As jt wrote the SuperMac adapter is just a pass-through for the PDS slot.
The actual adapter which makes the Turbo040 work in the SE/30 has one or two PLDs on board which massage some signals to convert them from SE/30-PDS- speak into IIci-cache-slot-speak.
Presumably, Artmix reverse engineered those PLDs in order to build his riser card.
The actual adapter which makes the Turbo040 work in the SE/30 has one or two PLDs on board which massage some signals to convert them from SE/30-PDS- speak into IIci-cache-slot-speak.
Presumably, Artmix reverse engineered those PLDs in order to build his riser card.