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63ff28e94e
* non-asm macros can now take `const` and `call` parameters * register parameters to asm functions and macros can be given names if annotated explicitly
37 lines
700 B
Plaintext
37 lines
700 B
Plaintext
#if not(NES)
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#warn nes_mmc4 module should be only used on NES/Famicom targets
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#endif
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asm inline void set_prg_bank(byte register(a) bank) {
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STA $A000
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? RTS
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}
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// calling with with e.g. $1E will set $0000-$0fff to $E000-$EFFF in chrrom1
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asm inline void set_chr_bank0(byte register(a) bank) {
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STA $B000
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STA $C000
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? RTS
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}
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// calling with with e.g. $1E will set $1000-$1fff to $E000-$EFFF in chrrom1
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asm inline void set_chr_bank1(byte register(a) bank) {
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STA $D000
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STA $E000
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? RTS
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}
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// TODO: FD/FE latches
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asm inline void set_vertical_mirroring() {
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LDA #0
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STA $F000
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? RTS
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}
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asm inline void set_horizontal_mirroring() {
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LDA #1
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STA $F000
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? RTS
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}
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