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Subject: [stella] Ballblazer Demo Subroutines From: Manuel Polik <cybergoth@xxxxxxxx> Date: Wed, 25 Sep 2002 09:07:06 +0200 |
Hi Rob!
If you ever consider to continue your work on the Ballblazer thing,
consider using these:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; RotateLeft
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
RotateLeft:
CLC
ROR PF2Data
ROL PF1Data
ROR PF0Data
LDA PF0Data
AND #$08
BEQ Ok2
LDA PF2Data
ORA #$80
STA PF2Data
Ok2
RTS
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; RotateRight
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
RotateRight:
CLC
ROL PF0Data
ROR PF1Data
ROL PF2Data
BCC Ok
LDA PF0Data
ORA #$10
STA PF0Data
Ok
RTS
:-)
Greetings,
Manuel
--
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