1227747 to 16197427 Conversion PCM Swap with Wiring Pinout Directions!

[In-Tech]

00004000 0000 FFFF FFFF EC11 0D01 E10C 93A5 0098 ................

L4000:  FDB $23AF   ; ID BYTE, 9135d
                    ;
L4002   FDB $FFFF   ; Platform ID  
L4004   FDB $FFFF   ; Platform ID   
                    ;
L4006   FDB $0000   ; CK SUM 
                    ;
L4008   FCB $0D     ; CK BYTE   Change to AA to disable checksum check

This is line 4000 in a hex editor, at 4008 is the mask id, the checksum is at 4006,7 and is calculated from 4008-FFFF