Interpreters Document



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dps Interpreters

Request 
Byte 
Value 
Byte Description 

80 
Format byte for physical addressing 

## 
Global target byte 

## 
Global source byte 

2 + N 
Length of request from byte 5 up to checksum (not included) 

31 
Start routine by local ID request service ID

AC0 
Routine local ID for routine to begin executing 





Routine 
Entry 
Options
to Pass 
Data from routine indicated by value in AC1. Number of bytes 
(N) is 1 to 253. For no Routine Entry Options AC1 = 0, and N 
= 0. 
7 + N 
CS 
1 byte message checksum 
If AC1 is not $00 
Find routine indicated by value in AC1 to include in request as Routine Entry Options 
Copy entire Data Routine into request starting at byte 7 
Endif 
Calculate checksum and copy into service request (byte 7 + N) 
Send Start Routine by Local ID Request and receive response (up to 10 Bytes) 
Goto KWP2000 Response Processing
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Page
137 
(continued)
If Start Routine by Local ID positive response is received 
Copy first byte of positive response data to high byte of storage location identified by AC2 
Copy second byte of positive response data to low byte of storage location identified by AC2 
Look for Start Routine by Local ID positive response service ID ($71) in goto fields 
Else
Look for Start Routine by Local ID negative response, response code in goto fields 
Endif
If found
Goto appropriate step
Else 
Goto step indicated by FF goto field 
Endif 

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