test-drb

test-drb@ccmp.vtda.org

101090 discussions

by classiccmp＠crash.com

[ Spoiler alert - contains details of the program. I caught the [ rebroadcast at 1AM. > > [ Sellam indicates for some program, he supplied old PCs ] > > Even more reasons for any kind US resident person to make an > mpeg of it [...] Or maybe not. I don't think I missed the beginning, and there was nothing about Woz, Cap'n Crunch, etc. It started off with a camera following some PHB through security checkpoints. It was mostly hype, glorifying the "white hats" like Internet Security Systems (www.iss.net) and making their NOC look like the next best thing to 007 and Q. Their handling of the "black hats" wasn't as shrill or alarmist as I'd have expected after the first bit covering ISS' NOC and "AlertCon." The production value was high - they used lots of flashy visual gimickry to let you know how cool this topic and the production team is/was. Didn't do squat for content, but someone had fun inverting color maps, solarizing and posterizing images, making lots of jump cuts, etc. But don't worry, they harped on the potential for an "electronic Pearl Harbor" quite a bit. They had a very touching bit about how the top-level hackers cherish their anonymity because, when they achieve underworld fame, they would be harassed by the hordes of wannabees and ankle-biters... I felt so sorry for them. :^/ I really disliked how they lumped Eric Raymond, John Perry Barlow, and the EFF in as somehow defending these "black hats" and their desire to commit real, traditional crime. They did let ESR get in a couple words expressing the difference between cracker and hacker, but I wouldn't expect my mother to have understood it and they quickly moved on. And then they made his guest accomodations, described as they walked into his office, sound like a stop on some sort of hacker underground railroad... The worst part? They had a guy from the MPAA on describing piracy, and the response from the other side was clearly aimed at the strategy of using DRM to gain control of the desktop by Hollywood. But they didn't explain that they were presenting responses to two different issues, so it looked like the EFF was somehow trying to support people ripping off movies before they're released to the theater. Not good. There's a nutshell review. My opinions, YMMV. --Steve.

23 years, 4 months

The Ne[w|utered] HP (was: RE: The effects of employment)

by Fred.van.Kempen＠microwalt.nl

> The problem there being, if they loose customers, it's going > to either be to > IBM or Linux (or maybe Sun, but that strikes me as a big > maybe, and I for > one prefer Solaris). Killing the Alpha is the one that ticks > me off, but > I'm not to sure if it's Compaq or HP that should get the blame there. Hmmm.... you know, I think I'll hold on to my Linux-based stock and other "assets" in that area... :) Or, maybe, buy Tru64 from HP. [no discussion, please.. YES, i CAN...] --fred

23 years, 4 months

The Ne[w|utered] HP (was: RE: The effects of employment)

by Fred.van.Kempen＠microwalt.nl

Dan wrote: > Well...definitly better then the Itanium boxes. But it's pretty much a big PC, > with the build quality that would imply. kind of disappointing, compared to > their older workstations... Yes. > I'm really just disappointed overall with their decision to kill Alpha and > PA-RISC. Itanium really isn't that good, at least not yet, and they're going > to lose a LOT of customers by doing it. **THAT** was my point, yes. Enterprise customers kinda laugh at the idea of their stuff being of the "Intel Inside" kind, and will be almost impossible to be changed into that. They'll go Sun, or IBM, but will do pretty much anything to NOT be sucked into this "New Big PC crap", as one of them called it. In the old days, we had Sun, DEC, Compaq, HP and IBM for the larger systems. DEC got sucked into Compaq, which also had Tandem. That seemed like not such a bad plan, and it could have worked (my personal opinion.) Now, we loose both DEC/Compaq (so, Tru64/Alpha and VMS/Alpha) and HP (HPUX/HPPA), only to get... _MORE_ Intel crap into this world. Don't get me wrong- I like my PC's. And yes, some of them run Win2000, some do UNIX, whatever. But that's *PC* stuff, for PC tasks. My customers will probably invite me in to come and tell them which vendor of "real" Big Things (tm) they can switch to now, without the chance of having to do that again in two years from now. So... Sun (sigh) or IBM (eek) ? HP loses.. bigtime. And as a shareholder.. indeed, i voted 'no' :) #define NHP /*brainless*/ #define HP NHP --fred

