Inside Macintosh: Devices /

Chapter 3 - SCSI Manager / SCSI Manager Reference

SCSI Manager TIB Instructions /

scComp

You can use the scComp TIB instruction to compare data on a SCSI device with data in memory.

-->	scParam1	Ptr	A pointer to a data buffer.
-->	scParam2	LongInt	The number of bytes to be compared.

DESCRIPTION

The scComp TIB instruction is used in conjunction with the SCSIRead function to compare data in memory with incoming data from a SCSI device. The SCSI Manager compares the result of the read command with the contents of the data buffer pointed to by scParam1. The scParam2 parameter specifies the number of bytes to read and compare. If all bytes do not compare, the SCSIRead function returns the result code scCompareErr.

SCSI Manager 4.3 Note

You should avoid using the scComp TIB instruction because it is not supported by SCSI Manager 4.3.