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How does the STE detect floppy drive?

Problems with your machine in general.
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JezC
Posts: 2753
Joined: 28 Aug 2017 23:44

Re: How does the STE detect floppy drive?

Post by JezC »

Ok, that makes sense...in a way.

Have you tried the various pull-up fixes that exxos has posted elsewhere (I will try & find the thread if it's not clear which one I mean, possibly one about mandatory fixes) - I think that there was something relating to (missing?) resistors on the original design & having to fit some (or change the values) when replacing the original floppy with another...

It's a good few months since I first read it, so I may have mis-remembered some of the details (old age seems to be affecting my memory nowadays :? :roll: )

Edit: See below for the databus pull-ups to helpwith DMA to HDD & FDD/Ultrasatan etc.
https://www.exxosforum.co.uk/forum/viewt ... xes#p27505
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Tomswork
Posts: 776
Joined: 22 Nov 2019 22:05

Re: How does the STE detect floppy drive?

Post by Tomswork »

I'm sure my gotek cable has a twist to maintain pin 1 to 1 but some of the address line a0 to a2 on the sound chip are not buffered so a ground short could be bad.

Tom
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