23 years, 4 months

Tubes in computers - numbers, please

by aw288＠osfn.org

There is a large quantity of tubes for sale near me, and while it is silly to think I can buy and store them all, I might be interested in buying quantities of *computer-rated* tubes - things like 5749s, 5814As, 6414s, and so forth. Some day, maybe a 709 will come my way with 1000 empty sockets... Anyway, if any of you folks have information or samples of old tube based computing junk (modules, for example, or old unit-record stuff) - could I bother you to tell me what types of tubes were originally installed? I am looking for specific numbers, not just "dual triodes". It would be nice to know which machines used which tubes - for example: Machine Tube(s) Used ----------------------------------- IBM 604 1684, 2032 Thanks a bunch! William Donzelli aw288(a)osfn.org

23 years, 4 months

Unibus SCSI question

by Antonio.Carlini＠riverstonenet.com

Zane H. Healy wrote: >Unfortunatly the manuals on my FTP site look to be for the UC07/08, not the UC17. A UC17 manual is available here: http://www.spies.com/~aek/pdf/emulex/ Antonio

23 years, 4 months

BBC Acorn

by pete＠dunnington.u-net.com

On Dec 12, 19:39, pete@mindy wrote: > The chips are 4116s No, they're not, Pete, that's a typo. They're 4816s. > The way the keyboard works is quite neat. Maybe I should have been more explicit abut this: the 17-way cable carries +5V, 0V, /RESET, system 1MHz clock, three LED drive signals, and the VIA signals relating to the keyboard. It's "the keyboard interface", if you like. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

Tonight: "Hackers" TV show...

by dwoyciesjes＠comcast.net

Some material for your VCR... Tonight, Dec. 11th, at 10 PM Eastern time, the TLC cable channel is doing a show titled "Hackers". Supposedly a look at black- and white-hat hackers, and cyber crime. Hopefgully it'll be interesting... -- ---Dave Woyciesjes ---ICQ# 905818

23 years, 4 months

free Wang 6540-1 and Fortune 32:16 systems in the Chicago area

by uban＠ubanproductions.com

A friend of mine is cleaning house and has the following two systems available for free pickup in the Chicago area: CPU: Wang model 6540-1 with Wang hard drive model number 6580, Magenetic Peripherials Inc, Control Data corp., Model number 9448 Cartridge Drive, Part No. 77717013 http://64.32.210.122/picts/Computer/Wang/index.html (condition unknown) Fortune 32:16 http://64.32.210.122/picts/Computer/Fortune/index.html Condition: the hard drive does not spin up. Last time I tried to power it up, it displayed: 1 2 3 and then hangs (probably because of the hard drive.) I think it used to count to 10 as it boots. If you are interested in one or both of these, please send email to: Bill (jackbot AT yahoo DOT com) be sure to replace the AT and DOT accordingly. --tom

23 years, 4 months

Tonight: "Hackers" TV show...

by GOOI＠oce.nl

Sellam Ismail wrote: > > On Wed, 11 Dec 2002, David Woyciesjes wrote: > > > Some material for your VCR... > > Tonight, Dec. 11th, at 10 PM Eastern time, the TLC cable > > channel is doing a show titled "Hackers". Supposedly a > > look at black- and white-hat hackers, and cyber crime. > > Hopefgully it'll be interesting... > > Isn't the full title, "Hackers: Computer Outlaws"? If so, > all the old computers in there were provided by me, and the > guy playing Woz with the Blue Box is Alex of the ACCRC. > If you look closely, and you know what I look like, you'll > see a shot or two of me "hacking" in the dark ;) Even more reasons for any kind US resident person to make an mpeg of it and make it availbale for all of us poor souls who do not live in the US. We already miss on all the PDP-11 goodies that are for pick up on the other side of the ocean. - Henk.

