17-03-2022, 11:08 AM
Someone can't help with a source of WD2793's but:
Someone's resorted to using the later industry standard WD3765 derivatives but these don't support odd floppy disk formats like the microbee.
31_WD37C65C.pdf (bitsavers.org)
The nice thing about the later versions is that they're buffered and can handle faster transfer rates.
From a jaded memory, the standard microbee can't handle the faster data transfer rates of the higher capacity disks unless the CPU frequency was boosted to 6MHz or more because doesn't use DMA thus uses software polling.
IDE Floppy disks, SuperFloppy, ZIP Drives & CDROMS, can also be used but it requires a substantial overhead to manage the ATAPI protocol overheads.
Someone's resorted to using the later industry standard WD3765 derivatives but these don't support odd floppy disk formats like the microbee.
31_WD37C65C.pdf (bitsavers.org)
The nice thing about the later versions is that they're buffered and can handle faster transfer rates.
From a jaded memory, the standard microbee can't handle the faster data transfer rates of the higher capacity disks unless the CPU frequency was boosted to 6MHz or more because doesn't use DMA thus uses software polling.
IDE Floppy disks, SuperFloppy, ZIP Drives & CDROMS, can also be used but it requires a substantial overhead to manage the ATAPI protocol overheads.