Symbol PDT 3400 Series, Руководство по продукции

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Terminal Configuration: Edit the Configuration Files
VG230EMS.SYS
The VG230EMS.SYS driver is an Expanded Memory Manager (EMM) that conforms to the
Lotus/Intel/Microsoft (LIM) version 4.0 Expanded Memory Specification (EMS). The driver
provides an interface for applications to access Expanded Memory. Currently, the Symbol-
provided RAM Disk driver, RDISK21T, is the only application which uses Expanded
Memory on the PDT 3400.
To load the EMS driver, add the following line to CONFIG.SYS:
DEVICE=VG230EMS.SYS /t:off /f:D0-DC
Note: The /t:off option specifies that the EMS driver perform a non-
destructive test of memory. This option must be used if RAM Disk
contents are to be preserved across a warm reboot.
The /f:D0-DC option specifies the page frame to use to map in the
EMS memory. Under normal circumstances, this option should not be
changed.
EMSALLOC.SYS
The EMSALLOC.SYS driver is an optional utility that allows for adjusting the boundary
between the end of the DOS Transient Program Area (TPA) and the beginning of memory
used as Expanded Memory. The driver allows a minimum of 256K and a maximum of 640K
to be allocated as DOS TPA memory.
To load the EMSALLOC.SYS driver, add the following line to CONFIG.SYS:
DEVICE=EMSALLOC.SYS xxx
where xxx is the amount of memory in KB to allocate as EMS memory. The driver fails to
load if the amount allocated as EMS memory leaves less than 256K for DOS TPA memory.
Additionally, as the maximum amount of memory that DOS can directly use is 640K, any
requests that would leave more than 640K for DOS are adjusted to leave 640K for DOS and
allocate all additional memory as EMS memory.
Note: If used, the EMSALLOC.SYS driver MUST be loaded prior to the
VG230EMS.SYS driver.