23 years, 4 months

The effects of employment

by mbg＠TheWorld.com

Which is interesting because from what I've heard recently, december/january is when to by trying since managers are more likely to get a chance to read resumes... Good luck on your search... Megan

23 years, 4 months

Catweasel Floppy Read/Write Tools, version 3.0

by tim＠tim-mann.org

Version 3.0 of my Catweasel Floppy Read/Write Tools is now available at http://www.tim-mann.org/trs80resources.html. This release adds support for the new Catweasel MK3 PCI card. The older Catweasel MK1 ISA is still supported as well. Standard blurb on the tools: The Catweasel Floppy Read/Write Tools are software for the Catweasel universal floppy disk controller. The tools run on both Linux and Windows 95 or MS-DOS. Source code is included under the GPL. cw2dmk will read several kinds of floppy disk, some of which ordinary PC controllers have trouble with, and save them in the DMK disk image format. (DMK is a format used by the Unix TRS-80 emulator xtrs and by David Keil's TRS-80 emulator for MS-DOS.) cw2dmk does not just read TRS-80 disks; it can handle (at least) any disk written using a Western Digital 177x/179x floppy disk controller, a PC-style NEC765-compatible controller, or a Digital Equipment Corporation RX02 controller. dmk2cw will write any DMK image back to a real floppy disk, and handles the same kinds of disks as cw2dmk. The package also includes the programs dmk2jv3 and jv2dmk, which convert between the DMK image format and the JV1 and JV3 image formats. These programs work without a Catweasel and can be useful for moving images between different TRS-80 emulators. -- Tim Mann tim(a)tim-mann.org http://www.tim-mann.org/

23 years, 4 months

Need information on TRSDOS 1.3 internals

by foo＠siconic.com

Does anyone have any documentation on the data structures of TRSDOS 1.3? Specifically, I'd like to know the catalog structure, as well as the scheme for storing files across multiple sectors. I'm trying to pull some old word processor and perhaps spreadsheet files off some TRSDOS disks using a PC. I already found a utility called READDISK that reads TRS-80 disks on a PC and it worked great. Now I need to extract the files from the image. Is this data published in any of the TRS-80 DOS manuals? Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 4 months

Tubes in computers - numbers, please

by mranalog＠attbi.com

William Donzelli wrote: > Anyway, if any of you folks have information or samples of old tube based > computing junk (modules, for example, or old unit-record stuff) - could I > bother you to tell me what types of tubes were originally installed? I am > looking for specific numbers, not just "dual triodes". I have a few IBM plug-in (?logic?gate?) modules. Module Tubes AM-5 one tube - 5965(maybe "A") IBM Part# 317261 CF-503 one tube - 5965 PW-505 one tube - 7044 IBM P# 124720 CF-5 one tube - 5965(maybe "A") IBM Part# 317261 TH511 two tubes, both 5696 top one IBM Part# 288626 bottom one IBM Part# 288625 Computer model number unknown And they all look similar to this: http://dcoward.best.vwh.net/tubes2.JPG --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://dcoward.best.vwh.net/analog =========================================

