Technical data

mcis(7D) Devices SunOS 5.5

NAME mcis − low-level module for IBM MicroChannel host bus adapter

AVAILABILITY x86

DESCRIPTION The mcis module provides low-level interface routines between the common disk/tape

I/O subsystem and the IBM MicroChannel bus master SCSI (Small Computer System

Interface) controllers. The mcis module can be conﬁgured for disk and streaming tape

support for one or more host adapter boards, each of which must be the sole initiator on

a SCSI bus. Auto conﬁ- guration code determines if the adapter is present at the

conﬁgured address and what types of devices are attached to it.

Board Conﬁguration

and Auto

Conﬁguration

The driver attempts to initialize itself in accordance with the information found in the

conﬁguration ﬁle, /kernel/drv/mcis.conf. The relevant user conﬁgurable items in this ﬁle

are:

io port ’reg=0x3540,0,0’ ’ioaddr=0x3540’,

hardware cache ’hwcache="on"’.

The ﬁrst host bus adapter is at address 0x3540. If there is a second or third adapter (up to

four are permitted on a PS/2 Model 95), uncomment the appropriate line(s) in the

conﬁguration ﬁle.

The hwcache property controls the cache on the host bus adapter. Enabling the cache can

increase ﬁle system performance.

Note that the IBM boot disk must be conﬁgured at target 6 lun 0.

FILES /kernel/drv/mcis.conf conﬁguration ﬁle for mcis.

7D-202 modiﬁed 18 Oct 1993