Mercurial > repos > blastem
view fib.s68 @ 1042:a6c6b621d0dc
Implement Z80 DAA. Implement half-carry flag for the rest of the "easy" cases. Implement flags for IN instruction. Fix implementation of IN for IN F, (C) case
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 24 Jul 2016 17:17:59 -0700 |
parents | f664eeb55cb4 |
children | 2455662378ed f7fe240a7da6 |
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dc.l $0, start start: moveq #36, d0 bsr fib illegal fib: cmp.l #2, d0 blt base subq.l #1, d0 move.l d0, -(a7) bsr fib move.l (a7), d1 exg d0, d1 move.l d1, (a7) subq.l #1, d0 bsr fib move.l (a7)+, d1 add.l d1, d0 rts base: moveq #1, d0 rts