(classic) Add Compucolor II support

[suborb]

Specs

• 8080 @2Mhz
• ROM: 16gb
• RAM: 8, 16, 32
• Display: 64x32 characters, 8 colours, giving 128x128 lores graphics
• Floppy: 40 tracks, 10 sectors/track, 128 bytes/sector (50 KB / disk)
• RS232 etc

Memory map:

• 0x0000 - 0x3FFF | 16 KB of ROM (BASIC and FCS)
• 0x4000 - 0x5FFF | empty 8 KB range
• 0x6000 - 0x6FFF | fast access to 4KB of video RAM
• 0x7000 - 0x7FFF | normal access to 4KB of video RAM
• 0x8000 - 0xFFFF | Up to 32 KB of program RAM

This would be our first pure 8080 computer so is probably worth doing unless there are some easier 8080/5 targets to tackle first of all.

Most details including an emulator can be found here: http://www.compucolor.org

The floppy format is a bit funky, but the DOS can support loading bytes into memory directly so in that respect it's fairly straightforward.

[suborb]

It's been the best part of two years, I'm never going to do this, closing.