Amardeep-AC9MF's latest activity

Well, I didn't get that far since the high voltage wasn't working I just put it away until I figure out what to do next. I'll try the...

Did some further work on the machine. The power supply had some cracking Rifa line filters so I replaced those. Nice steady output on...

Welcome to the fun world of CP/M and 8bit computing. It is a great testament to CP/M's design elegance, portability and simplicity that...

Was browsing Ebay for something else when I see a familiar shape on the thumbnails... could it be? yes it was!, immediately ordered one...

By the way, the original CP/M was FM disks and used the worst-case data pattern of hex E5 for the blank sector data, and thusly the...

I found an older (1980) version of the Cromix manual which only describes use of the 64KZ and no other RAM boards - which matches your...

I just quoted what the Z80 Cromix Admin Manual said. Perhaps it was a later version published after the original 64KZ had been...

Actually I think that board is the only static RAM board I've seen that will work (it is new to me). It fully implements the bank...

Are you certain 64KZ are not supported by Z80 Cromix? Mine seem to work fine. Back in the day my 11.27 system ran on a set of CCS 2066...

For Z80 Cromix (versions up to 11.27) you need a Z80 CPU, a 16FDC with modifications to support the Shugart drives, and a minimum of two...

If you find the 8048 is bad, we can work out a mutually beneficial arrangement. Lend me the keyboard for a couple of weeks. I will...

You are correct there is some info in the service manual, see from page 184, there are timing diagrams, etc. Here is the chip layout...

I understand the service manual gives some data on the various custom logic parts, perhaps enough to reproduce it. Have you checked there?

Wow that's small, even for 8048 code. They barely even used page 3.

did you look at http://bitsavers.org/pdf/qume/terminal/QVT-102/QVT-102_kbd the firmware is in...