bandy@amdcad.AMD.COM (Andy Beals) (01/20/87)
Has anyone out there done the necessary modifications to their CPU-68K to plug in a MMU? Yes, I know that it would greatly complicate your life under CP/M68K, but it'd make porting Minix much much easier! Going to read my docs tonight, andy ps. Anyone have the manual for the Interfacer-4 board?
mknox@cad.Berkeley.EDU@ut-ngp.UUCP (01/24/87)
Actually, an MMU shouldn't do anything really tricky to CP/M-68K. Although it does not require memory mamnagement, it certainly does not preclude it. Most of my implementations involve a machine with base/limit registers (before the 68451, etc.), but the techniques are similar. I run two segments (think of it as two LARGE pages), no problem. Unfortunately, time has not permitted sticking in a 68010 and gtrying out veirtual memory operation. To bad, but then...anyone want to consider demand paging off a floppy! [Performance, what's that?]