SCSIStat

SCSIStat Get bit map of SCSI control and status bits

#include <SCSI.h> SCSI Manager

short SCSIStat( );

returns 2-byte bit map containing SCSI control and status

bits

SCSIStat returns a bit map of SCSI control and status bits; these bits are

given below. See the NCR 5380 SCSI chip documentation for a description of

these signals (Bits 0-9 are complements of the SCSI bus standard signals.)

Bit Signal ÍBit Signal

15 END DMA Ï7 RST

14 DMA REQ Ï6 BSY

13 PTY ERR Ï5 REQ

12 INT REQ Ï4 MSG

11 PHS MAT Ï3 C/D

10 BSY ERR Ï2 I/O

9 ATN Ï1 SEL

8 ACK Ï0 DBP

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

one of:

noErr (0) No error

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.