Reply to "HELP Seiko S129 / S149 data output jack"

Former Member

I recevied a PICAXE microcontroller last week, and I've been able to hook it up to my S149 and started to play around with observing the data on he 4-bit bus. However, 2 things don't quite match my expectations:

1) I think I'm seeing at least one of the bits on the data bus (DB3, the MSB) wiggle even when there is no data to be sent. Do I have a flaky connection or is this expected behavior?

2) My first impression was that BUSY is an output from the timer. Now I'm beginning to think it's an input TO the timer, to be used for handshaking between the timer and the out-board serializer I'm building.

Can anyone offer some clarification here?

4/25/0712:35 PM

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