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Hi, I have a "computer" - its actually a digital carillon system implemented as an embedded system - that uses Y2K era PCMCIA linear flash ( memory mapped ) cards to store music and system backups. These are various models of 1MB ( 1 x8 bit ) linear flash cards. They have various part...

Hi, I have a AT&T 4425 Teletype Terminal I am trying to restore for daily use by some students. I am having to give up on restoring the original Astec AA12433 PSU ( -12v, +5v, +12 ). It has a TTL "DC OK" signal which goes high or low depending on all three outputs reaching the proper...

I'm looking for anything from a complete NCR Tower/32 200 system to service info / OS load tapes, whatever. If you have or know of one, let me know. Thanks! -- Bob

I have a number of AT&T 4425 Teletype Terminals which I have been able to restore to working condition. For all of these, when I first got them, presumably after many years of being unused, they had a weird phenomenon. After being off, they would not POST, or after being let sit with power on...

I have TWO AT&T 4425 terminals circa 1983. One of them had minor character generation issues, with a few letters which displayed improperly. On pulling and dumping the ROM I found it was damaged: And for the most part the characters being displayed incorrectly were those from the 80...

I have a video issue with a "fat" Mac 512K, which is pretty much unaltered. Last winter I was able to get it both floppy drives lubed up and happy and fixed an issue with the drive interfaces, getting it bootable. The final issue is a slight vertical non-linearity in the top of the display...

Hi, I'm Bob. My parents got me an Atari for Christmas in 1981 and "the only cartridge left on the shelves" - the Assembler / Editor cartridge. So while veryone else was playing games, I was trying to figure out how to make 20000 cycles of animation fit into 8000 cycles of vertical blank...

Hi, I have an NCR Tower 32/200 ( and 1987-1990 vintage Unix 1.1.x install tapes, and a complete set of user manuals ) which I have had since 1994. Unfortunately NVRAM battery caused damage and the system will boot into SUS BIOS with every other character missing. In this pre-boot environment...