23 years, 4 months

Acquired a PDP11/44, but missing M7095

by glenslick＠hotmail.com

A google search for M7095 turned up www.jtcomputer.com so I already sent an email earlier tonight inquiring about a M7095. Are they a decent place to do business with? I just tried an old barrel key from a Kryptonite lock and it does work (a little rough to insert & remove) so that takes care of that problem. I didn't get any disk subsystems. The rules of the surplus department where I aquired the CPU dictate that disk drives be destroyed before systems are made available to the public. The I/O cards that were installed were an M7521 DELUA ethernet, CMD CDU-720/TM SCSI, M7819 DZ11-A octal serial, Digital Pathways TCU-150 clock module?, M7258 LP11, Datasystems DLP-11. The CPU came in a rack that is about three times the height of the the PDP11/44 and about 1.25x as wide. It's a Digital rack, but I didn't see a model number on the rack. The rack itself really heavy. They used a forklift to load it into my van and I was able to get it out of the van myself with the careful application of gravity, but there was no way I would have been able to get it into the house. I did download the User's Guide / System Technical Manuals which came in handy when I got stuck trying to figure out how to release the rack slide lock mechanism. Now I've got the CPU out of the rack and in the house were I can work on it. The rack did have bulkhead connectors and cables for the M7521 DELUA ethernet (AUI) and the console (DB25). The rack had a couple of other connectors I didn't recognize, I think they must have been cabled up to the M7819 DZ11-A and M7258 LP11. There is no breakout pod for the M7819 DZ11-A. The DLP-11 had a very long LPT ribbon cable attached. It might have originally been attached to a huge Genicom? printer that was also available at the surplus place, but I passed on that at the time. I inspected the insides before thinking about trying to power up the CPU and when I realized the M7095 was missing (I wonder why it was removed?) I didn't go any further. Also, while the power supply is configured for 120VAC it has the high current (20A) plug with one of the lugs rotated 90 degress and I don't think I have any compatible outlets in my house so that is yet another challege to solve. If I do get the CPU running, then I'll have to figure out what software I should try to run on it. I don't really know much about PDP11 software yet. -Glen >From: John Lawson <jpl15(a)panix.com> >Reply-To: cctalk(a)classiccmp.org >To: cctalk(a)classiccmp.org >Subject: Re: Acquired a PDP11/44, but missing M7095 >Date: Wed, 11 Dec 2002 01:58:00 -0500 (EST) > > > >On Tue, 10 Dec 2002, Glen S wrote: > > > I recently acquired a surplus PDP11/44 (my first real PDP11) and it >appears > > that it is in reasonably good condition, but after opening it up to >check > > out what modules were installed I realized that it is missing the M7095 > > control logic module, one of the 5 core modules that make up CPU. >Anyone > > know where I can find one of these at a reasonable price, or have a good > > spare that they care part with? > > Congratulations! Join the Club.... ;} > > A lot of DEC Stuff is listed here ( they also sell on eBay ). > > www.jtcomputer.com shows a M7095 - $25.00 > > > > > > Also, the keyswitch for the front panel is missing. Anyone know where I >can > > find one of those, or is there an easy way to bypass the switch? > > > > Any barrel key will work... one of mine has flutes, but the other ( a >red plastic one marked 'anti static' has no flutes at all. > > > > On the plus side a CMD CDU-720/TM SCSI controller was installed so if I >get > > the CPU running I hope it won't be too hard to connect it to a SCSI hard > > drive and tape drive. > > > > Depends on the OS you use, and how you generate the new system. > > Did you get any other peripherals, especially the disk subsystems that >were once attached? Is the console serial cable present? ( a longish >cable terminating in a DB25). Any other I/O cards? Have you powered the >machine on yet? Be careful of the power supply - they're REALLY deadly >with the covers off. ALso be sure the fan deck is running. > > Oh yeah - did you get any Doc with the system... or can you get a copy >of the PDP-11/44 System Technical Manual and the System User's Guide... >these will be most helpful getting the beast to wake up. > > Keep us informed of your progress... there are several /44s up and >running among us. > > Cheers > >John _________________________________________________________________ MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. http://join.msn.com/?page=features/virus

23 years, 4 months

Fw: DEC 7000 (AXP) stuff available in Austin, TX

by rschaefe＠gcfn.org

As seen on the NetBSD port-vax list... Bob ----- Original Message ----- From: "Olof Johansson" <offe> To: <port-vax> Sent: Wednesday, December 11, 2002 1:10 PM Subject: DEC 7000 (AXP) stuff available in Austin, TX > This is somewhat offtopic given the processor architecture, but given that > everything else on these systems seems to be common with VAX: > > I just came back from looking at some of the stuff a local liquidator is > trying to get rid off. It's 3 or 4 DEC7000's (all of them alphas, as far > as I can tell. At least one of them 2-CPU). Each machine has one or two XMI > boxes as well. There's also a crapload of disk arrays, with 1/2/4GB disks. > > Most of this seem to have been clustered (using OpenVMS). I also spotted > a couple of TZ87/86 units. > > I'm not enough of a texan to own a huge truck, and given the sheer size of > all this equipment, there's no way I can even resque some of it for anyone. > But I figured if there's someone else in the area that's interested they > might want to know about it. > > The liquidator can be reached at 'derrick' [less the quotes] > @sanmarcos.net or 512-665-6655. > I have no idea what kind of money he might be looking to get for it.

