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Rework sprite rendering phase 3 to better match behavior documented by Kabuto/Titan and fix edge case in sprite overflow flag that was breaking the RPS minigame in Alex Kidd
author Michael Pavone <pavone@retrodev.com>
date Thu, 20 Jun 2019 22:31:31 -0700
parents f7fe240a7da6
children b7ecd0d6a77b
line wrap: on
line source

    dc.l $0, start
start:
	moveq #42, d0
	bsr fib
	reset
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