80486 (VER. 2) Motherboard Settings and Configuration

FIRST INTERNATIONAL COMPUTER, INC.

80486 (VER. 2)

Processor
CX486M6/80486SX/AM486DXLT/CX486M7/UMC U5/80486DX/ 80486DX2/80486DX4/SL80486DX4/P24D/P24T
Processor Speed
25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Chip Set
C & T
Video Chip Set
None
Maximum Onboard Memory
64MB
Maximum Video Memory
None
Cache
64/128/256/512/1024KB
BIOS
AMI
Dimensions
254mm x 218mm
I/O Options
32-bit VESA local bus slots (3), green PC connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
JP1
Reset switch
JP20
Power LED & keylock
JP15
Turbo switch
JP22
Speaker
JP18
Green PC connector
JP23
Turbo LED
JP19
32-bit VESA local bus slots
SL1 - SL3

USER CONFIGURABLE SETTINGS
Function
Label
Position

Battery type select internal
JP1
Pins 2 & 3 closed

Battery type select external
JP1
Closed

CMOS memory clear
JP1
Pins 3 & 4 closed
»
Factory configured - do not alter
JP2
Open

Flash BIOS voltage select 12v
JP3
Pins 2 & 3 closed

Flash BIOS voltage select 5v
JP3
Pins 1 & 2 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
1MB
(1) 256K x 36
None
None
1MB
None
(1) 256K x 36
None
2MB
(1) 256K x 36
(1) 256K x 36
None
2MB
None
(1) 256K x 36
(4) 256K x 9
3MB
(1) 256K x 36
(1) 256K x 36
(4) 256K x 9
4MB
(1) 1M x 36
None
None
4MB
None
(1) 1M x 36
None
5MB
(1) 1M x 36
(1) 256K x 36
None
5MB
(1) 256K x 36
(1) 1M x 36
None
5MB
None
(1) 1M x 36
(4) 256K x 9
6MB
(1) 256K x 36
(1) 256K x 36
(1) 1M x 9
6MB
(1) 256K x 36
(1) 1M x 36
(4) 256K x 9
6MB
(1) 1M x 36
(1) 256K x 36
(4) 256K x 9
8MB
(1) 2M x 36
None
None
8MB
(1) 1M x 36
(1) 1M x 36
None
8MB
None
(1) 2M x 36
None
9MB
(1) 2M x 36
(1) 256K x 36
None
9MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 9
9MB
(1) 1M x 36
(1) 256K x 36
(1) 1M x 9
9MB
None
(1) 2M x 36
(4) 256K x 9
9MB
(1) 1M x 36
(1) 1M x 36
(4) 256K x 9
10MB
(1) 256K x 36
(1) 2M x 36
(4) 256K x 9
12MB
(1) 2M x 36
(1) 1M x 36
None
12MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 9
13MB
(1) 256K x 36
(1) 2M x 36
(1) 1M x 9
13MB
(1) 1M x 36
(1) 2M x 36
(4) 256K x 9
16MB
(1) 4M x 36
None
None
16MB
None
(1) 4M x 36
None
16MB
(1) 1M x 36
(1) 2M x 36
(1) 1M x 9
17MB
(1) 4M x 36
(1) 256K x 36
None
17MB
(1) 256K x 36
(1) 4M x 36
None
17MB
None
(1) 256K x 36
(1) 4M x 9

