On Mon 28 Jul 2025 at 21:41:10 +0200, André Fachat wrote: > What do you mean that in the real hardware, CB1 and CB2 are connected to > each other? They are not. CB1 is shift register clock, CB2 is shift register > data, both independently either in or out, depending on internal vs external > clock and data direction. No, I meant that the output of CB1 is sensed by the input of CB1, and that the output of CB2 is sensed by the input of CB2. For example, for CB1: http://forum.6502.org/viewtopic.php?f=4&t=7241#p93990 """ CB1 is the clock input/output for the shift register. Depending on tha ACR4..2 shift register configuration Bits described in "9) ACR,PCR registers", CB1 either is fed by an external clock, or emits a clock signal generated by "22) shift register control". In both cases, an edge detector in "20) CB1" senses the CB1 pad, reports an active edge back to some circuitry in "22) shift register control" which then generates the clock signals for shifting/counting the Bits. """ (sorry for the incorrect subject line; I wanted to ask a question but I think I found the answer while formulating it :) -Olaf. -- ___ Olaf 'Rhialto' Seibert <rhialto/at/falu.nl> \X/ There is no AI. There is just someone else's work. --I. Rose
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