diff options
Diffstat (limited to 'opcode_pc.h')
| -rw-r--r-- | opcode_pc.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/opcode_pc.h b/opcode_pc.h new file mode 100644 index 0000000..8a95db8 --- /dev/null +++ b/opcode_pc.h @@ -0,0 +1,46 @@ +#ifndef _OPCODEPC +#define _OPCODEPC +#include "CPU.h" + +enum _INSTRUCTION{ + ADC = 1, + LDA, + TAX, + BRK, + STA, + INX, +}; + +struct _OPCODE{ + enum _INSTRUCTION instruction; + enum adressing_mode mode; + int bytes; +}OPCODE[0xFF]; + +void init_opcode_pc(){ + /*LDA*/ + OPCODE[0xA9] = (struct _OPCODE){LDA, Immediate, 2}; + OPCODE[0xA5] = (struct _OPCODE){LDA, ZeroPage, 2}; + OPCODE[0xB5] = (struct _OPCODE){LDA, ZeroPage_X, 2}; + OPCODE[0XAD] = (struct _OPCODE){LDA, Absolute, 3}; + OPCODE[0xBD] = (struct _OPCODE){LDA, Absolute_X, 3}; + OPCODE[0xB9] = (struct _OPCODE){LDA, Absolute_Y, 3}; + OPCODE[0xA1] = (struct _OPCODE){LDA, Indirect_X, 2}; + OPCODE[0xB1] = (struct _OPCODE){LDA, Indirect_Y, 2}; + /*BRK*/ + OPCODE[0x00] = (struct _OPCODE){BRK, NoneAddressing, 1}; + /*TAX*/ + OPCODE[0xAA] = (struct _OPCODE){TAX, NoneAddressing, 1}; + /*STA*/ + OPCODE[0x85] = (struct _OPCODE){STA, ZeroPage, 2}; + OPCODE[0x95] = (struct _OPCODE){STA, ZeroPage_X, 2}; + OPCODE[0x8D] = (struct _OPCODE){STA, Absolute, 3}; + OPCODE[0x9D] = (struct _OPCODE){STA, Absolute_X, 3}; + OPCODE[0x99] = (struct _OPCODE){STA, Absolute_Y, 3}; + OPCODE[0x81] = (struct _OPCODE){STA, Indirect_X, 2}; + OPCODE[0x91] = (struct _OPCODE){STA, Indirect_Y, 2}; + /*INX*/ + OPCODE[0xE8] = (struct _OPCODE){INX, NoneAddressing, 1}; +} + +#endif
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