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Messages - HofMar

#1
CBM-II hardware / Re: 324866-03A Kernal DIN
January 06, 2011, 08:44 AM
Browsing through zimmers.net i found the kern700din.bin from Oliver Fleischmann. These two versions (324866-03A and kern700din.bin) have two bytes changed. The first difference is at FA1E. This is the ioinit routine. Normaly in all kernal version 901244-xx and the kern700din.bin, it contains:
fa19 sty tri2+pa
     sty tri1+pb
     sty tri2+ddpa
     sty tri2+ddpb
     lsr tri2+pa
     iny
     sty tri2+pc
     sty tri2+ddpc

But that must be wrong. Only tri2 is for the keyboard, and code above is the init routine for the keyboard TPI (6523) at DFxx.
Only the 324866-03A DIN Kernal contains the correct code for
     sty tri2+pb
The second difference is the changed Checksum at FFF9.

Gretings

Martin