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VIA T2 doesn't count manually-induced PB6 pulses #56

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mattgodbolt opened this issue Sep 17, 2024 · 0 comments
Open

VIA T2 doesn't count manually-induced PB6 pulses #56

mattgodbolt opened this issue Sep 17, 2024 · 0 comments

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@mattgodbolt
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Reported by @tom-seddon on mattgodbolt/jsbeeb#268 but also happens in beebjit (where shamelessly I was going to steal from)

@tom-seddon says:

T2 should count PB6 pulses that are induced by changing ORB or DDRB. See attached disc - load image, run with SHIFT+BREAK. Expected output:

T2=100 (&64)
TOGGLE IN OUTPUT MODE
T2=100 (&64)
T2=99 (&63)
T2=99 (&63)
T2=99 (&63)
TOGGLE VIA DDRB
T2=99 (&63)
T2=98 (&62)
T2=98 (&62)

VIA.PB6.ssd.zip
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