This is an experimental adapter PCB for the pata-gpio driver.
The pinout was chosen deliberately to support faster SMI and BCM2835 register modes,
which are not yet supported in the kernel driver.

Rev.A testboards were ordered but not tested yet. Proceed at your own risk.

Manufacturing files for JLCPCBs automatic assembly service can be found at gerbers/RevA/ATAPIHat-SMI/.
5 adapter boards cost ~15$ (incl. components).

Schematic
Interactive BOM
Bitbanged-GPIO Kernel driver

The PCB layout was done by @Toble_Miner! Thanks!