CT(4)

NAME
ct - WD33C93[ABC] based CBUS SCSI host adapter driver

SYNOPSIS
device ct
device scbus

In /boot/device.hints:

For most PC-9801-55, -92 and compatibles:
hint.ct.0.at="isa"

For ELECOM bus-master SCSI adapters:
hint.ct.0.at="isa"
hint.ct.0.flags="0x30000"

For I-O DATA SC98 adapters:
hint.ct.0.at="isa"
hint.ct.0.flags="0x10000"

For LOGITEC adapters:
hint.ct.0.at="isa"
hint.ct.0.flags="0x50000"

For TEXA adapters:
hint.ct.0.at="isa"
hint.ct.0.flags="0x20000"

For adapters with SMIT transfer mode to enable SMIT transfer:
hint.ct.0.at="isa"
hint.ct.0.flags="0x40000"
hint.ct.0.maddr="0xdc000"

Flags meaning:
0x00000
    DMA transfer mode for an NEC PC-9801-55, -92 (or compatibles), ICM IF-2660, Midori-Denshi MDC-554NA, or Logitec LHA-N151
0x10000
    DMA transfer mode for an I-O DATA SC-98II
0x20000
    bus-master transfer mode for a TEXA HA-55BS2, its successors, or Midori-Denshi MDC-926R
0x30000
    bus-master transfer mode for an ELECOM bus-master SCSI adapter
0x40000
    SMIT transfer mode (for supported adapters only)
0x50000
    bus-master transfer mode for a Logitec LHA-20x series, ICM IF-2766, IF-2766ET, IF-2767 or IF-2769

DESCRIPTION
The ct driver provides access to the SCSI bus connected to a WD33C93[ABC] based host adapter.

HARDWARE
The ct driver supports the following adapters:

•   ELECOM bus-master SCSI adapters
•   I-O DATA SC-98II
•   ICM IF-2660, IF-2766, IF-2766ET, IF-2767 and IF-2769
•   Logitec LHA-N151 and LHA-20x series
•   Midori-Denshi MDC-554NA and MDC-926R
•   NEC PC-9801-55, 92 and compatibles
•   SMIT transfer type SCSI host adapters
•   TEXA HA-55BS2 and its later models

SEE ALSO
cd(4), ch(4), ctau(4), da(4), intro(4), sa(4), scsi(4)

NOTES
Historically, the driver for the Cronyx Tau WAN adapters was “ct”. This device name was changed to “ctau” to avoid conflicts with this pc98 ct driver. The network device name for ctau(4) is “ct”. Please see ctau(4) for the details for that device.

HISTORY
The ct device driver has been developed for NetBSD/pc98 and ported for FreeBSD. It first appeared in FreeBSD 4.4.

AUTHORS
The ct driver was written by Naofumi HONDA.

This manual page was written by -nosplit Noriaki MITSUNAGA <non@FreeBSD.org> and Hideyuki KURASHINA <rushani@FreeBSD.org>.