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MICROWORLD / 1980 Video

by billdeg - 03/30/2011
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 80

by billdeg - 03/22/2011
Total messages in this thread: 2
Last Post: [ 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 ]

Bring up CPM3 for the first time

by monahan_z - 03/01/2011
Total messages in this thread: 4
Last Post: [ 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 Laptop

by billdeg - 03/17/2009
Total messages in this thread: 2
Last Post: [ 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 ]

Vintage Computer Festival East 7.0

by billdeg - 02/19/2011
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 Computer

by billdeg - 12/29/2010
Total messages in this thread: 3
Last Post: [ 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 ]

A New FDC Board for S-100 Systems

by monahan_z - 02/02/2011
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 12

by billdeg - 01/29/2011
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 ]

Catweasel / Disk Archives

by billdeg - 01/27/2011
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 / ROM

by billdeg - 01/09/2011
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 Plotter

by billdeg - 12/29/2010
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 ]

TRON 3D Vintage Computer Sigtings

by billdeg - 12/28/2010
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 #4

by billdeg - 12/22/2010
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 Scanner

by billdeg - 12/20/2010
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 ]

NEC Spinwriter 3530 Printer

by billdeg - 12/20/2010
Total messages in this thread: 1

Before making an attempt to break into the computer and computer display markets, NEC was most known for it's high quality business printers.
Before laser printers replaced them, the daisywheel-type printer was the standard for business / office printing. The 3530 was popular in the early 1980's. pics ... [ read more ]
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