On Wed 11 Jul 2012 at 05:20:17 +0000, William Levak wrote: > I don't see how the chip is initialized. We know the shift > registers start with 214 in them. Also the output register. Since I was thinking that the output register, being 8 toggle flip-flops, could simply be wired to use the not-Q outputs for the bits that start out as 1. As for the shift registers, that would probably work differently; there are D-flipflops with reset circuits (and presumably everything in the 6702 is wired to the reset line), so I spuppose some of the bits in them could be wired to reset to 1 instead of 0. There is something special about the number 214 though, since it also occurs (ok, as 214 + 1) in the 6809 machine code routine. -Olaf. -- ___ Olaf 'Rhialto' Seibert -- There's no point being grown-up if you \X/ rhialto/at/xs4all.nl -- can't be childish sometimes. -The 4th Doctor Message was sent through the cbm-hackers mailing listReceived on 2012-07-11 17:00:26
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