test-drb

test-drb@ccmp.vtda.org

101090 discussions

by kelly＠catcorner.org

Does anyone have any experience with this? It is an 8 bit ISA interface card for 16-bit IDE drives. I have one running on my 1000tx. It is configured at address c8000 and irq2 (the tx can use either 2 or 5 depending on a switch). Using this, nothing quite runs. I think it is due to the strange video of the 1000tx (it is the Tandy "CGA", and gets its memory from the top of system RAM). With this card installed, and using a CP 3104 hard drive and Tandy's Dos for this computer, I have 2 32 Meg partitions. However, just about every piece of software causes the machine to lock up. If I install a WDXT-GEN board everything runs fine. However, I don't have any working st-506 interface drives. Any tips or suggestions? Kelly No virus found in this outgoing message. Checked by AVG. Version: 7.5.519 / Virus Database: 269.21.7/1332 - Release Date: 3/17/2008 10:48 AM

18 years

Decmate

by djg＠pdp8.net

>I picked up a vt78, precursor to the Decmate, 10 years ago for the same >amount! >It is configured for WPS but apparently you can tweak it to run the OS. >Anybody know how? > On mine I can put in an OS78 disk to boot its version of OS/8 or WPS to boot WPS, no changes needed. Their were various rom packs that go on the back. I don't know if some would make it only run WPS. >Is there software available for it? I thought I saw a reference to Basic >being available for the vt78. > The standard OS78 has basic on it. See the os78 images on this page. http://www.pdp8online.com/images/images/os8.shtml Do you have anything that can write standard single density 8" disks?

18 years

Pantone or RAL reference for the blue color of the IMSAI 8080 cover

by sellam＠vintagetech.com

Bill Sudbrink wrote: > Sellam Ismail wrote: > > > Wasn't the IMSAI case (and many others of the same era) powder-coated? > Didn't you have one fully restored (including repainted) as a prize at > an early VCF? Yes, at VCF 2.0 we gave away a prettied-up IMSAI 8080. My friend (who owns http://www.trimapintl.com) powder-coated the enclosure for me. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

18 years

Decmate

by shumaker＠att.net

A question for the list at large: I've an opportunity to acquire a Decmate - apparently a Decmate I - with terminal, keyboard ("missing a couple keys") and "drives". Unit "boots, but not sure what else it does" according to the owner. Photo shows a VT100 w/kybr on top of a large housing that apparently houses the drives. Owner agreed to $50.. Online info seems to indicate it's an early Dec PDP8 based word processor but little else seems available to a cursory search (haven't hit bitsavers yet) Worth saving? collectible? I've not delved into DEC before - is this a place to start? s shumaker

18 years

Pantone or RAL reference for the blue color of the IMSAI 8080 cover

by sellam＠vintagetech.com

Wasn't the IMSAI case (and many others of the same era) powder-coated? -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

18 years

End of restoration of the early French computer SEREL ODP-505 (germanium CPU)

