On Mon, Mar 20, 2017 at 9:14 PM, Steve Thompson <ste...@copper.net> wrote:
> On 03/20/2017 07:45 PM, Steve Smith wrote: > >> Two's-complement is an amazingly great way for binary computers to store >> negative numbers. It is not so great for humans to read or write. >> > <SNIPPAGE> > > ... > > So, don't be so hasty to shoot down two's complement. > I hardly did any such thing. I should have added two's-complement is an amazingly great way to *process* negative numbers. It's almost magic. Thanks to two's-complement, the only difference between signed & logical addition & subtraction is how the condition code is set. > > ... > However, you could, if you really wanted to, ORG back over the instruction > and stick whatever it is you want in the Immediate Byte(s). But don't > forget to also code " ORG , " after you do this just to keep from screwing > the instruction counter... > That's been mentioned before. However, a bare "ORG ," should be used with caution. Especially in a macro, there's the possibility that a previous ORG has already placed you further back than you know. > > Regards, > Steve Thompson > -- sas
