Subject: Re: [stella] Ruffin Bailey's Disassembly of missile.bin From: Ruffin Bailey <rufbo1@xxxxxxxxxxx> Date: Mon, 24 Jun 2002 22:00:38 -0400 |
Not sure why I use the accumulator to initialize HMM0 and then immediately use the Y register to do the same thing in this code:
LDA #$00 ;2
STA HMM0 ;3
LDA SWCHA ;4 SWCHA dissection
BMI LF065 ;2 Player 0 | Player 1
LDY #$00 ;2 ===============|===============
STY HMM0 ;3 D7 D6 D5 D4 | D3 D2 D1 D0
LDA #$00 ;2 STA HMM0 ;3 LDA SWCHA ;4 SWCHA dissection BMI LF065 ;2 Player 0 | Player 1 LDY #$F0 ;2 ===============|=============== STY HMM0 ;3 D7 D6 D5 D4 | D3 D2 D1 D0 LF065: ROL ;2 rt lt dn up | rt lt dn up
Ruffin Bailey http://myfreakinname.blogspot.com
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