[A83] Re: finding the absolute value of hl
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[A83] Re: finding the absolute value of hl
Yea, I should have done more of that. I haven't figured out the
breakpoints in flashsim yet, and I cannot get VTI to work. I often print
out the source and work throught it manually. Anyhow, I am feeling kind
of stupid now.
MWM
On Mon, 04 Au 2003 14:17:21 -0400 brandon sterner <bms9019@rit.edu>
writes:
> When you're desperate try using an emulator and break points, then
> trace
> through the routine in question instruction by instruction. This
> debugging
> technique works for all but a few very special cases like when
> timing is an
> issue.
>
> brandon
>
> ----- Original Message -----
> From: "Matthew W Marshall" <matthewwmarshall@juno.com>
> To: <assembly-83@lists.ticalc.org>
> Sent: Monday, August 04, 2003 11:54 AM
> Subject: [A83] finding the absolute value of hl
>
>
> > Hi all! I just have short question for a quiet mailing list...
> > to find the absolute value of hl, is there anything wrong with
> this?
> >
> > bit 7,h
> > jp z,HL_Is_Positive
> > ex hl,de
> > or a
> > ld hl,0000h
> > sbc hl,de
> > ex hl,de
> > HL_Is_Positive:
> >
> > I cannot see anything wrong, but I am fighting with this
> horrendous bug,
> > and I am becoming desperate!
> >
> > MWM
> >
> > ________________________________________________________________
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>
>
>
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