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For those who may be interested. I've updated the remora-spi component to now interrogate the device tree to determine the hardware being used.

github.com/scottalford75/Remora/tree/mai...omponents/Remora-spi

I thought EINT might be the issue, there's a 1k pullup to 3.3v, the top 8 data lines have a 1k pull down.

Might be C5 around the L1 inductor, I installed a 100nf cap instead of a 4.7uf.

I don't know if that will make a lot of difference.

I've run a config, no hardware connected to the board yet, but no errors. Tho I assume writing to the flash is more of a load. It's bound to be something stupid on my behalf.

The major difference is the WP on the flash is just held high, any chance that the circuit around the WP on the flash is causing the issue, there's no reset device connected. Tho the EPP & SPI based on the 7c81 have been the same.

Thanks for the response!

I used some of the settings from the following page:
www.centroidcnc.com/dealersupport/tech_b...tins/uploads/295.pdf

I have Pn000 at 0010H and Pn002 at 0100H PN200 isn't set as in the document, it is set for positive pulse and direction input.
I've also gone through the sigma II manual especially the trial procedure and tried to go through the settings that seemed relevant.
I'm aware of the power reset to make some settings take effect.