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doc/sms/at28: add note about CE-inhibit jumper
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@ -24,3 +24,11 @@ prototype, I hard-wired the first chip's WE to high because I
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never want to write to it, despite bugs I might introduce in
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hardware or software (I try a lot of dangerous stuff on my
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machines...).
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On top of that, you will likely want to add a physical CE-
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inhibit jumper (a jumper hard-wired to VCC) on the AT28 socket.
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The reason for this is that if the EEPROM you have on your
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socket ends with a SEGA TMR signature, it will be a wrong one,
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but it will still be picked up by the BIOS and Collapse OS will
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refuse to boot. A CE-inhibit switch that you can remove after
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boot will solve the problem.
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