[TI-H] Re: TI-89 HW2 overclocking
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[TI-H] Re: TI-89 HW2 overclocking
Don't certain srams have special commands? If this is true for the
memory in the T-89 then it would be almost impossible to find suitable
ram. It seems like TI wouldn't use any special ram like that on Graphing
calculators for students, but its worth checking out just in case. If it
doesn't have any special commands than everything should be ok. You
should check the trigger voltages too. They might different in the ram
Ti is using and the ram your looking at.
Now, for the crux of my inquiry:
Could the SRAM modules on the TI-89 HW2 be replaced with SRAMs from
another
manufacturer that have identical voltage/pinout/memory width/size
characteristics,
but have faster access times?
One candidate I have found:
Cypress CY7C62128V-55, has 45ns "write pulse width", giving theoretical
max
CPU
speed of 22.2MHz.
(datasheet: http://www.cypress.com/cfuploads/img/products/38-05061.pdf)
Anyone more knowledgeable than I is welcome to comment on the validity
of
my
assumptions and conclusions.
--
B.A. Baracus
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