Re: TI-H: Internal memory expansion
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Re: TI-H: Internal memory expansion
Yes... Same on all calcs...maybe not the 86 though.
>Would a similar modification be possiable on the TI-86. Also does the
>calculator drain the batteries power significantly faster with this
>modification?
>
>On Wed, 12 Aug 1998 07:20:45 PDT "marcel groenendijk"
><m_groenendijk@hotmail.com> writes:
>>
>>I have made a simple but effective memory expansion on my ti-85. It's
>>like this: On th main pcb there are three ic's, of which the middle one
>>is a 32Kb SRAM ic. I have bought a second one (cost about 5 guilders,
>>which is about 2.5 US Dollars) and i have placed this above the original
>
>>ic. Furthermore i have disconnected pin 20 (Chip Select) of both ic's
>>and used a switch to connect one of them to the main board (used two 10K
>
>>resistors to pull them up to +5V.) This will enable you to put programs
>>and data in the original mem, then switch to the second mem, put
>>different programs in it, switch back to the first mem and use those
>>programs etc. This has as an advantage that you can store more programs,
>
>>use two different shells and if you remove the batteries (the AAA, not
>>the little battery) and you put them back, that the current mem is
>>reset, but not the second mem (nice to cheat in the classroom even if
>>your teacher is smart enough to take out the battery.
>>For more information reply either to ticalc.org or to
>m_groenendijk@hotmail.com
>>If there's enough demand, i can write a doc explaining in detail how
>>to
>>install this ic.
>>
>>Neil
>>
>
>
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