by roger.holmes＠microspot.co.uk

On 16 Mar, 2008, at 17:52, cctalk-request at classiccmp.org wrote: > It is difficult for me to give a precise date. I don't have any > manufacturing notes/schematics about this machine. Published > computer lists > indicate 1965. But they don't know my work. It seems that the > machine began > a military career, before a commercial one. (My machine has a military > color, and a customs seal)And I think that the 1965 date is only for > commercial use (not reserved to military).Date codes on PCBs range > from 1962 > to 1964. It's why I think 1964. But the machine was used for > manufacturing > problems debugging / ECN. 1964 may be the date of the last ECN... > So the > date is between 1962 and 1965. Thank. I presume ECN means PCB = Printed Circuit Board. > |It is tiny compared with my Germanium machine > (ICT 1301) which weighs > |five tons. It has the same clock speed but is quite a bit slower, so > |I guess it is earlier than mine. But maybe the emphasis of the design > |was miniaturisation and the designers traded speed for size. > | I should have made it clear that it is the 1301 which is the faster of the two. For example a 48 bit decimal (i.e. 12 digits) add to / subtract from a register takes 21 microseconds. > > What is the manufacturing date of your ICT 1301? Actually I have two. Serial number 6 was the first one to be sold and was installed in 1962 and it is this one which is assembled and works, though not all the peripherals are functional. Serial number 75 I would guess was made in 1963. I have a few parts of serial number 155, which I would think would be from 1965 when the machines were largely replaced by the ICT 1900 series. Designing of the machines was started in the late 1950s, and many of the engineering drawings have initial revisions from that period. The architecture of your machine reminds me of the first machine I was allowed to operate. It was an 18 bit binary machine, it had 8k of memory built in, expandable with external modules and was made by the Airborne Computing Division (ACD) of Elliotts, it was an Elliott 920B and was a compact, flyable version of the commercial Elliott 903. There had been an earlier model 920A which I think would have been Germanium and was roughly the size and shape of a carpenters work bench. This may have been contemporary with your earlier machine I think. Unfortunately I never saw one in the flesh, but there was a bench in the computer room which I found out later, was the empty chassis of a 920A. Behind the bench was a large panel full of electrical 'chocolate strip' connectors where the analogue and digital input and output signals of the 920A could be connected up. Apparently some of the analogue outputs had been connected up to an oscilloscope to provide a visual display unit, though it used a fair bit of processor time to keep it refreshed, even with the long persistence phosphor of an oscilloscope. The panel had been covered with board with pegs to hold mylar paper tapes and until the day it was scrapped I had not seen what was behind it. > I have a > earlier machine from the same company SEREL, named OA-1001. Built in > 1959/1960.I need to restore it. It lays on the floor (horizontal > position)... The blue one > here:http://pichotjm.free.fr/Serel/Photos/Photos.htmlI will start > restoring > next month (with the Sun!) What is involved in the restoration? Do you intend to make it work, this would be very hard without the schematics. Roger.

18 years

Pantone or RAL reference for the blue color of the IMSAI 8080 cover

by c_habib＠bluewin.ch

Hello does someone of us know the pantone or RAL reference of the blue paint on the IMSAI 8080 cover? I want to repaint mine but i don't find the exact reference of this blue. Many thanks in advance Charles

18 years

PDP 11/93 + RSX 11M

by gomesh＠uol.com.br

Dear Sir, I?m in trouble with the system as the boot stops at : RSX-11M - Plus V4.3 BL66 2044.KW System "Pt/Ps" > RED DU:=SY: when loading from RD53 (RZ 28M-E) and stops at: RSX-11M/RSX-11M Plus Standalone Copy System V03 when loading from RX33 (Brusys floppy) Do you have an idea why the boot does not go on? Thanks in advance, Henrique Gomes.

18 years, 1 month

UARTs (was: Switch settings: Facit 4070 tape punch)

by dm561＠torfree.net

Date: Sat, 15 Mar 2008 13:06:36 -0700 From: dwight elvey <dkelvey at hotmail.com> Subject: RE: UARTs (was: Switch settings: Facit 4070 tape punch) >> According to the Marketing Memo from GI announcing the discontinuation >> of the AY-5-1013, the -A replacement is identical except for the higher max >> baud rate (in fact, it is a 5-1013 that has been tested to 40kb instead of 30). >Hi > For AY-5-1013 to AY-5-1013A, I reference the table on page ten of the document. > I don't disagree with the maximum rates but the table does show different stop bits. > For most users, of old systems, 1200 or 9600 was maximum so the top rate of > the part is of no special value. > Dwight Not to belabour the issue, but since cross-references are notorious for their inaccuracies I think I'll go by GI's AY-5-1013/A datasheet, especially since they made a point of issuing a bulletin to their customers assuring them that the 5-1013A was in fact a 5-1013 selected for the higher baud rate. Also notice that this part was marked on your cross-reference with a note to consult the factory for detailed interchangeability information. Other cross-references list these SMC equivalents: AY-5-1013 COM2502 AY-5-1013A COM2502H (not 2017) And it makes more sense that the same number with a different suffix would indeed be the identical part with a different speed. (e.g. http://tvservice.org/components/CROSSREF.PDF) Finally, GI part numbers are easily confused. As an example, if you want to look at the AY-5-1013A data sheet to convince yourself that it is indeed a 1 & 2 stop bit UART, you will find it at datasheetarchive.com and alldatasheet.com, but listed as an AY-3-1013 at the former, and AY-3-1013A at the latter (neither of which, AFAIK, was ever a valid GI part number). I just wanted to set the record straight in case someone for whom it's actually relevant reads this thread some day. m

18 years, 1 month

S100 archive?

by aek＠bitsavers.org

> Does anyone recognize this archive as a mirror of other spots? most of bitsavers is in there.

18 years, 1 month

strange xtal frequencies

by Watzman＠neo.rr.com

> dwight elvey <dkelvey at hotmail.com> writes: > > >> 3.595295 MHz > > TV color crystal frequncy. > > No, that's 3.579545 MHz (or 4.43361875 MHz for PAL) -- this one's a > bit faster than the NTSC colourburst, which presumably is what makes > it unusual... 3.595295 MHz is the color burst frequency (3,579,545) plus, EXACTLY, 15,750 (the horizontal scan rate). This crystal is used to produce a "rainbow" (normally a "gated rainbow") color test display. Going from left to right it continuously changes color through all 360 degrees of the color burst. [I'm kind of surprised that it's CB+15,760 instead of CB+15,764 ... the horizontal scan frequency for COLOR is bumped up slightly from 15,750 to 15,764].

18 years, 1 month

Tandy TRS-80 Model 4

by kelly＠catcorner.org

> Any words of advise before I crack the case open and void the warranty? > Be careful of the tube neck when taking off or putting back the top of the shell. I've broken one myself. I think I have ONE more spare, but I'm hanging on to it. The CRT is fastened to the top shell, and it is precariously close to the main board and mountings in the back. Kelly No virus found in this outgoing message. Checked by AVG. Version: 7.5.519 / Virus Database: 269.21.7/1329 - Release Date: 3/14/2008 12:33 PM

18 years, 1 month

Manuals and other data

by rtellason＠verizon.net

I have put together a web page listing some service manuals and other literature that I'm looking to part with, here: http://mysite.verizon.net/rtellason/manuals.html More will be added as I get the chance, but that's a large part of it. Feel free to contact me via email if you have any questions. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

18 years, 1 month

IBM 5140 is it considered a Classic

by evan＠snarc.net

>>> Is a IBM 5140 considered a Classic. Assuming that you mean "is it considered on-topic," then, yes. The 5140 "Convertible" (1984) was IBM's first laptop and is a nice example of creative engineering from the early days of laptops overall. I met the person who designed it. One if these days I'll get around to interviewing him...

18 years, 1 month

IBM 5140 is it considered a Classic

by trebor72＠execpc.com

Is a IBM 5140 considered a Classic. I have one but one of the floppy drives is flacky. Got to find a replacement. I also seem to have mis-placed the Wall Wart. Not sure what the Voltage should be. TIA Bob in Wisconsin

18 years, 1 month

IBM 3088 - Dummy questions

by gerold.pauler＠gmx.net

Hello IBM folks, as an absolute (IBM) mainframe dummy I would like to know what an IBM 3088 was used for? I don't know anything about mainframes therefore many of the infos I found on the net don't give much meaning to me. Additional questions: Is its functionality limited to CTC? Can it be used as a standalone system, server, machine, ...? I am asking these questions because I might get hands on 3 of them and according to my contact 2 out of 3 are still NOS. So I wonder if I (as a DEC/Unix Guy) can make any use out of them. Thanks Gerold

18 years, 1 month

strange xtal frequencies

by jeffj＠panix.com

I have some strange frequency crystals and oscillators. Does anyone remember what "standard" they represent? 3.595295 MHz 13.824 MHz 18.72000 MHz