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
17MB
(1) 256K x 36
None
(1) 4M x 9
17MB
None
(1) 4M x 36
(4) 256K x 9
18MB
(1) 256K x 36
(1) 256K x 36
(1) 4M x 9
18MB
(1) 256K x 36
(1) 4M x 36
(4) 256K x 9
18MB
(1) 4M x 36
(1) 256K x 36
(4) 256K x 9
20MB
(1) 4M x 36
(1) 1M x 36
None
20MB
(1) 1M x 36
(1) 4M x 36
None
20MB
None
(1) 1M x 36
(1) 4M x 9
21MB
(1) 256K x 36
(1) 1M x 36
(1) 4M x 9
21MB
(1) 1M x 36
(1) 256K x 36
(1) 4M x 9
21MB
(1) 256K x 36
(1) 4M x 36
(1) 1M x 9
21MB
(1) 4M x 36
(1) 256K x 36
(1) 1M x 9
21MB
(1) 1M x 36
(1) 4M x 36
(4) 256K x 9
21MB
(1) 4M x 36
(1) 1M x 36
(4) 256K x 9
24MB
(1) 2M x 36
(1) 4M x 36
None
24MB
None
(1) 2M x 36
(1) 4M x 9
24MB
(1) 1M x 36
(1) 1M x 36
(1) 4M x 9
24MB
(1) 1M x 36
(1) 4M x 36
(1) 1M x 9
24MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 9
25MB
(1) 256K x 36
(1) 2M x 36
(1) 4M x 9
25MB
(1) 4M x 36
(1) 2M x 36
(4) 256K x 9
28MB
(1) 4M x 36
(1) 2M x 36
(1) 1M x 9
32MB
(1) 8M x 36
None
None
32MB
(1) 4M x 36
(1) 4M x 36
None
32MB
None
(1) 8M x 36
None
32MB
None
(1) 4M x 36
(1) 4M x 9
33MB
(1) 8M x 36
(1) 256K x 36
None
33MB
(1) 256K x 36
(1) 8M x 36
None
33MB
(1) 256K x 36
(1) 4M x 36
(1) 4M x 9
33MB
(1) 4M x 36
(1) 256K x 36
(1) 4M x 9
33MB
None
(1) 8M x 36
(4) 256K x 9
33MB
(1) 4M x 36
(1) 4M x 36
(4) 256K x 9
34MB
(1) 256K x 36
(1) 8M x 36
(4) 256K x 9
36MB
(1) 8M x 36
(1) 1M x 36
None
36MB
(1) 1M x 36
(1) 8M x 36
None
36MB
(1) 1M x 36
(1) 4M x 36
(1) 4M x 9
36MB
(1) 4M x 36
(1) 1M x 36
(1) 4M x 9
36MB
(1) 4M x 36
(1) 4M x 36
(1) 1M x 9
37MB
(1) 256K x 36
(1) 8M x 36
(1) 1M x 9
37MB
(1) 1M x 36
(1) 8M x 36
(4) 256K x 9
40MB
(1) 2M x 36
(1) 8M x 36
None

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
40MB
(1) 4M x 36
(1) 2M x 36
(1) 4M x 9
40MB
(1) 1M x 36
(1) 8M x 36
(1) 1M x 9
48MB
(1) 4M x 36
(1) 8M x 36
None
48MB
(1) 8M x 36
(1) 4M x 36
None
48MB
None
(1) 8M x 36
(1) 4M x 9
48MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 9
49MB
(1) 256K x 36
(1) 8M x 36
(1) 4M x 9
49MB
(1) 4M x 36
(1) 8M x 36
(4) 256K x 9
52MB
(1) 1M x 36
(1) 8M x 36
(1) 4M x 9
52MB
(1) 4M x 36
(1) 8M x 36
(1) 1M x 9
64MB
(1) 8M x 36
(1) 8M x 36
None
64MB
(1) 4M x 36
(1) 8M x 36
(1) 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 (A)
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8
256KB (B)
(4) 64K x 8
None
(1) 32K x 8
512KB (A)
(4) 64K x 8
(4) 64K x 8
(1) 32K x 8
512KB (B)
(4) 128K x 8
None
(1) 32K x 8
1MB
(4) 128K x 8
(4) 128K x 8
(1) 64K x 8

CACHE JUMPER CONFIGURATION
Size
JP5
JP10
JP11
JP12
JP13
JP14
64KB
2 & 3
2 & 3
Open
Open
Open
Open
128KB
1 & 2
1 & 2
Open
Open
Open
Closed
256KB (A)
2 & 3
2 & 3
Open
Open
Closed
Closed
256KB (B)
1 & 2, 3 & 4
1 & 2
Open
Open
Closed
Closed
512KB (A)
2 & 3, 4 & 5
2 & 3
Open
Closed
Closed
Closed
512KB (B)
1 & 2, 3 & 4, 5 & 6
1 & 2
Open
Closed
Closed
Closed
1MB
2 & 3, 4 & 5, 6 & 7
2 & 3
Closed
Closed
Closed
Closed
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION
Speed
JP6
JP7
JP8
25MHz
Open
Open
Closed
33MHz
Closed
Closed
Closed
40MHz
Open
Closed
Closed
50iMHz
Open
Open
Closed
50MHz
Closed
Open
Open
66iMHz
Closed
Closed
Closed
75iMHz
Open
Open
Closed
100iMHz
Closed
Closed
Closed

