GWRAM.SYSTEM/ram2e_save.h

58 lines
1.2 KiB
C
Raw Normal View History

2023-09-30 00:55:19 +00:00
#ifndef RAM2E_SAVE_H
#define RAM2E_SAVE_H
static char _rwsave[256];
static char _rwsave0_1;
static char _rwsave0_2;
static char _rwsave0_3;
static void ramworks_save() {
__asm__("sta $C009"); // Store in ALTZP
// Save address 0x0000 in every bank
__asm__("ldx #0");
saveloop:
__asm__("stx $C073");
__asm__("lda $00,X");
__asm__("sta %v,X", _rwsave);
__asm__("inx");
__asm__("bne %g", saveloop);
// Save addresses 0x0001-3 in bank 0
__asm__("ldx #0");
__asm__("stx $C073");
__asm__("lda $01");
__asm__("sta %v", _rwsave0_1);
__asm__("lda $02");
__asm__("sta %v", _rwsave0_2);
__asm__("lda $03");
__asm__("sta %v", _rwsave0_3);
__asm__("sta $C008"); // Don't store in ALTZP
}
static void ramworks_restore() {
__asm__("sta $C009"); // Store in ALTZP
// Restore address 0x0000 in every bank
__asm__("ldx #0");
restoreloop:
__asm__("stx $C073");
__asm__("lda %v,X", _rwsave);
__asm__("sta $00,X");
__asm__("inx");
__asm__("bne %g", restoreloop);
// Restore addresses 0x0001-3 in bank 0
__asm__("ldx #0");
__asm__("stx $C073");
__asm__("lda %v", _rwsave0_1);
__asm__("sta $01");
__asm__("lda %v", _rwsave0_2);
__asm__("sta $02");
__asm__("lda %v", _rwsave0_3);
__asm__("sta $03");
__asm__("sta $C008"); // Don't store in ALTZP
}
#endif