mirror of
https://github.com/zellyn/go6502.git
synced 2024-06-15 18:29:47 +00:00
Move opcode metadata to separate package.
This commit is contained in:
Zellyn Hunter
parent
59a789746e
commit
f1299f6f7f
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@ -5,6 +5,8 @@ package asm
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import (
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"fmt"
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"github.com/zellyn/go6502/opcodes"
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)
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// bytesString takes three bytes and a length, returning the formatted
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@ -27,31 +29,31 @@ func addrString(pc uint16, byte1, byte2 byte, length int, mode int) string {
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addr16 := uint16(byte1) + uint16(byte2)<<8
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addrRel := uint16(int32(pc+2) + int32(int8(byte1)))
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switch mode {
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case MODE_IMPLIED:
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case opcodes.MODE_IMPLIED:
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return " "
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case MODE_ABSOLUTE:
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case opcodes.MODE_ABSOLUTE:
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return fmt.Sprintf("$%04X ", addr16)
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case MODE_INDIRECT:
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case opcodes.MODE_INDIRECT:
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return fmt.Sprintf("($%04X)", addr16)
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case MODE_RELATIVE:
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case opcodes.MODE_RELATIVE:
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return fmt.Sprintf("$%04X ", addrRel)
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case MODE_IMMEDIATE:
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case opcodes.MODE_IMMEDIATE:
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return fmt.Sprintf("#$%02X ", byte1)
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case MODE_ABS_X:
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case opcodes.MODE_ABS_X:
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return fmt.Sprintf("$%04X,X", addr16)
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case MODE_ABS_Y:
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case opcodes.MODE_ABS_Y:
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return fmt.Sprintf("$%04X,Y", addr16)
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case MODE_ZP:
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case opcodes.MODE_ZP:
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return fmt.Sprintf("$%02X ", byte1)
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case MODE_ZP_X:
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case opcodes.MODE_ZP_X:
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return fmt.Sprintf("$%02X,X ", byte1)
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case MODE_ZP_Y:
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case opcodes.MODE_ZP_Y:
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return fmt.Sprintf("$%02X,Y ", byte1)
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case MODE_INDIRECT_Y:
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case opcodes.MODE_INDIRECT_Y:
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return fmt.Sprintf("($%02X),Y", byte1)
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case MODE_INDIRECT_X:
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case opcodes.MODE_INDIRECT_X:
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return fmt.Sprintf("($%02X,X)", byte1)
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case MODE_A:
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case opcodes.MODE_A:
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return " "
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}
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panic(fmt.Sprintf("Unknown op mode: %d", mode))
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@ -62,11 +64,11 @@ func addrString(pc uint16, byte1, byte2 byte, length int, mode int) string {
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// instruction and address, and the length. If it cannot find the
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// instruction, it returns a 1-byte "???" instruction.
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func Disasm(pc uint16, byte0, byte1, byte2 byte) (string, string, int) {
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op, ok := Opcodes[byte0]
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op, ok := opcodes.Opcodes[byte0]
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if !ok {
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op = NoOp
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op = opcodes.NoOp
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}
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length := ModeLengths[op.Mode]
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length := opcodes.ModeLengths[op.Mode]
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bytes := bytesString(byte0, byte1, byte2, length)
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addr := addrString(pc, byte1, byte2, length, op.Mode)
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return bytes, op.Name + " " + addr, length
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236
asm/opcodes.go
236
asm/opcodes.go
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@ -1,236 +0,0 @@
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package asm
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// Opcode addressing modes.
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const (
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MODE_IMPLIED = iota
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MODE_ABSOLUTE
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MODE_INDIRECT
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MODE_RELATIVE
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MODE_IMMEDIATE
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MODE_ABS_X
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MODE_ABS_Y
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MODE_ZP
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MODE_ZP_X
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MODE_ZP_Y
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MODE_INDIRECT_Y
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MODE_INDIRECT_X
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MODE_A
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)
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// Lengths of instructions for each addressing mode.
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var ModeLengths = map[int]int{
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MODE_IMPLIED: 1,
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MODE_ABSOLUTE: 3,
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MODE_INDIRECT: 3,
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MODE_RELATIVE: 2,
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MODE_IMMEDIATE: 2,
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MODE_ABS_X: 3,
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MODE_ABS_Y: 3,
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MODE_ZP: 2,
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MODE_ZP_X: 2,
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MODE_ZP_Y: 2,
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MODE_INDIRECT_Y: 2,
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MODE_INDIRECT_X: 2,
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MODE_A: 1,
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}
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// Opcode stores information about instructions.
