User's Manual Part 3

PERFORMING DOWNLOADS

Omni 3600 Download Differences

MNI 3600 REFERENCE MANUAL 63

The main application must always be stored in the Group 1 sub-partition. Related

programs or secondary applications can be stored in GIDs 2–14. GID15 is

available to all other groups.

The Main Application is Always Stored in GID1

The main application stored in GID1 is the controlling application for the terminal.

Any function call that invokes a related program or a secondary application stored

in GIDs 2–14 must be initiated by the GID1 application.

An application stored in a file group other than GID1 is limited in that it can only

access executables and files stored in its own file group and in GID15.

Physical and Logical Access to File Groups

The Omni 3600 operating system controls physical access to GIDs 1–15 using

password-protected system mode functions.

To download data into a specific file group, you must first enter system mode and

choose the target group by making the appropriate menu selections. Then, you

must enter the correct password for that file group.

Each file group has its own CONFIG.SYS file. The CONFIG.SYS settings of the

target group you select are always used as the system parameters for the

download operation you are performing.

The system of file groups also imposes some logical restrictions on which files can

download into which file groups:

• If GID1 is selected as the target group in system mode, you can download files

into GID1 and redirect files into any of the other file groups, as required, in the

same download operation.

• If another file group is selected as the target file group, you can download files

only into that group and redirect files only to GID15. For example, if you select

GID5 as the target group for the download, files can only download into GID5

and be redirected to GID15.

Use of RAM and

Flash Memory

The Omni 3600 application memory partition has two separate file systems:

• RAM (battery-backed volatile memory, also called SRAM), drive name I:

• Flash (non-volatile memory), drive name F:

The fact that there are two different file systems has the following important

implications for data transfer procedures:

• Depending on the requirements of a specific application, some files must

download into RAM and others into flash.

• There are also rules that restrict which types of files you can download and

store in which file system (RAM or flash).