Re: ADB controllerchip is a 65xxx

[nparker@cie-2.uoregon.edu (Neil Parker)]

In article <44m3kl$g1n@marina.scn.de> nettkon@scn.de (Geir Olsen) writes:
>I'm just wondering if anyone has notices that the ADB controllers (at
>least inside the IIGS) is a Mitshubishi 65 derivat !
>Mitshubishe has alot of the nice 65xxx (also 16bit series) micro-
>controllers (up to VERY high speed)... They're quit nice
>I've qorked with them !

Yeah, I've noticed.  The MM50740 instruction set is a lot like the 65C02,
but with just enough differences to make disassembly using the Apple
monitor's "L" command a real pain.

One of the numerous unfinished projects sitting in my disk library is
a MM50740 disassembler that I started writing when I got sick and tired
of trying to disassemble the ADB ROM by hand.  Unfortunately, my enthusiasm
for that project dwindled before the disassembler was functional.

               - Neil Parker
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