Req: Embedet os for Point of sale system (pos).

[dR-mR]

I have Pos Bleep  Ts-750-E06 cash register.
 It has cf card with os and pos software, the card is damaged so it doesn't starts  it is stacking on loading system.
The seller near me  sed thet the cash register is running on some ER4 OS, i wasn't able to find anything for that os.

I need som os which is able to run on cf card (the original was 128mb) the procesor is intel 600 mhz, it has 256 mb ram the motherboard is  HannStar  K MV-4  94V-0
Any suggestions

[Gallymimu]

FYI 94V-0 isn't a part number it is a flame rating for the circuit board.