helwie has raided his archives and found the assembler source for a clock driver for the P30 that sets the PIT specifically to 100kHz smile
He's also included the schematics for a SASI adapter to connect an early Syquest drive to the Alphatronics. DOS on the P30 is supposed to contain the driver that is needed, and there are assembler sources to modify CP/M.
I've uploaded his stuff to the FTP.

NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20