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This chapter discusses the requirements for writing native driver code to support SCSI devices on PCI cards in PCI-based Power Macintosh computers.
Macintosh SCSI devices are now supported by SCSI Manager 4.3, an enhanced version of the original Macintosh SCSI Manager. The new capabilities of SCSI Manager 4.3 include
The hardware-independence features of SCSI Manager 4.3 mean that the equivalent of SCSI driver code is now a software entity called a SCSI Interface Module (SIM). This chapter discusses some of the requirements for writing and loading SIMs in PCI-based Power Macintosh computers.
Inside Macintosh: Devices, described in Apple Publications, contains a full discussion of SCSI Manager 4.3. You should read the material in Inside Macintosh first. This chapter covers only the changes from that information for SCSI devices based on PCI cards.