Re: HELP with ASM programming of TI-83


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Re: HELP with ASM programming of TI-83



>   erabrow@xvnews.unconfigured.domain (Browall Kenneth) writes:
>
>  Hello again!
>
>  Some days ago I asked a question about how to use the
>  link port and unfortunatly I didn't get abny answer :-(
>  I the nobody out there with some ASM experiance on the
>  TI-83 who can help me? Please!
>
>
>
>  The only question I have is:
>           On what address is _IO_EXEC located?
>           ====================================
>
>
>  The rest below is a copy of my previous posting just to
>  explain my needs.
>
>
>  I am trying to use the link port of my TI-83 from assembler.
>  I have read the page http://www.ti.com/calc/docs/83asmlnk.htm,
>  but have problems understanding some parts. In the second part
>  it is said that a value is stored at ASM_IND_CALL. Is that the
>  different values of ASM_IND_VALUE like 11d, 19d, 20d and 22d?
>  After that you are suposed to call _IO_EXEC, but I can't find
>  the adress for that in ti83asm.inc.
>
>  Where can I find it???
>
>  My understanding is that what I have to do is something like this
>  to send a byte:
>
>  _IO_EXEC equ ??????    ; Where to call????
>  LD A, 30h              ; Load the value to send in Acc
>  LD B, 11d              ; Indicate that Acc is to be sent
>  LD (ASM_IND_CALL), B   ; Store
>  CALL _IO_EXEC          ; Send it!
>
>  Is this correct understood?
>
>  If it is, can you please tell me the value of _IO_EXEC
>  or where I can find more info.
>
>  Best regards,
>           Kenneth
>>>>
You must have missed my follow-up posting.
I suggested you send e-mail to asm-83@ti.com
and inform TI of their oversight. You will probably
get an informative reply in a few days.


                        Harry


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