MirOS Manual: esp(4)

ESP(4)                 BSD Programmer's Manual (SPARC)                  ESP(4)


     esp - ESP NCR 53c94 on-board or SBus SCSI controller


     dma0 at obio0 addr 0xfa001000 level 4              (sun4/300)
     esp0 at obio0 addr 0xfa000000 level 4 flags 0xff0f

     dma0 at sbus0 slot ? offset ?                      (on-board)
     esp0 at sbus0 slot ? offset ? flags 0xff0f         (sun4c)
     esp0 at dma0 flags 0xff0f                          (sun4m)

     dma* at sbus? slot ? offset ?                      (SBus SCSI)
     esp* at sbus? slot ? offset ? flags 0xff0f         (two flavours)
     esp* at dma? flags 0xff0f                          (depending on model)


     The esp is an on-board or SBus SCSI controller based on the NCR 53c94
     chip, found on Sun 4/300, sun4c and sun4m workstations.


     Bits 0-7    Disable disconnect/reselect for the corresponding target
     Bits 8-15   Disable synchronous negotiation for target "[bit - 8]"

     The esp device flags may be OR'd together to enable any combination of
     the features listed above. Targets 4 through 7 typically have
     disconnect/reselect enabled on the premise that tape devices normally
     have one of these targets. Tape devices should be allowed to disconnect
     for the SCSI bus to operate acceptably.


     cd(4), ch(4), intro(4), sbus(4), scsi(4), sd(4), si(4), st(4), sw(4),

MirOS BSD #10-current           March 4, 1998                                1

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