(SOLVED) 41CL - DOUBLE HEPAX ACCESS and MMU CONFIG

[Sylvain Cote]

(08-22-2019 09:31 PM)rprosperi Wrote:  

(08-22-2019 07:52 PM)Monte Dalrymple Wrote:  But I just remembered that Hepax thinks that the RAM is only 10 bits wide. Not so the MMU registers/41CL RAM, so it's going to take some futzing (that's a technical term :-) ) with the data. Geir Isene had to handle this when he did the HP-IL update stuff, so I would look at that code as a starting point.

POP!!!
Yeah, that was my bubble...
That 10-bit ROM address in the 41 has always been a real pain in the neck. Some have even a lower opinion...

LOL ... may I add another POP!!! ... ROTFL
The 10-bit is the instruction width of the Nut CPU, the addressing (PC) is 16-bit wide (64K or 16 pages of 4K).