Manual browser: esp(4)

ESP(4) Kernel Interfaces Manual ESP(4)


espNCR 53C9x, Emulex ESP406, and Qlogic FAS408 SCSI driver


ISA bus

esp0 at isa? port 0x230 irq ?


esp* at pcmcia? function ?


esp* at mca? slot ?


esp0 at obio?
esp1 at obio?


esp0 at obio0 flags 0x00ff


esp0 at obio0 addr 0x66000000 ipl 2 flags 0xff0f


dma0 at obio0 addr 0xfa001000 level 4 (Sun 4/300)
esp0 at obio0 addr 0xfa000000 level 4 (Sun 4/300)

dma0 at sbus0 slot ? offset ? (sun4c and sun4m)
esp0 at sbus0 slot ? offset ? (sun4c)
esp0 at dma0 (sun4m)

dma* at sbus? slot ? offset ? (Sbus)
esp* at sbus? slot ? offset ? (SBus, older PROMs)
esp* at dma? (SBus)

scsibus* at esp?


The esp driver provides support for the NCR 53C90, 53C94 and 53C96; Emulex ESP100, ESP100A, ESP200 and ESP406; and Qlogic FAS216 and FAS408 SCSI controller chips found in a wide variety of systems and peripheral boards. This includes the Qlogic ISA and VLB SCSI host adapters, and the Sun Fast SCSI buffered Ethernet for Sbus (FSBE/S, X1053A, Sun part # 501-2015).

For Qlogic PCI SCSI host adapters, use the isp(4) device.


The esp driver supports the following flags for use in config(1) files:

bits 0-7:
disable disconnect/reselect for the corresponding SCSI target
bits 8-15:
disable synchronous negotiation for the corresponding SCSI target
bits 16-23:
disable tagged queuing for the corresponding SCSI target

“Target” is synonymous with SCSI ID number.

Note that SCSI tape drives should be allowed to perform disconnect/reselect or performance will suffer.

December 3, 2001 NetBSD 7.0