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OSWORD &BB (187) - Read/Write Morley RAMdisk

NB: Cannot be called across the Tube, and cannot transfer across
the Tube.
On entry:
 XY?0   = 0 for read, &80 for write
 XY?1,2 = I/O memory address
 XY?3,4 = RAMdisk start sector
 XY?5   = number of 256-byte sectors to transfer
On exit, control block unchanged

See Also

Jgharston 14:22, 26 May 2009 (UTC)