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Digital Equipment Corporation PDP-8by billdeg Total messages in this thread: 2 Updated: [ PDP-8 Testing ] 08/16/2023  Drew helping wheel our new DEC PDP-8 computer, donated to Kennett Classic museum in late October 2022. I drove the computer from Chicago a few weeks after VCF MW.
 Front panel view, DEC PDP-8 computer
This is the rack model acquired in late fall 2022. The system can run the "chase the lights" program indicating a minimum CPU function. Powering off and then on again, the system retains the values of the chase the lights program and will re-run again.
NEXT: Document cards installed, detailed pictures and testing with a Teletype ASR 33.
Just so you know, I have powered up this system 25 times and worked with the front panel, but I wanted to clear a good block of">... [ read more ]
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1985 Zenith ZFA-138 Portableby billdeg Total messages in this thread: 1  1985 Zenith ZFA-138 Portable. Click image to see larger view.
Donation to Kennett Classic, outer case cleaned, machine in operational condition.
More Pics">... [ read more ]
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XYBASIC on the IMSAI 8080by billdeg Total messages in this thread: 1  XYBASIC initialization screen. 44K available, better than an IBM PC.
You can load and run XYBASIC for the IMSAI 8080 with SIO set for 9600b, assuming you have a ROM monitor can can accept binary HEX files or you have toggled in the bootstrap loader into RAM first. Also assuming you have a PC running a terminal program such as TeraTerm on the other end:
1. Prepare your PC terminal to transmit with a 10ms delay, 8N1.
2. Prepare the IMSAI to receive a HEX file. For most ROM monitor programs, the command L (load tape) should work.
3. From your PC terminal program send xybasic.hex as a binary file.
4. You should see the binary file contents stream line by line as the file downloads into your IMSAI from the PC. The 10ms delay is necessary">... [ read more ]
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IMSAI 8080 Chase the Lights Variationsby billdeg Total messages in this thread: 1 Variations of the chase the lights toggle-in programs 1. 0000: F8 F1 E3 C7 8F 1F 3F 3F 1F 8F C7 E3 F1 F8 FC FC 0100: 80 40 20 10 08 04 02 01 00 01 02 04 08 10 20 40 ... run from 0000 Generates an inverse pattern effect, the non-shining light travels back and forth 2. Same as before except 0100 is: FE FD FB F7 EF DF BF 7F BF DF EF F7 FB FD FE FF Generates the traditional single light traveling back and forth">... [ read more ] |
1985 PCs Limited Turbo PCby billdeg Total messages in this thread: 1  The 1985 PC’S LIMITED Turbo PC. Click image for larger view.
 ARC produced the first Turbo PC motherboard. Click image for larger view.
 Newest chip dates are 25th week of 1985, making this an early model. Click image for larger view.
This machine was donated to Kennett Classic as unoperational. I replaced the power supply with an original IBM XT supply and replaced the hard drive controller card with a simil">... [ read more ]
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Computer Music Using the IBM 7094by billdeg Total messages in this thread: 1  Click image for PDF version
Recently read ... Computers Admiration and Fear- "...the IBM 7094 digital computer as a translator of music..." used to generate music for a recital at the Riverside Museum in Princeton, NJ USA. Anyone have a recording? "On the other hand....The Anthroposophical Society whose members believe in the omnipotent computer in the sky.."...satellite anyone? Source: The Realist no. 75, June 1967
Supposedly you can hear this on Charles Dodge's "Computer Music" album from 1970.">... [ read more ]
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1975 IMSAI 8080 with 1981 Morrow 64K RAMby billdeg Total messages in this thread: 2 Updated: [ Loading Imsai BASIC ] 07/04/2023  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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