LS8-cheatsheet.md

LS-8 Cheatsheet

This document is non-authoritative. In cases where it differs from the spec, the spec is correct.

ALU ops

ADD  10100000 00000aaa 00000bbb
SUB  10100001 00000aaa 00000bbb
MUL  10100010 00000aaa 00000bbb
DIV  10100011 00000aaa 00000bbb
MOD  10100100 00000aaa 00000bbb

INC  01100101 00000rrr
DEC  01100110 00000rrr

CMP  10100111 00000aaa 00000bbb

AND  10101000 00000aaa 00000bbb
NOT  01101001 00000rrr
OR   10101010 00000aaa 00000bbb
XOR  10101011 00000aaa 00000bbb
SHL  10101100 00000aaa 00000bbb
SHR  10101101 00000aaa 00000bbb

PC mutators

CALL 01010000 00000rrr
RET  00010001

INT  01010010 00000rrr
IRET 00010011

JMP  01010100 00000rrr
JEQ  01010101 00000rrr
JNE  01010110 00000rrr
JGT  01010111 00000rrr
JLT  01011000 00000rrr
JLE  01011001 00000rrr
JGE  01011010 00000rrr

Other

NOP  00000000

HLT  00000001 

LDI  10000010 00000rrr iiiiiiii

LD   10000011 00000aaa 00000bbb
ST   10000100 00000aaa 00000bbb

PUSH 01000101 00000rrr
POP  01000110 00000rrr

PRN  01000111 00000rrr
PRA  01001000 00000rrr