TI-85 link port in asm

TI-85 link port in asm

• To: CALC-TI@LISTS.PPP.TI.COM
• Subject: TI-85 link port in asm
• From: Jani Nikula <jnikula@CC.HUT.FI>
• Date: Thu, 31 Jul 1997 22:33:42 +0300
• Reply-To: Jani Nikula <jnikula@CC.HUT.FI>

Hi -

Here's a few questions concerning programming the TI-85 link port in
assembly (on a non-turboed calculator, using ZShell):

- How fast can you send/receive, bits per second, error free --- in
  practice, not theoretically?
- What is the shortest and most accurate time that can be used as a delay,
  say, using the instruction execution speeds?
- Is there a list of Z80 instruction execution times available somewhere?
- Does the execution speed of an assembly program depend on the amount of
  free memory the way it does in basic and everything else?
- Is it possible to forbid interrupts in a program w/o crashing the calc
  and still use the link port?


I'd just like to know this stuff before I get any deeper into a project
aiming at attaching a new device to the calc... these are quite essential.
Any information that you think is relevant is welcome.

Thanks in advance,

Jani

• Re: TI-85 link port in asm
• From: Mel Tsai <tsaimelv@PILOT.MSU.EDU>

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