Subject: Re: [stella] The heart of darkness. From: Chris Wilkson <ecwilkso@xxxxxxx> Date: Mon, 19 Nov 2001 11:42:59 -0500 (EST) |
On Mon, 19 Nov 2001, John Saeger wrote: > In any case, the two scans that I've posted show how the H01 and H02 signals > are generated. I'd be curious to know if somebody could tell me what they > think the waveforms of H01 & H02 would look like. Are they square waves? > How does the phase relate to the input? What kind of propagation delay has > been introduced by the rather elaborate circuit used to generate them? The circuit is actually pretty simple...it's a gray code counter. It generates a 2 phase, non-overlapping clock. At the frequency of the 6502. The 2 phase clock is generated by the 2 crosscoupled flipflops. The graycode is generated by the 2 NOR gates. -Chris ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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