mirror of
https://github.com/garrettsworkshop/GWRAM.SYSTEM.git
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58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
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#ifndef RAM2E_SAVE_H
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#define RAM2E_SAVE_H
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static char _rwsave[256];
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static char _rwsave0_1;
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static char _rwsave0_2;
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static char _rwsave0_3;
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static void ramworks_save() {
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__asm__("sta $C009"); // Store in ALTZP
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// Save address 0x0000 in every bank
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__asm__("ldx #0");
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saveloop:
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__asm__("stx $C073");
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__asm__("lda $00,X");
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__asm__("sta %v,X", _rwsave);
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__asm__("inx");
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__asm__("bne %g", saveloop);
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// Save addresses 0x0001-3 in bank 0
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__asm__("ldx #0");
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__asm__("stx $C073");
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__asm__("lda $01");
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__asm__("sta %v", _rwsave0_1);
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__asm__("lda $02");
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__asm__("sta %v", _rwsave0_2);
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__asm__("lda $03");
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__asm__("sta %v", _rwsave0_3);
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__asm__("sta $C008"); // Don't store in ALTZP
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}
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static void ramworks_restore() {
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__asm__("sta $C009"); // Store in ALTZP
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// Restore address 0x0000 in every bank
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__asm__("ldx #0");
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restoreloop:
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__asm__("stx $C073");
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__asm__("lda %v,X", _rwsave);
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__asm__("sta $00,X");
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__asm__("inx");
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__asm__("bne %g", restoreloop);
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// Restore addresses 0x0001-3 in bank 0
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__asm__("ldx #0");
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__asm__("stx $C073");
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__asm__("lda %v", _rwsave0_1);
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__asm__("sta $01");
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__asm__("lda %v", _rwsave0_2);
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__asm__("sta $02");
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__asm__("lda %v", _rwsave0_3);
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__asm__("sta $03");
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__asm__("sta $C008"); // Don't store in ALTZP
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}
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#endif
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