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HOWTO: Switch Chip

Making a chip that is switchable


Normal LH BINs are 32k, but the 27SF512 has 64k of space. By overriding one of the address lines on the chip, we can create two "virtual chips" using one physical chip.

Tools:
Wire cutter
Chip burner

Materials:
SST 27SF512 or equivalent
Short section of wire
1KО© Resistor

Burning the chip


The first step is to create a 64k BIN file, using two 32k bin files. There are various ways to do this, but the moste straightforward is the BIN stacker in TunerPro (which is made for this purpose)


-- to be continued --


27sf512-switch.jpg
switch-chip.jpg

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