mirror of
https://github.com/SourMesen/Mesen2.git
synced 2025-04-02 10:21:44 -04:00
251 lines
No EOL
8.3 KiB
JSON
251 lines
No EOL
8.3 KiB
JSON
{
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"instructions": [
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{
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"op": "nop",
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"name": "NOP - No operation",
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"description": ""
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},
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{
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"op": "stop",
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"name": "STOP - Stop",
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"description": "Suspends the CPU and LCD until a button is pressed."
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},
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{
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"op": "ld",
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"name": "LD - Load",
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"description": "LD destination, source\nLoads the destination with the value specified by the source."
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},
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{
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"op": "inc",
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"name": "INC - Increment",
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"description": "Increments the specified value",
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"flags": ["Zero", "Negative", "HalfCarry"]
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},
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{
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"op": "dec",
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"name": "DEC - Decrement",
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"description": "Decrements the specified value",
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"flags": ["Zero", "Negative", "HalfCarry"]
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},
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{
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"op": "rlca",
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"name": "RLCA - Rotate Left Circular Accumulator",
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"description": "Rotates the accumulator's bits to the left. MSB is moved to the LSB, and also set as the carry flag.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "rla",
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"name": "RLA - Rotate Left Accumulator",
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"description": "Rotates the accumulator's bits to the left. MSB is moved to the carry flag, and the LSB is set to the value of the carry flag.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "rrca",
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"name": "RRCA - Rotate Right Circular Accumulator",
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"description": "Rotates the accumulator's bits to the right. LSB is moved to the MSB, and also set as the carry flag.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "rra",
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"name": "RRA - Rotate Right Accumulator",
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"description": "Rotates the accumulator's bits to the right. LSB is moved to the carry flag, and the MSB is set to the value of the carry flag.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "add",
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"name": "ADD - Add",
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"description": "Adds the value of both operands together and stores the result in the first operand.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "adc",
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"name": "ADC - Add With Carry",
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"description": "Adds the accumulator, carry flag and the second operand together. Stores the result in the accumulator.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "jr",
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"name": "JR - Jump Relative",
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"description": "Jumps to the relative address specified. When a condition is specified, only jumps if the condition is true."
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},
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{
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"op": "daa",
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"name": "DAA - Decimal Adjust Accumulator",
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"description": "Adjusts the value of the accumulator for BCD addition and subtraction operations.",
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"flags": ["Zero", "HalfCarry", "Carry"]
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},
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{
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"op": "scf",
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"name": "SCF - Set Carry Flag",
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"description": "Sets the carry flag, clears negative and half-carry flags.",
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"flags": ["Carry", "Negative", "HalfCarry"]
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},
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{
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"op": "ccf",
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"name": "CCF - Complement Carry Flag",
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"description": "Inverts the value of the carry flag. Clears negative and half-carry flags.",
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"flags": ["Carry", "Negative", "HalfCarry"]
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},
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{
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"op": "cpl",
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"name": "CPL - Complement (Accumulator)",
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"description": "Inverts all bits in the accumulator.",
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"flags": ["Negative", "HalfCarry"]
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},
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{
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"op": "halt",
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"name": "HALT - Halt",
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"description": "Halts the CPU until the next interrupt or until reset."
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},
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{
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"op": "sub",
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"name": "SUB - Subtract",
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"description": "Subtract the value of the second operand from the accumulator and stores the result in the accumulator.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "sbc",
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"name": "SBC - Subtract With Carry",
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"description": "Subtract the value of the second operand and the carry flag from the accumulator and stores the result in the accumulator.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "and",
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"name": "AND - Bitwise AND",
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"description": "Performs a bitwise AND operation between the operand and the value of the accumulator and stores the result in the accumulator.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "or",
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"name": "OR - Bitwise OR",
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"description": "Performs a bitwise OR operation between the operand and the value of the accumulator and stores the result in the accumulator.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "xor",
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"name": "XOR - Bitwise XOR",
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"description": "Performs a bitwise XOR operation between the operand and the value of the accumulator and stores the result in the accumulator.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "cp",
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"name": "CP - Compare",
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"description": "The content of the operand is compared with the accumulator (A - operand) and flags are updated.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "ret",
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"name": "RET - Return",
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"description": "Returns from a routine called by CALL. When a condition is specified, only returns if the condition is true."
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},
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{
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"op": "pop",
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"name": "POP - Pop",
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"description": "Pops 2 bytes from the stack, stores them in the operand."
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},
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{
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"op": "jp",
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"name": "JP - Jump",
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"description": "Jumps to the specified address. When a condition is specified, only jumps if the condition is true."
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},
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{
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"op": "call",
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"name": "CALL - Call",
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"description": "Calls a routine. When a condition is specified, only jumps to the routine if the condition is true."
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},
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{
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"op": "push",
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"name": "PUSH - Push",
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"description": "Pushes the value of the operand (2 bytes) to the stack."
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},
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{
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"op": "rst",
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"name": "RST - Restart",
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"description": "Calls the routine defined at the predefined address (operand)."
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},
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{
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"op": "reti",
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"name": "RETI - Return from Interrupt",
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"description": "Returns from an interrupt handler."
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},
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{
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"op": "ei",
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"name": "EI - Enable Interrupts",
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"description": "Enables interrupts."
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},
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{
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"op": "di",
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"name": "DI - Disable Interrupts",
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"description": "Disables interrupts."
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},
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{
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"op": "ldh",
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"name": "LDH - Load High",
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"description": "Reads (or writes) value from \"high RAM\" at $FFxx, based on the operands."
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},
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{
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"op": "rlc",
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"name": "RLC - Rotate Left Carry",
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"description": "Rotates the operand's bits to the left. MSB is moved to the LSB, and also set as the carry flag.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "rrc",
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"name": "RRC - Rotate Right Carry",
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"description": "Rotates the operand's bits to the right. LSB is moved to the MSB, and also set as the carry flag.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "rl",
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"name": "RL - Rotate Left",
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"description": "Rotates the operand's bits to the left. MSB is moved to the carry flag, and the LSB is set to the value of the carry flag.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "rr",
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"name": "RR - Rotate Right",
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"description": "Rotates the operand's bits to the right. LSB is moved to the carry flag, and the MSB is set to the value of the carry flag.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "sla",
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"name": "SLA - Shift Left Arithmetic",
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"description": "Shifts content of operand to the left. MSB is moved to the carry flag, LSB is set to 0.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "sra",
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"name": "SRA - Shift Right Arithmetic",
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"description": "Shifts content of operand to the right. LSB is moved to the carry flag, MSB does not change.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "srl",
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"name": "SRL - Shift Right Logical",
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"description": "Shifts content of operand to the right. LSB is moved to the carry flag, MSB is set to 0.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "swap",
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"name": "SWAP - Swap",
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"description": "Swaps the upper and lower nibbles of the operand.",
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"flags": ["Zero", "Negative", "HalfCarry", "Carry"]
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},
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{
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"op": "bit",
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"name": "BIT - Test Bit",
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"description": "Tests the specified bit of the specified value. Sets zero flag if bit is clear, clears it if set.",
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"flags": ["Zero", "Negative", "HalfCarry"]
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},
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{
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"op": "res",
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"name": "RES - Reset Bit",
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"description": "Clears the specified bit of the operand value."
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},
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{
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"op": "set",
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"name": "SET - Set Bit",
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"description": "Sets the specified bit of the operand value."
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}
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]
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} |