6502 ISA / Port

[Kroc]

ISA:

• [ ] Support 6502/10 invalid instructions
• [ ] Support 65C02 instructions

Pre-requisites:

• #2 to make v80 even more data-driven and minimise the amount of Z80 code that has to be directly ported

Target systems / platforms?

• CPM65 would allow an easy landing-site for porting from Z80 CP/M
• Commodore 64. Ironically has limited RAM due to complex RAM layout!
• Apple II. Large user base. Varied hardware configs? (AppleDOS / ProDOS?) Start with a Z80 CP/M port to the Apple SoftCard?
• Modern 6502 systems:
  • neo6502
  • CommanderX16