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type Opcode struct {
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Name string
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Mode int
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}
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// Fake NoOp instruction used when disassembling.
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var NoOp = Opcode{"???", MODE_IMPLIED}
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// The list of Opcodes.
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var Opcodes = map[byte]Opcode{
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// BUG(zellyn): Add 65C02 instructions.
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// Flag set and clear
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0x18: {"CLC", MODE_IMPLIED}, // CLC
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0xD8: {"CLD", MODE_IMPLIED}, // CLD
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0x58: {"CLI", MODE_IMPLIED}, // CLI
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0xB8: {"CLV", MODE_IMPLIED}, // CLV
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0x38: {"SEC", MODE_IMPLIED}, // SEC
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0xF8: {"SED", MODE_IMPLIED}, // SED
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0x78: {"SEI", MODE_IMPLIED}, // SEI
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// Very simple 1-opcode instructions
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0xEA: {"NOP", MODE_IMPLIED},
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0xAA: {"TAX", MODE_IMPLIED},
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0xA8: {"TAY", MODE_IMPLIED},
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0xBA: {"TSX", MODE_IMPLIED},
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0x8A: {"TXA", MODE_IMPLIED},
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0x9A: {"TXS", MODE_IMPLIED},
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0x98: {"TYA", MODE_IMPLIED},
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// Slightly more complex 1-opcode instructions
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0xCA: {"DEX", MODE_IMPLIED},
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0x88: {"DEY", MODE_IMPLIED},
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0xE8: {"INX", MODE_IMPLIED},
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0xC8: {"INY", MODE_IMPLIED},
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0x48: {"PHA", MODE_IMPLIED},
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0x08: {"PHP", MODE_IMPLIED},
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0x68: {"PLA", MODE_IMPLIED},
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0x28: {"PLP", MODE_IMPLIED},
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// Jumps, returns, etc.
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0x4C: {"JMP", MODE_ABSOLUTE},
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0x6C: {"JMP", MODE_INDIRECT},
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0x20: {"JSR", MODE_ABSOLUTE},
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0x60: {"RTS", MODE_IMPLIED},
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0x40: {"RTI", MODE_IMPLIED},
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0x00: {"BRK", MODE_IMPLIED},
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// Branches
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0x90: {"BCC", MODE_RELATIVE}, // BCC
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0xB0: {"BCS", MODE_RELATIVE}, // BCS
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0xF0: {"BEQ", MODE_RELATIVE}, // BEQ
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0x30: {"BMI", MODE_RELATIVE}, // BMI
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0xD0: {"BNE", MODE_RELATIVE}, // BNE
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0x10: {"BPL", MODE_RELATIVE}, // BPL
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0x50: {"BVC", MODE_RELATIVE}, // BVC
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0x70: {"BVS", MODE_RELATIVE}, // BVS
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// 2-opcode, 2-cycle immediate mode
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0x09: {"ORA", MODE_IMMEDIATE},
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0x29: {"AND", MODE_IMMEDIATE},
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0x49: {"EOR", MODE_IMMEDIATE},
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0x69: {"ADC", MODE_IMMEDIATE},
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0xC0: {"CPY", MODE_IMMEDIATE},
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0xC9: {"CMP", MODE_IMMEDIATE},
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0xA0: {"LDY", MODE_IMMEDIATE},
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0xA2: {"LDX", MODE_IMMEDIATE},
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0xA9: {"LDA", MODE_IMMEDIATE},
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0xE0: {"CPX", MODE_IMMEDIATE},
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0xE9: {"SBC", MODE_IMMEDIATE},
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// 3-opcode, 4-cycle absolute mode
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0x8D: {"STA", MODE_ABSOLUTE},
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0x8E: {"STX", MODE_ABSOLUTE},
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0x8C: {"STY", MODE_ABSOLUTE},
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0x6D: {"ADC", MODE_ABSOLUTE},
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0x2D: {"AND", MODE_ABSOLUTE},
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0x2C: {"BIT", MODE_ABSOLUTE},
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0xCD: {"CMP", MODE_ABSOLUTE},
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0xEC: {"CPX", MODE_ABSOLUTE},
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0xCC: {"CPY", MODE_ABSOLUTE},
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0x4D: {"EOR", MODE_ABSOLUTE},
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0xAD: {"LDA", MODE_ABSOLUTE},
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0xAE: {"LDX", MODE_ABSOLUTE},
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0xAC: {"LDY", MODE_ABSOLUTE},
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0x0D: {"ORA", MODE_ABSOLUTE},
