Guides:Fast 0x1500 ACE: Difference between revisions
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D6 FF sub $FF ; a = $01 |
D6 FF sub $FF ; a = $01 |
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EA 84 FB ld ($FB84), a |
EA 84 FB ld ($FB84), a |
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E1 pop hl |
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E1 pop hl ; first of two pops to prevent side effects of 0x1500 ACE |
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F6 FF or $FF ; a = $FF |
F6 FF or $FF ; a = $FF |
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50 ld d, b |
50 ld d, b |
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D4 81 FB call nc, $FB81 ; $FB81 was rewritten to 21 59 D8 01 32 00 C3 41 30 |
D4 81 FB call nc, $FB81 ; $FB81 was rewritten to 21 59 D8 01 32 00 C3 41 30 |
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EA 82 FB ld ($FB82), a ; Replace $59 by $FF to prevent possible crash when viewing $59 as text |
EA 82 FB ld ($FB82), a ; Replace $59 by $FF to prevent possible crash when viewing $59 as text |
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E1 pop hl |
|||
E1 pop hl ; second of two pops to prevent side effects of 0x1500 ACE |
|||
D6 50 sub $50 ; a = $AF |
D6 50 sub $50 ; a = $AF |
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| Line 663: | Line 663: | ||
D6 FF sub $FF ; a = $01 |
D6 FF sub $FF ; a = $01 |
||
EA 84 FB ld ($FB84), a |
EA 84 FB ld ($FB84), a |
||
E1 pop hl |
|||
E1 pop hl ; first of two pops to prevent side effects of 0x1500 ACE |
|||
F6 FF or $FF ; a = $FF |
F6 FF or $FF ; a = $FF |
||
50 ld d, b |
50 ld d, b |
||
| Line 670: | Line 670: | ||
D4 81 FB call nc, $FB81 ; $FB81 was rewritten to 21 59 D8 01 32 00 C3 2F 30 |
D4 81 FB call nc, $FB81 ; $FB81 was rewritten to 21 59 D8 01 32 00 C3 2F 30 |
||
EA 82 FB ld ($FB82), a ; Replace $59 by $FF to prevent possible crash when viewing $59 as text |
EA 82 FB ld ($FB82), a ; Replace $59 by $FF to prevent possible crash when viewing $59 as text |
||
E1 pop hl |
|||
E1 pop hl ; second of two pops to prevent side effects of 0x1500 ACE |
|||
D6 50 sub $50 ; a = $AF |
D6 50 sub $50 ; a = $AF |
||
| Line 770: | Line 770: | ||
D6 FF sub $FF ; a = $01 |
D6 FF sub $FF ; a = $01 |
||
EA 84 FB ld ($FB84), a |
EA 84 FB ld ($FB84), a |
||
E1 pop hl |
|||
E1 pop hl ; first of two pops to prevent side effects of 0x1500 ACE |
|||
F6 FF or $FF ; a = $FF |
F6 FF or $FF ; a = $FF |
||
50 ld d, b |
50 ld d, b |
||
| Line 777: | Line 777: | ||
D4 81 FB call nc, $FB81 ; $FB81 was rewritten to 21 59 D8 01 32 00 C3 2B 30 |
D4 81 FB call nc, $FB81 ; $FB81 was rewritten to 21 59 D8 01 32 00 C3 2B 30 |
||
EA 82 FB ld ($FB82), a ; Replace $59 by $FF to prevent possible crash when viewing $59 as text |
EA 82 FB ld ($FB82), a ; Replace $59 by $FF to prevent possible crash when viewing $59 as text |
||
E1 pop hl |
|||
E1 pop hl ; second of two pops to prevent side effects of 0x1500 ACE |
|||
D6 50 sub $50 ; a = $AF |
D6 50 sub $50 ; a = $AF |
||