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

by maxeskin＠hotmail.com

I tried scraping, I scraped so much that I scraped throuh to the white part of the PCB. It still conducts. I can't see any solder bridge, but plugging it in causes smoke to emanate from the cable. >I would try a piece of cotton string. Heat the solder until the bridge is >molten, then dip the cotton string in it. It will soak up the molten lead. > >Once you get most of the bridge soaked up, scrape between the pins with an >exacto knife to be certain. >-- >Jim Strickland >jim(a)calico.litterbox.com >----------------------------------------------------------------------- >Vote Meadocrat! Bill and Opus in 2000 - Who ELSE is there? >----------------------------------------------------------------------- > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 12 months

1
0
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Near disaster and questions on finds

by allisonp＠world.std.com

< better. Plywood is probably not the best shelving material; I don't < know much about this stuff, but wouldn't solid wood be stronger? No. Plywood is laminated wood veneers and has a strength that exceeds solid boards of the same dimension. It also has the advantage of oriented grain for each layer and available with finished surfaces. A cheaper material is OSB, oriented strandboard the high strength upper class cousin of flake board. The idea of glued up (laminated) woods is quite old and has always been used where strength is a primary concern. It can be used to get grain and layers that have differing color as well. Very strong shelves can be made up using 1x3 stock and plywood combined with 2x4 or 2x6 uprights. The problem is good quality wood has gotten expensive. Allison

27 years, 12 months

1
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FW: PDP boot problems

by Anthony.Dellett＠Staples.com

> -----Original Message----- > From: 'joant(a)cadence.com' [mailto:joant@Cadence.COM] > Sent: Friday, July 31, 1998 2:11 PM > To: Dellett, Anthony > Subject: Re: PDP boot problems > > > Thus spake Allison: > > I have both S100 systems and PDP-11s so I can be a translator and > > relationship mediator...;) > > Thanks, Allison :) > > > MXV21??? do you mean RXV21? > > Yes, I do. My mistake. Tony called CRDS and confirmed that it's > supposed to be a drop-in replacement. > > > Also in PDP-11s interrupts are "shared", actually daisy chained via > > request grant on the backplane. if the cards are not in sequencial > > slots in the grant chain then things don't work. > > Will confirm this. What happens if the cards are placed as: > > M8186 MXV11 > RXV21 > > I'm guessing this won't work, but it was one of the alternate > orderings > I had been using. I can't remember well enough as to how the > backplane > was wired...though I do remember that if you're going to skip > slots, you > need to use teeny bus grant continuity cards :) (That's for > a later date.) > > > the tests work if... all them jumpers on the MXV11s are correct. > > Shoot. I was afraid of this. I'm going to have to rip all of the > jumpers out that are non-standard and start over again. > > > ODT runs without interrutps so it can only mean that the > > console addresses > > are real but the interrupts may be wrong. > > Verification of the interrupt jumpers showed them to be at the > correct addresses when I checked this morning, but I'll double-check > tonight (under a BRIGHT lamp with my VOM) and verify them. > > > Thost can contain one of four groups of software, DEC rom ODT > > and boots, > > Customer programs, DIAGnostics or CRD ODT/boot code. > > Right. I'm pretty sure that ONE of these cards as the correct loader > for the FC202, but I've lost track as to which is which. I'll pull > the PROMs for the time being, and will eventually read them in on > my PROM programmer to figure out what the hell they do. > > > The bus config is unlikely a problem, the MXV11 addessing for > > ram can be. > > Again, the config was set to Ram bank 0 last I checked on > this particular > card, but I can't be 100% sure. I'll check first thing when > I get home... > > Thanks for your help, Allison! I now know where to focus my efforts. > > -Joan > -- > - Joan Sarah Touzet | So grey is not the color I > expected - > - joant(a)cadence.com | On someone who's so often > touched by grace - > - joyce.eng.yale.edu/~joant| But always she's the spectre of > uncertainty - > - I still love OS/2. | I first endured, then faded, > then embraced... - >

27 years, 12 months

1
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Dead keys on C64

by Anthony.Dellett＠Staples.com

If you suspect it's a dead keyboard, I can prolly be talked into sending you one of my spares. > > Problem: I just noticed the C64 seems to have these > dead keys '5, 7, 9, > >and 0'. Looks to me like a dead bit on the keyboard > controller, but I must > >confess to ignorance on the internal details of how the C64 > accepts key > >presses. Can anyone give an overview, and would anyone know > of a fix? > > >

27 years, 12 months

3
2
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PDP Boot Loader

by Anthony.Dellett＠Staples.com

Here's more info on the PDP boot problem. Since my girlfriend knows more about it than I do, I'll let her explain :). Tony > -----Original Message----- > From: Joan Sarah Touzet [mailto:joant@Cadence.COM] > Sent: Friday, July 31, 1998 9:27 AM > To: anthony.dellett(a)staples.com > Subject: Forward for your mailing list > > > Hi everyone! > > I'm sorry for my boyfriend's post lacking details on my PDP > setup; he's > not familiar with these systems, and was hoping there was a simple > answer (and a simple configuration!) for dead PDP-11/23s. > Unfortunately, no such thing ever exists... ;) (So I'm the QBus > person, and he's the S-100 bus person. You can imagine the fights we > have over dinner.) > > Anyway, all joking aside, this is a PDP-11/23 system. It's installed > in a Charles River Data Systems backplane & enclosure, which > contains 2 > 8" drives which I believe are double sided. (I'll open the case this > weekend to confirm, and to CLEAN!) The system has been stripped down > to only the essential modules: a KDF-11A (PDP-11/23 CPU with FPU > installed, M8186), an MXV-11 multifunction serial/32K memory card with > local refresh (M8047-CA), and a Charles River Data Systems > FC-202 drive > controller board. I currently have the backplane configured as such: > > M8186 > M8047 > FC202 > > With no documentation on the FC202, it's hard to know whether it is > trying to share an interrupt with the M8047, but I've been told it's a > dropin replacement for the MXV21, so I've placed it as such. FYI, the > backplane is quad high, with 8 rows of slots. > > I have been trying to boot RT-11SJ v5 from drive 0 using the RX02 > single and double density bootloaders, as well as the RX01 bootloader > on the off-chance that these are single-sided drives. One of two > things happens: > > 1) After RS/340, R7/1000, P the run light comes on, drive 0's busy > light comes on > (and it sounds like it seeks to Track 0) but the system hangs > there. In this > case, the RUN light stays lit until I send BREAK or front-panel > toggle from ENBL > to HLT. This happens in less than 1/2 a second. I don't hear > any additional > seeking from the drive. > > 2) After RS/340, R7/1000, P the run light comes on momentarily, > drive 0's busy > light comes on (and seeks to Track 0), the run light > extinguishes, and I'm > dumped to ODT somewhere around 1104. (The address can vary.) > This happens in > less than 1/2 a second. > > I am unconvinced that the drive is actually returning a media error > this quickly. I've also let the system sit in state 1 for the > approximate time I remember it took these systems to boot (30 > seconds? > It's been 18 years...) but no kumquat. > > I've also entered some of the diagnostic programs I've found in the > Microcomputer & Memories books I've got floating around (1981, 1982 > editions). Most of the tests pass. The ones that don't are > tests like > the "continuous stream of ASCII characters to the console prompt" and > the "press a key, create an interrupt, and halt the program" ones. > After trying multiple CPU and MXV11-CA modules, and still seeing the > same erroneous behavior, I'm beginning to suspect that those programs > don't quite work as indicated. I haven't gathered up the gumption to > bother debugging them by hand yet. > > Oh, and in case you're wondering, I have the CPU module jumpered to > power-on into ODT, and the MXV11-A module is pretty much at > the factory > defaults. Some of the MXV11-As that I have, have boot PROMs installed > in them, and so the PROM address jumpers may be different than those > listed as factory defaults, but everything else is "by the book." > > One final note -- this system and enclosure were working a few years > ago in an expanded configuration (with 3rd party memory add-on modules > I've since removed, as well as a bunch of Analog Devices-powered A/D > boards, and an RGB Peritek video board) so I'm pretty sure > that the bus > is configured for a /23 already, instead of for an LSI/2 or something. > > Any ideas? My current plans for the weekend involve taking the > enclosure apart and cleaning the drives within an inch of their lives, > then trying to boot again using the RX02 bootloaders. I'm starting to > run out of ideas. > > -Joan Touzet (go ahead and reply to the list, I can read it just fine > through the archives page :P ) > --- > - Joan Sarah Touzet | So grey is not the color I > expected - > - joant(a)cadence.com | On someone who's so often > touched by grace - > - joyce.eng.yale.edu/~joant| But always she's the spectre of > uncertainty - > - I still love OS/2. | I first endured, then faded, > then embraced... - > >

27 years, 12 months

2
1
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toshiba T3100/20 20mb RLL HDD

by sinasohn＠ricochet.net

At 11:15 AM 7/29/98 -0700, you wrote: >> 3.5" 20MB Hard Disk Drive (T3100/20) >> JVC : JD3824ROTO >> Number of heads: 4 >> Number of cylinders: 612 > >Roger, those numbers don't sound right. At the very least, that should >be a 30mb drive. But with the number of sectors that they are packing >onto a disk these days, it would doubtless be much higher. Wasn't that the same number of heads & cylinders as an ST-225? But that was MFM and this is "2-7 RLL", so I think you're right, RLL oughta give you 30mb... But, that's straight from Toshiba's specs file for the T3100 & T3100/20. --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

27 years, 12 months

4
4
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#%&*! This compaq is cursed! (ot)

by maxeskin＠hotmail.com

OK, this isn't even funny anymore. I replaced the keyboard, and the thing works fine. The problem is that the cable leading to the display was damaged, and the backlight ceased to work. So, I decided to bypass the cable (only one trace). This was fine, but I tried to solder the wire I was using directly to a pin of the surface-mounted ribbon cable connector (the output, that connects to the circuit board inside the display panel). Of course, i bridged four of the pins. I have no desoldering tools of any kind, but I doubt it would help much. The solder got into little crevices between the pins and onto the circuit board itself. I guess this board is non-essential, but is there any way I could un-bridge this stuff? ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 12 months

3
2
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Near disaster and questions on finds

by sinasohn＠ricochet.net

At 10:12 PM 7/30/98 -0700, you wrote about Pereos Tapes: >I was in Tokyo recently and saw a store selling the (Sony) cartridges >(about the size of a quarter) for about 1600 yen (around $14 at the [...] >Alas, I don't remember the store, but it was one of the seven-floor >monsters in central Akihabara. Ah well, since it was only yesterday that I was finally sure I'd be able to go to Denver on holiday, Tokyo is a pipe dream for me... (like England, Southern Africa, etc. <sigh>) But, all is not lost. I found a guy who has a few; I'm getting 5 for $25 plus shipping. Thanks! --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

27 years, 12 months

1
0
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Near disaster and questions on finds

by roblwill＠usaor.net

just cement the blocks together.... ---------- > From: Russ Blakeman <rhblake(a)bbtel.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: Near disaster and questions on finds > Date: Friday, July 31, 1998 12:04 PM > > In the case of the original inquiry, I think mother nature moves them for him, > whether he wants them moved or not. Needs something for the San Fran climate... > > Jason Willgruber wrote: > > > Here's how I store my "stuff": I keep my collection in my basement, so I > > have made shelves out of cement blocks and 2x4's (like the outdoor flower > > displays at WalMart), and then I put 1/2" plywood on top of the 2x4's and > > screw it down with drywall screws. > > If you feel that you need extra strength, you can lay the 2x4's on edge, > > and then screw the plywood on. Yes, this method may be a bit heavy, but > > how often are you going to move them? > > -- > > -Jason > > (roblwill(a)usaor.net) > > ICQ#-1730318 > > > > ---------- > > > From: Charles E. Fox <foxvideo(a)wincom.net> > > > To: Discussion re-collecting of classic computers > > <classiccmp(a)u.washington.edu> > > > Subject: Re: Near disaster and questions on finds > > > Date: Friday, July 31, 1998 8:34 AM > > > > > > At 04:25 PM 7/29/98 -0700, you wrote: > > > >The other day I was mucking around in the room I store most (some, > > > >according to my girlfriend 8^) of my collection, and all of a sudden one > > of > > > >the shelves holding a bunch of Toshibas, collapsed. Luckily, I was > > there > > > >and was able to keep them from crashing to the floor, but still... > > > > > > > >Upon closer inspection, it looks like the shelf with (some of) the > > GRiD's > > > >is about ready to go as well. These are those metal shelves you get at > > > >Target for $8 on sale. > > > > > > > >So, I guess my question is, how to others store their collection? Keep > > in > > > >mind that I'm in San Francisco, and that Earthquakes are an issue. > > Thanks! > > > > > > > > > > > > -- > > -------------------------------------------------------------------- > Russ Blakeman > RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144 > Phone: (502) 756-1749 Data/Fax:(502) 756-6991 > Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com > Website: http://members.tripod.com/~RHBLAKE/ > ICQ UIN #1714857 > AOL Instant Messenger "RHBLAKEMAN" > * Parts/Service/Upgrades and more for MOST Computers* > -------------------------------------------------------------------- > >

27 years, 12 months

1
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Near disaster and questions on finds

by roblwill＠usaor.net

Here's how I store my "stuff": I keep my collection in my basement, so I have made shelves out of cement blocks and 2x4's (like the outdoor flower displays at WalMart), and then I put 1/2" plywood on top of the 2x4's and screw it down with drywall screws. If you feel that you need extra strength, you can lay the 2x4's on edge, and then screw the plywood on. Yes, this method may be a bit heavy, but how often are you going to move them? -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 ---------- > From: Charles E. Fox <foxvideo(a)wincom.net> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: Near disaster and questions on finds > Date: Friday, July 31, 1998 8:34 AM > > At 04:25 PM 7/29/98 -0700, you wrote: > >The other day I was mucking around in the room I store most (some, > >according to my girlfriend 8^) of my collection, and all of a sudden one of > >the shelves holding a bunch of Toshibas, collapsed. Luckily, I was there > >and was able to keep them from crashing to the floor, but still... > > > >Upon closer inspection, it looks like the shelf with (some of) the GRiD's > >is about ready to go as well. These are those metal shelves you get at > >Target for $8 on sale. > > > >So, I guess my question is, how to others store their collection? Keep in > >mind that I'm in San Francisco, and that Earthquakes are an issue. Thanks! > > > >

27 years, 12 months

2
1
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WANTED>>>

by roblwill＠usaor.net

Hello. I am looking for a Tandy 2800HD Laptop. Just the plain 2800 with the EGA display. I am willing to trade either a 14" color EGA, 14" color VGA, or 14" color XGA monitor for it. The VGA and EGA monitors will come with a video board. The XGA works with the XGA/2 video adapter for a PS/2. I am also looking for old laptop cases - the big kind that a Tandy 1400 will fit in. ThAnX, -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 PS>>If anyone wants to make me an offer for the monitors, I am willing to sell them for the right price.

27 years, 12 months

1
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Toshiba T3100/20/Tadny 1400 HD

by roblwill＠usaor.net

Hi. I have two WANG WLTC laptops, two Tandy 1400HD's, and I used to have a Toshiba T3100/20 and a T1200. They all had the same type of HD connector. The Tandy's have 20MB ALPS drives, and the WANG's have 10MB JVC drives, and the Toshiba's had 20MB JVC drives. I have NEVER been able to find replacement drives with this same connector. It's a 26 pin connector. Even though I don't need them, I'd like to have a few spares. ThAnX, -- -Jason (roblwill(a)usaor.net) ICQ#-1730318

27 years, 12 months

1
0
0 0

ZX-81 custom chip - watizit?

by franke＠sbs.de

> I just got a ZX-81 kit (unassembled). I didn't know this before, but the ZX > uses a custom 40-pin IC to perform certain I/O functions. Is this chip truly > "custom" or is it a relabeled Z80 support chip? Yes, it is. Or better it is a semi cusom chip - like ASICs today. The Basic design is a standard compilation of TTL functions, only the last metal layer is custom. This was an early attempt by some chip manufacturers to cut design costs - only this last layer had to be designed for every customer. The technic was(is) called ULA Unassigned(?) Logic Array. And thats also the name used by ZX-fans for this Chip. The ULA replaces something like 15 or 20 standard TTL bugs from the ZX-80 design - the 81 is just a ZX-80 II :) Gruss H. P.S.: Don't assemble it ... I assembled 5 kits several years ago - and now I could cry for one :( -- Ich denke, also bin ich, also gut HRK

27 years, 12 months

1
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Looking for S-100 Systems

by Anthony.Dellett＠Staples.com

Definately. I have seen you on the classicmp mailing list. Sorry about sounding like a bonehead with the PDP/11 boot problem. It's not my bag. Tony Dellett -- On Tue, 21 Jul 1998 12:48:56 Tim Shoppa wrote: >In article <6p2mi9$1jg$1(a)nnrp1.dejanews.com> you write: >>I'm looking for a few old S-100 systems from my old high school days. >>Specifically: >> >>Cromemco S-100 systems (Z2 mostly) > >I have a Z2 and several Z3 systems, all located in Bethesda MD. >Interested? > >Tim. (shoppa(a)triumf.ca) (301-767-5917) >

27 years, 12 months

1
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Dead keys on C64

by roblwill＠usaor.net

> > Problem: I just noticed the C64 seems to have these dead keys '5, 7, 9, > > and 0'. Looks to me like a dead bit on the keyboard controller, but I must > > confess to ignorance on the internal details of how the C64 accepts key > > presses. Can anyone give an overview, and would anyone know of a fix? How long was the C64 sitting in the basement? It could be that the key contacts are corroded. It happened to me once on a TRS-80. The key wouldn't type, but if I'd pound on it for a while, it would type, but then keep typing until I pounded it again. I took the keyboard apart, took the cap off of the key, and then cleaned the contacts with alcohol. It worked fine after that. It doesn't sound like it would be bad, since if something was dead, probably the whole top line wouldn't work - or at least more than 4 keys. GooD LucK, -- -Jason (roblwill(a)usaor.net) ICQ#-1730318

27 years, 12 months

1
0
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Rare Tandy 1400???

by roblwill＠usaor.net

That's what I figured. Not worth any more than I paid for it? Hmm... That makes it worth absolutely nothing :-). Oh well, guess I'll just use it as soon as I get the power supply fixed. -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 ---------- > From: Sam Ismail <dastar(a)ncal.verio.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: Rare Tandy 1400??? > Date: Friday, July 31, 1998 2:18 AM > > It's probably not rare, and not worth any more than what you paid for it. > > I hope this answers your question. > > Sam Alternate e-mail: dastar(a)siconic.com > ---------------------------------------------------------------------------- --- > Ever onward. > > September 26 & 27...Vintage Computer Festival 2 > See http://www.siconic.com/vcf for details! > [Last web page update: 07/26/98] >

27 years, 12 months

1
0
0 0

Atari Joystick Connector

by jsalzman＠hersheys.com

Digi-Key has them. Part number: A2096-ND Go to http://www.digikey.com and do a Part Search for the above part number. Just make sure the mount spacing between the connector back edge and the solder pins on the Atari port is the same as in the Digi-Key specs. Anything different could cost a lot more for a replacement connector with a non-standard mount spacing. The sample PDF page of the catalog entry is available online. Pictures and details of the part are available there. You need Acrobat reader to view the catalog page. Jeff Salzman >prefer a broken one as ripping up a working machine is just wrong. All I >really need is a player1 Joystick port, and I haven't had any luck finding >a 90-degree DB9 port...

27 years, 12 months

1
0
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Wierd Stuff web site?

by Anthony.Dellett＠Staples.com

Yes, they have a website, the only thing it's good for really is directions to the store and a phone number. http://www.weirdstuff.com/ Tony > -----Original Message----- > From: Richard A. Cini, Jr. [mailto:rcini@email.msn.com] > Sent: Thursday, July 30, 1998 6:17 PM > To: Discussion re-collecting of classic computers > Subject: Wierd Stuff web site? > > > Does Wierd Stuff Warehouse in Sunnyvale have a web site? How > about a phone# > (the one that I have "...has been disconnecte.")? > > > > Rich Cini/WUGNET <nospam_rcini(a)msn.com> > - ClubWin/CW6 > - MCP Windows 95/Windows Networking > - Preserver of "classic" computers > <<<< ========== reply separator ========== >>>>> > > >

27 years, 12 months

1
0
0 0

Zenith Data Systems laptop

by manney＠lrbcg.com

I was just given a Mac, which doesn't seem to have a hard drive or software. Does anyone have an O/S he (she) would wish to get rid of cheap(ly), plus an app or two? I'm presuming my DOS 3.3 won't work. <g> Thanks, manney(a)lrbcg.com "2+2=5 for sufficiently large values of 2"

27 years, 12 months

10
11
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Dead keys on C64

by franke＠sbs.de

> Well I landed an amazing C64 software score, with boxed sets of Ultima I, > all the Zork series, Neuromancer, an editor assembler package, a koala pad, a > bunch of joysticks, and a bunch of other stuff I can't remember. The boxes and > manuals are in almost _pristine_ condition! Didn't pay a dime... one of the > guys I work with was amazed that I liked this stuff and pulled it out of his > basement to give to me for a beer. Well, OK; I paid a beer. ;-) Ooooh expensive :) > Problem: I just noticed the C64 seems to have these dead keys '5, 7, 9, > and 0'. Looks to me like a dead bit on the keyboard controller, but I must > confess to ignorance on the internal details of how the C64 accepts key > presses. Can anyone give an overview, and would anyone know of a fix? Hmm if it is only about this keys, it cant be a dead line. But for C64 it is still about to throw the unit away - (I just hauled 12 C64 from a school today) they are $5 thingis. Or store it as spare part (and they are worth about USD 50 as replacement parts). I wouls sugest a rapair only if it is about a special unti of personal history/interest. Gruss H. -- Ich denke, also bin ich, also gut HRK

27 years, 12 months

1
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m88k info

by JRichardson＠softwright.co.uk

>> I was at a computer junk store the other day and saw a long flat >> computer case/box; about 3 inches high, about 18 wide and 10 long. It >> was some sort of unix terminal/system/something, because it still had a >> label with the network host name etc on it. >> >> BUT- >> >> it said m88k on it! hmm, sounds like the exact size of an Xterminal that I have somewhere that uses an '88k CPU. Let me know if you grab it an get it working, >from what I remember if it's the same as mine it needs boot images on the server off which it hangs in order to run - the ROMs only have enough info to boot the network system. If it is the same machine, it'll take standard 72 pin SIMMS and an IBM PC keyboard (with a PS/2 style connector). Memory's hazy, but I think it had a custom 15-pin connector at the back, but it threw out standard frequencies that could be used with a Sun workstation monitor... I did find some info on the web for the box, it's possible I have it at home - just give me a shout... As for things using '88k's, My old Tektronix XD88 Unix box also used one as it's main CPU. I think they're supposed to be a lot better chips than 68k's, just that they never really caught on - 68k's were too well established (and therefore a lot cheaper). cheers Jules >

27 years, 12 months

1
0
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ZX-81 custom chip - watizit?

by pete＠dunnington.u-net.com

On Jul 30, 21:54, Richard A. Cini, Jr. wrote: > Subject: ZX-81 custom chip - watizit? > I just got a ZX-81 kit (unassembled). I didn't know this before, but the ZX > uses a custom 40-pin IC to perform certain I/O functions. Is this chip truly > "custom" or is it a relabeled Z80 support chip? No, it's a ULA (uncomitted logic array, a sort of early ASIC) made by Ferranti. The ULA replaces several TTL chips that were present in the ZX80. There were two or three revisions of these, and a similar idea was used in the Sinclair Spectrum. The BBC Micro also used Ferranti ULAs, one for the serial controller and one for the video controller. IIRC, the ZX and Spectrum ULAs are still available from CPC in Britain. A ULA consists of lots of simple logic gates laid out in a square array, but the basic design has no final metalisation layer - and hence no interconnections between the gates. A designer using a ULA would translate his circuit diagram into an interconnection diagram for the array, and hand that over to Ferranti, who would then produce the mask for the final stage of the manufacturing process. The end result is a bit like an FPGA, but with simopler building blocks. Apart from that, the relationhip between a ULA and an FPGA is bit like the relationship between a masked ROM and an EPROM. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 12 months

1
0
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Rare Tandy 1400???

by roblwill＠usaor.net

O.K. I've NEVER seen a 1400 with an 8088, though. does anyone have one? -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 ---------- > Part substitutions like this are very common, especially with very similar > parts like the 8088 and V20. Sometimes manufacturers run into problems > getting the chips they need, and often have to take far more drastic > measures, like coming up with kludge boards, piggybacking parts, hacking > up the traces, etc., just because vendor A is saying "12 weeks" and > customer is saying "next week", all for a $4.00 part. > > William Donzelli > william(a)ans.net >

27 years, 12 months

2
1
0 0

Wierd Stuff web site?

by jimw＠agora.rdrop.com

At 05:38 PM 7/30/98 -0500, you wrote: >On Thu, 30 Jul 1998, Richard A. Cini, Jr. wrote: > >> Does Wierd Stuff Warehouse in Sunnyvale have a web site? How about a phone# >> (the one that I have "...has been disconnecte.")? > >Yes, but you have to know how to spell weird :-) > http://www.weirdstuff.com > >Tell 'em one of the local weird collectors sent you. DANG! Wish this had come up about a week ago. I was in California and wanted to see "Weird Stuff", but when all I could track down was the 'disconnected' phone number, I gave up... (no real access to mail/web while I was traveling) DRAT and such... -jim --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw Computer Garage Fax - (503) 646-0174

27 years, 12 months

1
0
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m88k info

by poesie＠geocities.com

I was at a computer junk store the other day and saw a long flat computer case/box; about 3 inches high, about 18 wide and 10 long. It was some sort of unix terminal/system/something, because it still had a label with the network host name etc on it. BUT- it said m88k on it! it might have also said NCR but I'm not sure. what kind of things are used on the 880x0's? I know NetBSD has an m88k port but who or what would have originally run on such things, and how old are they? I have to admit it piqued my curiosity. If possible I'm going back to grab the thing. One last question- how do the 88k's compare to the 68k's or a MIPS chip? I remember some discussion about SGI switching to MIPS instead of using the 88k due to slow development or something to that effect. (whether that's true or not I have no idea, so don't flame me :) -Eric

27 years, 12 months

2
1
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ZX-81 custom chip - watizit?

by rcini＠email.msn.com

I just got a ZX-81 kit (unassembled). I didn't know this before, but the ZX uses a custom 40-pin IC to perform certain I/O functions. Is this chip truly "custom" or is it a relabeled Z80 support chip? Thanks. Rich Cini/WUGNET <nospam_rcini(a)msn.com> - ClubWin/CW6 - MCP Windows 95/Windows Networking - Preserver of "classic" computers <<<< ========== reply separator ========== >>>>>

27 years, 12 months

2
1
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Near disaster and questions on finds

by SUPRDAVE＠aol.com

I agree, this type of shelf he described is great. i worked at a restaurant once that used these shelves and they very adjustable and extremely sturdy. I have seen these racks for sale at housewares stores for somewhat cheaper than if you went to a business/restaurant supply store. In a message dated 98-07-30 21:56:22 EDT, Sam wrote: << Another good rack is the Metro brand. They are a wire mesh shelf with hollow tubing for the supports. The shelves have rings that slip over the tubes, and the height of each shelf is set by a split plastic sheath that clamps around the tubing and wedges into the shelf hole. They are very sturdy and hold an enormous amount of weight. >>

27 years, 12 months

1
0
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Near disaster and questions on finds

by maxeskin＠hotmail.com

Of course, you might as well buy pipe and strong wood from home depot, drill the appropriate holes, and insert bolts in strategic locations. That gorilla rack will probably cost more. > >The best computer shelves I've found were sold in the SF bay area at Orchard >supply hardware. The brand name was "Gorilla Rack". They're heavy, and you >need a hammer to put them together but the shelf supports are about 14 >guage steel angle 2 1/2 inches by an inch quarter inch pressboard on top. >The whole assembly weighs 50 or 60 pounds unloaded, but I've got a pc, >it's monitor, a scanner, a laser printer, a box of cassette tapes, and a tv >on the one I have. It still has room and shows no signs of strain. > >I've seen these at Home Depot under another name. >-- >Jim Strickland >jim(a)calico.litterbox.com >----------------------------------------------------------------------- >Vote Meadocrat! Bill and Opus in 2000 - Who ELSE is there? >----------------------------------------------------------------------- > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 12 months

3
2
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Near disaster and questions on finds

by fmc＠reanimators.org

Tim Shoppa <shoppa(a)alph02.triumf.ca> wrote: > I'm not sure exactly what a "gorilla rack" is, but the industrial > shelf units I buy (about US$70 for 5 24"x48" shelves, 72" high, each > shelf rated for 1500 lbs) would be hard to duplicate for less money. > And nothing beats their ease of assembly. A "Gorilla Rack" is the Harry Homeowner implementation of the same idea. 72" high, three to five 18"x30" shelves I think (numbers from memory). Available at Costco, Home De[s]pot, and Orchard out here in Sillycon Valley, you might substitute Hechingers for the latter, generally priced in the $45-$60 range. Comes in an expensive cardboard box suitable for bringing home in an immaculate SUV. I've used a few of them as well as some larger ones that I've picked up >from a company that excessed its shipping and receiving department and will happily confirm that (a) size matters and (b) bigger is better. So...where are you getting yours from? I think I need a more reliable supply. -Frank McConnell

27 years, 12 months

1
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Near disaster and questions on finds

by allisonp＠world.std.com

Upon closer inspection, it looks like the shelf with (some of) the GRiD' < is about ready to go as well. These are those metal shelves you get at < Target for $8 on sale. < < So, I guess my question is, how to others store their collection? Keep < mind that I'm in San Francisco, and that Earthquakes are an issue. Than Steel racks like the cheap industrial versions. Most of the shelves with aluminum standards are too light weight. I'd suggest the stronger ones or floor standing racks. Allison

27 years, 12 months

4
4
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Near disaster and questions on finds

by sinasohn＠ricochet.net

At 02:23 PM 7/29/98 +0000, you wrote: > In Tim Robbins novel "Even Cowgirls" , the "Chink" quotes the Indians as >saying they knew the white man was crazy but not so completely bonkers >as to live in such a place when they had had demonstrations of the quakes >powers. Well, Quakes can be interesting, but really what they mean is your house/office/whatever is going to be better built than elsewhere, and you grow up with an instinctive eye for not putting breakables in precarious places. Besides, I'd rather live somewhere that had occassional earthquakes rather than a regular tornado, hurricane, or blizzard season... 8^) A lot of people suggested stronger shelves, which would be a good idea except that we're talking 7 sets of shelves (plus a whole lot of computers that I keep promising my girlfriend will get put in there) so $50/set is a lot of dough. Does anyone have any experience with overloading the plastic shelves? We have some running around here, but I don't know how strong they are. As for starting what will end up on the floor on the floor, that would be cool too, but I only have so much floor space (The house across the street just went on the market -- 2700 sq ft, 4 bedrooms, yard: $695K, and no, I don't live in a rich neighborhood.) and everybody pisses and moans as it is about the computers strewn throughout the house already. 8^) A lot of people suggested chicken wire or bungees to hold things on the shelves, which prompted me to think of a low-cost solution my GF's sister-in-law came up with: twine. Lace twine around/through the vertical supports. Surplus phone wire or such would work too, I think. --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

27 years, 12 months

1
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Signup?

by sinasohn＠ricochet.net

At 11:40 PM 7/29/98 -0400, you wrote: >Hate to say this, but your best bet is to find another email provider >than Juno, since many of us have it severely killfilled. I don't, I Not everyone can afford a different provider... >You _are_ signed up for the list -- your message arrived. This does Actually, one need not be signed up to send messages to the list. So he probably isn't, and probably doesn't have web access to be able to find a FAQ. --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

27 years, 12 months

1
0
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Wierd Stuff web site?

by rcini＠email.msn.com

Does Wierd Stuff Warehouse in Sunnyvale have a web site? How about a phone# (the one that I have "...has been disconnecte.")? Rich Cini/WUGNET <nospam_rcini(a)msn.com> - ClubWin/CW6 - MCP Windows 95/Windows Networking - Preserver of "classic" computers <<<< ========== reply separator ========== >>>>>

27 years, 12 months

3
2
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notebook parts sources

by poesie＠geocities.com

PC Service Source, in my reseller experience, seems to always charge high prices & take forever for parts they say are "in stock". not bad for some things, and they will try to get things you can't find anywhere else; but they are rather irritating because several times we were told the parts were in stock and ended up waiting months for them to become available. my two cents. -Eric P.S. - If anyone is interested, I'm willing to provide an edited copy of my windows cardfile of vendors. have about 1000 pages, w/ contacts for alot of diff manufacturers. email privately if interested. :) Wayne Cox wrote: > PC Service Source www.pcservice.com (sorry to mention the "P" word > here) Parts for all kinds of systems, printers, and peripherals. > Including old first-gen laser printers. > > -Wayne Cox

27 years, 12 months

2
1
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Dead keys on C64

by maynard＠jmg.com

Well I landed an amazing C64 software score, with boxed sets of Ultima I, all the Zork series, Neuromancer, an editor assembler package, a koala pad, a bunch of joysticks, and a bunch of other stuff I can't remember. The boxes and manuals are in almost _pristine_ condition! Didn't pay a dime... one of the guys I work with was amazed that I liked this stuff and pulled it out of his basement to give to me for a beer. Well, OK; I paid a beer. ;-) Problem: I just noticed the C64 seems to have these dead keys '5, 7, 9, and 0'. Looks to me like a dead bit on the keyboard controller, but I must confess to ignorance on the internal details of how the C64 accepts key presses. Can anyone give an overview, and would anyone know of a fix? Thanks, --jmg

27 years, 12 months

2
1
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Rare Tandy 1400???

by roblwill＠usaor.net

Hello everyone... I have two Tandy 1400HD laptops. One has an NEC V20 processor in it. The other has an actual Intel 8088 processor. I checked with Tandy's support site, and the 1400 series was shipped from the factory with the V20 chip. The one that I have with an 8088 is also from the factory - it's the original processor. The person who gave it to me was the original owner, and she had never had it serviced. When I took it apart to try to fix the power supply, that's when I noticed that the processor was different. When buying a 1400 new, was it possible to order it with the Intel 8088 chip instead of the NEC V20? Or was some mistake made at the factory (they ran out of V20 chips?) and an Intel chip was put in this one? Does anyone else have a 1400 with an Intel 8088? It this computer possibly worth more than the one with the V20 (I doubt it)? Any information is appreciated. ThAnX, -- -Jason (roblwill(a)usaor.net) ICQ#:1730318

27 years, 12 months

3
2
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Help! Grid 1535 EXP

by rigdonj＠intellistar.net

I tried removing the hard drive and connecting it to a PC in order to reload everything as Doug sugested. The drive is a Conner CP-3044 (2 heads 1047 cylinders, 42 Mb IDE). MS-DOS chokes on anything over 1024 cylinders so I tried to run it on the PC with the cylinders set at 1024 and 1047 but the system said "Drive 0: initialization failure" every time. Does anyone know what drive geometry the Grid uses? I don't *think* the drive is actually bad since I got past this point with the drive installed in the Grid. Will the Grids boot from the external floppy drive? If so, does anyone have one that I can borrow long enough to reload DOS and FastLynx? Joe

27 years, 12 months

3
3
0 0

Near disaster and questions on finds

by allisonp＠world.std.com

< The best computer shelves I've found were sold in the SF bay area at Orc < supply hardware. The brand name was "Gorilla Rack". They're heavy, and < need a hammer to put them together but the shelf supports are about 14 < guage steel angle 2 1/2 inches by an inch quarter inch pressboard on top < The whole assembly weighs 50 or 60 pounds unloaded, but I've got a pc, < it's monitor, a scanner, a laser printer, a box of cassette tapes, and a < on the one I have. It still has room and shows no signs of strain. < < I've seen these at Home Depot under another name. Yes, same here. A simple addition is plywood 1fx2f or 1fx4f (rough size) scred inside the angle steel that form the uprights to form a 3 sided box around the shelf, then one of those cargo nets used for pickup trucks in the front. Properly secured this will hold ANYTHING. RE: earthquake zones. Assuming no fire, racks like that or standard equipment racks can support amazing amounts of weight such that if the "roof" should cave there is support to protect the equipment between and in the racks. Also if racks cannot be tied to the wall, then back to back works or in groups of four with a two back to back and one at each end bolted together as one large unit. The idea is to increase the effective size of the footprint. FYI most equipment racks should have anti tip foot (extensions to the front) to keep their center of gravity from toppling them. Most also have skid feet that were designed to support the rack off the casters, minimally then should be adjusted down so they touch as that will allow sliding but provide better support. Again multiple racks bolted together will provide a very strong unit capable of holding up immense weights. Another disaster trick is if the top of the rack is covered water draining down can't easily get in. Small things can protect the hardware from significant damage. Allison

27 years, 12 months

1
0
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questions about KIM-1, microVAX-1, and Tektronix 4319

by jonathan＠iastate.edu

Hi, I recently acquired a KIM-1 which is mounted inside a wooden case. The board is stamped with a manufacturing date of 3/78 so it was manufactured after Commodore bought MOS technologies. I know that Commodore used metal cases back then. Does anyone know of any third party manufactures that made cases for the KIM-1? This wooden case I have looks too nice to be home made. Second question, I also acquired a microVAX-1. However, the VT240 terminal I attached to it does not appear to be communicating with the VAX. What should the number of data bits, parity, etc. be set to on the VT240? I've tried just about everything I can think of. Could I be using the wrong cable to connect the VAX console port to the terminal? Any help would be appreciated. Third question, I have a Tektronix 4319 workstation with a dead harddrive. Does any one know what maximum size SCSI drive I can connect to it? Any help would be appreciated. Thanks in advance. Jonathan Kavanaugh jonathan(a)iastate.edu

27 years, 12 months

1
0
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Teasers

by mbg＠world.std.com

>My first PDP11 came as just the bare CPU + RK11-C controller. No drives >or I/O cards. I spent a lot of money (relatively) on my first RX02, RK05 >and some cards. 1 month later, people were giving me the things ! Gee, my first -11 was an 11/10 bought (refurbished from Digital) back in 1979 or so... it was the CPU box only. No interfaces save for the console terminal (at 20ma). I didn't even have an H960 to put it in. I had to buy that from Digital salvage later on... I finally found some RX02s and a controller, TU60 deccassette and controller and I was off... I ran RT-11 and the virtual terminal software (which later became VTCOM) and worked from home over an AJ 300 baud modem... Later on I got a DF02 and was able to do 600baud, and a DF03 and 1200baud... Oh yeah, I took a loan (home improvement :-) to get the -11... 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 | +--------------------------------+-------------------------------------+

27 years, 12 months

2
1
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EPROMs

by yakowenk＠cs.unc.edu

I've got a big handful of 27128's here that I don't need. If you have anything smaller than a 2764 (ie: anything from a 1708 up to a 2732), and would like to trade one-for-one, give me a holler. Cheers, Bill.

27 years, 12 months

1
0
0 0

The Moog

by sinasohn＠ricochet.net

At 09:09 PM 7/28/98 -0700, you wrote: >How do you plan to digitize the recordings in the first place? I'd like >to do that too, but soundcards are pretty lousy recording devices. I figure >it's a fundamental problem to have audio equipment sitting on a computer >bus. I'd really like to see an affordable external D/A/D box. The Atari Falcon (while not quite 10 years, I think) had a built-in Motorola DSP (56661?) in it for digitial recording. Dunno your definition of "affordable," but they can be had for around $600. Just add a big SCSI hd... One thing, though, the DSP in the Falcon records at (iirc) 48mumblemumble instead of the 44(?)mumblemumble used for CD's. (I forget what it's measured in but the Falcon is off a little, so you have to do some finagling to get it onto the CD or whatever. A little research in the Atari newsgroups should take care of it.) --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

27 years, 12 months

2
1
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Rescue list

by yakowenk＠cs.unc.edu

I've finished mangling e-mail addresses on the rescue squad volunteer list. If you find any mistakes, or dislike what the random number generator did to you, let me know about it. (Those requests should probably go just to me, and not to the whole list.) Later, Bill.

28 years

1
0
0 0

ps/2 m50z setup

by allisonp＠world.std.com

< Peter Wendt in Germany has a Microchannel Enthusiasts Page at < http://members.aol.com/mcapage0/mcaindex.htm and has a program for free < known as QBMCA that will look at the adapter cards and show the ID and n that was a big help. Thanks everyone that get me to the point were I can start testing the scanner... Allison

28 years

1
0
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Near disaster and questions on finds

by mbg＠world.std.com

Most of my collection is on the floor, or on tables. Since you live in SF, land of earthquakes, I will recommend something I learned from years of boating... "If something can possibly end up on the floor.. ... start it there..." 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 | +--------------------------------+-------------------------------------+

28 years

1
0
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a whatsits: Grid 1535 EXP

by higginbo＠netpath.net

If they are matchboxed sized, they might be from a GRiDPad... At 01:04 AM 7/30/98 -0500, you wrote: >> I didn't notice a ring. They were cigarette size boxs and marked "Grid >> 120" and had a connector at one end. > >Those sound like the removable hard drives from my GRiD 1810, one of the >made-in-Japan plastic GRiDs.

28 years

2
2
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HP 9000/345

by sinasohn＠ricochet.net

Okay, so I picked up an HP 9000/345 (and a /310) and an HP-IB HD unit with 3 5.25" FH hard drives in it. And I've got an HP-IB cable. So, what else do I need to get a unix-ish box up and running? Note, the HD was not purchased from the same place as the 9000, so the chances of it having a valid OS on it are slim. I did come across the HP9000 FAQ, but it doesn't really address my situation. As I understand it, I can run either HP-UX or NetBSD, of which the latter is the more affordable option? So, any tips on what to do next (aside from hooking them together and turning them on to check for smoke leaks) would be greatly appreciated. --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

28 years

3
2
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mac os stuff WAS: Re: Zenith Data Systems laptop

by maxeskin＠hotmail.com

But microsoft would have to change the license for that. Apple never sold System 7.0 and below as a commercial product, so they didn't really 'handle' it. Of course, you could always get Linux, X11, wine, and DOSemu to take care of your problem (albeit in 10 times the disk space :) > >I love how Apple handled that. I just wish you could do the same on >Microsoft's site. Windows 3.0 and below, DOS 5.0 and below would do the trick! > >At 12:15 PM 7/29/98 -0700, you wrote: >>At 02:34 PM 7/28/98 -0600, you wrote: >>>MacOS 7.0, and I THINK owning a mac gives you a license to an operating >>system >>>- although I'd have to check. >> >>MacOS through 7.0 is freely available from apple, and can be copied >>legally. 7.1 and above are still commercial products (not available for >>free or legally copiable.) >> >> >>--------------------------------------------------------------------- O- >> >>Uncle Roger "There is pleasure pure in being mad >>roger(a)sinasohn.com that none but madmen know." >>Roger Louis Sinasohn & Associates >>San Francisco, California http://www.sinasohn.com/ >> > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years

1
0
0 0

Attention Collectors . . .

by maxeskin＠hotmail.com

What is a multispeed anyway? Is it a turbo XT? How much does it weigh? > >If anyone really wants one of these I can pick two up (unknown condition) >at a local thrift store for $4.98 each and ship it at your cost. > >Sam Alternate e-mail: dastar(a)siconic.com >------------------------------------------------------------------------------- >Ever onward. > > September 26 & 27...Vintage Computer Festival 2 > See http://www.siconic.com/vcf for details! > [Last web page update: 07/26/98] > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years

1
0
0 0

Mac SE SuperDrive password

by PB14＠leicester.ac.uk

On 30 Jul 98 at 10:43, Russ Blakeman wrote: > A buddy of mine just got a Mac SE Superdrive computer that he says has > a hardware pasword. Any ideas on how to disable it - jumpers, key > combos, pull the battery, software, what? The password on an SE can only be implemented at software level on the boot volume (internal hard disk), so you can forget about batteries and jumpers. Guess 1: the password is implemented using a fairly insecure shareware tool. Try holding down the Shift key on boot up. If the Mac is running System 7 or greater this (usually) prevents extensions from loading. You can then try to identify the extension (INIT in older Mac speak) that is locking down the computer. Note: there are one or two utilities that can disable Shift-booting in System 7. Try booting from System 6 or 7 Disk Tools (downloadable from ftp.info.apple.com) which both work fine on an SE. You will need a Mac to generate the boot disk. Try booting from this disk and try looking for a suspicious extension or INIT in the System Folder. If necessary, move all of the extensions (or INITs) out of the system folder altogether (eg folder at root area of hard disk); the Mac SE will still boot without them. Guess 2: If you've moved all of the extensions and you're still getting a password dialog box, it may well be a more sophisticated security tool (eg FileGuard, Empower). Boot from your Disk Tools disk yet again and run "Apple HD SC Setup". With any luck, you should see the name of the hard disk and it will be identified (most likely) as SCSI Device 0. Press on the "Update" button to replace the SCSI driver on the hard disk (surprisingly this will defeat some of the older security tools). Don't be surprised if a dialog box pops up asking for a password. Even then you're not necessarily 100% stuck. If the security software has encrypted the hard drive, the only solutions are to enter the correct password or to format the hard drive. The security software will even try to prevent you from formatting the hard drive but there are ways around this. If the security software has not encrypted the drive, you can boot >from a floppy and supress scanning of the SCSI bus on startup by holding down Command-Option-Shift-Backspace. You can then use a disk editor such as Norton to hack away at the boot blocks to remove the offending software. The hard disk will no longer boot but you can access the contents; running the "Update" function on "Apple HD SC Setup" will repair the disk sufficiently so that you can reinstall the System software. Phil ************************************************************** Phil Beesley -- Computer Officer -- Distributed Systems Suppport University of Leicester Tel (0)116 252-2231 E-Mail pb14(a)le.ac.uk

28 years

2
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