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B
Programming Applications
The M90 provides a utility for putting application programs into the sys-
tem Read-Only Memory (ROM) area. Once in the ROM, the programs
become user-resident applications in the M90 system. The advantage of
the user-resident application is that they do not have to download from a
host computer through M90 RS-232 port and cannot delete accidentally.
It can also save the Random Access Memory (RAM) space for the system.
Up to eight user-resident applications can be in the M90, with the total
file size less than or equal to 128 KB.
The M90 system EXEC job scheduler supports the user-resident applica-
tion. The ROM resident user applications must be of *.EXE type. The
system does not allow data files. EXEC searches user-resident applications
first when a RUN command executes. If there is an AUTOEXEC.EXE
user-resident application, it runs after power-on when the M90 is in Ready
Mode.
To add a program to the ROM disk, download the program to the RAM
disk as described later in this appendix, then start the M90 in the Supervi-
sor Mode. Select System > Programming > Add Program. Adding a pro-
gram is fully described on page 38.
Note: As this requires reprogramming of the FLASH in the M90, make
sure that either the M90 battery is fully charged or that the M90 is on
charge (office dock). A power failure during flash programming could
corrupt the FLASH. If this occurs, you must have the M90 FLASH
EEPROM replaced at a service center.
M90 Series Portable Data Entry Unit Reference Manual
81
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