Sharp PC-G850VS Reflashing?

[toml_12953]

(09-21-2018 06:00 PM)Zaphod Wrote:  

(09-21-2018 05:54 PM)toml_12953 Wrote:  The ROM of the VS model (not the V model) is in Flash memory which means it can be changed through software. Does anyone know how? My goal is to translate the STAT and BASE-N menus to English. This should be doable as long as the computer doesn't do a checksum calculation on the ROM. I just need to know how to get the code out of ROM and rewrite it after I change it. If I can do it, I'll make the ROM image available to anyone who wants it.

I was literally thinking about this last night, I was gonna rip my spare 850 open and see what’s knocking about inside.
(I.e. what hardware is actually in there)
There might even be an opportunity to up the memory , I’ve not studied the memory map too closely yet though as to what’s already been apportioned to what.

One may be able to read the ROM with the built in MON at least.

And indeed, as long as it doesn’t checksum itself then it should be easy peasy.

I had a thought (I occasionally do!) The author of the Sharp calculator emulator must have been able to get the ROM out somehow.

http://pockemul.free.fr/

Tom L