23 years, 4 months

The effects of employment

by mbg＠TheWorld.com

>> > * I will no longer gripe about lack of funds in nearly every post. >:-) >> >> Yes, now you will move to the group that gripes about lack of spare >> time. :-) > >Allow me to welcome you to that group :^) While I, unfortunately, will soon join the group of those with worries about money and future because after 25 years with DEC/Compaq/HP, the company has decided to continue without me... I will sonn be a statistic in the on-going merger work of HP and Compaq... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | email: gentry at zk3.dec.com (work) | | Unix Support Engineering Group | mbg at world.std.com (home) | | Hewlett Packard | (s/ at /@/) | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 (DEC '77-'98) | required." - mbg KB1FCA | +--------------------------------+-------------------------------------+ Soon to be ex-HP.

23 years, 4 months

PDP11/44 system mains current

by jpl15＠panix.com

As a working example: I have an 11/44, FPP, 2MW, 2 DZ11, RLV11, Dilog ESDI card. 1 RL02 2 5 1/4" ESDI drives in a PDP11/23 chassis of all things. All this is in an H960 with the usuall DEC power control box... all of it plugs into an outlet in my dini^H^H^H^H machine room, which is on a 15 A breaker... I have yet to amprobe it, but if it's more than 8A at 120 I'd be quite surprised. Now, when I get the Kennedy 9100 and another RL02 hooked up, and an LA36.... sigh. it never ends. Cheers and ZZZZaaaappp! John

23 years, 4 months

BBC Acorn

by rigdonj＠cfl.rr.com

Today I went and picked up another part of my lot of computers that I bought last week. One of the things that I brought home today was a BBC Acorn computer. I'd heard of these but never seen one before. I was pleasantly surprised to find that this one was apparently built for use in the US and that it operates from 110 VAC 50 or 60 Hz and has a US style power plug. Does anyone know how many of these were imported into the US? I'm assuming that since it's set up for US power system that it will also operate on standard US TV and monitor frequencies. Does anyone know for sure. BTW the model number on this one is UNB 09. All the Acorn websites that I've found only list models A, B and B+ so I'm not sure what this is equivelent to. Joe

23 years, 4 months

Acquired a PDP11/44, but missing M7095

by glenslick＠hotmail.com

I recently acquired a surplus PDP11/44 (my first real PDP11) and it appears that it is in reasonably good condition, but after opening it up to check out what modules were installed I realized that it is missing the M7095 control logic module, one of the 5 core modules that make up CPU. Anyone know where I can find one of these at a reasonable price, or have a good spare that they care part with? Also, the keyswitch for the front panel is missing. Anyone know where I can find one of those, or is there an easy way to bypass the switch? On the plus side a CMD CDU-720/TM SCSI controller was installed so if I get the CPU running I hope it won't be too hard to connect it to a SCSI hard drive and tape drive. _________________________________________________________________ Protect your PC - get McAfee.com VirusScan Online http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963

23 years, 4 months

RL02 Disk Cartridge Problems

by cmcnabb＠4mcnabb.net

I just received an RL02K-DC disk cartridge that I won on Ebay. It looks the same as all my other cartridges, and the shock indicator is still white. When I put the cartridge in either of my drives, it spins up for a while then the fault light comes on. This does not happen with any of the other RL02 cartridges I have. I can see no difference between this cartridge and any of the others, and it seems to take no less force to turn by hand. I'm wondering what I could be missing. Any help would be greatly appreciated. -- Christopher L McNabb Operating Systems Analyst Email: cmcnabb(a)4mcnabb.net Virginia Tech ICBM: 37.1356N 80.4272N GMRS: WPSR255 ARS: N2UX Grid Sq: EM97SD

