Interpreters Document



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dps Interpreters

 
 
Typical Interpreter Line: 
Step 
Op-Code 
Action Fields
Goto Fields 
08 
31 
40 22 00 00 
71 09 73 09 FD 12 FF 99 00 00 
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Page
72 
34 Op-Code: Request the Control Module for Block Transfer - Mode 34 
 
Supported By: 
Class 2 Interpreter 1
 
 
Description: 
The 34 Op-Code will build a standard mode 34 message to send to a device. A mode 34 command will 
prepare the device to receive executable code via block transfer from the serial data link. Mode 34 messages 
are used in conjunction with mode 36 (Op-Codes B0, B3, and B4) to download information to devices. The 
mode 34 may not be required prior to sending a mode 36 - it is device dependent. 
Action Fields: 
AC0: Target Device ID 
AC1: Routine number to download
AC2: Exceptions: 
00 - Use address and length from the routine indicated by AC1 
01 - Use address and length from the utility file header 
02 - Send message without transfer type or length and address 
information. Ignores AC1 and AC3. 
AC3: Transfer type 
Pseudo Code: 
XX 34 AC0 AC1 AC2 AC3 G0-G1 G2-G3 G4-G5 G6-G7 G8-G9 
If AC2 is Not Equal to 02 
 
Set Transfer Type to value is AC3 
Else 
Exclude Transfer Type from Message 
Endif
If AC2=02 
Build Download Request as indicated in the table below: 
Request 
Byte
Value 
Byte Description 

6C 
Format and type

AC0 
Target device ID 

## 
Global source ID 

34 
Request download message mode

CS 
1 byte message checksum (handled by the system) 
Send Mode 34 message and receive response 
Goto Class 2 Response Processing
Goto Mode 34 Response Processing 
Else 
 
Find the routine indicated by value AC1
Build Download Request as indicated in the table below, contents of the XX locations is detailed in 

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