Re: TI-H: Link port

Re: TI-H: Link port

• To: ti-hardware@lists.ticalc.org
• Subject: Re: TI-H: Link port
• From: Osma Suominen <ozone@clinet.fi>
• Date: Wed, 04 Jun 1997 14:45:33 +0000
• References: <199706020317.WAA26618@tuttle.kansas.net> <3392cd23.326028@pilot.msu.edu> <33949A62.3CEB@sisna.com> <3394c262.172923@pilot.msu.edu> <3394C5EB.395F@sisna.com>
• Reply-To: ti-hardware@lists.ticalc.org

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
***

• Re: TI-H: Link port
• From: Andy Johnson <prjohnson@sisna.com>

• Re: TI-H: Radio Link progress?
• From: Josha Foust <foustj@kansas.net>
• Re: TI-H: Radio Link progress?
• From: tsaimelv@pilot.msu.edu (Mel Tsai)
• Re: TI-H: Radio Link progress?
• From: Andy Johnson <prjohnson@sisna.com>
• Re: TI-H: Radio Link progress?
• From: tsaimelv@pilot.msu.edu (Mel Tsai)
• TI-H: Link port
• From: Andy Johnson <prjohnson@sisna.com>

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