Introduction
The Emulex DM01 is a qbus ST506-MSCP interface, which means that ST506 disks are seen as normal MSCP devices, and so can be used by Digital's operating systems. It also includes an SA450 floppy disk interface.
There are four connectors and two switchpacks on the module. J1 is the combined ST506 cable, which splits into control and data for HD unit #1 and HD unit #2 (four cables; maximal length 6 metres), and J3 for the daisy-chained SA450 cable (maximal length 3 metres).
Switchpack 1 (SW1):
Open Closed ---------------------------------------- SW1-1: Run Halt (Reset) SW1-2: (MSCP number) SW1-3: (MSCP number) SW1-4: (MSCP number)Switchpack 2 (SW2)
OFF ON ------------------------------ SW2-1: loop on self-test SW2-2: automatic bootstrap SW2-3: CSR address SW2-4: '' SW2-5: '' SW2-6: 18-bit 22-bit addressing SW2-7: 4 usec 8 usec DMA burst delay SW2-8: adaptive DMANote: the 22-bit addressing option (an additional chip at location U51) must be installed to utilize the 22-bit memory space
CSR address
Switchpack 2 Address 3 4 5 ---------------------- 772150 0 0 0 772154 1 0 0 760334 0 1 0 760340 1 1 0 760344 0 0 1 760350 1 0 1 760354 0 1 1 760360 1 1 1
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| Created by: Ákos Varga | Last modified: |