TI-H: Medium case and TI-81 ASM
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TI-H: Medium case and TI-81 ASM
Most of the "holes" will actualy be filled in. to use a hole, you pop
out the plastic, which is thinner. These popuots take a little extra
work, but are 100% possible. Also, I have a nice case design that
corrects a lot of size and space problems. It should look fairly nice,
and have all the possible ports.
Also, I was thinking of SPinTerface and RS-232 popuots on the bottom,
and paralel and DBA (direct bus access) on the top. since DBA and
paralel will most likely be used less often, having them on top
shouldn't hurt, and will make molding much easier!!! Most people will
want sound, and to make it fit, it will be nescesary to make a recessed
"Pit" for the volume control. This would not be a popout. The switches
can be popouts though. Someone mentioned a tilting LCD, but that would
be a bit more dificult to mold, and would also get into cutting the
original front half of the case. Put it this way. It would be a pain.
Another idea, is ROM cartridges. The DBA port could possibly contain
programs on ROM!!! have a shell automaticly look for the DBA port on
startup or when a button is pressed and then use it as if it were the
ROM!
What does everyone think. The case would be fairly simple, and allow
major expansion. It would have about an inch extention on the left, and
be even with the right side of the calc. It would probably be 1/2 inch
deeper, and shouldn't be very difucult to build. There would be two
models, one for the 81/82/85 and one for the 83/86. THe TI-92 can come
later.
Final note, I think I may know a way to use ASM on the TI-81!!! We've
been talking a lot lately about Direct bus access. The TI-81 is nearly
identical to the TI-85! If we connected the data and address bus to the
calc and a computer or some type of reader or something, we could look
at each individual memory location in the calc!!! We could find a way to
trick the calc into jumping to an unused address by possibly changing
the memory by manualy writing it to the calc. The address would be a
nonexistent address on the calc, but on a ROM module, it could allow
many, many KB of free memory and ASM!!! a Shell module could be plugged
in and accessed. It would have a through header, so individual ROM or
RAM modules could be added!!!
I'm sure it could work if anyone wanted to try it! Imagine the
possibilities. This would also probably work on the TI-80 and every othe
link capable calc!!!
Richard Piotter
richfiles1@hotmail.com
The Richfiles TI Page
http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html
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