test-drb June 2010

test-drb@ccmp.vtda.org

167 participants
232 discussions

by rdawson16＠hotmail.com

Hi Dan, If you still want to get rid of an non working asteroids board, count me in! I can fix the others too, if you wish. The problem for most folks is that they will need a vector type monitor, thats a little harder to find, but I see them out there for about $300. Wells Gardner if I recall. Here's a interesting page on the vector generator... http://jmargolin.com/vgens/vgens.htm Randy Dawson _________________________________________________________________ The New Busy is not the old busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:…

14 years

DEC RQZX1 and KDJ11-E boot problem?

by bqt＠softjar.se

All right. Time to clear up some misconceptions, I see... :-) Nigel Williams <nigel.d.williams at gmail.com> wrote: > On Sun, Jun 13, 2010 at 3:11 AM, Zane H. Healy <healyzh at aracnet.com> wrote: >> Of course you may simply have some sort of hardware issue going on there as >> well, I'm not familiar with the RQZX1. > > The drives passes the built-in RQZX1 diagnostics, which includes > read/write/verify tests etc. I formatted the SCSI drive via the RQZX1 > too (prior to using the drive on Linux via SIMH to install RSTS/E), > just in case the format process was doing something special (although > I can't imagine what since I understand MSCP masks drive specifics). Well, when you format the drive on the RQZX1, the controller might put down some special information on the disk. But once you move that drive over to your PC, you are no longer talking MSCP, nor are you aware of any special areas set aside by the RQZX1, so you will most likely overwrite any such information making the formatting pointless. Ie, if the RQZX1 is putting some special information on the disk during the formatting, you cannot then take the drive to some other system and connect and use it there expecting things to not become messed up. However, if the RQZX1 does not put down any special information on the disk, what you do should work fine. But in that case, a formatting will not make any difference either. MSCP in a way do more than just "mask drive specifics". I don't have my RQZX1 manuals anywhere near, so I can't say more about any RQZX1 specific things. Sorry... > A next posible step is to use this source-code for a MSCP boot so I > can catch the initial boot load and see what is in the first disk > block (containing the next level bootstrap): > > http://www.slowdeath.com/AK6DN/PDP-11/M9312/23-767A9/23-767A9.lst I doubt that will help. I suspect that it is the controller which just throws an error back at the boot code when it tries to read the boot block. So nothing will be read. > I will also try a different model of SCSI drive too - perhaps the > Quantum Fireball is too much of a good thing (4200RPM 2.1GB); I have > an old clunker of a Quantum ProDrive 80S (3600 RPM 80MB!) > > Does anyone know how SCSI ID's are mapped to MSCP LUNs? so far the > RQZX1 appears to map the first SCSI ID (in my case #4) to LUN 0 (which > is what I want) - I am assuming it just does them in sequence. I would have thought that SCSI id #0 should map to LUN 0. #4 have traditionally been reserved for tapes (or was that CD?), although that could also have been #5 or #6. Johnny

14 years

Cromemco Z2-D system and accessories in Seattle, WA - Wish to donate

by wysoft＠hotmail.com

I would like to note to all that the system has been claimed and given a new home. Thanks to all of those who responded. Jeff ---------------------------------------- > From: wysoft at hotmail.com > To: cctalk at classiccmp.org > Subject: Cromemco Z2-D system and accessories in Seattle, WA - Wish to donate > Date: Fri, 11 Jun 2010 20:02:41 +0000 > > > Greetings, > > I'm posting here to inquire about the possibility of someone wanting to take this old Cromemco off my hands. I appreciate all that it is, and it has some family history behind it, but no one else in my family seems to want it, and it's far beyond my era of interest, so... Here we are. > > The system itself is in good physical shape - no damage, structural or cosmetic. My late uncle also built a wooden rolling base for the system, which includes additional power outlets for peripherals, and a remote reset switch. He developed software for Boeing on this machine, and I imagine it was pressed a lot. > > Based on the advice of others, to avoid damage to the unit I have not powered on the unit or plugged it in. > > Hardware installed in unit: > CPU board, 4FDC, 8PIO, two 64KZ boards > > Additional hardware, still in boxes: > 16-FDC, four 16KZ boards, two WANGCO floppy drives > > Zenith Z-29 terminal is also included if you wish, though I had originally intended to keep it. I used it over a year ago to do VAX stuff, and it still worked. There is also a printed manual. > > Printed and bound documentation: > Word Processing System, Cromix Operating System, Database Management System, Cromemco Extended BASIC, Z-80 Macro Assembler, Link and Lib, CDOS, FORTRAN IV, Cromemco System & Components, Cromemco Trace System Simulator, Zilog Z-80 Tech Reference > > There's also a huge stack of assorted manuals, catalogs, etc. My uncle really kept everything. Also included are a fair amount of my uncle's scribblings and notes, some of which might be helpful to you. > > Software (almost too much to list): > CDOS 2.36, CDOS 2.54, Z80 Macro Assembler, Word Processing System 4.06 & 6.0, FORTRAN & utilities, CROMIX, Database Management System 3.05, Database Report Language 1.0, Relocatable Assembler, BASIC 5.2, 16K Extended BASIC, COBOL, Database 0.02 (?), Drivers (?) > > I'll gladly snap photos if you wish. > > I would really, really like to avoid having to dispose of this stuff. I never knew my uncle, but if I hadn't taken this stuff from where it sat for the past twenty years in my grandmother's basement, it would have ended up in the trash. Hopefully someone here can make good use of it. > > I'm in Bremerton, WA. I'll drive to meet you within a reasonable distance. Please let me know if you have any additional questions. > > Thanks, > Jeff > > > _________________________________________________________________ > The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. > http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&ocid=PID2… _________________________________________________________________ The New Busy is not the old busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:…

14 years

Making Amiga Disks...

by alhartman＠yahoo.com

I recently picked up an Amiga 500 on eBay. I may have some Workbench disks that will work with it. In case I don't. Does anyone have advice on how I can get disk images and make floppies from them readable by the A500? I have PC's and Macs with floppy drives available to make the disks. Thanks! Al

14 years

Any HP80-seires experts around?

by ard＠p850ug1.demon.co.uk

Are there any HP80 seires experts here? I've got a curious quesiton. I am looking at the HP82909 128K RAM module (for the HP86/87 series). There are several places on the PCB that are not used -- from memory, thre are 4 locations for 14 pin ICs. More curiously, there's a place for a rssistor and transsitor to drive the ROMDIS/ line on the computer connector. I am pretty sure the 'missing' chips are simple logic functions. One is very probably a '74. Another may well be a '30. But I haven't worked out the details yet. My guess is that some HP product actually used this extra logic. So my 'curious quesiton' is : What product was it? -tony

14 years

PDP 11/23+ on Craigslist (LA)

by mdavidson1963＠gmail.com

On Tue, Jun 8, 2010 at 3:56 PM, Zane H. Healy <healyzh at aracnet.com> wrote: > At 11:03 PM +0200 6/8/10, St?phane Tsacas wrote: >> >> http://losangeles.craigslist.org/sfv/sys/1777867686.html PDP 11/23+ - $1 >> (Sherman Oaks ) >> >> Western Digital , PDP 11/23+ , Brand New , Never Used , RLO2 , Kenedy Tape >> Drive > > It's probably just as well I'm no where near close, but I have to question > the description. What is the odds of a 20-30 year old system being "brand > new", and where do the Western Digital and Kennedy Tape Drive come into play > based on the photo. ?I see a /23+ and two RL02's. ?A rather nice config. ?I > have a /23 like that, though lack the rack. I'll let you know... I've contacted the seller and told him that if he didn't get any local offers, I'd be interested (I'm in San Jose). The family would enjoy a long weekend drive to LA... :) Mark

14 years

DEC RQZX1 and KDJ11-E boot problem?

by bqt＠softjar.se

"Zane H. Healy" <healyzh at aracnet.com> wrote: >> >I will also try a different model of SCSI drive too - perhaps the >> >Quantum Fireball is too much of a good thing (4200RPM 2.1GB); I have >> >an old clunker of a Quantum ProDrive 80S (3600 RPM 80MB!) > > Do you happen to have any DEC RZ2x HD's? I'd recommend giving those > a try. While RSTS/E 10.1 doesn't require these, it is possible that > the RQZX1 does, or the combination of the board and RSTS/E does. No, that will not help. But I agree that those drives are nice. > RSTS/E can be touchy. I was totally unable to install DECnet/E from > 4mm DAT using a TLZ06, even though I installed RSTS/E 10.1 that way. > On the other hand the install worked just fine using a TK50 and TKZ30 > drive. RSTS/E is sometimes very picky, which is sad. It absolutely requires that some stuff be installed from a specific type of tape drive, that write protection is on, or other weird requirements for things to succeed. I think John Wilson documented that pretty good in his E11 manual. Other PDP-11 OSes are more sensible. I don't know why DEC did things so strange in this aspect for RSTS/E. > Personally I'm using a PDP-11/73, Viking QDT, a 50-pin 2GB Seagate > Barracuda SCSI HD, and a Plextor 8x Caddy CD-ROM drive to run 10.1. Me, I'm using a CQD-220, five different SCSI disks, DAT, Exabyte, and occasionally I've also had different CD-ROM drives in there as well. But I've only run RSX and 2.11BSD on my hardware. (11/83, 11/84 and 11/93 systems). (Well, the 11/84 used a CDU-720, but anyway...) Johnny

14 years

PDP 11/23+ on Craigslist (LA)

by charlesmorris800＠centurytel.net

On Sun, 13 Jun 2010 12:00:07 -0500, you wrote: >>off list that I can answer. Again, two cabinets, condition looks >>like it was stored in a garage (not pristine, but not rusted >>either). He says "well I powered it on 10 years ago and it worked" >>when I explained the situation about his idea of value, and mine. > > With most of the stuff I see that I might be interested in, the sellers seem to >have a very inflated sense of value. It seems that the value fluctuates over a wide range depending on where it's located, among other things. I also have a perfectly good working 11/23+ that I have no need for (RT-11, 4 MB RAM, two RL02's, corporate cabinet) but I'm not inclined to just give it away free either... so I guess it can just sit there until it IS worth a few bucks!

14 years

Semi-OT: Apple iPad

by madodel＠ptd.net

> Okay, I know the iPad is totally OT, but here is my question, does > anyone on this list have one, I have a wifi only iPad. Standard it uses Safari to read pdfs directly from the web. You can buy pdf reader apps though. > and have you tried using it for reading > PDF's off of Bitsavers? How practical is this? > It should be fine for reading pdf's. There are several apps for pdf viewing, but I'm not sure what they add. I have never used it for reading PDF's off of Bitsavers, but then I think I've only looked at one pdf in the month or so I have had it. OK I just tried and it worked. I was able to browse bitsavers.org and view a pdf. Just a very basic reader though. Mark > I'm finally making real progress at getting my computer "lab" setup > with the systems I plan to keep, and don't have a way to read manuals > out there. Currently the only computer that doesn't have a VT420 > attached is the Commodore 64. Guess I should get the SGI o2 or > Sunblade 1000 hooked up... > > Zane > > > > -- > | Zane H. Healy | UNIX Systems Administrator | > | healyzh at aracnet.com | OpenVMS Enthusiast | > | | Classic Computer Collector | > +----------------------------------+----------------------------+ > | Empire of the Petal Throne and Traveller Role Playing, | > | PDP-10 Emulation and Zane's Computer Museum. | > | http://www.aracnet.com/~healyzh/ | > > -- Mark Dodel<madodel at ptd.net> sent by ibisMail on my Apple iPad!

14 years

pdp8/a rebuild

by trestivo＠cfl.rr.com

Does anyone know a reason why I can't remove the G8018's and G8019 and replace them with newer OEM power supplies? I know that one G8018 supplies 5V @ 25a, +15V @ 2a, -15V @ 2a and +20V @ 4a. I believe the 20V is only used for core memory. So.a 5v supply @ 50a should be sufficient, and a 2 dual output +/- 15v supply @ 2@ each should be a reasonable substitute. I am aware of the functions of the G8019 and that I would be defeating the "dead fan shutdown" and battery backup feature. OR. Does anyone have a written procedure for troubleshooting the backplane, specifically the SC260m triac, the opto isolator, the 2n6531 transistor and what causes the 47 ohm resistor to burn. With all boards removed I know how to defeat the removal of the two G8018's and on a good backplane by adding a jumper between two pins on the G8018 connectors. I can apply 3v to a pin on the G8019 connector to get the triac to fire. But this is not enough for troubleshooting a bad backplane. All help will be greatly appreciated. Thom Melbourne Florida

14 years

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test-drb June 2010