Home Page Forums MAME MAME Driver writing challenge: Regnecentralen RC702

Since I'm not planning to work on this any time soon, here's a challenge for someone (maybe it's a good project for a potential new developer too?) to write a MAME driver for the Regnecentralen RC702. This is an early Danish computer that can run CP/M.

There is a lot of info available, including an emulator and a technical manual (in English). Everything (including bootloader and character generator ROMs) can be found on this site: http://www.jbox.dk/rc702/index.shtm

This is very cool I think, I have an Altos 8000 with dual 8" floppies, Z80 and CP/M in my garage that I got cheap on a flea market that I intend to do later. There is probably some similarities between the two, so count me in as collaborator. Also I have a soft spot for scandinavian retro computers.

I have done what I can with this, the result looks just like the above photo.

However I cannot get it to recognise a floppy disk. If anyone wants to look at that, please do.

Internally, the system is made for 8 inch and 5 1/4 inch drives, however at this time I have hardwired the 5 1/4 inch settings until it can be made to work. The FDC is a uPD765.

There's lots more things to be done, but it's rather pointless while it won't read the disk.