Right, I've managed to pin down enough information on the chip now I
think. The manufacturer is SST (Silicon Storage Technology) and the full
part number is
39SF020 90-4C-PH 991391-A
From their info catalog the information on that chip is as follows
Competitor part number: AT27C020-90-PC
Vendor: Atmel
Memory Org: 256K x 8
VPP/VCC Range: 5V only
Speed: 90ns
Description: OTP
Package: PDIP
SST Part: SSt27SF020-904C-PH
Comments: 100% drop-in replacement, Program/Erase required external
programmer with support for SST
Does anyone know what an equivilant part would be? Sorry for all this but
I now nothing about electronics and No Computer => No Linux
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