Apple-2-SW/GWRAM.SYSTEM
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Read apple key now in C, compiles to same instructions

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This commit is contained in:
Zane Kaminski 2020-05-21 19:09:11 -04:00
parent 1b18fa1c67
commit d5c4fcc209
1 changed files with 3 additions and 7 deletions
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10
ram2e.c
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@ -8,13 +8,9 @@
#define true 1
#define false 0
static char read_applekey(void) {
/*__asm__("lda $C061");
__asm__("ora $C062");
__asm__("and #$80");
__asm__("ldx #0");*/
return (*((char*)0xC061) | *((char*)0xC062)) & 0x80;
}
#define PB0 ((char*)0xC061)
#define PB1 ((char*)0xC062)
static char read_applekey(void) { return (*PB0 | *PB1) & 0x80; }
static void ram2e_cmd(char operation, char data) {
// Load operation and data bytes into X and Y registers