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Summary of CBM PET 2001 Systems on hand

by billdeg - 03/18/2007
Total messages in this thread: 2
Last Post: [ Update ] 07/15/2008
PET 2001-8 works. tape desk works but could use maint. keybd keys work. PET 2001-16N works. new keybd. PET 2001 32B bad 4279 chip, monitor picture shrinks after 10 minutes use - when I received system the suction cup had become dislodged from picture tube. Replaced power supply. 1 and Z key does not work.... [ read more ]

PDP 11/40 Program on YouTube

by billdeg - 07/10/2008
Total messages in this thread: 2
Last Post: [ PDP11/40 test code ] 07/13/2008
Today when I got home from work I sat down at the PDP 11/40 (in the guest room). Here is what I came up with: http://www.yout...och69Nm2F0 Basically I loaded two programs into memory using the toggle switches. I pre-loaded the following programs into memory, the video shows me running them. One is a counter from address 001000 data 005000 005200 000005 000775 by adding a command it becomes chase the lights from address 002000 data 005000 005200 006100 * 000005 000775 * = added this command The rest of the data in this section of memory is 777777 and 000000... [ read more ]

Sage II 68000 Computer

by billdeg - 07/10/2008
Total messages in this thread: 2
Last Post: [ Sage II 68000 Computer ] 07/10/2008
Pictures of Sage II. Serial number is 68615... [ read more ]

Altair 8800bt notes

by billdeg - 01/01/2005
Total messages in this thread: 8
Last Post: [ MITS 88-TPM Users Guide ] 06/28/2008
Original date: 1-1-05 Pictures: http:...S/8800b-t/ Purchased from a seller in Florida Altair 8800b turnkey notes. 1-1-2005 Overall condition - excellent, no dust or crud internally. - cards and cables appear in excellent shape. - did not attempt to remove cards ... [ read more ]

NEC PC-6001A

by billdeg - 06/05/2008
Total messages in this thread: 1
On the eve of the launch of the IBM Personal Computer in 1981, NEC also began selling computers in the USA market. The PC-6001A is the first of the NEC computer models. As part of my research into Japanese computer companies of the early 80's, the NEC PC-6001A is of special interest to me. This system was a Z80 color computer, similar to the Tandy CoCo. Pictures
Orange Keys!... [ read more ]

Another IBM 5150 rev "A"

by billdeg - 06/05/2008
Total messages in this thread: 1
I received another IBM Personal Computer model 5150 16K/64K motherboard with the black power supply. The system came with a Plus Hardcard 20, an extra 64K card (combined with the motherboard RAM = 128K system), dual IBM 36 drives with stock controller, and the IBM monochrome monitor card. Initial boot: 9010 201 + (...I then pressed F2 to clear the error, followed by...) PARITY CHECK 2 error I removed the Plus Hardcard 20 and rebooted. This time I only got the PARITY CHECK 2 error message. I checked the jumper settings and re-seated the RAM. System booted perfectly, both drives work. The serial number is 0239462 and the ROM is dated 10/27/82, one year newer than the MARCH IBM PC 5150 previously restored and discussed in this blog. I then tried the PLus Hardcard 20 again. I am not sure if I need the driver or special boot disk, but I get a 1701 error... [ read more ]

need system disk for Sony wp OA-S3300

by Leslie Aguillard - 05/27/2008
Total messages in this thread: 1
I have a vintage Sony wp and lost the system disk for drive 1. Without it, the wp won't work. Surely, someone has a back up for this wonderful system. contact lesliereiki@msn.com... [ read more ]

updated my Computer Parts list

by ragooman - 05/25/2008
Total messages in this thread: 1
I updated my parts list online. Slowly but surely, I'll have what's in the parts bins from my workbench online. http://www2.app...uter_parts.html =Dan... [ read more ]

IBM 5150 Restoration Project

by billdeg - 05/23/2008
Total messages in this thread: 3
Last Post: [ Install monocrhome cd and 64K card ] 06/02/2008
This thread pertains to the restoration of IBM PC 5150 sn 0192592. This is a model "A" and an early one at that. Note the pictures of the serial number sticker compared with "newer" model A's. Note to self for parity messages / switch settings info: http://www.vint...hread.php?p=62972 href="ibm/5150/5150_A/">Pictures of IBM PC Model 5150 "A" 16-64K Motherboard Quick summary - I was able to get the system to boot with 32K RAM. I have identified that bank 3 (and/or 4) has a bad chip in it, need to replace. More details to follow...... [ read more ]

updated Electronics Parts Supplier List

by ragooman - 05/21/2008
Total messages in this thread: 1
I updated my Electronics Parts Supplier List on my website If anyone is looking where to find parts, you can take a look here too http://www2.applega...-electronics-parts.html... [ read more ]

Smith Hall Display on the Apple Computer

by billdeg - 05/07/2008
Total messages in this thread: 1
".. On behalf of my Computing Museum Curator colleagues (Lori Pollock, Chandra Reedy), I invite you all to peruse the latest Smith Hall lobby display dedicated to the Apple Computer. The display was sponsored by an Arts & Sciences College Transformation Grant, and is the result of independent study efforts by two undergraduates: Zelphi (Sola) Johnson, a CIS senior who will be joining our dept in the fall as a PhD student, and Katherine Chiumento, a senior Art Conservation major. Bill Degnan, who teaches CISC367: History and Preservation of Microcomputing for the Department, helped acquire most of the components in the display as well as provide invaluable technical expertise on their history. Enjoy! Paul .."... [ read more ]

Tarbell Controller 8080 System CP/M 2.2

by billdeg - 04/24/2008
Total messages in this thread: 3
Last Post: [ Another 1101D to compare with... ] 04/27/2008
I found in my stuff a Tarbell disk controller and docs that refers to CP/M 1.4, with directions for installation and testing on an Altair or IMSAI with 8080. Interestingly I also found a few CP/M 2.2 disks labeled "Tarbell". Hmm.. Then I found this http://www.youtube...v=3DRj_bDPuLg Before this video I did not know that there was a 2.2 version of CP/M for the 8080 computer. For some reason I thought few people if any used anything other than a z-80 processor system to run CP/M 2.x - I thought that CP/M 2.2 would only work on the z-80. I guess I was wrong! I have either of these two versions of CP/M 2.2 on disk, not sure which yet: 14 16 00 00 06 97 9603CPM.COM Tarbell CP/M 2.2 14 16 00 00 06 98 9605CPM.COM Tarbell CP/M 2.2 (from ..http://www.retrotechno...dri/cpm_serial.html) I wonder if these are simply the 8080 and Z80 versions? At some... [ read more ]

Trenton Computer Festival 2008

by billdeg - 04/27/2008
Total messages in this thread: 1
Here are some pictures from Saturday at the Trenton Computer Festival, 2008. The featured display of the Mid Atlantic Retro Computing Hobbyists' (MARCH) exhibit was it's Digital (DEC) PDP/8 - an original "straight 8" serial number 1158. The machine, according to David Gesswein, is restorable. Donated by Claude Kagan Also part of the PDP 8 system is a plotter (name?) and an ASR 33 teletype. Also displayed was an IMSAI 8080, Atari 800xl, Atari 2600, Apple //e, Commodore PET 2001-8, Intel MCBS-10 control module, Amiga 500, and Amiga 3000. Pictures from TCF 2008... [ read more ]

BBC Master 128 wanted

by locki_star - 04/25/2008
Total messages in this thread: 1
Hi all, Anyone got a working BBC Master 128 they dont need anymore? Let me know... willing to pay for shipping to UK, and maybe a little extra for effort :) locki_star@hotmail.com... [ read more ]

Processor Technologies VDM-1

by billdeg - 04/22/2008
Total messages in this thread: 1
I have been accumulating these display cards because I have found them easy to use with CUTER for testing memory, etc. Testing Results: 3 working 1 sends "crazy" display of characters to screen 1 burned out IC c8.... [ read more ]
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