Re: TI-H: 512k ram


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Re: TI-H: 512k ram




On the cpu-chip. It is not clean 68k, but a custom chip with some extra stuff
built into it.
for a pinout with most of the pins described, see cpu.txt at
http://alh.dhs.org/ti89/

//Olle

Alejandro Paz wrote:
> 
> Olle, what it means pin 17 in wich ic ?
> 
> in the 40000-5fffff area there is nothing (in my internal ROM 1.11), but
> some models has a ROM in this area.
> 
> if we use A1..A19 in the way tha the rom does and uses *we taken from
> the on board chip, i think the mem can be upgraded, but not saw from the
> ti OS, but with a modified FARGO (or TIE) we can access this area as a
> ram disk or something.
> 
> what you think. ?


References: