AT&T 3B2/300 Technical Reference Manual page 189

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CM195W SCSI HOST ADAPTER CARD
The CMl 95W Small Computer Systems Interface (SCSI) Host Adapter Card provides connection to
the industry standard SCSI bus. The SCSI bus is a 50 conductor bus that supports a wide variety of
mass storage peripheral devices. The CMl 95W Card provides an asynchronous, single-ended interface
to the SCSI bus with a peak transfer rate of 1.5 megabytes per second and with a maximum bus length
of 6 meters.
The CMl 95W Card is a single-width card measuring 6.5 inches wide by 7.4 inches deep.
Figure 2-56 shows the component layout of a typical CMl 95W SCSI Host Adapter Card. Connector
pinout information is provided in Appendix B. The major components of the CMl 95W Card are listed
below:
• An INTEL 80186 Microprocessor
• 128K bytes of Dynamic Random Access Memory (DRAM)
• 32K bytes of Read Only Memory (ROM)
• An NCR 5385£ SCSI Protocol Controller.
EQUIPMENT DESCRIPTION 2-165