ah! good info

thanks
not sure how much IO throughput this old 52MB quantum drive can push

tried it with an acard scsi2ide bridge, and cf adapter with 4GB CF card.
on boot the hard disk light pulses as it scans the SCSI IDs for devices, but then takes me back to the floppy boot screen. fair enuff.
stuffed in workbench3.0 install floppy, booted, ran HDtoolbox. no devices found

maybe get the bus terminated, and some 3.1roms in there, and we'll be cooking on gas regarding the acard adapter and CF cards

i've reseated the chips, almost as a matter of course really these days i guess.

one thing i have noticed, plugged a microvitec 1438 into the amber output, and with the 31khz disabled, i get a nice screen, but a little bit of pixel jitter happens now and then. switch amber on, and the screen goes completely out of scan range, still see something, but it's very corrupt.
plugged the microvitec in to the 23pin RGB port via the official silver 23pin to 15pin vga adapter, and a rock solid pal display.
i take it my amber hardware is somewhat non-functional? initally tried running an NEC1780nx multiscan LCD off the amber port, but for both on or off switch positions, i got "signal out of range" notification - hence pulling the old faithfull microvitec out of storage and using that instead.