[A83] Re: AppVars
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[A83] Re: AppVars
I'll try...
;> Is anyone out there good with appvars?
>
;> I created an appvar like so:
> ld hl,appvart
;Okay, that's correct
;> b_call setxxxxop2
;This won't do, it doesn't take the bytes hl is pointing to,
;but the value of hl itself
;> b_call op2toop1
;This won't do too..
;Use
rst rMOV9TOOP1 ; instead, (see appguru ch. 17)
> ld hl,10
;Okay, you want 10 bytes in size...
> b_call createappvar
;Use:
inc de
inc de ; to go to the start of the appvar now.
ld hl,de
; hl now points to the start of the appvar...
;just for code legibility:
jr continue
> appvart: .db AppVarObj,"HELLO",0
continue:
;> Now how would I read from this appvar?? And can I define them as variables,
;> like for instance, HELLO = 3rd byte.
; do "avloc equ [some user space location]" in your programs header
; now:
ld (avloc),hl ; to store your data for future reference.
;to store something to the n'th byte. (location independent code follows)
ld hl,(avloc)
ld b,n ; n = number of byte (0 = 1st byte)
loop:
inc hl
djnz loop
ld (hl), a ; a contains byte you want to store
;to load something from the n'th byte (again, location independent)
ld hl,(avloc)
ld b,n
loop1:
inc hl
djnz loop
ld a,(hl) ; a now contains loaded byte
> THanks for your help
Don't mention it :-)
--Peter Martijn
>
> -joel
>
>
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