Reference Guide

Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide 108
Table 67 Parallel SCSI —
Disconnect / Reconnect MODE
SELECT Page — Field
Descriptions
Field Description
PS Parameters Savable. For
MODE SELECT, must be set to 0.
SPF SubPage Format. Always set to 0. Indicates that this page uses the page_0
page format.
Page Code Identifies the type of
MODE SELECT page being transferred. A value of 02h
identifies this as the Disconnect / Reconnect Page.
Page Length Indicates the number of bytes in the page, excluding bytes 0 and 1. The length
is returned in
MODE SENSE commands and must subsequently be set to the
same value when performing
MODE SELECT.
Buffer Full Ratio Must be set to 0.
Buffer Empty Ratio Must be set to 0.
Bus Inactivity Limit Must be set to 0.
Disconnect Time Limit Must be set to 0.
Connect Time Limit Must be set to 0.
Maximum Burst Size Indicates the maximum amount of data that will be transferred without
disconnecting, in units of 512 bytes. The default value is 80h for 64 KBytes. A
value of 0 indicates there is no limit to the amount of data that may be
transferred without disconnecting.
EMDP Enable Modify Data Pointers. Must be set to 0.
Fair Arbitration Must be set to 0.
DIMM Disconnect Immediate. Must be set to 0.
DTDC Data Transfer Disconnect Control. Must be set to 0.