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Hi. I have recently acquired a Lynx 470, with manual and cables. It's in really good shape; the only problem is that it doesn't work. All the LEDs light up in test mode (I replaced the barely visible red ones with high efficiency ones, and a larger resistor to dim them a bit). The whole...

I have downloaded the ACS8000-12 manuals, part 1, part 2, schematics. I have traced the outputs of the address decoder, and they match what is shown in the manuals. The manual shows the magnetic tape unit (MTU) being addressed at 38H-3BH. This prom seems to reference tape interface at...

Bleh. Still doesn't want to talk to me. I'll have to figure out how to do state analysis with my logic analyzer to see what it's doing. (Also needed for my SBC-100.) What's worse, it now sounds like the hard disk heads have crashed. :-( But it did activate the floppy drive a couple of...

Thanks. I'll try that.

I have acquired an ALTOS 8000-12A. After fixing a few issues I still wasn't getting anything sensible from the console port so I checked the EPROM. Mostly 0's. (Same thing happened with a SBC-100 I have, still haven't got that one going yet.) Can anyone point me to where I can find an EPROM...

Hi. I'm looking for a users manual for a Zilog MPB board. This goes into their MCZ program development system, has a 122-pin edge connector. I have photocopies of MPB/B (later version) and MCB (another CPU, but not at all the same), and for many other of the PDS boards. Just not this one...

WTB: A Zilog Z8000 MCB as seen here: https://github.com/sebhc/sebhc/blob/master/mcz/pics/PCB05Z8000.png I have software and manuals, copied from when I worked with one 30 years ago. I also have a couple of MCZ systems I can drop it into. I'm willing to pay good money for one. Thanks, Steve