Subject: Re: Odp: [stella] AOTM AFOS problems From: Manuel Rotschkar <cybergoth@xxxxxxxx> Date: Fri, 02 Jul 2004 00:14:56 +0200 |
I completely don't understand these routines that you have written.
UfoMissileActive LDY #0 ;+2 71 SEC ;+2 73 TXA ;+2 75 SBC Ufo_Missile_Y ;+3 78 ADC #6 ;+2 80 BCC SkipUfoMissileActive ;+2 82 LDY #2 ;+2 84 SkipUfoMissileActive STY ENAM1 ;+3 87
When it's set - Enable the missile. When it's clear - Disable the missile.
UfoMissileActive SEC ;+2 Set carry for subtraction TXA ;+2 Move line counter into A SBC Ufo_Missile_Y ;+3 Subtract missile position ADC #6 ;+2 Add missile height ROL ;+2 Move Carry into the first bit ROL ;+2 Move Carry into the second bit STA ENAM1 ;+3 Store second bit into ENAM
Greetings, Manuel
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