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CBM Expansion Memory Board 64K |
MICROWORLD / 1980 Videoby billdeg Total messages in this thread: 1 William Shatner short documentary about the history of transistors, microelectronics, etc. http://www.youtube.com/watch?v=q2kd1B0Ybto">... [ read more ] |
Lambda Physik TRS 80by billdeg Total messages in this thread: 2 Updated: [ Lambda Physik FL 580 ] 03/30/2011  The Lambda Physik FL 580 Scan Control device used a TRS 80 Model 1 as it's computer. And it's orange.
The Lambda Physik unit powers up and responds to front panel toggle switches. The scan control unit was attached to the TRS 80 Model 1 via the expansion port. The card cage system would likely have been accessed by running a SYSTEM command from the TRS 80 and then at the asterisk prompt a command like /nnnnn where nnnnn = the memory location (?) of the scan control unit. I tried /12345 but it did not activate the unit. This is the memory location of the stringy floppy.
Preliminary testing reveals a bad TRS 80 power supply, but when a working supply was used the computer was able to boot up. The computer has 16K. model 26-1006. Also attached to the TRS 80 is a set of">... [ read more ]
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Bring up CPM3 for the first timeby monahan_z Total messages in this thread: 4 Updated: [ Bringing up CPM3 on a Hard Disk System ] 03/16/2011 Just FYI, I have written up a step by step set of instructions for installing CPM3 on a floppy disk system. The current writeup is for a very simple "Non-Banked" system. I will later enlarge upon this for a "Banked" system and for a more extensive IDE drive hard disk system. See:- http://s100comp...3%20BIOS%20Software.htm">... [ read more ] |
The Gavalin SC Laptopby billdeg Total messages in this thread: 2 Updated: [ Hi, I have a question about the Gavalin. ] 02/28/2011 I recently picked up the 2nd Gavilan laptop, the SC model.  The 1984 DOS-based Gavilan SC laptop computer.
There was so much battery acid leakage I was amazed I could even power up the system at all (after cleaning with a baking soda solution). When powered up, the system counts from 1 to 5 and then shows a code "010". Not much else. Does not attempt to boot the diskette that came with it. At least the LCD seems to be OK.
pictures">... [ read more ]
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Vintage Computer Festival East 7.0by billdeg Total messages in this thread: 1 Official Web Site: http://www.vintage.org/2011/east/ Pics of exhibits from past events: http://vintagec...cfeast7 Mid-Atlantic Retro Computing Hobbyists http://www.midatlanticretro.org">... [ read more ] |
LNW80 Computerby billdeg Total messages in this thread: 3 Updated: [ Using a VRData Hard Disk III with LNW? ] 02/09/2011  The LNW80 Computer by LNW Research Corporation was a TRS 80 Model 1 clone computer that ran at 4 Mhz.
 LNW80 docs
More Pictures
I have not been able to boot any OS disks yet, but I have been able to get to the BASIC prompt and run some simple programs.
">... [ read more ]
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A New FDC Board for S-100 Systemsby monahan_z Total messages in this thread: 1 For people that may be interested in building a new S-100 Floppy disk controller (FDC) board that can be configured to work with most 8 and 5 (soft sectored) disks I have designed and built a new Z80 based Western Digital 2793 FDC board. With Andrew's help (3 prototype boards later!) we now have a board that we are very happy with. With its own independent Z80 on board, it is completely command driven via 2 parallel ports (with strobe bits) to/from the S-100 bus. This makes writing BIOS'es for any operating system very simple and easy. For anybody that's interested in obtaining a bare board we will be ordering a batch real soon. Please see here for a more complete description. http://s...s/ZFDC%20Board/ZFDC.htm">... [ read more ] |
TRS 80 Model 12by billdeg Total messages in this thread: 1  S/N plate for a TRS 80 Model 12 26-4004 computer. 64K, one 8" disk drive.
After making a few diskcopies the power supply failed, there is no 12V. So I decided to remove the disk drive for use with my Catweasel system project.
This thread contains notes to make re-assembly of the system easier.
Note that the ground wire that connects the power supply to the monitor needs to be re-connected.
Some reference photos of TRS 80 Model 12 power supply and the factory setting jumpers for TM 848 drive for use in a TRS 80 Model 12. If you come upon this thread and you're trying to restore a model 12 by replacing the TM 848, these pictures will help you se">... [ read more ]
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Catweasel / Disk Archivesby billdeg Total messages in this thread: 1 This log will contain info on using the catweasel MK4plus PCI card to image Tandy 8" disks. I have dedicated a PC to this purpose. I have two projects in progress at the moment 1. Archive Atari 800 format disks 2. Archive TRS 80 8" disks So far I have set up the system and ran a few "easy" tests involving IBM disks and then an Atari Antic disk. So far so good. Here is a link to Dave dunfield's page about cabling a 8" drive to a 5 1/4" cable. http://www.cla...g29374/cnct.htm Here is a vendor who sells an adapter that converts the 5 1/4" or 3.5" disk cable signal for an 8" drive http://www.dbit.com/fdadap.html (the 5 1/4" HD = 8" drive as far as most disk controllers are concerned in general.) Program for reading TRS 80 disks cw2dmk on Tim Mann's web site?">... [ read more ] |
CBM 8088 co-processor schematic / ROMby billdeg Total messages in this thread: 1 Scanned schematic and 8088/6509 interprocess communications ROM from the original CBM document. (or a 1st gen copy). With this you can build your own 8088 co processor for your B series Commodore. download">... [ read more ] |
Houston Instrument DMP-29 Plotterby billdeg Total messages in this thread: 1  This Houston Instrument company model DMP-29 Digital Plotter.
 A kit was made available to interface this plotter with a TRS 80 Model I computer, and probably the model III/4.
Houston Instrument was a division (or acquired by) Bausch and Lomb, who was active in the computer hardware business during the 1980s.
More pictures">... [ read more ]
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TRON 3D Vintage Computer Sigtingsby billdeg Total messages in this thread: 1 Allow me to claim first report of the following in the Flynn arcade back office / computer lab 1. Digital RL01 drives in a rack with an 11/34 or 11/70 on the bottom 2. Commodore 1571 drive (it was a prop on the bottom shelf of a little end table, covered with dust) There were other misc. devices, but nothing that I could identify In the young Flynn's room was a 3. MacIntosh SE of some sort.">... [ read more ] |
Retro Computing Roundtable Podcast #4by billdeg Total messages in this thread: 1 Retro Computing Roundtable podcast. http://bit.ly/iazQ2S David Greelish (host) Earl Evans Jason Scott Bill Degnan (me)">... [ read more ] |
The TRS-80 Digitizer - An Early Scannerby billdeg Total messages in this thread: 1  The TRS-80 Digitizer was an early document scanner that was primarily used by Model 1 and Coco users. The scanner was primitive and was not used for business applications.
More pics
More Info:
http://www.trs-80...gitizer/
The TRS-80 Digitizer 26-1195">... [ read more ]
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PDF Scan of selected pages from the Commodore 8032 64K Memory Expansion Board User Guide.">... [ read more ]