486DX2/50 SYSTEM BOARD Motherboard Settings and Configuration

MICRONICS COMPUTERS, INC.

486DX2/50 SYSTEM BOARD

Processor
80486DX2
Processor Speed
50(internal)MHz
Chip Set
Micronics
Max. Onboard DRAM
64MB (32MB on external memory board)
Cache
64/256KB
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
32-bit external memory card
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
J11
Turbo LED
W5
Speaker
J23
Reset switch
W6
Power LED & keylock
J24
Turbo switch
W7
External keyboard connector
W1
32-bit external memory card
SL1

USER CONFIGURABLE SETTINGS
Function
Switch
Position
»
Factory configured - do not alter
SW1/1
On
»
Factory configured - do not alter
SW1/2
Off
»
Factory configured - do not alter
SW1/3
Off
»
I/O delay enabled
SW1/4
Off

I/O delay disabled
SW1/4
On
»
Factory configured - do not alter
SW1/5
Off
»
Video BIOS cache enabled
SW1/6
Off

Video BIOS cache disabled
SW1/6
On
»
Factory configured - do not alter
SW1/7
Off
»
Factory configured - do not alter
SW1/8
Off
»
Factory configured - do not alter
SW2/6
On
»
Cache enabled
SW2/7
Off

Cache disabled
SW2/7
On
»
Cache enabled
SW2/8
Off

Cache disabled
SW2/8
On

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(4) 256K x 9
NONE
NONE
NONE
2MB
(4) 256K x 9
(4) 256K x 9
NONE
NONE
3MB
(4) 256K x 9
(4) 256K x 9
(4) 256K x 9
NONE
4MB
(4) 256K x 9
(4) 256K x 9
(4) 256K x 9
(4) 256K x 9
4MB
(4) 1M x 9
NONE
NONE
NONE
5MB
(4) 256K x 9
(4) 1M x 9
NONE
NONE
6MB
(4) 256K x 9
(4) 256K x 9
(4) 1M x 9
NONE
7MB
(4) 256K x 9
(4) 256K x 9
(4) 256K x 9
(4) 1M x 9
8MB
(4) 1M x 9
(4) 1M x 9
NONE
NONE
9MB
(4) 256K x 9
(4) 1M x 9
(4) 1M x 9
NONE
10MB
(4) 256K x 9
(4) 256K x 9
(4) 1M x 9
(4) 1M x 9
12MB
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
NONE
13MB
(4) 256K x 9
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
16MB
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
NONE
NONE
NONE
20MB
(4) 1M x 9
(4) 4M x 9
NONE
NONE
24MB
(4) 1M x 9
(4) 1M x 9
(4) 4M x 9
NONE
28MB
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
(4) 4M x 9
32MB
(4) 4M x 9
(4) 4M x 9
NONE
NONE
36MB
(4) 1M x 9
(4) 4M x 9
(4) 4M x 9
NONE
40MB
(4) 1M x 9
(4) 1M x 9
(4) 4M x 9
(4) 4M x 9
48MB
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
NONE
52MB
(4) 1M x 9
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
64MB
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
Note: Banks 2 & 3 are located on the external memory card.

DRAM SWITCH CONFIGURATION
Size
SW2/1
SW2/2
SW2/3
SW2/4
SW2/5
1MB
On
On
On
On
On
2MB
Off
On
On
On
On
3MB
On
Off
On
On
On
4MB
Off
Off
On
On
On
4MB
On
On
Off
On
On
5MB
On
On
Off
Off
On
6MB
On
Off
On
Off
On
7MB
Off
On
On
Off
On
8MB
Off
On
Off
On
On
9MB
On
Off
Off
Off
On
10MB
Off
Off
On
Off
On
12MB
On
Off
Off
On
Off
13MB
Off
Off
Off
Off
On
16MB
Off
Off
Off
On
On
16MB
On
On
Off
On
Off
20MB
On
On
Off
Off
Off
24MB
On
Off
On
Off
Off
28MB
Off
On
On
Off
Off
32MB
Off
On
Off
On
Off
36MB
On
Off
Off
Off
Off
40MB
Off
Off
On
Off
Off
48MB
On
Off
Off
On
Off
52MB
Off
Off
Off
Off
Off
64MB
Off
Off
Off
On
Off