23 years, 4 months

RL02 Disk Cartridge Problems - why that particular pack is junk

by bqt＠update.uu.se

Jumping in a bit late... On Tue, 10 Dec 2002 ard(a)p850ug1.demon.co.uk (Tony Duell) wrote: [description of RL02 physical format deleted...] > > There is also a "guard track" on each side of the data track,whose > > purpose is to cause the head to go back to the center of the data track > > should it drift. > > Is there? I was under the impression there were guard bands on the very > inside and very outside of the disk (used when the heads are loading, > etc). Bot not between each pair of data tracks. I think you are correct, and that the original poster misunderstood the manual. (Actually, I'm pretty sure you are correct :-) > There are, however, offset (from the track centre line -- in fact I think > they're halfway between 2 adjacent tracks) signals in the header area. > > > Something like : > > ===== ==== > ---DATA---- -----Next data----- > ==== ==== > -- Data----- ----Yet more data-- > ===== ==== > > Where the ==== are the servo signals. Huh? No. Actually, the data track itself is used as the servo signal. The head centers in on the track by centering on where the amplitude is strongest. > > When a drive is told to seek to a particular sector, it reads the > > factory written sector header to determine if it is the correct sector. > > If the drive can not find this info quickly enough, it will fault. > > Sorry, but no. The drive doesn't check the headers at all. I've been > through the schematics and there's nothing that will look at digital > data on the disk. It will fault if it can't find the servo signals, though. Actually, the *drive* just moves a number of tracks back and forth. (And seek is just to a relative track). When you progam a driver to seek to a track, you check the current track, calculate the track delta, and request that of the drive. When the drive report ready you once again check the track to see which one you actually are on. Hopefully it is the right, but if not, do another seek. However, when you *read* a sector, the *controller* checks that you read the right sector by checking every sector header that the head passes over, and when the right one comes, the data is transferred (the same applies for write). If the right sector don't show up, it will fail, but I don't think it will fault. > > It seems to me that to correctly format one of these disks after a bulk > > erasure, you would have to be able to do the following: > > 1. Correctly position the head - probably the easiest part > > I would think that generating the right pattern of bits for the header > was the easy part. That's just (relatively slow) digital electronics. Correctly position the heads when you don't have a servo track, and the heads are actuated by voice coils, means you cannot position the heads at all. So that is a big hurdle. Find another type of drive for formatting, that is item #1. > > 2. Write the correct sector header, including addressing Which no RL01/RL02 controller can do. There is no function to write sector headers. So, in addition to finding another drive to be able to position the heads, you need another controller, to be able to write the data. > > 3. Write the guard tracks ( I bet this is the most difficult) > > If you mean the 'servo bursts', well, you need to be able to accurately > position the heads on half tack spacing. Actually writing the signals is > easy. Yes, once the above conditions have been fulfilled, actually writing is the easy part. > > 5. Create the "Bad Block" file at the end of the disk. > > > > So, looking at the above, I can see where it would very difficult to > > format one of these guys using a stock RL01/RL02 drive, even modified. > > IMHO the really hard part is going to be positioning the head accurately > at half track spacings... You don't have any half-track spacings. However, you also need to write the guard bands, which are outside the normal data area. But if you happen to have a drive you can move the heads about with absolute precision (well, pretty good precision anyway), and being able to write headers, I doubt writing the guard bands would be that hard. You just have to know how the guard bands look physically. The drive recognoze them, and immediately move back to the data area if they show up. Johnny Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt(a)update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

23 years, 4 months

KIMplement for the C64

by spectre＠stockholm.ptloma.edu

I've threatened to do it and so I did. This is The Incredible KIMplement, a partial emulation of the KIM-1, entirely in software, for the stock Commodore 64. http://www.floodgap.com/retrobits/kim-1/ This isn't a joke. It has a full software 6502 core, which works by distilling opcodes down into "safe" equivalents and running those natively to reduce the work it has to do. All memory access is trapped and abstracted. The 6502-on-6502 core is machine-independent and hopefully I can use it to do tricks like virtual memory, protected memory and interruptable/restartable instructions. The emulator includes LED emulation, 6502 emulation (NMOS documented instructions only), SST emulation, keypad emulation, and even supports an emulated TTY. No interval timers yet, but I'm working on it (the ROMs have been trapped so they don't need them). Revision E ROMs are built-in. Hope no one still asserts the rights ... Thanks to Jim Butterfield and Peter Jennings, I've also included Lunar Lander, Addition, Key Train, Sort (all from First Book of KIM) and the original Microchess as a separate download. Beware of Microchess; on the emulator running on a stock C64 in Normal mode, it will take about 30 minutes to compute a move! :-) In the future, I want to use that software core to make a proper OS for the C64 (or Commodore One). The 6502 has gone too long without a proper MMU. Let me know what you guys think, -- ----------------------------- personal page: http://www.armory.com/~spectre/ -- Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu -- Remember, kids: for great justice take off every zig! ----------------------

