Re: TI-H: Link port
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Re: TI-H: Link port
Osma Suominen wrote:
>
> Andy Johnson wrote:
> >
> > Could anyone explain to me how to directly read/write to the link port
> > in asm without using rom calls or zshell routines?
>
> Look at TI-PORTS.TXT and PORT_7.TXT. You should find them at
> www.ticalc.org. But here's some help:
>
> Reading:
>
> Use in a,(7) and bits 1 and 0 show the status of the W and R wires,
> repectively.
>
> Writing:
>
> ld a,x
> out (7),a
>
> where x is:
>
> $c0: R=1 W=1
> $d4: R=0 W=1
> $e8: R=1 W=0
> $fc: R=0 W=0
>
> Some other values for x will work too, look at TI-PORTS.TXT.
>
> -Ozone
>
> --
> *** Osma Suominen *** ozone@clinet.fi *** http://www.clinet.fi/~ozone
> ***
Apparantly my copy of ti-ports got truncated somewhere. It stops at
port 4. I'll go get one that's a little more useful. Thanks for your
help everyone.
--
Andy Johnson
References: