D-2
DOS Considerations
For DOS installations, the difference in Upper Memory Blocks may
affect how an application loads and operates. If more UMB space is
required (and a USB keyboard is not configured), the Legacy USB
support should be disabled. In order to get maximum UMB usage, the
EMM386.EXE driver should be loaded in the CONFIG.SYS file with the
following recommended inclusions and exclusions.
Note:
These settings should be validated for the desired workstation
configuration and BIOS revision before the system is released.
This EMM386.EXE parameter information assumes you have all ROMs
disabled in the BIOS Setup, including the Legacy USB. PXE or SLP may
be enabled for loading as long as you are not using them during run
time. Any memory used by added adapter cards should also be
accounted for with the appropriate exclude parameters. The examples
below assume there are no added adapter cards.
The latest BIOS has a starting address for the PC BIOS at E911:0. This
address gets lower and lower in the
E000
page as new features or
corrections are added to the BIOS. With the current BIOS, an Include of
I=DD00-E8FF
can be used, but doing this risks that a future PC BIOS
may become large enough to move into this included area. It is
suggested that
E3FF
be used as a conservative setting if the memory
requirements permit it. The smallest amount from the
E000
page
should be taken, which leaves as much room as possible for the BIOS to
grow.
Non-TAPS DOS Environment
For the non-TAPS DOS environment, use EMM386.EXE with the
following Include and eXclude parameters to get 144 KB of usable
memory:
DEVICE= EMM386.EXE NOEMS I=B000-B7FF X=C000-CBFF
↵
I=CC00-E7FF
Summary of Contents for RealPOS 80c
Page 1: ...NCR RealPOS 80c Release 1 1 Hardware User s Guide B005 0000 1359 Issue C...
Page 17: ...xv...
Page 18: ......
Page 55: ...Chapter 1 Product Overview 1 37...
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Page 80: ...2 24 Chapter 2 Hardware Installation...
Page 108: ......
Page 118: ...5 10 Chapter 5 BIOS Updating Procedures...
Page 133: ...Chapter 6 Memory Dump 6 15...
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Page 162: ...D 4...