Re: A85: FA70-FBFF?
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Re: A85: FA70-FBFF?
I think that it is very likely that SP is reset every time you press 2nd
OFF. If you turn off the calc while you are doing something lots of info
most be saved on the stack, and when you return you just end up at the
homescreen (almost nothing on the stack).
Dines
_______________________________________
Dines Justesen
Email: dines@post1.com or
c958362@student.dtu.dk
WWW : http://www.gbar.dtu.dk/~c958362/
_______________________________________
On Mon, 25 Aug 1997, Jimmy Mårdell wrote:
> Richardlewis wrote:
> > Couldn't you move the stack, then change the stack pointer?
>
> Sure, no problem (I think). But where would you move it? You could
> change
> SP to $FAFF and have $FB00-$FBFF free, but what have you gained? Still
> no interrupt table :-( And you could use the area $FA70-> instead of
> moving the SP (which could get reset by the TI-ROM, although I doubt
> that).
>
> > I even got an idea on how to load SP in to HL (there is no direct Z80
> > command to do that).
> >
> > Here is the source to ld HL,SP:
> >
> > ld HL,$0000 ;HL = 0
> > add HL,SP ;HL = SP (0+SP)
> >
> > easy enough!
>
> Yeah, the TI ROM uses that way to get the stackpointer.
>
> --
> Jimmy Mårdell "We are the crown of creation
> mailto:mja@algonet.se we may do whatever we please
> http://www.algonet.se/~mja Fuck nature, man rules!"
> IRC: Yarin Fuck Nature /Cat rapes dog
>
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