DEVICE DRIVERS
Downloading Files from the ECR
M
X
800 SERIES PROGRAMMERS GUIDE 119
Downloading
Files from the
ECR
IBM ECRs support downloading of the following files to terminals connected to it
via Tailgate /Feature C:
1 Program File named EFTLxxxx , xxxx represents the program version number.
2 Parameter File named EFTPyyyy, yyyy represents the parameter version
number.
The Program file and Parameter file are stored in the ECR. ECR supports only
ASCII files for download. “PCLANCNV” is used to convert the TXO application
program, data files, environment variables, and others into a compressed ASCII
file suitable for ECR download. This file is copied into the ECR following the
naming conventions of the ECR.
When the clerk signs on, ECR sends an ONLINE request to the terminal that
contains xxxx and yyyy version numbers. Based on these version numbers, the
Application decides whether to request a new download or not. If an Application is
not present, the OS always requests a new application download. Applications
can also request Parameter download at any time.
The following are the message formats:
ONLINE request
<STX>01.xxxxyyyy<ETX><LRC>
PROGRAM LOAD REQUEST
<STX>02.nnnnnnnn<ETX><LRC>
nnnnnnnn is the Terminal Serial Number
PROGRAM LOAD RESPONSE
<STX>02.nnnnnnnn<data ><ETX><LRC>
PARAMETER LOAD REQUEST/CONFIRMATION
<STX>59.<ETX><LRC>
PARAMETER LOAD RESPONSE
<STX>9XX<data ><ETX><LRC>
To Next Page
