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Old 28 June 2020, 15:45   #1
bwldrbst
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Join Date: Nov 2015
Location: Perth, Australia
Posts: 56
Possible CIA problem

I've been trying to diagnose an issue with my A2000.

The external floppy port doesn't seem to work at all - a drive connected to it does not do anything. No sound, no flash of the LED. It doesn't seem to be getting power. The drive works fine on another Amiga.

Also, the parallel port does not work correctly. I've been trying to get a plipbox working with it. The plipbox detects when I try to bring it online but the TCP stack is unable to acquire an IP address. Trying to send a packet from the plipbox to the Amiga gives an error. The plipbox also works fine on another machine.

I've tried exchanging both CIAs with spares that I believe are good but there was no change in behaviour.

Where should I look next?

Cheers,

Andrew
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