Re: TI-H: RAM expansion (sort of)


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Re: TI-H: RAM expansion (sort of)




>>Has anyone seen the RAM/IO expander on Mel's website, the one with the
>>74LSXXX TTL logic IC's??  Well last night I got the parts need to make
>>it(plus some Z80s!!) and am going to breadboard it tonight(with some
>>modifications).  I also have to make the driver software, but that will
>>be easy.  I;m going to use 3 32KBx8 Static RAM chips(That's 96KB of RAM,
>>plus the 28K already on the 85!! Whoohoo!!!).  Next I'm going to make an
>>(E)EPROM program for it so that I can burn them w/o getting an $150
>>programmer.  For those interested, here's the address to the page:
>>http://www.egr.msu.edu/~tsaimelv/download.htm
>>download the zip file exp_old.zip.  It has all the info needed.
>
>
>Heh well I really wouldn't recommend building that thing... Using a
>microcontroller is 100x more efficient and has a lot better chance of
>working.

Expect .5k a sec on a good day...  :)



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