IBM 6400 Programmer's Reference

Device Control Command Set
The following pages describe the device control command set commands in
detail.
Table 6 (Page 2 of 2). Device-Control Commands and Orders
Name Command Order Disposition
XOA Execute
Order Anystate
X'D633' See “Execute Order Any State
(XOA)” on page 46
XOA Discard
Buffered Data
X'F200' See “Discard Buffered Data
(DBD)” on page 46
XOA Request
Resource List
X'F400' See “Request Resource List
(RRL)” on page 47
XOA Exception
Handling Control
X'F600' See “Exception Handling Control
(EHC)” on page 48
XOA Print
Quality Control
X'F800' See “Print Quality Control
(PQC)” on page 49
XOH Execute
Order Homestate
X'D68F' See “Execute Order Home State
(XOH)” on page 50
XOH Print
Buffered Data
X'0100' See “Print Buffered Data (PBD)”
on page 50
XOH Erase
Residual Print
Data
X'0500' See “Erase Residual Print Data
(ERPD)” on page 50
XOH Set Media
Size
X'1700' See “XOH Set Media Size
(SMS)” on page 51
XOH Obtain
Printer
Characteristics
X'F300' See “Obtain Printer
Characteristics (OPC)” on
page 52
Acknowledge Reply (ACK)
Length D6FF Flag Correlation ID
(Optional)
DATA
The printer uses the Acknowledge Reply to return device status, sense
information, and any additionally requested information back to the host
application program.
The application program uses the Acknowledge data to maintain control of the
printing application and to begin error recovery actions when necessary.
The printer sends an acknowledgment:
•
When the Acknowledgement Required (ARQ) flag bit in the command the
printer receives is set to 1.
•
When the printer detects a command stream error or device error and must
send a negative response (NACK).
The Acknowledge Reply is returned to the host in the standard IPDS command
format although it goes from the printer to the host. A negative response has
priority over a positive response.
If the printer can identify the command and the command has a correlation ID,
the Acknowledge Reply contains a correlation ID that matches the command.
Chapter 3. IPDS Commands Reference 29

IBM 6400 Specifications

General

Brand	IBM
Model	6400
Category	Printer
Language	English