Texas Microsystems, Inc. 2003 - Changing Processor Clock Speed; Continuous Loop Diagnostics

continue. However~ operating inconsistencies can
result that may cause the computer to abort.
(Re£er to the BIOS Startup Routine and Error
Messages discussed previously in this section.)
Supported
£ixed disk con£igurations:
Type Cyls. Hds.
Size
(M Bytes)
1 306 4
10
2 615 4
20
3 615 6 30
4
940
8
60
5 940 6 45
6 615
4
20
(no precomp)
7
462
8
30
8 733 5 30
9 900 15 110
10
820 3
20
11 855 5
35
12
1024
5
40
13 306 8
20
14 1024 8
70
3.1.3 Changing Processor Clock Speed
The 2000 Series AT eon£iguration has a 80286 processor
and operates at clock speeds o£ 6 or 8 and 6 or 10 MHz.
The £ollowing two methods can be used to modi£y the
processor clock speed.
1. Use the Setup Utility (page 1) to modi£y the
power-up processor speed £ield.
2. Use a quick key method that can be used any time.
Press and hold the CTRL and ALT keys at the same
time, then type the desired speed:
6 = 6 MHz
8 = 8 MHz
1 = 10 MHz
3.1.4 Continuous Loop Diagnostics
The BIOS diagnostics can be executed in a continuous
loop program by simply changing one o£ the switch set-
tings on the CPU card. Continuous Loop Diagnostics are
used at the £actory to test all equipment be£ore
shipment. This procedure can also be used £or
con£idence testing i£ computer integrity is in
question. Re£er to the the B286 section o£ the MODULES
chapter on how to setup £or loop diagnostics.
Preliminary AT Users Manual
17
11/26/86