guy@auspex.auspex.com (Guy Harris) (04/08/90)
>The problem is that Sun uses different memory management hardware >between the '20s and the '30s, and its incompatible. The memory management hardware they use on the '030 machines is the memory management unit on the '030 chip; does support for that MMU (or perhaps the 68851 PMMU) exist for Mach for other platforms? That wouldn't necessarily get you all the way to a 3/80 or 3/4xx port, but it might be a start.
nawaf@im4u.osf.org (Nawaf Bitar) (04/10/90)
I have a pmap module for the 68030 and 68851 MMUs that is freely distributable (it's actually well-commented too). Send me mail if you would like a copy. Cheers, Nawaf nawaf@osf.osf.org
cyliao@eng.umd.edu (Chun-Yao Liao) (04/14/90)
In article <197@trwacs.UUCP> epstein@trwacs.UUCP (Jeremy Epstein) writes: >Mach 2.5 as delivered by CMU only supports the 68020 CPU on Sun systems. >That means that the 3/80 (which is a 68030) will NOT work. The problem >is that Sun uses different memory management hardware between the '20s >and the '30s, and its incompatible. Excuse me for my ignorance... isn't Mach 2.5 newer than Mach 2.0? At least I KNOW Mach 2.0 is running on one 68030 based machine, NeXT, so why 2.5 doesn't support 68030? or I'm just talking nonsenses? -- cyliao@wam.umd.edu o NeXT : I put main frame power on two chips. @epsl.umd.edu o people: We put main flame power on two guys. @bagend.eng.umd.edu o :::::::::::::::::::::::::::::::::::::::::::: xxxxx@xxxxx.xxx.xxx (reserved) o RC + Apple // + Classic Music + NeXT = cyliao