From: Marko Mäkelä (Marko.Makela_at_HUT.FI)
Date: 2002-04-19 10:41:19
Maciej Witkowiak <firstname.lastname@example.org> writes: > You are right. I just checked that. This should work in C128 mode > for writting, and in C64 mode $d500-ff behaves like unconnected > space. Why wouldn't it work for reading? If the address reads $ff, you can connect another chip there, and the values are wired-anded together (remember, this is NMOS logic, not CMOS). I don't remember if I made use of this property in my MMU expansion for the C128 (4 RAM banks instead of 2). Marko Message was sent through the cbm-hackers mailing list
Archive generated by hypermail 2.1.4.