The board could support 5" and 8" floppy disks.  It had 24-bit DMA addressing capability. it had an onboard PROM for power on boot.  There was onboard RAM for sector de-blocking to conserve valuable RAM space above the BIOS.  There was an interface for a Western Digital 1001 hard disk controller as well. The board had full 16-bit port addressing. The board had its own onboard 4MHz 8085 CPU.

Full track buffers allowed the controller to recall entire tracks, not just sectors. This gave great speed increases (typically 3-7X other systems).