486LC1 Motherboard Settings and Configuration

SEANIX TECHNOLOGY, INC.

486LC1

Processor
80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed
20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set
Contaq
Max. Onboard DRAM
32MB
Cache
64/128/256KB
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
None
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Turbo LED
P1
Power LED & keylock
P4
Turbo switch
P2
Reset switch
P5
Speaker
P3
External battery
P7

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Monitor type select color
JP22
Closed

Monitor type select monochrome
JP22
Open
»
CMOS memory normal operation
JP23
pins 1 & 2 closed

CMOS memory clear
JP23
pins 2 & 3 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
1MB
(4) 256K x 9
NONE
2MB
(4) 256K x 9
(4) 256K x 9
4MB
(4) 1M x 9
NONE
5MB
(4) 1M x 9
(4) 256K x 9
8MB
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
NONE
17MB
(4) 4M x 9
(4) 256K x 9
20MB
(4) 4M x 9
(4) 1M x 9
32MB
(4) 4M x 9
(4) 4M x 9

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
DIRTY (U1)
64KB
(4) 8K x 8
(4) 8K x 8
(1) 8K x 8
(1) 8K x 8
128KB
(4) 32K x 8
NONE
(1) 8K x 8
(1) 8K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
JP13
JP14
JP15
JP16
JP19
JP20
64KB
Open
Open
Open
Open
2 & 3
Open
128KB
Closed
Open
Closed
Open
1 & 2
2 & 3
256KB
Closed
Closed
Closed
Closed
2 & 3
1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type
JP1
JP2
JP3
JP4
JP5
JP6
JP7
80386DX
Open
Open
Open
Open
Open
Open
Open
CX486DLC
Closed
Closed
Closed
Open
Open
Open
Open
80486SX
Open
Open
Open
Open
Open
2 & 3
1 & 2
80487SX
Open
Open
Open
Closed
Closed
2 & 3
1 & 2
80486DX
Open
Open
Open
Open
Closed
2 & 3
2 & 3
80486DX2
Open
Open
Open
Open
Closed
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type
JP8
JP9
JP10
JP17
JP18
JP21
JP24
80386DX
Closed
Open
Open
2 & 3
2 & 3
2 & 3
1 & 2
CX486DLC
Closed
Open
Open
2 & 3
2 & 3
2 & 3
N/A
80486SX
Open
1 & 2
Closed
1 & 2
1 & 2
1 & 2
2 & 3
80487SX
Open
1 & 2
Closed
1 & 2
1 & 2
1 & 2
2 & 3
80486DX
Open
1 & 2
Closed
1 & 2
1 & 2
1 & 2
2 & 3
80486DX2
Open
1 & 2
Closed
1 & 2
1 & 2
1 & 2
2 & 3
Note: Pins designated should be in the closed position. JP24 may not be present on all boards. The location is unidentified.

80386 ATCLK CONFIGURATION
ATCLK
JP11
JP12
4
Closed
Closed
6
Closed
Open
8
Open
Closed
10
Open
Open

80486 ATCLK CONFIGURATION
ATCLK
JP11
JP12
3
Closed
Open
4
Open
Closed
5
Open
Open
6
Closed
Closed

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Processor	80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed	20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set	Contaq
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo LED	P1	Power LED & keylock	P4
Turbo switch	P2	Reset switch	P5
Speaker	P3	External battery	P7

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP22	Closed
	Monitor type select monochrome	JP22	Open
»	CMOS memory normal operation	JP23	pins 1 & 2 closed
	CMOS memory clear	JP23	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
5MB	(4) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
17MB	(4) 4M x 9	(4) 256K x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG	DIRTY (U1)
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	NONE	(1) 8K x 8	(1) 8K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP13	JP14	JP15	JP16	JP19	JP20
64KB	Open	Open	Open	Open	2 & 3	Open
128KB	Closed	Open	Closed	Open	1 & 2	2 & 3
256KB	Closed	Closed	Closed	Closed	2 & 3	1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP1	JP2	JP3	JP4	JP5	JP6	JP7
80386DX	Open	Open	Open	Open	Open	Open	Open
CX486DLC	Closed	Closed	Closed	Open	Open	Open	Open
80486SX	Open	Open	Open	Open	Open	2 & 3	1 & 2
80487SX	Open	Open	Open	Closed	Closed	2 & 3	1 & 2
80486DX	Open	Open	Open	Open	Closed	2 & 3	2 & 3
80486DX2	Open	Open	Open	Open	Closed	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP8	JP9	JP10	JP17	JP18	JP21	JP24
80386DX	Closed	Open	Open	2 & 3	2 & 3	2 & 3	1 & 2
CX486DLC	Closed	Open	Open	2 & 3	2 & 3	2 & 3	N/A
80486SX	Open	1 & 2	Closed	1 & 2	1 & 2	1 & 2	2 & 3
80487SX	Open	1 & 2	Closed	1 & 2	1 & 2	1 & 2	2 & 3
80486DX	Open	1 & 2	Closed	1 & 2	1 & 2	1 & 2	2 & 3
80486DX2	Open	1 & 2	Closed	1 & 2	1 & 2	1 & 2	2 & 3
Note: Pins designated should be in the closed position. JP24 may not be present on all boards. The location is unidentified.

80386 ATCLK CONFIGURATION
ATCLK	JP11	JP12
4	Closed	Closed
6	Closed	Open
8	Open	Closed
10	Open	Open

80486 ATCLK CONFIGURATION
ATCLK	JP11	JP12
3	Closed	Open
4	Open	Closed
5	Open	Open
6	Closed	Closed