3.7 KiB
NOP
NOP - No operation (does nothing, advances to the next instruction)
BRK
BRK - Pause CPU (halts execution until resumed)
HLT
HLT - Halt CPU execution
MOV_RN_IMM
MOV R1, 0x10 - Move immediate value 0x10 to register R1
MOV_RN_RM
MOV R2, R1 - Move value from R1 to R2
MOV_RN_ADDR
MOV R3, [0x2000] - Load value from memory address 0x2000 into R3
MOV_ADDR_RN
MOV [0x2000], R1 - Store R1 value to memory address 0x2000
SWAP
SWAP R1, R2 - Swap values between R1 and R2
SWAPN
SWAPN R1 - Swap nibbles within R1
ADD_RN_RM
ADD R1, R2 - Add R2 to R1 (R1 = R1 + R2)
ADD_RN_IMM
ADD R1, 0x10 - Add immediate 0x10 to R1 (R1 = R1 + 0x10)
SUB_RN_RM
SUB R1, R2 - Subtract R2 from R1 (R1 = R1 - R2)
SUB_RN_IMM
SUB R1, 0x10 - Subtract immediate 0x10 from R1 (R1 = R1 - 0x10)
MUL_RN_RM
MUL R1, R2 - Multiply R1 by R2 (R1 = R1 * R2)
MUL_RN_IMM
MUL R1, 0x10 - Multiply R1 by immediate 0x10 (R1 = R1 * 0x10)
DIV_RN_RM
DIV R1, R2 - Divide R1 by R2 (R1 = R1 / R2)
DIV_RN_IMM
DIV R1, 0x10 - Divide R1 by immediate 0x10 (R1 = R1 / 0x10)
MOD_RN_RM
MOD R1, R2 - Compute remainder of R1 / R2 (R1 = R1 % R2)
MOD_RN_IMM
MOD R1, 0x10 - Compute remainder of R1 / 0x10 (R1 = R1 % 0x10)
NEG_RN
NEG R1 - Negate R1 (R1 = -R1)
AND_RN_RM
AND R1, R2 - Bitwise AND of R1 and R2 (R1 = R1 & R2)
AND_RN_IMM
AND R1, 0x10 - Bitwise AND R1 with immediate 0x10 (R1 = R1 & 0x10)
OR_RN_RM
OR R1, R2 - Bitwise OR of R1 and R2 (R1 = R1 | R2)
OR_RN_IMM
OR R1, 0x10 - Bitwise OR R1 with immediate 0x10 (R1 = R1 | 0x10)
XOR_RN_RM
XOR R1, R2 - Bitwise XOR of R1 and R2 (R1 = R1 ^ R2)
XOR_RN_IMM
XOR R1, 0x10 - Bitwise XOR R1 with immediate 0x10 (R1 = R1 ^ 0x10)
NOT_RN
NOT R1 - Bitwise NOT of R1 (R1 = ~R1)
SHL_RN_IMM
SHL R1, 2 - Logical shift left R1 by 2 bits
SHR_RN_IMM
SHR R1, 2 - Logical shift right R1 by 2 bits
SAR_RN_IMM
SAR R1, 2 - Arithmetic shift right R1 by 2 bits (sign extended)
JMP
JMP 0x3000 - Jump to address 0x3000
JMP_REL
JMP +5 - Jump 5 bytes forward
INC_RN
INC R1 - Increment R1
INC_ADDR
INC [0x2000] - Increment value at memory address 0x2000
DEC_RN
DEC R1 - Decrement R1
DEC_ADDR
DEC [0x2000] - Decrement value at memory address 0x2000
CMP
CMP R1, R2 - Compare R1 and R2 (sets flags based on R1 - R2)
JE
JE 0x4000 - Jump to 0x4000 if equal (zero flag set)
JNE
JNE 0x4000 - Jump to 0x4000 if not equal (zero flag not set)
JG
JG 0x4000 - Jump to 0x4000 if greater
JL
JL 0x4000 - Jump to 0x4000 if less
JGE
JGE 0x4000 - Jump to 0x4000 if greater or equal
JLE
JLE 0x4000 - Jump to 0x4000 if less or equal
CALL
CALL 0x5000 - Call subroutine at 0x5000
RET
RET - Return from subroutine
JMP_BIT_CLEAR_RN
JMPBC R1, 3, 0x4000 - Jump to address 0x4000 if bit 3 in register R1 is not set.
JMP_BIT_CLEAR_ADDR
JMPBC 0x2000, 5, 0x5000 - Jump to address 0x5000 if bit 5 in memory at address 0x2000 is not set.
JMP_BIT_SET_RN
JMPBS R2, 1, 0x6000 - Jump to address 0x6000 if bit 1 in register R2 is set.
JMP_BIT_SET_ADDR
JMPBS 0x3000, 7, 0x7000 - Jump to address 0x7000 if bit 7 in memory at address 0x3000 is set.