7 Steps to Operation
12
P5000HX(-M)-WMB Series Motherboard
Service Manual
Overview
After you check the jumper settings, check the switch block on the motherboard for
proper settings (
Figure 6
).
Switch Block
The switch block contains four (4) DIP switches that you can configure to affect the
following items:
•
On-board ROM access
•
CMOS RAM
•
Configuration Ports
Settings
Settings for the switches are provided in the following table:
Step 3: Check Switch Settings
SW1-1
Not Used
SW1-2
On-Board ROM Access
Open / Off
Flash memory enabled; Crisis Recovery mode disabled (default)
Closed / On
Flash memory disabled; Crisis Recovery mode enabled
SW1-3
CMOS RAM
Open / Off
Normal operation of CMOS RAM (default)
Closed / On
Factory default values for the Setup Utility are loaded into CMOS RAM
SW1-4
Configuration Ports
Open / Off
Configuration ports are mapped to I/O address 270/271 (default)
Closed / On
Configuration ports are mapped to I/O address 370/371
The system can operate without Memory Module Bank 0 (SIMM 1 and 2)
filled. However, Crisis Recovery mode requires Bank 0 to be populated. For
more information on Memory Modules, see
page 34
.
A Note on Crisis Recovery
Crisis Recovery mode causes the system to boot from the floppy drive and reflash the BIOS.
Note: Video is disabled on boot with Crisis Recovery mode enabled.
Before using Crisis Recovery mode, attempt the loading of factory BIOS default values by switching “On” SW1-3.
Use Crisis Recovery mode only if the system will not boot otherwise.
Texas Micro Inc. produces a utility to generate a Crisis Recovery Diskette. This diskette is to be used only with
Crisis Recovery mode enabled. To acquire the proper release BIOS for this product, contact Texas Micro
Technical Support. See
page v
. After downloading the proper release BIOS of the utility, follow the instructions
contained in the file README.TXT to generate the diskette. The Crisis Recovery Diskette must be generated on
a system that is operating MS-DOS
®
, Windows
®
95, Windows 98, Windows NT
®
, or OS/2.
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