Hi, I seemed to remember there was problems with the Aurora manual which did not match the I/O connectors, I think there is mistake on the serial port as well. Did you get the Aurora board working? Nearly there - I have a backplane to solder up, and a modified qubide board to put together (extra ID...

Looks like it's pins 1 and 4 that need to be swapped for Amiga Mouse - which would be 1 and 7 on the IDC cable H and V movement swapped for Amiga

so straight through IDC is for Atari - not Amiga as documented in the Aurora manual...

My confusion comes from this -

In the Aurora manual there is a nice lovely section on the mouse port numbering - but it has left me even more confused than ever! I understand the IDC header numbering goes odd down one side of the connector and even down the other side - so the idc cable would then be 1-2-3-4-5-6 and so on, (only ...

It's my understanding that the ROM version just copies itself into RAM anyway, and then fixes the I/O address base to what it would have been if running from the ROM as that's where it expects the hardware to be located - the REXT version needs to be configged with that information I think

It may even be that replacing the components has made better solder joints and you may have 'cured' a dry joint in the process. Poor solder connections can act like all sorts of components, and the behavior is unpredicatble.

I think there is a copy of the manual in this version on Dilywin's site:

http://www.dilwyn.me.uk/asm/talentaw22.zip

I remember using this some 20 odd years ago - for the release I had, you still had to have the original microdrive in MDV1_ or it wouldn't run properly

Not sure if the version you have has that security block removed?

+1 on that - diodes are not good as pull ups !

You could make use of a DS1210 chip to gate control of your /CE based on power supply readiness - this would protect the chip from write corruption when you switch off the main power.

https://datasheets.maximintegrated.com/en/ds/DS1210.pdf