CACHE CONFIGURATION
Size
Bank 0
Bank 1
64KB
(4) 8K x 8
(4) 8K x 8
256KB
(4) 32K x 8
(4) 32K x 8

CACHE JUMPER CONFIGURATION
Size
W3
W4
W15
64KB
Open
Open
pins 2 & 3 closed
256KB
Closed
Closed
pins 1 & 2 closed

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486DX2/50 SYSTEM BOARD Motherboard Settings and Configuration

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Processor	80486DX2
Processor Speed	50(internal)MHz
Chip Set	Micronics
Max. Onboard DRAM	64MB (32MB on external memory board)
Cache	64/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit external memory card
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J11	Turbo LED	W5
Speaker	J23	Reset switch	W6
Power LED & keylock	J24	Turbo switch	W7
External keyboard connector	W1	32-bit external memory card	SL1

USER CONFIGURABLE SETTINGS
Function		Switch	Position
»	Factory configured - do not alter	SW1/1	On
»	Factory configured - do not alter	SW1/2	Off
»	Factory configured - do not alter	SW1/3	Off
»	I/O delay enabled	SW1/4	Off
	I/O delay disabled	SW1/4	On
»	Factory configured - do not alter	SW1/5	Off
»	Video BIOS cache enabled	SW1/6	Off
	Video BIOS cache disabled	SW1/6	On
»	Factory configured - do not alter	SW1/7	Off
»	Factory configured - do not alter	SW1/8	Off
»	Factory configured - do not alter	SW2/6	On
»	Cache enabled	SW2/7	Off
	Cache disabled	SW2/7	On
»	Cache enabled	SW2/8	Off
	Cache disabled	SW2/8	On

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 256K x 9	NONE	NONE	NONE
2MB	(4) 256K x 9	(4) 256K x 9	NONE	NONE
3MB	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9	NONE
4MB	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE	NONE	NONE
5MB	(4) 256K x 9	(4) 1M x 9	NONE	NONE
6MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9	NONE
7MB	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9
8MB	(4) 1M x 9	(4) 1M x 9	NONE	NONE
9MB	(4) 256K x 9	(4) 1M x 9	(4) 1M x 9	NONE
10MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9	(4) 1M x 9
12MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	NONE
13MB	(4) 256K x 9	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9
16MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE	NONE	NONE
20MB	(4) 1M x 9	(4) 4M x 9	NONE	NONE
24MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	NONE
28MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9	NONE	NONE
36MB	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9	NONE
40MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9
48MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	NONE
52MB	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9
64MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9
Note: Banks 2 & 3 are located on the external memory card.

DRAM SWITCH CONFIGURATION
Size	SW2/1	SW2/2	SW2/3	SW2/4	SW2/5
1MB	On	On	On	On	On
2MB	Off	On	On	On	On
3MB	On	Off	On	On	On
4MB	Off	Off	On	On	On
4MB	On	On	Off	On	On
5MB	On	On	Off	Off	On
6MB	On	Off	On	Off	On
7MB	Off	On	On	Off	On
8MB	Off	On	Off	On	On
9MB	On	Off	Off	Off	On
10MB	Off	Off	On	Off	On
12MB	On	Off	Off	On	Off
13MB	Off	Off	Off	Off	On
16MB	Off	Off	Off	On	On
16MB	On	On	Off	On	Off
20MB	On	On	Off	Off	Off
24MB	On	Off	On	Off	Off
28MB	Off	On	On	Off	Off
32MB	Off	On	Off	On	Off
36MB	On	Off	Off	Off	Off
40MB	Off	Off	On	Off	Off
48MB	On	Off	Off	On	Off
52MB	Off	Off	Off	Off	Off
64MB	Off	Off	Off	On	Off

CACHE CONFIGURATION
Size	Bank 0	Bank 1
64KB	(4) 8K x 8	(4) 8K x 8
256KB	(4) 32K x 8	(4) 32K x 8

CACHE JUMPER CONFIGURATION
Size	W3	W4	W15
64KB	Open	Open	pins 2 & 3 closed
256KB	Closed	Closed	pins 1 & 2 closed