Joined: Thu Mar 12, 2020 10:04 pm Posts: 690 Location: North Tejas
|
blo is an alias for bcc and bhs for bcs
They keep me from forever refiguring out whether the carry flag is set on borrow. The mnemonic device is that the 6502 has it backward for when I have to.
I come from the 680x world where in addition to beq and bne, there are four unsigned relative branches:
blo - branch if lower bls - branch if lower or same bhs - branch if higher or same bhi - branch if higher
I do not alias bls or bhi because they are not equivalent to single instructions.
My own tools currently support only the NMOS instruction set because I consider OSI and early Apple II as significantly important platforms. And I do not use undocumented instructions.
|
|