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Writing a SCSI host adapter driver

Writing a SCSI host adapter driver

The host adapter driver is a more complicated piece of software than the peripheral driver because it must be specific enough to use the features of the hardware for which it was intended, yet be generic enough to field as-yet-unwritten SCSI peripheral driver requests.

This chapter outlines the coding that is required for a SCSI host adapter. It should be read in conjunction with the sample source code provided in the SCO OpenServer 5 SCSI source code samples package available from the HDK homepage.


Sram
A simple SCSI host adapter RAM driver. This illustrates the basic characteristics of a UNIX host adapter driver without getting bogged down in the details required to access the hardware.

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