PERSONAL COMPUTER PC-8 Motherboard Settings and Configuration

NCR CORPORATION

PERSONAL COMPUTER PC-8

Processor
80286 (exact location unidentified)
Processor Speed
Unidentified
Chip Set
Unidentified
Max. Onboard DRAM
14MB (640KB on mainboard)
Cache
None
BIOS
Unidentified
Dimensions
538mm x 420mm
I/O Options
None
NPU Options
80287 (exact location unidentified)

CONNECTIONS
Purpose
Location
External battery
P21

USER CONFIGURABLE SETTINGS
Function
Switch
Position

Monitor type select monochrome
SW1
On

Monitor type select color
SW1
Off
»
Factory configured - do not alter
U101
N/A

DRAM CONFIGURATION
Note: The location, orientation and chips sizes are unidentified.

DRAM JUMPER CONFIGURATION
Size
P17
P18
256KB
Pins 1 & 2 closed
Pins 1 & 2 closed
512KB
Pins 1 & 2 closed
Pins 2 & 3 closed
640KB
Pins 2 & 3 closed
Pins 2 & 3 closed

DRAM CONFIGURATION
Note: The orientation and chips sizes are unidentified.

DRAM SWITCH CONFIGURATION
Size
S1/1
S1/2
S1/3
S1/4
S1/5
S2/1
S2/2
S2/3
S2/4
S2/5
None
On
On
On
Off
On
On
On
On
Off
Off
512KB
On
On
On
Off
Off
On
On
Off
On
On
1MB
On
On
Off
On
On
On
On
Off
On
Off
1.5MB
On
On
Off
On
Off
On
On
Off
Off
On
2MB
On
On
Off
Off
On
On
On
Off
Off
Off
2.5MB
On
On
Off
Off
Off
On
Off
On
On
On
3MB
On
Off
On
On
On
On
Off
On
On
Off
3.5MB
On
Off
On
On
Off
On
Off
On
Off
On
4MB
On
Off
On
Off
On
On
Off
On
Off
Off
4.5MB
On
Off
On
Off
Off
On
Off
Off
On
On
5MB
On
Off
Off
On
On
On
Off
Off
On
Off

DRAM SWITCH CONFIGURATION (CON’T)
Size
S1/1
S1/2
S1/3
S1/4
S1/5
S2/1
S2/2
S2/3
S2/4
S2/5
5.5MB
On
Off
Off
On
Off
On
Off
Off
Off
On
6MB
On
Off
Off
Off
On
On
Off
Off
Off
Off
6.5MB
On
Off
Off
Off
Off
Off
On
On
On
On
7MB
Off
On
On
On
On
Off
On
On
On
Off
7.5MB
Off
On
On
On
Off
Off
On
On
Off
On
8MB
Off
On
On
Off
On
Off
On
On
Off
Off
8.5MB
Off
On
On
Off
Off
Off
On
Off
On
On
9MB
Off
On
Off
On
On
Off
On
Off
On
Off
9.5MB
Off
On
Off
On
Off
Off
On
Off
Off
On
10MB
Off
On
Off
Off
On
Off
On
Off
Off
Off
10.5MB
Off
On
Off
Off
Off
Off
Off
On
On
On
11MB
Off
Off
On
On
On
Off
Off
On
On
Off
11.5MB
Off
Off
On
On
Off
Off
Off
On
Off
On
12MB
Off
Off
On
Off
On
Off
Off
On
Off
Off
12.5MB
Off
Off
On
Off
Off
Off
Off
Off
On
On
13MB
Off
Off
Off
On
On
Off
Off
Off
On
Off
13.5MB
Off
Off
Off
On
Off
Off
Off
Off
Off
On
14MB
Off
Off
Off
Off
On
N/A
N/A
N/A
N/A
N/A

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PERSONAL COMPUTER PC-8 Motherboard Settings and Configuration

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Processor	80286 (exact location unidentified)
Processor Speed	Unidentified
Chip Set	Unidentified
Max. Onboard DRAM	14MB (640KB on mainboard)
Cache	None
BIOS	Unidentified
Dimensions	538mm x 420mm
I/O Options	None
NPU Options	80287 (exact location unidentified)

USER CONFIGURABLE SETTINGS
Function		Switch	Position
	Monitor type select monochrome	SW1	On
	Monitor type select color	SW1	Off
»	Factory configured - do not alter	U101	N/A

DRAM JUMPER CONFIGURATION
Size	P17	P18
256KB	Pins 1 & 2 closed	Pins 1 & 2 closed
512KB	Pins 1 & 2 closed	Pins 2 & 3 closed
640KB	Pins 2 & 3 closed	Pins 2 & 3 closed

DRAM SWITCH CONFIGURATION
Size	S1/1	S1/2	S1/3	S1/4	S1/5	S2/1	S2/2	S2/3	S2/4	S2/5
None	On	On	On	Off	On	On	On	On	Off	Off
512KB	On	On	On	Off	Off	On	On	Off	On	On
1MB	On	On	Off	On	On	On	On	Off	On	Off
1.5MB	On	On	Off	On	Off	On	On	Off	Off	On
2MB	On	On	Off	Off	On	On	On	Off	Off	Off
2.5MB	On	On	Off	Off	Off	On	Off	On	On	On
3MB	On	Off	On	On	On	On	Off	On	On	Off
3.5MB	On	Off	On	On	Off	On	Off	On	Off	On
4MB	On	Off	On	Off	On	On	Off	On	Off	Off
4.5MB	On	Off	On	Off	Off	On	Off	Off	On	On
5MB	On	Off	Off	On	On	On	Off	Off	On	Off

DRAM SWITCH CONFIGURATION (CON’T)
Size	S1/1	S1/2	S1/3	S1/4	S1/5	S2/1	S2/2	S2/3	S2/4	S2/5
5.5MB	On	Off	Off	On	Off	On	Off	Off	Off	On
6MB	On	Off	Off	Off	On	On	Off	Off	Off	Off
6.5MB	On	Off	Off	Off	Off	Off	On	On	On	On
7MB	Off	On	On	On	On	Off	On	On	On	Off
7.5MB	Off	On	On	On	Off	Off	On	On	Off	On
8MB	Off	On	On	Off	On	Off	On	On	Off	Off
8.5MB	Off	On	On	Off	Off	Off	On	Off	On	On
9MB	Off	On	Off	On	On	Off	On	Off	On	Off
9.5MB	Off	On	Off	On	Off	Off	On	Off	Off	On
10MB	Off	On	Off	Off	On	Off	On	Off	Off	Off
10.5MB	Off	On	Off	Off	Off	Off	Off	On	On	On
11MB	Off	Off	On	On	On	Off	Off	On	On	Off
11.5MB	Off	Off	On	On	Off	Off	Off	On	Off	On
12MB	Off	Off	On	Off	On	Off	Off	On	Off	Off
12.5MB	Off	Off	On	Off	Off	Off	Off	Off	On	On
13MB	Off	Off	Off	On	On	Off	Off	Off	On	Off
13.5MB	Off	Off	Off	On	Off	Off	Off	Off	Off	On
14MB	Off	Off	Off	Off	On	N/A	N/A	N/A	N/A	N/A