> Problem is, you can't really tristate an input. No matter what, you > will always have the input stage visible as a load. Holds true with > TTL too. You can cut it off, just like you can cut off an output. On the NMOS processes we're concerned with here (and probably most MOS processes) this has _higher_ leakage than the inputs themselves though! > But the real question is, what signals of the 6510 are controlled > by AEC? The 'A' stands for 'address', but does it also control > other signals including the data bus? From the 'scope readings I'd > say it also controls R/_W, but can't really say anything about the > data lines. The 6510 datasheet claims AEC tristates R/#W, A, and D. Segher Message was sent through the cbm-hackers mailing listReceived on 2012-09-18 19:01:08
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