Compaq Portable II User Manual

Table 8-1. System Board Jumper Settings
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Jumper Jumper
Location Function Setting
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ED Video Display Pins 1-2 Third party monochrome monitor
Unit selection (MDA) installed
Pins 2-3 COMPAQ VDU, EGA, or RGBI installed
(default)
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ES Speed selection Pins 1-2 Primary or fast speed, 8 MHz
(default)
Pins 2-3 Secondary or common speed, 6 MHz
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EM Reserved DO NOT CHANGE SETTINGS
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MS1, MS2 System board MS1 = G disable memory and ROM
memory selection MS2 = G
MS1 = V 256 Kbyte memory installed
MS2=G
MS1 = G 512 Kbyte memory installed
MS2=V
MS1 = V 640 Kbyte memory installed (default)
MS2=V
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MS3 Memory Board MS3 = 1.0 1 Megabyte memory recognized
or V
512/1536 Kbyte MS3 = 1.5 1.5 Megabytes memory recognized
memory selection or G (default)
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Chapter 8.2 512/2048 KByte Memory Expansion Board Jumper Settings
The jumper settings on the 512/2048 Kbyte Memory Expansion Board correspond
to the amount of random access memory installed in the four banks on the
option board. There are four possible memory configurations that expand the
memory address range from 1.0 megabyte to 3.0 megabytes. Figure 8-3 shows
the component layout for the 512/2048 Kbyte Memory Expansion Board.

Compaq Portable II Specifications

General

Brand	Compaq
Model	Portable II
Category	Desktop
Language	English