CPU TYPE SELECTION
Type
JP27
JP28
JP29
CX486M6
2 & 3, 4 & 5
1 & 2, 3 & 4, 5 & 6
1 & 2, 3 & 4, 5 & 6
80486SX
Open
2 & 3
Open
AM486DXLT
Open
2 & 3
2 & 3
CX486M7
2 & 3
1 & 2, 3 & 4, 5 & 6
1 & 2, 3 & 4, 5 & 6
UMC U5
Open
2 & 3
2 & 3
80486DX
Open
2 & 3
Open
80486DX2
Open
2 & 3
Open
80486DX4
1 & 2, 3 & 4
1 & 2
1 & 2
SL80486DX4
1 & 2, 3 & 4
1 & 2
1 & 2
P24D
1 & 2, 3 & 4
1 & 2, 4 & 5
1 & 2, 4 & 5
P24T
1 & 2, 3 & 4
1 & 2
1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type
JP30
JP32
JP33
CX486M6
1 & 2, 3 & 4, 5 & 6
Open
2 & 3
80486SX
Open
Open
2 & 3
AM486DXLT
1 & 2
1 & 2, 3 & 4
1 & 2, 3 & 4
CX486M7
2 & 3, 4 & 5
1 & 2
1 & 2, 3 & 4
UMC U5
1 & 2
3 & 4
2 & 3
80486DX
Open
1 & 2
1 & 2, 3 & 4
80486DX2
Open
1 & 2
1 & 2, 3 & 4
80486DX4
5 & 6
1 & 2
1 & 2, 3 & 4
SL80486DX4
5 & 6
1 & 2
1 & 2, 3 & 4
P24D
3 & 4, 5 & 6
1 & 2
1 & 2, 3 & 4
P24T
5 & 6
2 & 3
1 & 2, 3 & 4
Note: Pins designated should be in the closed position.

CPU MULTIPLIER SELECTION (80486DX4 ONLY)
Multiplier
JP31
2x
Pins 2 & 3 closed
2.5x
Pins 1 & 2 closed
3x
Open

CPU VOLTAGE SELECTION
Voltage
JP24
JP25
JP26
3.3v
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
5v
Pins 2 & 3 closed
Pins 2 & 3 closed
Pins 2 & 3 closed

VL BUS WAIT STATE SELECTION
Setting
JP17
0
Open
1
Closed

VL-BUS SPEED SELECTION
Setting
JP16
<= 33MHz
Open
>33 MHz
Closed

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Processor	CX486M6/80486SX/AM486DXLT/CX486M7/UMC U5/80486DX/ 80486DX2/80486DX4/SL80486DX4/P24D/P24T
Processor Speed	25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Chip Set	C & T
Video Chip Set	None
Maximum Onboard Memory	64MB
Maximum Video Memory	None
Cache	64/128/256/512/1024KB
BIOS	AMI
Dimensions	254mm x 218mm
I/O Options	32-bit VESA local bus slots (3), green PC connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP1	Reset switch	JP20
Power LED & keylock	JP15	Turbo switch	JP22
Speaker	JP18	Green PC connector	JP23
Turbo LED	JP19	32-bit VESA local bus slots	SL1 - SL3