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0xED: {"SBC", MODE_ABSOLUTE},
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// 2-opcode, 3-cycle zero page
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0x05: {"ORA", MODE_ZP},
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0x24: {"BIT", MODE_ZP},
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0x25: {"AND", MODE_ZP},
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0x45: {"EOR", MODE_ZP},
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0x65: {"ADC", MODE_ZP},
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0x84: {"STY", MODE_ZP},
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0x85: {"STA", MODE_ZP},
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0x86: {"STX", MODE_ZP},
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0xA4: {"LDY", MODE_ZP},
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0xA5: {"LDA", MODE_ZP},
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0xA6: {"LDX", MODE_ZP},
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0xC4: {"CPY", MODE_ZP},
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0xC5: {"CMP", MODE_ZP},
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0xE4: {"CPX", MODE_ZP},
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0xE5: {"SBC", MODE_ZP},
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// 3-opcode, 4*-cycle abs,X/Y
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0x1D: {"ORA", MODE_ABS_X},
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0x19: {"ORA", MODE_ABS_X},
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0x39: {"AND", MODE_ABS_X},
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0x3D: {"AND", MODE_ABS_X},
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0x59: {"EOR", MODE_ABS_X},
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0x5D: {"EOR", MODE_ABS_X},
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0x79: {"ADC", MODE_ABS_X},
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0x7D: {"ADC", MODE_ABS_X},
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0xBD: {"LDA", MODE_ABS_X},
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0xB9: {"LDA", MODE_ABS_X},
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0xD9: {"CMP", MODE_ABS_X},
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0xDD: {"CMP", MODE_ABS_X},
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0xF9: {"SBC", MODE_ABS_X},
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0xFD: {"SBC", MODE_ABS_X},
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0xBE: {"LDX", MODE_ABS_X},
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0xBC: {"LDY", MODE_ABS_X},
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// 3-opcode, 5-cycle abs,X/Y
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0x99: {"STA", MODE_ABS_Y},
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0x9D: {"STA", MODE_ABS_X},
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// 2-opcode, 4-cycle zp,X/Y
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0x15: {"ORA", MODE_ZP_X},
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0x35: {"AND", MODE_ZP_X},
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0x55: {"EOR", MODE_ZP_X},
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0x75: {"ADC", MODE_ZP_X},
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0x95: {"STA", MODE_ZP_X},
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0xB5: {"LDA", MODE_ZP_X},
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0xD5: {"CMP", MODE_ZP_X},
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0xF5: {"SBC", MODE_ZP_X},
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0x96: {"STX", MODE_ZP_Y},
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0xB6: {"LDX", MODE_ZP_Y},
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0x94: {"STY", MODE_ZP_X},
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0xB4: {"LDY", MODE_ZP_X},
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// 2-opcode, 5*-cycle zero-page indirect Y
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0x11: {"ORA", MODE_INDIRECT_Y},
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0x31: {"AND", MODE_INDIRECT_Y},
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0x51: {"EOR", MODE_INDIRECT_Y},
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0x71: {"ADC", MODE_INDIRECT_Y},
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0x91: {"STA", MODE_INDIRECT_Y},
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0xB1: {"LDA", MODE_INDIRECT_Y},
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0xD1: {"CMP", MODE_INDIRECT_Y},
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0xF1: {"SBC", MODE_INDIRECT_Y},
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// 2-opcode, 6-cycle zero-page X indirect
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0x01: {"ORA", MODE_INDIRECT_X},
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0x21: {"AND", MODE_INDIRECT_X},
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0x41: {"EOR", MODE_INDIRECT_X},
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0x61: {"ADC", MODE_INDIRECT_X},
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0x81: {"STA", MODE_INDIRECT_X},
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0xA1: {"LDA", MODE_INDIRECT_X},
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0xC1: {"CMP", MODE_INDIRECT_X},
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0xE1: {"SBC", MODE_INDIRECT_X},
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// 1-opcode, 2-cycle, accumulator rmw
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0x0A: {"ASL", MODE_A},
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0x2A: {"ROL", MODE_A},
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0x4A: {"LSR", MODE_A},
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0x6A: {"ROR", MODE_A},
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// 2-opcode, 5-cycle, zp rmw
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0x06: {"ASL", MODE_ZP},
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0x26: {"ROL", MODE_ZP},
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0x46: {"LSR", MODE_ZP},
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0x66: {"ROR", MODE_ZP},
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0xC6: {"DEC", MODE_ZP},
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0xE6: {"INC", MODE_ZP},
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// 3-opcode, 6-cycle, abs rmw
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0x0E: {"ASL", MODE_ABSOLUTE},
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0x2E: {"ROL", MODE_ABSOLUTE},
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0x4E: {"LSR", MODE_ABSOLUTE},
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0x6E: {"ROR", MODE_ABSOLUTE},
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0xCE: {"DEC", MODE_ABSOLUTE},
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0xEE: {"INC", MODE_ABSOLUTE},
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// 2-opcode, 6-cycle, zp,X rmw
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0x16: {"ASL", MODE_ZP_X},
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0x36: {"ROL", MODE_ZP_X},
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0x56: {"LSR", MODE_ZP_X},
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0x76: {"ROR", MODE_ZP_X},
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0xD6: {"DEC", MODE_ZP_X},
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0xF6: {"INC", MODE_ZP_X},
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// 3-opcode, 7-cycle, abs,X rmw
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0x1E: {"ASL", MODE_ABS_X},
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0x3E: {"ROL", MODE_ABS_X},
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0x5E: {"LSR", MODE_ABS_X},
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0x7E: {"ROR", MODE_ABS_X},
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0xDE: {"DEC", MODE_ABS_X},
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0xFE: {"INC", MODE_ABS_X},
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}
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257
opcodes/opcodes.go
Normal file
257
opcodes/opcodes.go
Normal file
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@ -0,0 +1,257 @@
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/*
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Package opcodes stores metadata/information about 6502 opcodes. It's
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used for disassembly, and (in the future) for building the opcode
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function tables.
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*/
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package opcodes
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// Opcode addressing modes.
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const (
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MODE_IMPLIED = iota
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MODE_ABSOLUTE
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MODE_INDIRECT
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MODE_RELATIVE
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MODE_IMMEDIATE
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MODE_ABS_X
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MODE_ABS_Y
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MODE_ZP
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MODE_ZP_X
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MODE_ZP_Y
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MODE_INDIRECT_Y
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MODE_INDIRECT_X
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MODE_A
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)
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// Opcode read/write semantics
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const (
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MEM_NONE = 0
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MEM_R = 1
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MEM_W = 2
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MEM_RMW = 3
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)
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// Lengths of instructions for each addressing mode.
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var ModeLengths = map[int]int{
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MODE_IMPLIED: 1,
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MODE_ABSOLUTE: 3,
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MODE_INDIRECT: 3,
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MODE_RELATIVE: 2,
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MODE_IMMEDIATE: 2,
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MODE_ABS_X: 3,
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MODE_ABS_Y: 3,
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MODE_ZP: 2,
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MODE_ZP_X: 2,
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MODE_ZP_Y: 2,
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MODE_INDIRECT_Y: 2,
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MODE_INDIRECT_X: 2,
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MODE_A: 1,
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}
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const (
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RW_X = 0 // Don't care
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RW_R = 1
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RW_W = 2
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RW_RMW = 3
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)
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// Opcode stores information about instructions.
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type Opcode struct {
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Name string
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Mode int
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RW int
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}
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// Fake NoOp instruction used when disassembling.
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var NoOp = Opcode{"???", MODE_IMPLIED, RW_X}
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// The list of Opcodes.
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var Opcodes = map[byte]Opcode{
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// BUG(zellyn): Add 65C02 instructions.
