Re: A89: what can possibly be wrong?
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Re: A89: what can possibly be wrong?
>This is my keylib.asm library:
>
> include "doorsos.h"
> xdef _ti89
> xdef _ti92plus
> xdef _library
> xdef keylib@0000
>keylib@0000:
> tst.w (doorsos::kb_vars+$1C) ; has a key been pressed?
> beq \put_zero ; if not, go to put_zero
> move.w (doorsos::MaxHandles+$1E),d0 ; puts the value of the
>keypress
>into d0
> clr.w (doorsos::kb_vars+$1C) ; clear key buffer
> bra \done ; exits out
>\put_zero
> move.w #0,d0
>\done
> rts
> end
>
>However, when l try to call this library from an program, l either get the
>message "function did not return a value" or "Illegal instruction" appears
>on
>the status line and the program exits. lt seems to me that whether or not
>a
>key is pressed that a value is moved into d0, but yet the messages say no.
>What is happening?
>The C program is calling the library, and in doing so it stores whatever
>keylib@0000 returns in d0 into another variable.
>
>--TurboSoft
>
Well, sometimes shit happens: To get the key value into d0, make sure you
replace 'doorsos::MaxHandles' with 'doorsos::kb_vars'
i.e.:
move.w (doorsos::kb_vars+$1E),d0
I believe this should work!
See ya,
Michael
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