[TI-H] Re: building a TI92plus module
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[TI-H] Re: building a TI92plus module
On Sat, Jan 04, 2003 at 11:17:58PM +0100, docydoc wrote:
> Should be possible to emulate that "orbit" chip anyway.
How can it be done?
> Why not putting a SRAM/FLASH/uPC on the plus+ module
> and control the _WE pin of the flash with the uPC?
> So the calc will think it's an original one.
Or the _CE pin? (It seems _WE is in common between RAM and flash.)
What do you mean by uPC?
> Maybe also a PAL is enough to do so but I'm not so familar.
Mhm, just heard but nothing more. Can we make a sequential circuit with
PAL? (as the orbit chip seems to be?)
> If it helps i could desolder the Flash and read it completely
> with an external programmer device...
I have a rom dump used to run the tiemu emulator (derived from XTiger).
Should it be good, souldn't it?
> The instruciuton code in that module is it MC68k code or other?
> not so difficult to reassemble the first 64k and maybe also patching it
> so the TI boots up without the orbit chip :-)
It should be very useful!
As far as I've read in Internet it's MC68k code.
Bye,
Ludovico Cavedon
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