WILLEPROM PROGRAMMER . MODIFICATION

Done by . 4Z5AY .



The modification came after an attempt to read 29F040 Flash.
The results were very strange.



Parts for the modification:

Wire (Wire Wrap or similar).
DIP switches 2 pole.

Special tools:

Sharp knife (To cut the PCB).


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The modification of PCB SPI 19019900:

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New switches positions

For Normal Programmer Operation (as was):
SW 13-OFF
SW 14-ON

For Use With 29F040:
SW 11-ON
SW 12-OFF
SW 13-ON
SW 14-OFF
all other switches stay in the same position.


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Reference Information.
27C040 Connection Diagram (HTML Format).
29F040 Connection Diagram (HTML Format).

27C040 Data Sheet (PDF Format).
29F040 Data Sheet (PDF Format).

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