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willem eprom write error

Posted: Thu Apr 05, 2018 9:39 pm
by BOGSTOCK
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??

Re: willem eprom write error

Posted: Fri Apr 06, 2018 8:23 am
by delcowizzid
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