test-drb February 1999

test-drb@ccmp.vtda.org

178 participants
709 discussions

ALTAIR stuff (was Re: E-Over Pay strikes again! original Altair disk sells for... )

by allisonp＠world.std.com

<What I find odd about the MITS FDD is that they used a 37-pin "D" connecto <and cable as opposed to the 50-pin more commonly seen on the 8" types. I <found one among a set of enclosures I bought about 20 years ago. While Standards and common connectors. My Vt180 (uses minifloppies) also uses D37 on the cpu end rather than 34 or 50 pin. Reason, higher reliability connector (more costly too). Lots of system used that as the connector instead of the now common IDCs. FYI even for 8" disks of the 50, 25 lines are ground there are a few unused and others that were not often used so 37 pins are plenty. Allison

25 years, 5 months

front panels (again)

by allisonp＠world.std.com

<> Here's the list I've got so far: <> <> Intel Intellec-4 <> Intel Intellec-8 <> Scelbi 8H <> Mark-8 <> Datanumerics DL8A <> Altair 8800 <> BYTE, Inc. BYT-8 (and Olson 8080) <> IMSAI 8080 (and OEM versions) <> Altair 680 <> Ithaca Intersystems DPS-1 NEC PDA-80, an 8080 development system(8080 powered). <> mini's, and I'd especially like to know which computer first used this <> human interface. All of the first machines. As to being an interface it was more of a necessity as most did not have the ROM/PROM needed to boot without manual intervention or as a diagnostic tool. Allison

25 years, 5 months

Attn PC-jr Fiends!

by jeff.kaneko＠juno.com

Guys: I have a NOS PC-jr joystick. The box is kinda messed up, but otherwise, the stick is brand new. Anybody want it? Make me an offer, private e-mail. Thanks. Jeff Jeff.kaneko(a)juno.com ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]

25 years, 5 months

E-Over Pay strikes again! original Altair disk sells for

by dougdu＠MICROSOFT.com

I'm sorry! After reading my own email it appears a little gruff. I certainly didn't mean to offend you. All I'm trying to say is that MITS did have a 5-1/4" hard sector system available. - Doug > -----Original Message----- > From: allisonp(a)world.std.com [mailto:allisonp@world.std.com] > Sent: Friday, February 12, 1999 5:34 PM > To: Discussion re-collecting of classic computers > Subject: RE: E-Over Pay strikes again! original Altair disk sells for > > > > <True enough I'm sure. MITS also produced a "mini"-floppy > controller that > <was also a two board TTL set. The first board (computer > interface) was th > <same board as in the 8" set (except for different RC > values), the second > > Well heres where I stand on it. Never seen one, I was there, > and never > seen an advert for one, I have back issues. Was it possible, > sure. The 8" > design with some tweeks would certainly do minifloppy. > > Allison >

25 years, 5 months

E-Over Pay strikes again! original Altair disk sells for

by dougdu＠MICROSOFT.com

The docs I have are titled "Altair 88-MDS Minidisk Documentation" they are copyright MITS, Inc. 1977 and listed as First Printing, July, 1977. The documentation describes both the controller card set and disk drive unit.

25 years, 5 months

PCJr Color Diplay for adoption

by rhblake＠bigfoot.com

I have a PCJr Color Display monitor, complete with the authentic block type connector that APPEARS to be in working condition that I really need to find a good home for. Not free, but cheap enough - $10 plus the applicable USPS shipping (insurance at your request) My guess is the weight is around 26 lbs. The monitor is in great phyical shape but has NOT been tested on a Jr for picture. It does power and does give raster on the screen so I can say that it is apparently in working condition. The $10 I want for it basically covers what I have in it besides the time in locating a shipping carton and hauling it to the post office, along with the minor differences (if any) in calculated postage. This is for USA addresses only. I know people ship things outside the US all the time, but I don't have the time or the patience for the added paperwork and other thing involved in out of US shipments. Contact me by direct message please, not by replying to the list. The monitor would come from zip 40144 in cae anyone needs to sneak a look at approximate postage themselves. I hate to see a possible addtion to a Jr collection go to the dumpster because someone was too cheap to spend a few bucks on it.

25 years, 5 months

Blinkenlights

by Jgzabol＠aol.com

Doug wrote: << It is possible that Berkeley got the idea from working on the Univac (in the late 40's, when it was being designed by EMCC). I suspect that the earlier relay machines also used lights to help debug faulty relays, but I'm really looking for when lights were first used for output and switches used for input, similar to the way a bunch of the mini front panels worked. (It may be that Simon was the first -- I dunno.) >> Just a few weeks ago I looked at the Harvard Mark I, and I know very well the Zuse machines. No lights! John

25 years, 5 months

Zeos Laptop

by Mzthompson＠aol.com

Someone gave me a ZEOS 386 laptop, Model S99102-000, circa 1990. It was in need of some minor repairs which were no problem. There is a small empty compartment of the left side, measuring 1/2" by 1 1/2" and about 4" deep and with a 20 pin edge connector at the back. Zeos support tells me that the only option for that was a 2400 baud modem and it is no longer available, which I sort of figured. I got to thinking that if that card connector were a serial port, it would not take much to fabricate a board to bring the right signals lines out to a 9 pin D connector to add a second serial port. My question is whether the 20 pin connector is a subset of the I/O bus or is it a serial port? If it is a serial port, then what is the pinout on the 20 pin connector, which signals are which pins? Any help you can provide would be greatly appreciated. Thanks, Mike Thompson

25 years, 5 months

Tek 4051 and 4907

by Innfogra＠aol.com

I've been looking in my old Tek catalogues and the disk drives for the 4050 series are model number 4907, not 4097. This is from my 84 catalogue. Option 31 is three disk drives, option 30 is two disk drives and option 40 is 4052 and 4054 compatibility. Paxton

25 years, 5 months

Intel 4004

by davidfreibrun＠home.com

You have an Intel 4004? Where did you obtain this? -----Original Message----- From: Ethan Dicks <erd(a)infinet.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, February 09, 1999 11:42 PM Subject: Re: Intel 4004 >> >> > From: Dwight Elvey <elvey(a)hal.com> >> > To: Discussion re-collecting of classic computers >> <classiccmp(a)u.washington.edu> >> > Subject: Intel 4004 >> > Date: Tuesday, February 09, 1999 11:43 AM >> > >> > Hi All >> > I have gotten my 4004 development unit up and running. >> > In doing so, I made some tools. I have a simple >> > assembler, disassembler and a simulator. If anyone >> > would like copies of these tools, let me know. >> > Dwight > >I would *love* some 4004 tools. I have a 4004 that I plan to build >into a project someday. It came out of a non-UPC grocery store barcode >scanner I bought at the Dayton Hamfest in 1983. > >Thanks, > >-ethan

25 years, 5 months

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test-drb February 1999