Device Control Command Set
Request Resource List (RRL)
This subcommand is a request from the host application program for the printer
to identify resources currently allocated in the printer. The printer responds by
placing the requested information in the Special Data (SD) area of a subsequent
Acknowledge Reply.
This order causes the Resource List (see “Acknowledge Reply for Request
Resource List” on page 48) to be placed in the Special Data Area of the
Acknowledge Reply (see “Acknowledge Reply (ACK)” on page 29) requested
with this order. If the ARQ flag was not set for this XOA subcommand, it is
treated as a NOP.
A Resource List Reply may consist of multiple entries. If the Resource List
Reply contains an entry that does not fit in the space available in the Special
Data Area of Acknowledge Reply, 64XX follows either the acknowledge
continuation method or the RRL-continuation method, depending on the host.
Entry Length is calculated as follows:
Entry Length = 255 - (Device Header + IPDS Header + Acknowledge Reply)
Device Header = 6 Bytes (NDS); 0 Bytes (ARCTIC)
IPDS Header = 5 Bytes
Acknowledgement Reply = 19 Bytes
Table 25. XOA Request Resource List
Byte Value Description Error Code
0-1 X'F400' Request Resource List (RRL)
2 X'FF' Device defined Ordering X'0291..02'
3-4 X'0000'-X'FFFF' Entry Continuation Indicator
5 X'03'-X'xx' Entry Length X'0291..02'
6
X'01'
X'04'
X'05'
X'FF'
Resource Type
Single Byte Coded Fonts (Symbol Sets)
Page Segments
Overlays
All Resources
X'0291..02'
7
X'00'
Resource ID Format
Host-Assigned Resource ID
X'0291..02'
8-9 Resource Identifier
Notes:
1. The printer does not support multiple-entry queries. Byte 5 indicates the
length of the command.
2. If the entire resource list does not fit in the Special Data area of the
Acknowledge Reply, continuation is necessary which the printer indicates
using the acknowledgement continuation bit in the flag byte of the
Acknowledgment Reply. If the host requests Acknowledgement continuation
by sending a command with ARQ bit and the Continuation bit set, the printer
completes the RRL reply using Acknowledgement continuation. If the host
requests RRL continuation (by sending an RRL command with non-zero
value in bytes 3 and 4) the printer uses conventional RRL continuation to
finish the reply. If the host requests both RRL and ACK continuation, the
printer defaults to RRL continuation.
Chapter 3. IPDS Commands Reference 47
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