willem eprom write error

EPROM EEPROM SRAM NVRAM Flash chips, reading/writing hardware and software
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willem eprom write error

Postby BOGSTOCK » Thu Apr 05, 2018 9:39 pm

Trying to write a simple vats removal for BWFU0310

original file reads correct, change vats to disabled and recheck in hex to see 1 byte of data changed all seems good.

write file to eprom and wont verify, check data written and missing bulk sections.

using PCB50B board and willem eprom to read/write, 27C512 device selected and file size is 64KB.

tuner pro rt to edit data and as I said i've checked changes in hex editor and only the one change made. Dip switches all good but for some reason will not write file correctly. What stupid thing am i missing here? I tried a 27C128 memcal and appropriate file and settings, writes 100%.

3 files added, what am I doing wrong??
Attachments
BWFU 0310 STOCK bad write.bin
(64 KiB) Downloaded 21 times
BWFU 0310 STOCK 512.BIN
(64 KiB) Downloaded 25 times
BWFU 0310 STOCK no vats.bin
(64 KiB) Downloaded 21 times

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Posts: 4632
Joined: Sat Feb 28, 2009 8:38 pm
Location: Wellington NZ

Re: willem eprom write error

Postby delcowizzid » Fri Apr 06, 2018 8:23 am

Bad pin connection most likely.i used to have to shuffle the chips around in the zig socket while closing the handle to get the light corrosion off the zif socket
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem

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