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Battery type select internal	JP1	Pins 2 & 3 closed
	Battery type select external	JP1	Closed
	CMOS memory clear	JP1	Pins 3 & 4 closed
»	Factory configured - do not alter	JP2	Open
	Flash BIOS voltage select 12v	JP3	Pins 2 & 3 closed
	Flash BIOS voltage select 5v	JP3	Pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
1MB	(1) 256K x 36	None	None
1MB	None	(1) 256K x 36	None
2MB	(1) 256K x 36	(1) 256K x 36	None
2MB	None	(1) 256K x 36	(4) 256K x 9
3MB	(1) 256K x 36	(1) 256K x 36	(4) 256K x 9
4MB	(1) 1M x 36	None	None
4MB	None	(1) 1M x 36	None
5MB	(1) 1M x 36	(1) 256K x 36	None
5MB	(1) 256K x 36	(1) 1M x 36	None
5MB	None	(1) 1M x 36	(4) 256K x 9
6MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 9
6MB	(1) 256K x 36	(1) 1M x 36	(4) 256K x 9
6MB	(1) 1M x 36	(1) 256K x 36	(4) 256K x 9
8MB	(1) 2M x 36	None	None
8MB	(1) 1M x 36	(1) 1M x 36	None
8MB	None	(1) 2M x 36	None
9MB	(1) 2M x 36	(1) 256K x 36	None
9MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 9
9MB	(1) 1M x 36	(1) 256K x 36	(1) 1M x 9
9MB	None	(1) 2M x 36	(4) 256K x 9
9MB	(1) 1M x 36	(1) 1M x 36	(4) 256K x 9
10MB	(1) 256K x 36	(1) 2M x 36	(4) 256K x 9
12MB	(1) 2M x 36	(1) 1M x 36	None
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 9
13MB	(1) 256K x 36	(1) 2M x 36	(1) 1M x 9
13MB	(1) 1M x 36	(1) 2M x 36	(4) 256K x 9
16MB	(1) 4M x 36	None	None
16MB	None	(1) 4M x 36	None
16MB	(1) 1M x 36	(1) 2M x 36	(1) 1M x 9
17MB	(1) 4M x 36	(1) 256K x 36	None
17MB	(1) 256K x 36	(1) 4M x 36	None
17MB	None	(1) 256K x 36	(1) 4M x 9

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2
17MB	(1) 256K x 36	None	(1) 4M x 9
17MB	None	(1) 4M x 36	(4) 256K x 9
18MB	(1) 256K x 36	(1) 256K x 36	(1) 4M x 9
18MB	(1) 256K x 36	(1) 4M x 36	(4) 256K x 9
18MB	(1) 4M x 36	(1) 256K x 36	(4) 256K x 9
20MB	(1) 4M x 36	(1) 1M x 36	None
20MB	(1) 1M x 36	(1) 4M x 36	None
20MB	None	(1) 1M x 36	(1) 4M x 9
21MB	(1) 256K x 36	(1) 1M x 36	(1) 4M x 9
21MB	(1) 1M x 36	(1) 256K x 36	(1) 4M x 9
21MB	(1) 256K x 36	(1) 4M x 36	(1) 1M x 9
21MB	(1) 4M x 36	(1) 256K x 36	(1) 1M x 9
21MB	(1) 1M x 36	(1) 4M x 36	(4) 256K x 9
21MB	(1) 4M x 36	(1) 1M x 36	(4) 256K x 9
24MB	(1) 2M x 36	(1) 4M x 36	None
24MB	None	(1) 2M x 36	(1) 4M x 9
24MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 9
24MB	(1) 1M x 36	(1) 4M x 36	(1) 1M x 9
24MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 9
25MB	(1) 256K x 36	(1) 2M x 36	(1) 4M x 9
25MB	(1) 4M x 36	(1) 2M x 36	(4) 256K x 9
28MB	(1) 4M x 36	(1) 2M x 36	(1) 1M x 9
32MB	(1) 8M x 36	None	None
32MB	(1) 4M x 36	(1) 4M x 36	None
32MB	None	(1) 8M x 36	None
32MB	None	(1) 4M x 36	(1) 4M x 9
33MB	(1) 8M x 36	(1) 256K x 36	None
33MB	(1) 256K x 36	(1) 8M x 36	None
33MB	(1) 256K x 36	(1) 4M x 36	(1) 4M x 9
33MB	(1) 4M x 36	(1) 256K x 36	(1) 4M x 9
33MB	None	(1) 8M x 36	(4) 256K x 9
33MB	(1) 4M x 36	(1) 4M x 36	(4) 256K x 9
34MB	(1) 256K x 36	(1) 8M x 36	(4) 256K x 9
36MB	(1) 8M x 36	(1) 1M x 36	None
36MB	(1) 1M x 36	(1) 8M x 36	None
36MB	(1) 1M x 36	(1) 4M x 36	(1) 4M x 9
36MB	(1) 4M x 36	(1) 1M x 36	(1) 4M x 9
36MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 9
37MB	(1) 256K x 36	(1) 8M x 36	(1) 1M x 9
37MB	(1) 1M x 36	(1) 8M x 36	(4) 256K x 9
40MB	(1) 2M x 36	(1) 8M x 36	None

