[Coco] Assembly Language - Simple Q

[William Mikrut]

GAHHH... LEA instructions.
Dang, I knew it -- I just couldn't remember it.

Thank you very much.
Time for a review of all the op codes!


On Wed, Feb 8, 2017 at 9:59 PM, Brett Gordon <beretta42 at gmail.com> wrote:

> Allen's correct.  But, I feel your question seems to ask about PIC
> coding... in that case it would be  "leax s001,pcr"
>
> On Wed, Feb 8, 2017 at 10:42 PM, Allen Huffman <alsplace at pobox.com> wrote:
>
> > Should this be
> >
> >         ldx #s001
> >
> > ? I think the # is what you are missing.
> >
> > > On Feb 8, 2017, at 9:20 PM, William Mikrut <wmikrut72 at gmail.com>
> wrote:
> > >
> > > org $1200
> > > start ldy #$0400 Point to the start of VidRam
> > > sty $88 Position the Cursor
> > >
> > > ldx s001 Load the address of my data
> > > wrt001 lda ,x+ Get a character from my data
> > > cmpa #$0d Is it end of data?
> > > beq e001 If yes, quit
> > > jsr $a30a Put the character on the screen
> > > bra wrt001 Go do it again
> > > e001 rts
> > > s001 fcc 'THIS IS SOME TEXT!'
> > > fcb $0d
> > > end start
> > >
> > > Simple enough -- go print some text on the screen.
> > > However, one thing bugs me in the compiler output:
> > > That BE 1216 @ 1207.
> > >
> > > Assuming I loaded the program to another section of memory..
> > > Well, you see my dilemma.
> > >
> > > I thought there was a way to signal the compiler to look at the fcc
> > > data xxx bytes down --13 bytes specifically without using a specific
> > memory
> > > location.
> >
> >
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> >
>
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