I51_acall:	"Absolute Call"
I51_add:	"Add Second Operand to Acc"
I51_addc:	"Add Second Operand to Acc with carry"
I51_ajmp:	"Absolute Jump"
I51_anl:	"Logical AND (op1 &= op2)"
I51_cjne:	"Compare Operands and JNE"
I51_clr:	"Clear Operand (0)"
I51_cpl:	"Complement Operand"
I51_da:		"Decimal Adjust Accumulator"
I51_dec:	"Decrement Operand"
I51_div:	"Divide Acc by B"
I51_djnz:	"Decrement Operand and JNZ"
I51_inc:	"Increment Operand"
I51_jb:		"Jump if Bit is set"
I51_jbc:	"Jump if Bit is set & clear Bit"
I51_jc:		"Jump if Carry is set"
I51_jmp:	"Jump indirect relative to Data Pointer"
I51_jnb:	"Jump if Bit is clear"
I51_jnc:	"Jump if Carry is clear"
I51_jnz:	"Jump if Acc is not zero"
I51_jz:		"Jump if Acc is zero"
I51_lcall:	"Long Subroutine Call"
I51_ljmp:	"Long Jump"
I51_mov:	"Move (Op1 <- Op2)"
I51_movc:	"Move code byte relative to second op to Acc"
I51_movx:	"Move from/to external RAM"
I51_mul:	"Multiply Acc by B"
I51_nop:	"No operation"
I51_orl:	"Logical OR (op1 |= op2)"
I51_pop:	"Pop  from Stack and put in Direct RAM"
I51_push:	"Push from Direct RAM to Stack"
I51_ret:	"Return from subroutine"
I51_reti:	"Return from Interrupt"
I51_rl:		"Rotate Acc left"
I51_rlc:	"Rotate Acc left through Carry"
I51_rr:		"Rotate Acc right"
I51_rrc:	"Rotate Acc right through Carry"
I51_setb:	"Set Direct Bit"
I51_sjmp:	"Short jump"
I51_subb:	"Subtract Second Operand from Acc with Borrow"
I51_swap:	"Swap nibbles of Acc"
I51_xch:	"Exchange Operands"
I51_xchd:	"Exchange Digit in Acc with Indirect RAM"
I51_xrl:	"Exclusive OR (op1 ^= op2)"

// 80251 instructions

I51_jsle:       "Jump if less than or equal (signed)"
I51_jsg:        "Jump if greater than (signed)"
I51_jle:        "Jump if less than or equal"
I51_jg:         "Jump if greater than"
I51_jsl:        "Jump if less than (signed)"
I51_jsge:       "Jump if greater than or equal (signed)"
I51_je:         "Jump if equal"
I51_jne:        "Jump if not equal"
I51_trap:       "Trap"
I51_ejmp:       "Extended jump"
I51_ecall:      "Extended call"
I51_eret:       "Extended return"
I51_movh:       "Move immediate 16-bit data to the high word of a dword (double-word) register"
I51_movz:       "Move 8-bit register to 16-bit register with zero extension"
I51_movs:       "Move 8-bit register to 16-bit register with sign extension"
I51_srl:        "Shift logical right by 1 bit"
I51_sra:        "Shift arithmetic right by 1 bit"
I51_sll:        "Shift logical left by 1 bit"
I51_sub:        "Subtract"
I51_cmp:        "Compare"