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 (A)	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8
256KB (B)	(4) 64K x 8	None	(1) 32K x 8
512KB (A)	(4) 64K x 8	(4) 64K x 8	(1) 32K x 8
512KB (B)	(4) 128K x 8	None	(1) 32K x 8
1MB	(4) 128K x 8	(4) 128K x 8	(1) 64K x 8

CACHE JUMPER CONFIGURATION
Size	JP5	JP10	JP11	JP12	JP13	JP14
64KB	2 & 3	2 & 3	Open	Open	Open	Open
128KB	1 & 2	1 & 2	Open	Open	Open	Closed
256KB (A)	2 & 3	2 & 3	Open	Open	Closed	Closed
256KB (B)	1 & 2, 3 & 4	1 & 2	Open	Open	Closed	Closed
512KB (A)	2 & 3, 4 & 5	2 & 3	Open	Closed	Closed	Closed
512KB (B)	1 & 2, 3 & 4, 5 & 6	1 & 2	Open	Closed	Closed	Closed
1MB	2 & 3, 4 & 5, 6 & 7	2 & 3	Closed	Closed	Closed	Closed
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION
Speed	JP6	JP7	JP8
25MHz	Open	Open	Closed
33MHz	Closed	Closed	Closed
40MHz	Open	Closed	Closed
50iMHz	Open	Open	Closed
50MHz	Closed	Open	Open
66iMHz	Closed	Closed	Closed
75iMHz	Open	Open	Closed
100iMHz	Closed	Closed	Closed

CPU TYPE SELECTION
Type	JP27	JP28	JP29
CX486M6	2 & 3, 4 & 5	1 & 2, 3 & 4, 5 & 6	1 & 2, 3 & 4, 5 & 6
80486SX	Open	2 & 3	Open
AM486DXLT	Open	2 & 3	2 & 3
CX486M7	2 & 3	1 & 2, 3 & 4, 5 & 6	1 & 2, 3 & 4, 5 & 6
UMC U5	Open	2 & 3	2 & 3
80486DX	Open	2 & 3	Open
80486DX2	Open	2 & 3	Open
80486DX4	1 & 2, 3 & 4	1 & 2	1 & 2
SL80486DX4	1 & 2, 3 & 4	1 & 2	1 & 2
P24D	1 & 2, 3 & 4	1 & 2, 4 & 5	1 & 2, 4 & 5
P24T	1 & 2, 3 & 4	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP30	JP32	JP33
CX486M6	1 & 2, 3 & 4, 5 & 6	Open	2 & 3
80486SX	Open	Open	2 & 3
AM486DXLT	1 & 2	1 & 2, 3 & 4	1 & 2, 3 & 4
CX486M7	2 & 3, 4 & 5	1 & 2	1 & 2, 3 & 4
UMC U5	1 & 2	3 & 4	2 & 3
80486DX	Open	1 & 2	1 & 2, 3 & 4
80486DX2	Open	1 & 2	1 & 2, 3 & 4
80486DX4	5 & 6	1 & 2	1 & 2, 3 & 4
SL80486DX4	5 & 6	1 & 2	1 & 2, 3 & 4
P24D	3 & 4, 5 & 6	1 & 2	1 & 2, 3 & 4
P24T	5 & 6	2 & 3	1 & 2, 3 & 4
Note: Pins designated should be in the closed position.

CPU MULTIPLIER SELECTION (80486DX4 ONLY)
Multiplier	JP31
2x	Pins 2 & 3 closed
2.5x	Pins 1 & 2 closed
3x	Open

CPU VOLTAGE SELECTION
Voltage	JP24	JP25	JP26
3.3v	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
5v	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed

VL BUS WAIT STATE SELECTION
Setting	JP17
0	Open
1	Closed

VL-BUS SPEED SELECTION
Setting	JP16
<= 33MHz	Open
>33 MHz	Closed