[TI-H] Re: TI-89 HW2 overclocking
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[TI-H] Re: TI-89 HW2 overclocking
Yah, its 2 128k chips. You shouldn't use more memory then the m6800 in
the 89 can address since that's just a waste of money. Does the Ti-89
use all of its Addressing space?
--
S.D.
-----Original Message-----
From: ti-hardware-bounce@lists.ticalc.org
[mailto:ti-hardware-bounce@lists.ticalc.org] On Behalf Of B.A. Baracus
Sent: Wednesday, February 26, 2003 3:15 PM
To: ti-hardware@lists.ticalc.org
Subject: [TI-H] Re: TI-89 HW2 overclocking
On Wed, 26 Feb 2003 20:05:51 +0100, Olle Hedman <alh@home.se> wrote:
> Another thing to do if you anyway are going into the calc, and
replacing
> the ram chip, is to cram in a 2MB chip instead of the 256K one.
> or atleast 512 or something.
> the memory area between 0 and 0x1fffff is reserved for ram, but only 0
-
> 0x3ffff is used, so it should be fairly simple.
> Maybe find a chip that is as pin compatible as possible, and bend up
the
> pins not compatible and solder short wires from these.
> I don't remember, is the ram repeated in this 2M area? if so, its even
> better, no need to change the chip select wiring, just use the old
one.
> just add some more wires for the extra adress pins.
instead of the 256K one? but the 89 uses two 128K chips...
--
B.A. Baracus
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