test-drb July 2004

test-drb@ccmp.vtda.org

259 participants
518 discussions

by dwight.elvey＠amd.com

>From: "John Honniball" <coredump(a)gifford.co.uk> > >Jay West wrote: >> Since the blank chips are nigh impossible to find anymore... is it possible >> to use something like a PIC chip on a small DIP carrier card, that could be >> plugged into an existing loader rom or microcode rom socket and function >> just like the "real thing" to the system? > >You wouldn't use a PIC chip for something like this. A PIC would be >used in a microcontroller-type application, where program-controlled >behaviour is required. To replace a ROM, we could simply use another >ROM (or PROM, EPROM, EEPROM, Flash ROM, etc.) with a pinout adaptor. > >People are already doing this for PROMs in mobile radios. These PROMs >are in fact the same chips as one finds in a PDP-11 for booting (M9312) >and for storing the 8008 firmware in an 11/34 console card. The >PROMs in question are 82S131, 74S571 or Am27S13 types (512x8). I have >some blanks here to fix a console card, as it happens. > >Scroll down here: > > http://www.open.org/~blenderm/syntorx/legacy.html > >to the section headed "EPROM Conversion" to read about the PROM >replacements for Syntor radios. And see this page: > > http://www.open.org/~blenderm/syntorx/legacyeprom.html > >for photos of a completed adaptor. > >Do you know the chip numbers and/or specs for the ROMs you wish to >emulate? > >-- >John Honniball >coredump(a)gifford.co.uk > Hi John Most of the applications Jay is talking about require faster than 100ns someplace. Most EPROMs just are not in that range. Dwight

20 years, 4 months

Ohio Scientific Challenger 4P/MF

by JMeyer101＠aol.com

Hello Graeme, Thank you! This should help alot. Apparently this computer uses a floppy drive. Do you happen to know where I can pick one up? Thanks again, Jeff Meyer

20 years, 4 months

Seeking Strawberry Tree or LabTech (Laboratory Technologies) software

by vcf＠siconic.com

Has anyone got any old Strawberry Tree Inc. or LabTech (Laboratory Technologies, now National Instruments) data acquisition software? I've been getting periodic requests for specific software packages from these companies and am hoping I can find some. This is a bounty so this could be worth money. Thanks! -- 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 ]

20 years, 4 months

8" floppy project

by doc＠mdrconsult.com

I'm working on a PC-based external 8" floppy drive, mostly to be able to format the 30-40 pounds of perforated placemats (aka bulk-erased RX02 disks) in my garage, and to be able to archive the few PDP-8 and Xerox systems disks, games disks, diags and source disks I have, but don't have the equipment to run. I've discussed this in pieces here, but I'm ready to try to actually put it all together. The first order of business is an interface cable for a standard ISA floppy/IDE controller. I've found this pinout: http://tinyurl.com/5c5fb but no confirmation that it actually worked with a YD-180 drive, which is what I have available. Second issue is powering the drive. YE Data's schematics say +24VDC, max 1.0A, typical 0.4A, and 5VDC, max 1.0A and typical 0.4A. However, I've also found Usenet posts claiming a peak draw of 24VDC(a)2.2A and 5VDC(a)1.7A, so I'm inclined to be generous. I'm also not at all versed in electronics, so I'm not sure what to look for past those specs. Jameco has these units: http://tinyurl.com/3lpjc PWR SPLY,SWITCH(D-60B)58W, 5V@3A,24V@1.8A,UL/TUV/CE Jameco #123465 http://tinyurl.com/4whtu PWR SPLY,SWITCH,45W,5VDC@5A, 24VDC(a)1.8A,PFC,UL/CSA/CE/TUV Jameco #194870 http://tinyurl.com/6fpp9 PWR SPLY,SWITCH,65W,5VDC@6A 24VDC(a)2.6A,PFC,UL/CSA/CE/TUV Jameco #194896 http://tinyurl.com/64rml PWR SUPPLY,SW,65W,5V/7A, 12V/3.2A,2.4V/1.5A,MIN,LOADREQ Jameco #215706 Which is most suitable for an external floppy enclosure? If "none of the above", what am I missing? At the risk of heresy, right now I don't have time to be educated in the issues; just point me in the right direction and shove, please. :) BTW, I'll be more than glad to list and share the software I have. After it's archived, I'll be looking to give away the disks I can't use, or trade them for blanks. Thanks, Doc

20 years, 4 months

Fw: Insect Conductivity - language?

by geoffreythomas＠onetel.com

----- Original Message ----- From: "Geoffrey Thomas" <geoffreythomas(a)onetel.com> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org> Sent: Tuesday, July 27, 2004 8:36 PM Subject: Re: Insect Conductivity - language? > Me , I want to know what the ants said in reply. Translation anyone - > looking for a babel fish......... > I was up on the scaffolding outside my house today (we're having some > cladding fitted ) fitting up my uhf aerial in a higher position when a > squadron of flying ants descended on everything - from the park at the back > of the house. I'm afraid I outdid Sellam , and ,statistically speaking , you > wouldn't expect that many ants to be illegitimate. They wouldn't go away so > I had to come inside , it's a bit dangerous when you're up high and ants are > exploring every part of your anatomy ; I've just had a shower and two came > out of my hair- silly little buggers. > What's this got to do with fucking computers anyway ? ................... > Geoff. > Having decided to enter the debate I thought I might try out a bit of allusion alongside an expletive - as above . I must say that I find it distinctly uncomfortable to see the last line in print. I think I belong to the school that believes that swearing is an art form ( not ark B ) and if it is used indiscriminately it loses it's impact. I think this is true of most things in life . I find that the allusion is a lot funnier as , obviously, it leaves the reader to visualise the word and the "scene" for him/her/self. (P.C.)This is a bit like radio as opposed to tv , I suppose. Swearing , in a conversational context, is probably easier to get away with as you have inflexion, intonation etc. to convey meaning and any humour. This is why it looks so bad in print , I think. I thought the beginning of " Four weddings and a funeral " was poor in this respect -poor acting?- but perhaps it's a generation gap effect. I certainly have no objections to anyone writing such in an email , I merely express my own mild discomfort at seeing my own word in print. I don't believe in any form of organised religion with a deity , in case anyone is wondering. The only person I know who has a magic wand is Sooty ! Izzy Wizzy ..................... Geoff.

20 years, 4 months

VCF East Pictures

by wayne.smith＠charter.net

I have posted a smattering of pictures from the first day of VCF East here - http://home.comcast.net/~msmith6020/VCF.html. I had to leave mid-afternoon on Friday and wasn't able to get a clear shot of every exhibit due to the crowd. -W

20 years, 4 months

CCTALK/CCTECH archives

by vcf＠siconic.com

I found a great place that has archives of many various mailing lists, including CCTALK and CCTECH: http://archive.netbsd.se/ Seems to be duplicates of what's on ClassicCmp.org, but the interface seems nicer. Doesn't ANYONE have archives going back to the beginning? Whatever happened to the old archives? They were so nice... -- 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 ]

20 years, 4 months

a classiccmp electronics project?

by dwight.elvey＠amd.com

>From: vrs <vrs(a)msn.com> > >> OK. I was thinking about the microcode ROMs in an HP9810 (somethign that >> _I_ am working on, and those are most certainly 'hit' as soon as INIT is >> deaseserted and the microocde program counter starts to change. I prefer >> to think of general-purpose solutions (i.e. somethign that will replace >> every 256*4 ROM), rather than soemthing that works only in specific >> machines under specific circumstances. > >I must not be getting it, somehow. > >Why can't you just use a 45ns or 55ns 27c256 or 27c512 and swizzle the >pinout? These are around $3 per chip, and seem to meet the requirements. > > Vince > > Hi I did some searching on the web but never found any 27c256's faster than 70ns. I did find 27c512's and 27c010's at 45ns a couple of places. Dwight

20 years, 4 months

More HP microcode & loader rom detective work

by dwight.elvey＠amd.com

>From: "Jay West" <jwest(a)classiccmp.org> > ---snip--- > >And lastly, I'm confused about FFP. I am guessing that FFP required FP, >which is supposed to be standard on E series. But a few lines in various >docs make me think that perhaps older rev E series didn't have FP built in. >Some docs mention that when ordering FFP, you can specify option -100 to get >some additional roms, necessary for E series machines with a serial number >less than 21XX (co-incidence on the rev number). I'm guessing that the >additional roms are FP? The roms in question are: Hi again My understanding is that for the E series, the only difference between the E and the F is the additional firmware ROMs. My understanding is that you'd need the ROM expansion board. I hope you are going to make some binary files of all these ROMs. Maybe Al can make a directory to hold ROM images. Dwight

20 years, 4 months

More HP microcode & loader rom detective work

by dwight.elvey＠amd.com

>From: "Bob Shannon" <bshannon(a)tiac.net> > > > >Jay West wrote: > >><snip> >> >>1816-0420 No clue >> > >Paper tape. This is the 'fastest' easy way to bootstrap an HP 1000. > >Use this with a 12566 microcircuit I/O board, and you can load a 31K word >boot image in less than 2 seconds, faster than many stock HP disk drives. What data source are you using? I was thinking of connecting this board to the parallel port of my PC to make the PC look like an external drive. Dwight > >Use this boot rom with the emulator I'm building for you. I'll supply a >cable and jumper settings for the I/O card (gnd true). > >

20 years, 4 months

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test-drb July 2004