, the *virtual* address space for a program on the PDP-11 is 64K (or perhaps 128K if split I&D). Because of the physical nature of the beasts, the VAX has much more virtual address space than physical memory, but the PDP-11 is the other way around. It's just like Megan said, but I've added what might be a more familar model for comparison. It made me woozy at first, too. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

2
1
0 0

Zork (was Re: WinCE (was teletype wanted.....))

by ethan_dicks＠yahoo.com

--- Cameron Kaiser <ckaiser(a)oa.ptloma.edu> wrote: > ::You're welcome. I know someone took the zdungeon image and split it > ::onto two C= floppies, grabbed a Z5 interpreter and played it on their > ::C-64. *That's* dedication. Me, I developed it on an old SPARCstation > ::that's probably classic by now. > > *You* developed it? :-P Yes. I developed zdungeon. It's a port to Inform directly from the MDL Zork sources. I did not say in the above paragraph that I wrote Zork. Perhaps that's the source of your ":-P"? > For the record, I run all my Infocom games on the 64. The black screen > interpreter is fast and can even preload the game into an REU, meaning it > will play entirely from memory. I never that that opportunity. When I was playing Infocom games on my C-64, all I had was a 1541. :-( -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

2
1
0 0

Zor (was Re: WinCE (was teletype wanted.....))

by ethan_dicks＠yahoo.com

--- Wouter de Waal <wrm(a)ccii.co.za> wrote: > WinCE boxen have one very neat use. Put Frotz on it and run old > Infocom games. I use my Palm for that. ;-) > Anyway, so I downloaded dungeon (what zork was called before it > was split in three to fit on a ~100K floppy) and I saw a familiar > name - Thanks Ethan! You're welcome. I know someone took the zdungeon image and split it onto two C= floppies, grabbed a Z5 interpreter and played it on their C-64. *That's* dedication. Me, I developed it on an old SPARCstation that's probably classic by now. http://penguincentral.com/retrocomputing/zdungeon/ (.z5 and .pdb format) -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 3 months

2
1
0 0

Pretty Park = VIRUS !!!!

by sipke＠wxs.nl

English: I have become infected with the prettypark virus and as a concequence you may have gotten an e-mail with the prettypark trojan that distributes the virus. DO NOT OPEN OR EXECUTE THE PRETTYPARK PROGRAM (ON DESKTOP) !!!! If you have become infected connect with the McAfee site for info and advice I will also include a registryfix to disable the virus from the registry. execute it by double clikking on the extracted file. Subscequently use an updated virusscanner to clean any prettypark debris >from your system Your e-mail contacts may also have become infected so it may be nessecary to forward this note Do so with the inclusion of the nopretty.reg registryfix. www.mcafee.com I apologize for the hassle. Dutch: Ik ben helaas besmet geraakt met het Prettypark virus. Dien tengevolge kunt u van mij een E-mail hebben ontvangen die de Prettypark trojaan bevat en het prettypark wormvirus op uw computer zet. OPEN DEZE ATTATCHMENT NIET EN VOER HEM NIET UIT (OP DE DESKTOP) !!! Mocht u dat wel gedaan hebben dan is de kans groot dat ook uw systeem besmet is. Neem dan contact op met de internet site van McAfee en raadpleeg daar de info aangaande het prettypark virus. Ik heb ook een register opschoner bijgevoegd die het virus kan deactiveren in uw systeemregister. Pak deze bijlage uit en dubbelklik erop zodat deze regfix uw systeemregister kan schonen van prettypark troep (dan is het virus nog niet verwijdert maar stopt de verdere werking voorlopig) Haal dan een verse update van uw virusscanner, installeer deze, herstart uw computer en voer een volledige virusscan op uw systeem uit. In dien u besmet geraakt bent kunnen uw E-mail contacten deze besmetting ook weer via u oplopen. In dat geval kan het handig zijn om dit bericht aan al uw contacten door te sturen (nadat u uw evt besmetting verholpen heeft) Voeg dan ook de nopretty.reg registerfix aan uw berich toe www.mcafee.com Mijn verontschuldigingen voor eventuele besmettingen. Sipke de Wal "Only frankness can defeat VD, and for hat I'm not ashamed" "Alleen openheid kan SOA bestrijden, en daarvoor schaam ik mij niet"

