I'm trying to find a couple of pieces of info that don't appear to be written down anywhere obvious(not in the manuals, and not in a way I can just extract it from Sim Coupe)
1. How are the serial ports mapped onto EC. The device used has both data and control/status registers so I assume some of the high bits select. From the schematic I am guessing A0-A2 are taken from bits 8-10 of the I/O port ?
2. What does BOOT expect for a bootable disk, what does it load, where does it load from and what state is the machine in (memory map wise in particular) when it transfers control ?
Trying to port an OS to Sam (or Sim anyway) Coupe.