HowTo: Fast EPP mode 1024 Controller
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virgil skinner)
Step 4 : Controller front end
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The controller consists of 3 basic parts. EPP function Decoder (74LS138), Address/Data storage registers (2 - 74LS573), and a 2-stage address register selection decoder (74LS138 & 74LS154). This is all coupled to a 40 pin IDE (hard disk drive) ribbon cable header to daisy chain to the output register cards.
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