26 years, 3 months

1
0
0 0

Pretty Park Worm Virus

by sipke＠wxs.nl

English: I have become infected with the prettypark virus and as a concequence you may have gotten an e-mail with the prettypark trojan that distributes the virus. DO NOT OPEN OR EXECUTE THE PRETTYPARK PROGRAM (ON DESKTOP) !!!! If you have become infected connect with the McAfee site for info and advice I will also include a registryfix to disable the virus from the registry. execute it by double clikking on the extracted file. Subscequently use an updated virusscanner to clean any prettypark debris >from your system Your e-mail contacts may also have become infected so it may be nessecary to forward this note Do so with the inclusion of the nopretty.reg registryfix. www.mcafee.com I apologize for the hassle. Dutch: Ik ben helaas besmet geraakt met het Prettypark virus. Dien tengevolge kunt u van mij een E-mail hebben ontvangen die de Prettypark trojaan bevat en het prettypark wormvirus op uw computer zet. OPEN DEZE ATTATCHMENT NIET EN VOER HEM NIET UIT (OP DE DESKTOP) !!! Mocht u dat wel gedaan hebben dan is de kans groot dat ook uw systeem besmet is. Neem dan contact op met de internet site van McAfee en raadpleeg daar de info aangaande het prettypark virus. Ik heb ook een register opschoner bijgevoegd die het virus kan deactiveren in uw systeemregister. Pak deze bijlage uit en dubbelklik erop zodat deze regfix uw systeemregister kan schonen van prettypark troep (dan is het virus nog niet verwijdert maar stopt de verdere werking voorlopig) Haal dan een verse update van uw virusscanner, installeer deze, herstart uw computer en voer een volledige virusscan op uw systeem uit. In dien u besmet geraakt bent kunnen uw E-mail contacten deze besmetting ook weer via u oplopen. In dat geval kan het handig zijn om dit bericht aan al uw contacten door te sturen (nadat u uw evt besmetting verholpen heeft) Voeg dan ook de nopretty.reg registerfix aan uw berich toe www.mcafee.com Mijn verontschuldigingen voor eventuele besmettingen. Sipke de Wal "Only frankness can defeat VD, and for hat I'm not ashamed" "Alleen openheid kan SOA bestrijden, en daarvoor schaam ik mij niet"

26 years, 3 months

1
0
0 0

WinCE (was teletype wanted.....)

by wrm＠ccii.co.za

>They're black, about the size of (spit) a Windows CE box, I guess. It folds WinCE boxen have one very neat use. Put Frotz on it and run old Infocom games. I recently inherited a Compaq C140 (Cassiopeia A11) and even though it's not 10 years old, it's more obsolete than many 10 year old systems :-) I'm looking for the WinCE 2 upgrade, I even have a part number (ZE20UK or ZE21UK) but... Anyway, so I downloaded dungeon (what zork was called before it was split in three to fit on a ~100K floppy) and I saw a familiar name - Thanks Ethan! Wouter

26 years, 3 months

1
0
0 0

DEC ADV11-A A/D Converter

by pete＠dunnington.u-net.com

On Mar 24, 1:38, Tony Duell wrote: > Or maybe you could put the CPU/RAM/DMA peripherals in a Q22 backplane and > then link that to a Q18 backplay with the ADV11 card in it. If you like, > you could connect BDAL18-BDAL21 between Qbus In and Qbus Out on that > backplane, so that you could have more Q22 backplanes 'dowstream' of it. Wouldn't it be much easier just to modify the ADV11-A? Since the print set shows it does use BBS7, and BC1 is simply grounded, it's apparently just a case of cutting one track to make it work in a Q22 system. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 3 months

1
0
0 0

Best PDP-8/e pics I've seen

by mcguire＠neurotica.com

On March 23, Zane H. Healy wrote: > OK, this is a little wierd. Let me start by saying I have no clue as to > who the person is selling the system, I just think the pictures are the > best I've seen. Beware, they're big, and there is three of them. > > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=291428599 Yes they are nice pics. pdp8s sure are good looking machines. especially when they're running! :-) -Dave McGuire

26 years, 3 months

1
0
0 0

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb