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1975 IMSAI 8080 with 1981 Morrow 64K RAMby billdeg Total messages in this thread: 1  IMSAI 8080 running Jon Chapman's Glitchwrks GWROM-80 Intel 8080 ROM monitor program customized for the IMSAI 8080 and IMSAI SIO serial card. Click image for larger view.
The objective of this project is to build up an IMSAI with a usable ROM monitor program that can be used to load programs and manage RAM. The system should also provide access to most of the 64K address space, all while retaining the use of both the IMSAI front panel and/or a 9600b serial terminal. The use of a front panel is hightly valued for diagnostics, programming, and S-100 board hardware testing. Basically this will be my bench S-100 system.
The challenge is to try to do all of this with a newer IEEE 696 RAM board.... [ read more ]
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Vintage Computer Festival East 2023by billdeg Total messages in this thread: 1  Kennett Classic exhibit table. Click image for larger view.
 Datec 1000. Click image for larger view.
 Triadex MUSE and books relating to computer intelligence. Click image for larger view.
Many more photos">... [ read more ]
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1997 IBM AS/400e 9404-620 Serverby billdeg Total messages in this thread: 1  Pictured is an 1997 IBM AS400e model 9404-620, donated by GG Bearings along with related hardware and software. The hardware had been updated over the lifetime of the system, which was finally retired in 2018! Click image for larger view.
Additional hardware donated was a Magstar MP 3570 tape storage unit, and a 06G6331 terminal. It's currently sitting in the entrance of the library under the stairs alcove.
This should be a fun project. I am hoping I can start by scaling back the system in order to limit the power usage. Otherwise I may have to get three-phase power. Fortunately we have the AS/400 OS install CDs and a few hard drives that are compatible with which to install the OS.
 ... [ read more ]
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1979 Intertec Superbrain Computerby billdeg Total messages in this thread: 1  In 1979 Intertec Data Systems Corp made an all-in-one Z80 computer with twin internal 5 1/4" disk drives. Note that the display adhesive has started to separate from the CRT and needs to be restored by removing the old adhesive.. Click image for larger view.
The machine itself does not boot yet. The display can be fixed in a manner similar to that when one repairs the ADM-3a terminal (hopefully). Stay tuned.">... [ read more ]
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1983 TI Portable Professional Computerby billdeg Total messages in this thread: 1  This Texas Instruments Portable Professional Computer was donated by Robert Martin. Click image for larger view.
This computer booted up just fine, but I had no boot disks. The Portable Professional uses a disk format that's incompatible with any other MS DOS computer that I know of. It's not possible to simply copy the disks from another DOS machine. I found a disk image repository that had a copy of the TI boot disk:
Microsoft DOS images
https://winworld...om/product/ms-dos/
I created a physical disk using the archive PC at Kennett Classic, using Dunfield's image disk utility with a 1:2 interleave.">... [ read more ]
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Windows 1.01 Running on an XT Cloneby billdeg Total messages in this thread: 1  Harry Zwick donated this IBM XT clone. It has an Intel 386 processor card installed. As you can see, it's running Windows 1.01. Click image for larger view.
I thought maybe it might be fun to put Windows 1.0 on an XT clone, to take advantage of the 386 add-on controller. I probably could get Windows 3.0 running but for another time. To install WIndow 1.01 on this computer first I needed to update the install disks. I replaced the mouse.drv with a newer version (from the Win 2 install disks) so that my P/S mouse would be recognized. I did this, rather than use an original MS Mouse because the system already had DOS drivers installed for the DOS 3.3 environment previsiouly installed before I added Windows. Sometimes">... [ read more ]
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1988 Apple IIc Plus FugiNet Testingby billdeg Total messages in this thread: 1  Apple IIc Plus. Click image for larger view.
The internal 3.5 drive controller was toast, so I had to replace it to get the drive to work correctly. This is a wonderful machine, very fast and has an smart drive that allows it to interface easily with the FujiNet networking device being developed today. The only issue I have with the IIc Plus is that most Apple II software is written for 5 1/4" drives. The system is thus most useful with an external 5 1/4" drive attached. It's not possible to use the FUJINET with an external drive attached.
 FUJINET for Apple II works best on the II">... [ read more ]
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VDM-2021 (a VDM-1 reproduction)by billdeg Total messages in this thread: 1  Sitting on a riser card, the VDM-2021 is a reproduction of the original 1076 Processor Technologies VDM-1 video / display S-100 controller.
I traded a non-working original VDM-1 for the replica VDM-2021. It worked great. The only issue is that as received the connector coming off of the card is in a bad spot and needs to be moved. For testing I simply put the card on a riser.
As ALWAYS with this IMSAI 8080, one of the first I owned, it's always in need of some repairs. A few keyboard wires are in need of suring up. I can't do much until the connector wires are cleaned up. I am temporarily using an aligator clip, etc.">... [ read more ]
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1991 Apple Macintosh Powerbook 170by billdeg Total messages in this thread: 1  1991 Apple Macintosh Powerbook 170 had a Motorola 68030 microprocessor and cost $9100 in 2023 dollars!
This computer works, no restoration needed at this time.">... [ read more ]
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1995 Apple Macintosh Performa 6300CDby billdeg Total messages in this thread: 1  Apple Macintosh 6300CD computer, upgraded to a 6360CD by Joe Tooman.
READ MORE:
https://www.kenne...h-performa-restoration/">... [ read more ]
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Scientific Data Systems 420by billdeg Total messages in this thread: 2 Updated: [ Not Good ] 04/19/2023  The SDS 420 computer is a 6502 CPU computer with Persci model 277 dual 8" disk drives and proprietary operating system. Click image for larger view.
More pictures
I received the computer in pieces. The CPU board and RAM expansion board have a 1977 date on them but the actual machine was produced or last upgraded in 1979 (?). I worked with one of the engineers who built the computer, Bill Scheding, to re-assemble it. The Persci drives require repairs but overall everything looks good and should be fully restorable. I have a lot of notes and will post asap.
Next - Rehab the drives and boot up the system. Document the memory map and archive the software.">... [ read more ]
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Computer History and Restoration Linksby billdeg Total messages in this thread: 1 The thread date indicated last update. Suggest a site here. Bitsavers Software and Document Archive http://bitsaver...dge.com Retroarchive Multi-Platform http://w...ve.org TextFiles.com rTTY Art Repository http://artsc...LLECTION/ Mazjel.com Datastore: Manuals and system docs galore. http://maben.ho...S100/index.html Dave Dunfield's Site - vintage computer newbies should start here, disk archiving info here http://www.classic...dunfield Glitchworks FDC Results Registry - Drive controllers for imaging disks https://services....tfdc_results Bryan's Old Computers Document Archive http://bytecoll....com/m8_docs.htm The Homebrew Computer Club Newsletters https://ark...-computer-club Every Computer That Ever Was (list) http:">... [ read more ] |
Digital TU56 for PDP-9?by billdeg Total messages in this thread: 2 Updated: [ Negibus or Posibus? ] 01/17/2023  View of a recently donated TU 56 dual tape drive, prior to any restoration efforts. Click image for larger view.
 W850 C bus connecting cable. This end goes to the PDP-9 (!). Click image for larger view.
More photos">... [ read more ]
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DEC PDP 8/e MM8Ej RAM (8K) Repairsby billdeg Total messages in this thread: 2 Updated: [ Getting 32K Again ] 12/09/2022  PDP 8e with H-19 terminal on the ground, displaying a directory from RK05 diskpack. Click image for larger view.
This thread will document the current progress with the PDP 8/e located at Kennett Classic. It's the same system written about earlier here.
The current issue is that the system boots from RK05 diskpack 0, but the MEMORY command says only 8K RAM is available, even when more RAM is installed. 8K is not enough for any useful operations on this system.
The proper next step is to run the MAINDEC DEC8X diagnostics, which naturally bombs without more RAM in the system. Love the classic chicken and egg DEC troubleshooting problems. There does not seem to be any manual online for this specific board">... [ read more ]
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