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// Flag set and clear
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0x18: {"CLC", MODE_IMPLIED, RW_X}, // CLC
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0xD8: {"CLD", MODE_IMPLIED, RW_X}, // CLD
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0x58: {"CLI", MODE_IMPLIED, RW_X}, // CLI
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0xB8: {"CLV", MODE_IMPLIED, RW_X}, // CLV
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0x38: {"SEC", MODE_IMPLIED, RW_X}, // SEC
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0xF8: {"SED", MODE_IMPLIED, RW_X}, // SED
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0x78: {"SEI", MODE_IMPLIED, RW_X}, // SEI
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// Very simple 1-opcode instructions
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0xEA: {"NOP", MODE_IMPLIED, RW_X},
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0xAA: {"TAX", MODE_IMPLIED, RW_X},
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0xA8: {"TAY", MODE_IMPLIED, RW_X},
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0xBA: {"TSX", MODE_IMPLIED, RW_X},
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0x8A: {"TXA", MODE_IMPLIED, RW_X},
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0x9A: {"TXS", MODE_IMPLIED, RW_X},
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0x98: {"TYA", MODE_IMPLIED, RW_X},
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// Slightly more complex 1-opcode instructions
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0xCA: {"DEX", MODE_IMPLIED, RW_X},
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0x88: {"DEY", MODE_IMPLIED, RW_X},
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0xE8: {"INX", MODE_IMPLIED, RW_X},
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0xC8: {"INY", MODE_IMPLIED, RW_X},
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0x48: {"PHA", MODE_IMPLIED, RW_X},
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0x08: {"PHP", MODE_IMPLIED, RW_X},
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0x68: {"PLA", MODE_IMPLIED, RW_X},
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0x28: {"PLP", MODE_IMPLIED, RW_X},
|
||||
|
||||
// Jumps, returns, etc.
|
||||
0x4C: {"JMP", MODE_ABSOLUTE, RW_X},
|
||||
0x6C: {"JMP", MODE_INDIRECT, RW_X},
|
||||
0x20: {"JSR", MODE_ABSOLUTE, RW_X},
|
||||
0x60: {"RTS", MODE_IMPLIED, RW_X},
|
||||
0x40: {"RTI", MODE_IMPLIED, RW_X},
|
||||
0x00: {"BRK", MODE_IMPLIED, RW_X},
|
||||
|
||||
// Branches
|
||||
0x90: {"BCC", MODE_RELATIVE, RW_X}, // BCC
|
||||
0xB0: {"BCS", MODE_RELATIVE, RW_X}, // BCS
|
||||
0xF0: {"BEQ", MODE_RELATIVE, RW_X}, // BEQ
|
||||
0x30: {"BMI", MODE_RELATIVE, RW_X}, // BMI
|
||||
0xD0: {"BNE", MODE_RELATIVE, RW_X}, // BNE
|
||||
0x10: {"BPL", MODE_RELATIVE, RW_X}, // BPL
|
||||
0x50: {"BVC", MODE_RELATIVE, RW_X}, // BVC
|
||||
0x70: {"BVS", MODE_RELATIVE, RW_X}, // BVS
|
||||
|
||||
// 2-opcode, 2-cycle immediate mode
|
||||
0x09: {"ORA", MODE_IMMEDIATE, RW_R},
|
||||
0x29: {"AND", MODE_IMMEDIATE, RW_R},
|
||||
0x49: {"EOR", MODE_IMMEDIATE, RW_R},
|
||||
0x69: {"ADC", MODE_IMMEDIATE, RW_R},
|
||||
0xC0: {"CPY", MODE_IMMEDIATE, RW_R},
|
||||
0xC9: {"CMP", MODE_IMMEDIATE, RW_R},
|
||||
0xA0: {"LDY", MODE_IMMEDIATE, RW_R},
|
||||
0xA2: {"LDX", MODE_IMMEDIATE, RW_R},
|
||||
0xA9: {"LDA", MODE_IMMEDIATE, RW_R},
|
||||
0xE0: {"CPX", MODE_IMMEDIATE, RW_R},
|
||||
0xE9: {"SBC", MODE_IMMEDIATE, RW_R},
|
||||
|
||||
// 3-opcode, 4-cycle absolute mode
|
||||
0x8D: {"STA", MODE_ABSOLUTE, RW_W},
|
||||
0x8E: {"STX", MODE_ABSOLUTE, RW_W},
|
||||
0x8C: {"STY", MODE_ABSOLUTE, RW_W},
|
||||
0x6D: {"ADC", MODE_ABSOLUTE, RW_R},
|
||||
0x2D: {"AND", MODE_ABSOLUTE, RW_R},
|
||||
0x2C: {"BIT", MODE_ABSOLUTE, RW_R},
|
||||
0xCD: {"CMP", MODE_ABSOLUTE, RW_R},
|
||||
0xEC: {"CPX", MODE_ABSOLUTE, RW_R},
|
||||
0xCC: {"CPY", MODE_ABSOLUTE, RW_R},
|
||||
0x4D: {"EOR", MODE_ABSOLUTE, RW_R},
|
||||
0xAD: {"LDA", MODE_ABSOLUTE, RW_R},
|
||||
0xAE: {"LDX", MODE_ABSOLUTE, RW_R},
|
||||
0xAC: {"LDY", MODE_ABSOLUTE, RW_R},
|
||||
0x0D: {"ORA", MODE_ABSOLUTE, RW_R},
|
||||
0xED: {"SBC", MODE_ABSOLUTE, RW_R},
|
||||
|
||||
// 2-opcode, 3-cycle zero page
|
||||
0x05: {"ORA", MODE_ZP, RW_R},
|
||||
0x24: {"BIT", MODE_ZP, RW_R},
|
||||
0x25: {"AND", MODE_ZP, RW_R},
|
||||
0x45: {"EOR", MODE_ZP, RW_R},
|
||||
0x65: {"ADC", MODE_ZP, RW_R},
|
||||
0x84: {"STY", MODE_ZP, RW_W},
|
||||
0x85: {"STA", MODE_ZP, RW_W},
|
||||
0x86: {"STX", MODE_ZP, RW_W},
|
||||
0xA4: {"LDY", MODE_ZP, RW_R},
|
||||
0xA5: {"LDA", MODE_ZP, RW_R},
|
||||
0xA6: {"LDX", MODE_ZP, RW_R},
|
||||
0xC4: {"CPY", MODE_ZP, RW_R},
|
||||
0xC5: {"CMP", MODE_ZP, RW_R},
|
||||
0xE4: {"CPX", MODE_ZP, RW_R},
|
||||
0xE5: {"SBC", MODE_ZP, RW_R},
|
||||
|
||||
// 3-opcode, 4*-cycle abs,X/Y
|
||||
0x1D: {"ORA", MODE_ABS_X, RW_R},
|
||||
0x19: {"ORA", MODE_ABS_X, RW_R},
|
||||
0x39: {"AND", MODE_ABS_X, RW_R},
|
||||
0x3D: {"AND", MODE_ABS_X, RW_R},
|
||||
0x59: {"EOR", MODE_ABS_X, RW_R},
|
||||
0x5D: {"EOR", MODE_ABS_X, RW_R},
|
||||
0x79: {"ADC", MODE_ABS_X, RW_R},
|
||||
0x7D: {"ADC", MODE_ABS_X, RW_R},
|
||||
0xBD: {"LDA", MODE_ABS_X, RW_R},
|
||||
0xB9: {"LDA", MODE_ABS_X, RW_R},
|
||||
0xD9: {"CMP", MODE_ABS_X, RW_R},
|
||||
0xDD: {"CMP", MODE_ABS_X, RW_R},
|
||||
0xF9: {"SBC", MODE_ABS_X, RW_R},
|
||||
0xFD: {"SBC", MODE_ABS_X, RW_R},
|
||||
0xBE: {"LDX", MODE_ABS_X, RW_R},
|
||||
0xBC: {"LDY", MODE_ABS_X, RW_R},
|
||||
|
||||
// 3-opcode, 5-cycle abs,X/Y
|
||||
0x99: {"STA", MODE_ABS_Y, RW_W},
|
||||
0x9D: {"STA", MODE_ABS_X, RW_W},
