B-5
PC-510 user’s manual
Software utilities
Remarks
The HIMEM driver can be used to allow ROM-DOS to run in High
Memory.
HIMEM supports a default of 32 handles.
HIMEM should not be used with older versions of VDISK. Current
versions of VDISK will use XMS memory if it is available.
HIMEM recognizes PS/2 style machines A20 line control. HIMEM
determines whether to use the PS/2 A20 control or the AT A20 control
method automatically by calling INT 15h, function C0h (get system
configuration).
The automatic detection can be overridden with the "/Machine:n" com-
mand line switch. Replacing "n" with 1 designates the PC AT A20
control method. Replacing "n" with 2 designates the PS/2 method.
Example 1
DEVICE=HIMEM.SYS
The above command installs the XMS device driver. Once this driver is
installed, accessing the HMA and Extended Memory (XMS) areas are
legal. The Extended Memory area can contain up to 2 Gigabytes of
memory. Typical systems have 4, 8, or 16 MB XMS memory installed.
Example 2
DEVICE=HIMEM.SYS /machine:1
This example forces the use of the AT style A20 line control.
The HIMEM driver will fail to load if either the machine does not have
memory above the 1 MB boundary or the BIOS does not provide support
for it. It will also fail to load if another XMS manager has been in-
stalled previously.
≡
I17HNDLR.EXE
Purpose
This support command allows the system to use the INT 17 functions
when the extended BIOS area is disabled (i.e., W2[9-10] is not jum-
pered) or when it is reprogrammed with another BIOS.
Содержание PC-510
Страница 2: ...O C T A G O N S Y S T E M S Embedded PCs For Extreme Environments PC 510 User s Manual 5171 0505 ...
Страница 7: ...Notice to user PC 510 user s manual ...
Страница 17: ...xii Contents PC 510 user s manual ...
Страница 23: ...About this manual PC 510 user s manual ...
Страница 25: ...Overview of Section 1 PC 510 user s manual ...
Страница 35: ...2 2 Quick start PC 510 user s manual Figure 2 1 PC 510 component diagram ...
Страница 36: ...2 3 PC 510 user s manual Quick start Figure 2 2 PC 510 center to center hole dimensions 331 2 858 ...
Страница 45: ...2 12 Quick start PC 510 user s manual ...
Страница 55: ...3 10 SETUP programs PC 510 user s manual ...
Страница 59: ...4 4 Save and run programs PC 510 user s manual ...
Страница 61: ...Overview of Section 2 PC 510 user s manual ...
Страница 73: ...5 12 Serial ports PC 510 user s manual ...
Страница 77: ...6 4 LPT1 parallel port PC 510 user s manual ...
Страница 83: ...7 6 Console devices PC 510 user s manual ...
Страница 119: ...13 8 CRTs and flat panels PC 510 user s manual ...
Страница 123: ...14 4 GPS interface PC 510 user s manual ...
Страница 125: ...15 2 PC 104 expansion PC 510 user s manual ...
Страница 127: ...Overview of Section 3 PC 510 user s manual ...
Страница 131: ...16 4 Watchdog timer and hardware reset PC 510 user s manual ...
Страница 147: ...18 8 Transferring files remote disks PC 510 user s manual ...
Страница 177: ...21 22 CPU power management PC 510 user s manual ...
Страница 181: ...22 4 Troubleshooting PC 510 user s manual ...
Страница 183: ...Overview of Section 4 PC 510 user s manual ...
Страница 203: ...A 20 Technical data PC 510 user s manual ...
Страница 231: ...B 28 Software utilities PC 510 user s manual ...