Basically the point of this driver, is we can eliminate the need for HDDs AND floppies. Build a disk image with the serial driver, and put it into the ROM. like done previously.

Then SD cards can be mounted that contain your apps/etc... Slow yes, workable. yes...

This would work wonders in the PB1XX series units if we could hack in flash to replace ROM, Then I could put the SD card reader where the HDD used to be, and tap the serial lines.

Or the other possibility is building a special system file that does what the HD20 driver would do in ROM. Basically it loads a minimal system to initialize the serial disk driver, once it finds a blessed system disk image, it transfers boot to the system on the disk image.

possible? maybe, i dunno. I guess the first step would be to look at how they did it with the HD20.