SCSIWBlind

SCSIWBlind Transfer data without polling and waiting for /REQ line

#include <SCSI.h> SCSI Manager

Ptr tibPtr; pointer to a transfer instruction block

returns 16-bit Error Code; 0=no error

SCSIWBlind transfers data from the initiator to the target, as specified by

the transfer instructions block pointed to by tibPtr. SCSIWBlind is

functionally identical to SCSIWrite, but does not poll and wait for the /REQ

line on each data byte. As with SCSIRBlind, SCSIWBlind polls the /REQ

line only for the first byte transferred by each scInc, scNoInc, or scComp

instruction.

Returns: an error code indicating success or failure of the function. It will be

one of:

noErr (0) No error

scBadParmsErr (4) Unrecognized instruction in transfer instruction block

scCommErr (2) Breakdown in SCSI protocols

scPhaseErr (5) Phase error

Notes: The error codes returned by SCSI Manager routines typically indicate

only that a given operation has failed. To determine the actual cause of the

failure, another SCSI command needs to be sent asking the device what went

wrong.

A transfer instructions block tells the SCSI Manager what to do

with the data bytes transferred during the data phase. A transfer instruction

block contains a pseudo-program consisting of a variable number of

instructions; it's similar to a subroutine except that the instructions are

provided and interpreted by the SCSI Manager itself. The instructions are

of a fixed size and are of type SCSIInstr. See SCSIInstr for more

information on the the instructions that are available.

Use SCSISelect to specify the target device.

Referenced by (4):