Quote:
Originally Posted by Shadowfire
Oh my god, I checked the A1200 schematic and Commodore didn't terminate the IDE bus on the A1200. Strange since I see it elsewhere in the schematic. I wonder if it wasn't part of the standard back then?
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The
ATA-1 specification does not say anything about termination, only that...
Quote:
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The physical interface consists of single ended TTL compatible receivers and drivers communicating through a 40-conductor flat ribbon non-shielded cable
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Here's a typical ISA bus IDE controller card. Data lines appear to go directly to/from 74LS245 TTL bus tranceivers with no termination.