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Computer I/O With Single Phase Strobing Disclosure Number: IPCOM000047518D
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07

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Kimberly, DW Sabol, J Troop, WC [+details]


This I/O strobing technique can be used relative to the "integrated Digital Input/Output Non-Isolated Attachment" feature of the IBM Series/1 processor (reference sales literature publication GA34-0031-1, "IBM Series/1 Attachment Features Description") for simplifying and reducing the software associated with the direct control of the attachment feature. With the present "single phase" technique, a strobing signal presented to the device at the attachment feature interface --which ordinarily must undergo two phase reversals for each discrete data byte transfer between the attachment feature and the device (an "on" reversal and an "off" reversal) -- is manipulated under direct control of the Series/1 software to undergo only a single phase reversal per transfer.