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Sharp PC-G850VS Reflashing?
09-21-2018, 09:01 PM (This post was last modified: 09-21-2018 10:03 PM by Zaphod.)
Post: #3
RE: Sharp PC-G850VS Reflashing?
The Flash ROM is an EN29F040A-70TCP (512Kbit x8)

There are two COB devices close to the LCD (One is much larger than the other, but both linked to display area.)
Another COB virtually next to the Flash ROM (potentially the user-program RAM ?)
The Flash ROM and the S1L50752 (35.7k ASIC Gate array) are the only non-COB devices

Datasheet for the Flash:
http://pdf.datasheetcatalog.com/datashee...9938_1.pdf

Datasheet for the ASIC:
https://global.epson.com/products_and_dr...000473.pdf

That's all for now, I've got various pics of the board too

By the way, discovered the built-in MONitor is blocked from accessing certain areas of the map (for obvious reasons)
Smile
So we'll have to go in via the 40way system bus connector
I'm hoping this is universal for the sharp's ?
I thought I'd seen the pin out in the English manual, but I can't find it right now
I found a pin out for the PC-E220 which is probably the same
http://wwwhomes.uni-bielefeld.de/achim/p...on-bus.txt
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Messages In This Thread
Sharp PC-G850VS Reflashing? - toml_12953 - 09-21-2018, 05:54 PM
RE: Sharp PC-G850VS Reflashing? - Zaphod - 09-21-2018, 06:00 PM
RE: Sharp PC-G850VS Reflashing? - Zaphod - 09-21-2018 09:01 PM
RE: Sharp PC-G850VS Reflashing? - Zaphod - 09-22-2018, 08:48 AM
RE: Sharp PC-G850VS Reflashing? - Zaphod - 09-22-2018, 10:51 AM
RE: Sharp PC-G850VS Reflashing? - Zaphod - 09-22-2018, 02:48 PM
RE: Sharp PC-G850VS Reflashing? - Zaphod - 09-22-2018, 05:24 PM
RE: Sharp PC-G850VS Reflashing? - foroplus - 09-22-2018, 05:28 PM
RE: Sharp PC-G850VS Reflashing? - Zaphod - 09-22-2018, 05:32 PM
RE: Sharp PC-G850VS Reflashing? - Zaphod - 09-22-2018, 05:31 PM



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