|
||||
|
||||
// 2-opcode, 4-cycle zp,X/Y
|
||||
0x15: {"ORA", MODE_ZP_X, RW_R},
|
||||
0x35: {"AND", MODE_ZP_X, RW_R},
|
||||
0x55: {"EOR", MODE_ZP_X, RW_R},
|
||||
0x75: {"ADC", MODE_ZP_X, RW_R},
|
||||
0x95: {"STA", MODE_ZP_X, RW_W},
|
||||
0xB5: {"LDA", MODE_ZP_X, RW_R},
|
||||
0xD5: {"CMP", MODE_ZP_X, RW_R},
|
||||
0xF5: {"SBC", MODE_ZP_X, RW_R},
|
||||
0x96: {"STX", MODE_ZP_Y, RW_W},
|
||||
0xB6: {"LDX", MODE_ZP_Y, RW_R},
|
||||
0x94: {"STY", MODE_ZP_X, RW_W},
|
||||
0xB4: {"LDY", MODE_ZP_X, RW_R},
|
||||
|
||||
// 2-opcode, 5*-cycle zero-page indirect Y
|
||||
0x11: {"ORA", MODE_INDIRECT_Y, RW_R},
|
||||
0x31: {"AND", MODE_INDIRECT_Y, RW_R},
|
||||
0x51: {"EOR", MODE_INDIRECT_Y, RW_R},
|
||||
0x71: {"ADC", MODE_INDIRECT_Y, RW_R},
|
||||
0x91: {"STA", MODE_INDIRECT_Y, RW_W},
|
||||
0xB1: {"LDA", MODE_INDIRECT_Y, RW_R},
|
||||
0xD1: {"CMP", MODE_INDIRECT_Y, RW_R},
|
||||
0xF1: {"SBC", MODE_INDIRECT_Y, RW_R},
|
||||
|
||||
// 2-opcode, 6-cycle zero-page X indirect
|
||||
0x01: {"ORA", MODE_INDIRECT_X, RW_R},
|
||||
0x21: {"AND", MODE_INDIRECT_X, RW_R},
|
||||
0x41: {"EOR", MODE_INDIRECT_X, RW_R},
|
||||
0x61: {"ADC", MODE_INDIRECT_X, RW_R},
|
||||
0x81: {"STA", MODE_INDIRECT_X, RW_W},
|
||||
0xA1: {"LDA", MODE_INDIRECT_X, RW_R},
|
||||
0xC1: {"CMP", MODE_INDIRECT_X, RW_R},
|
||||
0xE1: {"SBC", MODE_INDIRECT_X, RW_R},
|
||||
|
||||
// 1-opcode, 2-cycle, accumulator rmw
|
||||
0x0A: {"ASL", MODE_A, RW_RMW},
|
||||
0x2A: {"ROL", MODE_A, RW_RMW},
|
||||
0x4A: {"LSR", MODE_A, RW_RMW},
|
||||
0x6A: {"ROR", MODE_A, RW_RMW},
|
||||
|
||||
// 2-opcode, 5-cycle, zp rmw
|
||||
0x06: {"ASL", MODE_ZP, RW_RMW},
|
||||
0x26: {"ROL", MODE_ZP, RW_RMW},
|
||||
0x46: {"LSR", MODE_ZP, RW_RMW},
|
||||
0x66: {"ROR", MODE_ZP, RW_RMW},
|
||||
0xC6: {"DEC", MODE_ZP, RW_RMW},
|
||||
0xE6: {"INC", MODE_ZP, RW_RMW},
|
||||
|
||||
// 3-opcode, 6-cycle, abs rmw
|
||||
0x0E: {"ASL", MODE_ABSOLUTE, RW_RMW},
|
||||
0x2E: {"ROL", MODE_ABSOLUTE, RW_RMW},
|
||||
0x4E: {"LSR", MODE_ABSOLUTE, RW_RMW},
|
||||
0x6E: {"ROR", MODE_ABSOLUTE, RW_RMW},
|
||||
0xCE: {"DEC", MODE_ABSOLUTE, RW_RMW},
|
||||
0xEE: {"INC", MODE_ABSOLUTE, RW_RMW},
|
||||
|
||||
// 2-opcode, 6-cycle, zp,X rmw
|
||||
0x16: {"ASL", MODE_ZP_X, RW_RMW},
|
||||
0x36: {"ROL", MODE_ZP_X, RW_RMW},
|
||||
0x56: {"LSR", MODE_ZP_X, RW_RMW},
|
||||
0x76: {"ROR", MODE_ZP_X, RW_RMW},
|
||||
0xD6: {"DEC", MODE_ZP_X, RW_RMW},
|
||||
0xF6: {"INC", MODE_ZP_X, RW_RMW},
|
||||
|
||||
// 3-opcode, 7-cycle, abs,X rmw
|
||||
0x1E: {"ASL", MODE_ABS_X, RW_RMW},
|
||||
0x3E: {"ROL", MODE_ABS_X, RW_RMW},
|
||||
0x5E: {"LSR", MODE_ABS_X, RW_RMW},
|
||||
0x7E: {"ROR", MODE_ABS_X, RW_RMW},
|
||||
0xDE: {"DEC", MODE_ABS_X, RW_RMW},
|
||||
0xFE: {"INC", MODE_ABS_X, RW_RMW},
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user