18 years, 1 month

UARTs (was: Switch settings: Facit 4070 tape punch)

by dm561＠torfree.net

>>> Difference between A and non-A is number of stop bits. >> In what way? The UARTs I am familiar with have a single pin that selects >> between either 1 or 2 stop bits (1 or 1.5 stop its if the word length is > 5 >> bits). What does the other type do? >> > -tony I my meant that the primary difference was that one could do 1.5 > stop bits while the other could do 2. There is also the differences in supply > voltages as mentioned by others. Still, as far as how they work, the data > sheet in the catalog I point to is more than I've seen in other places. > My IMSAI has the AMI chip. I recall programming it with just the pinouts. > Dwight --------- I'm afraid I have to disagree with you again, Dwight: According to the Marketing Memo from GI announcing the discontinuation of the AY-5-1013, the -A replacement is identical except for the higher max baud rate (in fact, it is a 5-1013 that has been tested to 40kb instead of 30). The AY-3-1014A (there was no 1014) and 1015 are the two UARTS that use 1 1/2 stop bits instead of 2 in 5 bit mode. Looks like this previous post of mine didn't make it, so I'll repost it here: AY-3-1014A* CMOS, 480kHz/30kb AY-3-1015* NMOS, 480kHz/30kb AY-5-1013 PMOS, 480kHz/30kb AY-5-1013A PMOS, 640kHz/40kb AY-6-1013 PMOS, 360kHz/22.5kb * = 1 1/2 Stop bits PMOS = +5 & +12V, NMOS = +5V only m

18 years, 1 month

End of restoration of the early French computer SEREL ODP-505 (germanium CPU)

by pichotjm＠free.fr

> From: "pichotjm" <pichotjm at free.fr> > > I spent my week-end to write a report on the restoration of the > early French > computer ODP-505. This computer is built with germanium transistors > and has > a core memory. |Thank you that is very interesting. | |I have looked on the 'Big List' to find the date it was first sold |but could not find it. Google only brings up pages in the French |language. Could you please give us the year? It is difficult for me to give a precise date. I don't have any manufacturing notes/schematics about this machine. Published computer lists indicate 1965. But they don't know my work. It seems that the machine began a military career, before a commercial one. (My machine has a military color, and a customs seal)And I think that the 1965 date is only for commercial use (not reserved to military).Date codes on PCBs range from 1962 to 1964. It's why I think 1964. But the machine was used for manufacturing problems debugging / ECN. 1964 may be the date of the last ECN... So the date is between 1962 and 1965.|It is tiny compared with my Germanium machine (ICT 1301) which weighs |five tons. It has the same clock speed but is quite a bit slower, so |I guess it is earlier than mine. But maybe the emphasis of the design |was miniaturisation and the designers traded speed for size. | |Roger Holmes |(Kent, England)What is the manufacturing date of your ICT 1301?I have a earlier machine from the same company SEREL, named OA-1001. Built in 1959/1960.I need to restore it. It lays on the floor (horizontal position)... The blue one here:http://pichotjm.free.fr/Serel/Photos/Photos.htmlI will start restoring next month (with the Sun!) RegardsJM PICHOT

18 years, 1 month

RSTS/E DECNET installation guides / pointers / tips?

by aek＠bitsavers.org

I just put the user's and manager's guide for DECnet/E V2 on bitsavers under http://bitsavers.org/pdf/dec/pdp11/rsts/DECnetE This was all I was able to come up with from the DEC archive at CHM.

18 years, 1 month

RSTS/E DECNET installation guides / pointers / tips?

by aek＠bitsavers.org

> I was just up in the "Stacks", and we have Volumes 1-4 http://elvira.stacken.kth.se/rstsdoc/ has most of the base RSTS/E documentation Is there any way to get the other three volumes of the DECnet material scanned?

18 years, 1 month

UARTs (was: Switch settings: Facit 4070 tape punch)

