A20 processor speed settings, A20 diskette write access – IBM 6648 User Manual
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Jumper
Setting
Description
CMOS Reset
2-3
CMOS Reset/Flash Recovery Mode
1-2 (D)
Normal Mode
Note:
The A20 CMOS clear/recovery jumper pins are numbered as follows:
v Pin 1 is the nearest to the battery.
v Pins 2 and 3 are below pin 1, as seen in the A20 System Board
layout.
A20 Processor Speed Settings
Processor speed for Type 6269 computers is fixed and are determined by the
processor. There are no settings required.
A20 Diskette Write Access
Diskette Write Enable and Write Protect options are changed in the Setup
Configuration. See “Setup Utility program” on page 122.
Chapter 3. Types 6058/6059/6269/6578/6579
147
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