tnfw0@isuvax.iastate.edu (06/06/91)
Minor technical question here: How does the computer know when a cartridge is
or is not going to supply the data for a memory access... To explain better
what I mean, I will give the context of my question: The SpartaDOS X cartridge
(I assume, I don't have the cart yet) can make itself virtually invisible to
the computer so that RAM underneath can be accessed. How exactly does the
computer know to use internal RAM rather than the cartridge ROM? Ooops, in
thinking about how to write this question, I think I answered my own
question... Well, someone can confirm it for me :). There is a line on the
cartridge port that is held high (or low) when the cartridge wants the data
bus, right?
Steven Ourada