by dm561＠torfree.net

-------Original Message: Date: Thu, 13 Mar 2008 04:35:01 -0400 From: "Roy J. Tellason" <rtellason at verizon.net> Subject: Re: Switch settings: Facit 4070 tape punch On Thursday 13 March 2008 05:25, Brent Hilpert wrote: > "Roy J. Tellason" wrote: > > Anybody know who made those parts with numbers like AY-n-nnnn? I don't > > think I have much data on those offhand. > > General Instrument. Often there's a "GI" logo on their chips. Ah yes. Vague recollections were nudging me in that direction... :-) > Dennis Boone wrote: > > > > AY-5-1013 40 pin dip (cpu?) > > > > > > UART, I think. I know I've run into that number somewhere before. > > > > If the 14411 is a baud rate generator, then this must be a uart, > > especially as now that I look at the traces, the puzzling 8-pack > > switches 1-5 go right to it. > > (Yes, the AY-5-1013 is a hardware/switch/pin-configured UART. Can supply > pinout if needed.) That may be why I was recalling that number. The other one of those being what, a 6402 or similar? I'm thinking Standard Microsystems, for which I do have a databook someplace though I haven't seen it in ages. ----------Reply: Yes, those AA-N-NNNN numbers are GI; they made 6 or 7 versions of that UART, some dual-voltage PMOS and some 5V-only versions. The 6402 (Intersil, Harris etc.) was a pin-compatible 5V CMOS version. I've got a pretty complete set of GI datasheets, including their funky game chips etc. if anyone needs any info. m

18 years, 1 month

UARTs (was: Switch settings: Facit 4070 tape punch)

by cclist＠sydex.com

> Date: Thu, 13 Mar 2008 20:27:09 -0700 > From: dwight elvey > Hi > I posted this but I guess I'll post it again: > > http://www.bitsavers.org/pdf/standardMicrosystems/_dataBooks/1985_Standard > Microsystems.pdf > > AY-5-1013A = AMI S1883 = COM2017 page 91 > > AY-5-1013 = COM2502 page 91 Also WD TR1402, Signetics 2536 and TI TMS6011 IIRC, the 1013 was also used in the TV Typewriter. A very common sub for the 1013/1013a was the WD TR1602/1402. Thedifference between the 1402 and 1602 was that the 1602 can generate 1.5 stop bits; not so with the 1402. The TI TMS6011 is likewise a non-A (1 or 2, but not 1.5 stop bits) equivalent. Also the Signetics 2536. If you need a 5v only version, try the Fujitsu MB8868A or SMC COM8017 or COM8502. Same pinout and functionality. Cheers, Chuck

18 years, 1 month

Apple Scribe Printer

by Nopills2＠aol.com

But, before I get into opening it and regreasing it... I was seeing if anyone had a manual for it and can tell me what the blinking light indicates. When I turn it on, the Select Light blinks in patterns of three (three blinks, pause, three blinks, pause...). Do you still want a manual? Three blinks means there is a problem. Needs paper or print head is stuck or mosy commonly the ribbon cartridge is used up. pop the cartridge out and see if there is silver showing. If not advance the ribbon slightly and see if a silver band appears. Means you need a new ribbon. Do not try to print on the silver, willbhurt print head. **************It's Tax Time! Get tips, forms, and advice on AOL Money & Finance. (http://money.aol.com/tax?NCID=aolprf00030000000001)

18 years, 1 month

UARTs (was: Switch settings: Facit 4070 tape punch)

by dm561＠torfree.net

--------Original Message: Date: Thu, 13 Mar 2008 20:27:09 -0700 From: dwight elvey <dkelvey at hotmail.com> Subject: RE: UARTs (was: Switch settings: Facit 4070 tape punch) Hi I posted this but I guess I'll post it again: http://www.bitsavers.org/pdf/standardMicrosystems/_dataBooks/1985_StandardM… AY-5-1013A = AMI S1883 = COM2017 page 91 AY-5-1013 = COM2502 page 91 AY-5-1015A = AMI S6850 = Fairchild F6860 = Harris HM6402 = Intesil IM6402 = COM8017 page 161 AY-5-1015 = Harris HM6403 = Intersil IM6403 = COM8502 page 161 Difference between A and non-A is number of stop bits. Dwight ----------Reply: And, just to make the GI list complete: AY-3-1014A* (1) CMOS, 480kHz/30kb, AY-3-1015* (1) NMOS, 480kHz/30kb, Input pull-ups AY-5-1013 (2) PMOS, 480kHz/30kb AY-5-1013A (2) PMOS, 640kHz/40kb AY-6-1013 (2) PMOS, 360kHz/22.5kb * = 1 1/2 Stop bit capability PMOS = +5 and +12V, NMOS = +5 only Two sets of basic characteristics (1) & (2), pin compatible. m

18 years, 1 month

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