Once the floppy controller is hooked up and anyone is attempting to boot:

The screen will remain blank, and the machine will just sit there until you press "b" for boot.

Robert

thanks for this, very helpfull.

I went through the technical manual again to understand the actual memory map better, how RAM and ROM interact. I think this should be correct, although I have no idea how to put it into software ;-)

I also made a table of the I/O ports, although I'm not sure if that's generic Z80 stuff or machine specific.

The video chip used is already in /src/emu/video/tms9927.c

ITT 3030 Memory and Port Map

Robert

While sorting through stuff in my basement I found a pile of paper which turned out to be more system information on the ITT 3030.

ITT 3030 Technical Information

As this is a rather large PDF file, I've extracted the first two pages, which are an English data sheet about the elusive MK3886 Z80 combo chip.

MK 3886 data sheet

Robert

Both links are the same.

Thanks, Robbbert ... Link is edited.

Robert