Re: Mockingboard Schematic in GIF form

[mjmahon@aol.com (Michael J. Mahon)]

"a" wrote:

>Yet another question for Bill and Michael.
>I think the input to the delay circuit needs to be phase-1, not phase-0.
>This is another difference between the two schematics in discussion.

You are correct.  Again, the .jpg scan is correct.

>My thoughts on this are:
>- phase-0 and phase-2 are mostly in phase - the question is how to
>delay phase-0 to make a psuedo phase-2.
>- phase-1 (as available on the apple bus) is directly out of phase
>with phase-0.
>- since we need phase-2 and we're using 3 inverters (which
>ultimately inverts the phase of the first input) we should be putting
>in phase-1 rather than phase-0

That's correct--in this circuit, there are an odd number of inversions
of the input, so Phase 1 is the correct signal.

>thanks again.  I appreciate your helping hand for this novice hobbyist.

You're doing all the work!  ;-)

-michael

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