Oversized EPROM's & Multiple Programs

[Walter Sherwin]

To those who are using, or have used, oversized EPROM's that contain more than one program image........

Can you simply select between say Program "A" and Program "B" while on the fly, or do you have to power/idle down and then switch from one to the other?  This would be for a two program solution in place of a single 27c256b chip, for a friend who has new young drivers in the family (think of it as a sort of valet mode).  Is more than 2 images a big hassle in place of a 256 chip?  The selector switch would be a keyed Allen Bradley jobbie.

Anyone have any interesting tidbits archived on this topic, on their HD's, that they can pass along?  I'm going to dive into the list archives over the next few nights, but any direct pointers would certainly help a bunch.

Walt.
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