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Hot Rodding Your Commodore 64 / C-128by billdeg Total messages in this thread: 2 Updated: [ iUEC Drive Browser Utility ] 01/12/2013  Picked up one of these uIEC units, with a custom case, at the Vintage Computer Festival MidWest. Jim Brain invented the uIEC. It's an SD card reader that works on any Commodore system that can attach to a 1541 drive, plus it includes JiffyDOS. With JiffyDOS and the uIEC, you achieve the luxury of subdirectories and fast access to thousands of programs. Amazing.
BUY THE uIEC:
http://store.go4r...ducts/uIEC_SD.html
I am amazed at the modern after-market C64 hardware products that keep Commodore systems connected to today's hardware.
My "every day" JiffyDOS C-128 System. I recently replaced the keyboard, that's why it looks a tad darker than the rest of the system. Since this picture was taken I fixed the red LED.">... [ read more ]
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Intel MDS 720 Dual 8 inch disk driveby billdeg Total messages in this thread: 2 Updated: [ Shugart 800 Jumpers Intel MDS 720 ] 09/30/2012  The Intel-branded model MDS 720 dual 8 inch disk drive enclosure. Click image for larger view.
The "before" image before restoration starts. These are very rare, I could not find any info about this drive on the web, but it looks to have Shugart 800's in it. We'll see...
pics">... [ read more ]
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Epson Geneva PX-8by billdeg Total messages in this thread: 3 Updated: [ Epson PF-10 Disk Drive ] 09/24/2012 The Epson Geneva PX-8 was an early LCD laptop from Epson. It ran CP/M and used a Z-80 processor. The standard storage was a mini cassette, but an external 3.5" disk drive was available. I have done some preliminary testing of this system, the LCD is a little weak. Fortunately I have a replacement display. I have the complete documentation and extra parts as well as the complete system. In addition to the PX-8 system I have a CX-80 Acoustic Coupler modem, a PF-10 external 3.5" disk drive, and Dbase II, The "Travelers Pack", and the Epson Software Libarary software. UPDATE: Looking for the utility disk that came with the PF-10 disk drive.">... [ read more ] |
Vintage Computer Festival MW 2012by billdeg Total messages in this thread: 1  Exhibitors setting up their booths in the ECCC room
 Nick brought his restored PDP 8 front panel-driven 6800 processor S-100 computer. We look forward to more developments with this system. Click image for larger view. (More photos link below.)
 The whole C-64 scene is vibrant and connected to today's computing. Here is a C-64C with a Commodore Flyer Internet Modem + Disk Drive Emulator Click image for larger view.
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Digital VT 102 Terminalsby billdeg Total messages in this thread: 5 Updated: [ Repairing dead vt102 ] 09/19/2012  Digital VT-102 Terminal
Picked up 4 of these, I will make one working unit, sell/donate the rest.
More Pics">... [ read more ]
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A Sick IBM 5170 ATby billdeg Total messages in this thread: 3 Updated: [ IBM AT 5170 update ] 08/26/2012  The IBM AT Model 5170 front-left
 Display when the system was working perfectly, all software running normally.
I removed the battery. Now the system does not recognize the hard drive, and the display mode is in 40-columns. Unlike the IBM PC/XT, the system configuration is stored in memory ROM requiring battery power.
 The IMI 5012H is I am told a clone of the Shugart ST-512, which is a type 1 drive.
I verified that the jumpers on the motherboard were OK. I was not able to find the manual for the IMI 5012H.
NEXT: Run the AT diagnostics, guess/assume that the drive type is "1", and see what happens. If it's not a type">... [ read more ]
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CorData Technologies, Inc. Cordata PPCby billdeg Total messages in this thread: 3 Updated: [ Next steps ] 08/26/2012 Here's a rare one...The 1985 CorData Technologies, Inc. cordata PPC computer. The logo on the machine looks similar to the Corona Data Systems' logo, but there's no reference to this model within the Corona catalog. Corona is kind of close to Cordata...Maybe they changed their name late in the game? Pics">... [ read more ] |
Cybernetic Systems Inc. Mathiputerby billdeg Total messages in this thread: 2 Updated: [ Mathiputer Diagnostics ] 08/26/2012  The 1975 Cybernetic Systems, Inc Mathiputer. Click image for larger view.
This device is intended to instruct children on basic math skills. Not functional, needs to be cleaned and tested. more to come.">... [ read more ]
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TRS 80 Model 4P Repairby billdeg Total messages in this thread: 1  This is a program I use to test RAM on a TRS 80 Model 4 / 4P. It will id whether you have 64K or 128K and run through a test pattern on the screen to test video RAM as well. I forget the company who made it. Note the "128K" in the upper right corner.
I learned something while repairing a customer's two TRS 80 Model 4P computers. If you have 128K installed and the system does not boot (gives you CRC error during POST of the OS disk), try removing the back 64K RAM (remember to move the jumper back to 64K mode) before you assume it's the disk drive.
There have been times when I thought the CRC error was always due to disk drive not being able to load the OS, when it was actually the RAM in error. It's a lot easier to find and replace a bad RAM chip, even if you have to do it one at">... [ read more ]
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MITS Altair 8800 Power Supplyby billdeg Total messages in this thread: 1  Pictured is a MITS accessory box. No I do not have original MITS power supplies for sale or otherwise.
ALTAIR 8800 original power supply specifications (at the end):
(From Dan Roganti [CORRECTED])
T1 transformer
Output = 8VAC, 8A
This is used to power the TTL logic on the cards in the backplane(+5V). It was very underpowered
when many of the slots were populated with cards.
T2 transformer (dual output) :
This is just a strange part just so they can have a separate 8VAC power supply. This is a "nice-to-have" part but
it's entirely unnecessary. Because the Front Panel can't operate without power on the CPU and the CPU can't
operate without power on the Front Panel. They just had some unwarrant">... [ read more ]
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Hewlett Packard 9835Bby billdeg Total messages in this thread: 2 Updated: [ Testing the HP 9835B ] 08/03/2012  The Hewlett Packard 9835B computer. Click image for larger view.
Untested. More to come.
pics
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Hope 9 - July 13-15 2012by billdeg Total messages in this thread: 2 Updated: [ History of Portable Hacks Talk at HOPE 9 ] 08/01/2012  The MidAtlantic Retro Computing Hobbyists exhibited single board computers and trainers at the 2012 HOPE 9 convention in NYC July 13-15. Among the systems exhibited was this replica Apple 1 computer. Click image for larger view.
 Here's Jeff telling tales of computing days past to an interested booth visitor. Jeff helped man the exhibit booth for 12 hours at a time, the club owes a lot to him for sharing his knowledge and his dedication to the club. Click image for larger view.
 ... [ read more ]
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PERQ System F Workstation Computerby billdeg Total messages in this thread: 1  The PERQ System F workstation computer is I believe the first commercial workstation, if you don't include the Xerox Alto.
She's filthy and missing the keyboard but this is quite rare.
pics">... [ read more ]
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Tandy TRS 80 Model 16Bby billdeg Total messages in this thread: 1  Here is a TRS 80 Model 16B, capable of running both Model II / 12's Z80 software and Motorola 68000 XENIX.
Ran a quick test. Lit up the RIFA cap, but I noticed that the system flashed the expected request for a boot disk. Should be restorable. Keyboard status unknown.
pics">... [ read more ]
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