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 

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

38 
Start Routine by Address request service ID

XX 
High byte of address

XX 
Middle byte of address

XX 
Low byte of address





Routine 
Entry 
Options
to Pass 
Data from routine indicated by value in AC1. Number of bytes 
(N) is 1 to 251. For no routine entry options AC1 = 0, and N = 
0. 
9 + N 
CS
1 byte request checksum 
If AC0 is not equal to $00 
Find the routine indicated by the value in AC0 
Endif
If AC3 is $00 
Copy the routine address into request starting at byte 6 (or byte 7 for two byte addressing)
Else 
Copy the global address into request starting at byte 6 (or byte 7 for two byte addressing)
Endif
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Page
128 
(continued)
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 9 
Endif 
Calculate checksum and copy into service request byte ( 9 + N ) 
Send Start Routine by Address Request and receive response (up to 10 Bytes) 
Goto KWP2000 Response Processing
If Start Routine by Address positive response is received 
Look for Start Routine by Address positive response service ID ($78) in goto fields 
Else
Look for Start Routine by Address 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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