Instruction format (1 to 2 Bytes)
G G G G G M M X X X X X A A A A
X R R R X r r r
MM
MM = (00)
Register Mode
MM = (01)
Address Mode
MM = (10)
Immediate Mode
MM = (11)
Page Mode (FUTURE)
GGGG = (00000)
LDR Regxx,Regyy (sets Zero Flag)
LDA Regxx, Memory
LDI Regxx, #Value
GGGG = (00001)
STA RegXX,Memory
GGGG = (00010)
INCR RegXX
INCA Memory
GGGG = (00011)
ADDR RegXX,RegYY
ADDA RegXX,Memory
ADDI RegXX,Value
GGGG = (00100)
SUBR RegXX,RegYY
SUBA RegXX,Memory
SUBI RegXX,Value
GGGG = (00101)
DECR RegXX
DECA Memory
GGGG = (00110)
MULTR RegXX, RegYY
MULTA RegXX,Memory
MULTI RegXX, Value
GGGG = (00111)
CMPR REGxx,RegYY (Carry, Zero)
CMPI REGxx,Value (Carry, Zero)
CMPA REGxx,Address (Carry, Zero)
GGGG = (01000)
BRZ Address
BRC Address
GGGG = (01001)
HALT
GGGG = (01010)
OUT RegXX
GGGG = (01011)
ANDR RegXX,RegYY
ANDI RegXX,Value
ANDA RegXX,Memory
GGGG = (01100)
ORR RegXX,RegYY
ORI RegXX,Value
ORA RegXX,Memory
GGGG = (01101)
NOTR RegXX
GGGG = (01110)
XORR RegXX,RegYY
XORI RegXX,Value
XORA RegXX,Memory
GGGG = (11111)
NOP
16 groups (5 bits) - 3 sub modes - (2 bits)
// Future Instructions
PUSH Reg
PUSHF
POPF
POP Reg
CALL Address
CALL Z
CALL NZ
CALL C
RET
RETZ
RETC
RETNZ
