SB-SYM-486C Motherboard Settings and Configuration

SEANIX TECHNOLOGY, INC.

SB-SYM-486C

Processor
80486SX/80486DX
Processor Speed
16/20/25/33/50MHz
Chip Set
Symphony
Max. Onboard DRAM
32MB
Cache
64/128/256KB
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
None
NPU Options
4167

CONNECTIONS
Purpose
Location
Purpose
Location
Power LED & keylock
J19
Turbo switch
J21 (pins 3 & 4)
Speaker
J20
Reset switch
J22
Turbo LED
J21 (pins 1 & 2)

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Monitor type select color
W2
pins 1 & 2 closed

Monitor type select monochrome
W2
pins 2 & 3 closed
»
Factory configured - do not alter
W3
Open

DRAM CONFIGURATION
Size
Bank 0
Bank 1
1MB
(4) 256K x 9
NONE
2MB
(4) 256K x 9
(4) 256K x 9
3MB
(4) 1M x 9
NONE
4MB
(4) 1M x 9
(4) 256K x 9
4MB
(4) 1M x 9
(4) 1M x 9
5MB
(4) 4M x 9
NONE
6MB
(4) 4M x 9
(4) 256K x 9
7MB
(4) 4M x 9
(4) 1M x 9
8MB
(4) 4M x 9
(4) 4M x 9

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
64KB
(4) 8K x 8
(4) 8K x 8
(1) 8K x 8
128KB
(4) 32K x 8
NONE
(1) 8K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
W4
W5
W6
W7
W8
64KB
2 & 3
Open
1 & 2
1 & 2
2 & 3
128KB
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
256KB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CON’T)
Size
W9
W15
W17
W19
W20
64KB
1 & 2
2 & 3
2 & 3
2 & 3
2 & 3
128KB
2 & 3
1 & 2
1 & 2
1 & 2
1 & 2
256KB
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CON’T)
Setting
W21
Cache installed (shows size at boot up)
pins 1 & 2 closed
Cache installed (does not show size at boot up)
pins 1 & 2 closed
Cache not installed
pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type
W13
W14
W18
80486SX
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed
80486DX
pins 1 & 2 closed
pins 1 & 2 closed
pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed
W1
W10
W11
W12
W16
16MHz
1 & 2
1 & 2
2 & 3
2 & 3
2 & 3
20MHz
1 & 2
1 & 2
2 & 3
2 & 3
2 & 3
25MHz
1 & 2
1 & 2
2 & 3
2 & 3
2 & 3
33MHz
1 & 2
1 & 2
2 & 3
2 & 3
2 & 3
50MHz
2 & 3
2 & 3
1 & 2
1 & 2
1 & 2
Note: Pins designated should be in the closed position.

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SB-SYM-486C Motherboard Settings and Configuration

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Processor	80486SX/80486DX
Processor Speed	16/20/25/33/50MHz
Chip Set	Symphony
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J19	Turbo switch	J21 (pins 3 & 4)
Speaker	J20	Reset switch	J22
Turbo LED	J21 (pins 1 & 2)

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	W2	pins 1 & 2 closed
	Monitor type select monochrome	W2	pins 2 & 3 closed
»	Factory configured - do not alter	W3	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
3MB	(4) 1M x 9	NONE
4MB	(4) 1M x 9	(4) 256K x 9
4MB	(4) 1M x 9	(4) 1M x 9
5MB	(4) 4M x 9	NONE
6MB	(4) 4M x 9	(4) 256K x 9
7MB	(4) 4M x 9	(4) 1M x 9
8MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	NONE	(1) 8K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	W4	W5	W6	W7	W8
64KB	2 & 3	Open	1 & 2	1 & 2	2 & 3
128KB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
256KB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CON’T)
Size	W9	W15	W17	W19	W20
64KB	1 & 2	2 & 3	2 & 3	2 & 3	2 & 3
128KB	2 & 3	1 & 2	1 & 2	1 & 2	1 & 2
256KB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CON’T)
Setting	W21
Cache installed (shows size at boot up)	pins 1 & 2 closed
Cache installed (does not show size at boot up)	pins 1 & 2 closed
Cache not installed	pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type	W13	W14	W18
80486SX	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed
80486DX	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed	W1	W10	W11	W12	W16
16MHz	1 & 2	1 & 2	2 & 3	2 & 3	2 & 3
20MHz	1 & 2	1 & 2	2 & 3	2 & 3	2 & 3
25MHz	1 & 2	1 & 2	2 & 3	2 & 3	2 & 3
33MHz	1 & 2	1 & 2	2 & 3	2 & 3	2 & 3
50MHz	2 & 3	2 & 3	1 & 2	1 & 2	1 & 2
Note: Pins designated should be in the closed position.