23 years, 4 months

Acquired a PDP11/44, but missing M7095

by glenslick＠hotmail.com

The CPU has the 14 slot main backplane and a 9 slot expansion backplane, connected together with the M9202 jumper card pair. When I first opened the top the M9202 jumper card was plugged into slots 12 and 14 of the main backplane. I assume it is really supposed to plug into slot 14 of the main backplane and slot 1 of the expansion backplane to bridge the two so I moved it there. The M9302 terminator was in slot 9 of the expansion backplane. I believe all row D connectors except the empty 10,11,12 memory slots either had a card installed or had a stubby little card grant card installed. I didn't pull any of them to see what they were (G727, G7270, G7273?) > BTW - how many slots / backplanes are curently installed? How many free >slots? How many BUs Grant cards are in open slots? It is also possible >that you will need access to the underside of the machine at some time (to >attach/remove NPR jumpers) so don't mount it where that would be >difficult, until you have the System stable and configured the way you >want it. > I did pull the power cord panel off of the back of the power supply and it looks pretty easy to swap the existing power cable with one with a more common plug so that's what I'll do after I manage to track down a replacement M7095 and get to the point of trying to power up the CPU. > Not too bad - get a 15A plug from any of the Home DIY places or a big >hardware store. Take off the (should be attached with various screws and >clamps) existing 20A plug and attach the 15A one. Remember that the the >Black (hot) wire goes to the Brass terminal, the White (neut) wire goes to >the Silver terminal, and the Green (gnd) wire goes to the green (or black) >Ground terminal. > > Your CPU, configured as it is now, will draw maybe 6 or 7 amps from the >wall at 120V, so you're good to go. _________________________________________________________________ MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. http://join.msn.com/?page=features/virus

23 years, 4 months

One more screwup with the Ace...

by pete＠dunnington.u-net.com

On Dec 10, 22:36, Philip Pemberton wrote: > pete(a)dunnington.u-net.com wrote: > > On things like that, I often don't even try to rescue any suspect ICs > > or even passives, just cut them off close to the PCB with a very fine > > pair of sidecutters, and then desolder the stub of pin. > That's what I've been doing. I've been desoldering using "Soder-Wick" - I > got a small reel of it for 90p. You'd be much better off using a nice BIG solder sucker. Wick is really good for removing excess solder, say from a "generously" reworked SMT device, but not ideal for common-or-garden ICs. > In order to > limit damage to the ICs due to heat, I gave them a quick blast of freeze > spray and then soldered them. I hate to say it, but that's not a good idea. IC's don't mind heat if it's evenly applied (think infra-red reflow oven) but thermal shock can break seals etc. > > How adept are you > > with a soldering iron? > Six years of experience, three with a Maplin elcheapo, three with my Antex > XS25 (25 watt). Well, at least it's not one of those nasty Antex 15W irons, but I prefer a 50W temperature-controlled iron. The risk with a small iron is that the tip cools down as you put it on the work, and the lower-wattage irons can't heat it up very quickly again. Result is that the joint isn't really hot enough. > > Did you get the 2114s and Z80 I sent you? They should have arrived > > this morning. > Yup, they arrived this morning. Fitted them and the random, static garbage > has been replaced with scrolling garbage. Grr... Well, it's *some* improvement :-) > As for your offer to have a look at it, I might just take you up on it. I've > got a schematic for it (drawn by Bodo Wenzel) for a clone of the Ace, some > bits are different, 90% of it is the same though. OK. I'll mail you my address and phone number off-list, and maybe we can get together. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

HN462532G - same as TMS2532?

by philpem＠dsl.pipex.com

Hi, I've just bid on some Hitachi HN462532G EPROMs on Ebay - item numbers 1943283712 1943523215 and 1943750626 (I've bid on the first two - feel free to outbid me, just leave me with at least one pack of three). Can someone please confirm that these are pin-compatible with the TI TMS2532? I found a pinout on R. Steve Walz's webpage (www.armory.com/~rstevew), but I'd like confirmation from someone who's attempted to use the Hitachi chips as replacements for the TIs. Thanks. -- Phil. philpem(a)dsl.pipex.com http://www.philpem.dsl.pipex.com/

23 years, 4 months

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