Re: A85: FA70-FBFF?

To: assembly-85@lists.ticalc.org
Subject: Re: A85: FA70-FBFF?
From: Jimmy Mårdell <mja@algonet.se>
Date: Mon, 25 Aug 1997 22:47:24 -0700
References: <872539874@cedarcity.net>
Reply-To: assembly-85@lists.ticalc.org

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

Follow-Ups:

Re: A85: FA70-FBFF?

From: Dines Christy Justesen <c958362@student.dtu.dk>

References:

Re: A85: FA70-FBFF?

From: richardlewis@cedarcity.net (Richardlewis)

Prev: Re: A85: FA70-FBFF?
Next: A85: SCHEMATICS
Index(es):
- Main
- Thread