Processor	AM486/UMCU5SX/80486SX/SL80486SX/CX486DX/AM486DX/80486DX/CX486DX2/AM486DX2/(SL)AM486DX2(WB)/(SL)AM486DX2(WT)/ 80486DX2/SL80486DX2/(SL)AM486DX4(WB)/(SL)AM486DX4(WT)/ AM486DX4/ 80486DX4/CXM1SC(WB)/CXM1SC(WT)/P24D/P24T
Processor Speed	20/25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)/120(internal)/133(internal)MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	128MB
Maximum Video Memory	None
Cache	64/128/256/512/1024KB
BIOS	Award
Dimensions	250mm x 220mm
I/O Options	32-bit PCI slots (4), floppy drive interface, game interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J1	IDE interface 1	J12
Turbo LED	J2	IDE interface 2	J13
Power LED & keylock	J3	Serial port 1	J14
Speaker	J4	Serial port 2	J15
Turbo switch	J5	Game interface	J16
Green PC connector	J6	Parallel port	J17
IDE interface LED	J7	Floppy drive interface	J18
External battery	J8	32-bit PCI slots	PC1 - PC4

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Turbo enabled	J5	Pins 2 & 3 closed
	Turbo disabled	J5	Pins 1 & 2 closed
»	Monitor type select color	JP33	Closed
	Monitor type select monochrome	JP33	Open
»	CMOS memory normal operation	JP38	Pins 1 & 2 closed
	CMOS memory clear	JP38	Pins 2 & 3 closed
»	Parallel port IRQ select IRQ7	JP51	Pins 1 & 2 closed
	Parallel port IRQ select IRQ5	JP51	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(1) 256K x 36	None	None	None
2MB	(1) 256K x 36	(1) 256K x 36	None	None
2MB	(1) 512K x 36	None	None	None
4MB	(1) 256K x 36	(1) 256K x 36	(1) 512K x 36	None
4MB	(1) 512K x 36	(1) 512K x 36	None	None
4MB	(1) 1M x 36	None	None	None
5MB	(1) 256K x 36	(1) 1M x 36	None	None
6MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	None
6MB	(1) 512K x 36	(1) 1M x 36	None	None
8MB	(1) 256K x 36	(1) 256K x 36	(1) 512K x 36	(1) 1M x 36
8MB	(1) 512K x 36	(1) 512K x 36	(1) 1M x 36	None
8MB	(1) 1M x 36	(1) 1M x 36	None	None
8MB	(1) 2M x 36	None	None	None
10MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 512K x 36	(1) 512K x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	None
12MB	(1) 1M x 36	(1) 2M x 36	None	None
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 2M x 36	(1) 2M x 36	None	None
16MB	(1) 4M x 36	None	None	None

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
16MB	(1) 4M x 36	None	None	None
17MB	(1) 256K x 36	(1) 4M x 36	None	None
18MB	(1) 256K x 36	(1) 256K x 36	(1) 4M x 36	None
18MB	(1) 512K x 36	(1) 4M x 36	None	None
20MB	(1) 512K x 36	(1) 512K x 36	(1) 4M x 36	None
20MB	(1) 1M x 36	(1) 4M x 36	None	None
20MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	None
24MB	(1) 512K x 36	(1) 512K x 36	(1) 1M x 36	(1) 4M x 36
24MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	None
24MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	None
24MB	(1) 1M x 36	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36
24MB	(1) 2M x 36	(1) 4M x 36	None	None
28MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
32MB	(1) 4M x 36	(1) 4M x 36	None	None
32MB	(1) 8M x 36	None	None	None
32MB	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36	None
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
36MB	(1) 512K x 36	(1) 512K x 36	(1) 4M x 36	(1) 4M x 36
36MB	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36	None
36MB	(1) 1M x 36	(1) 8M x 36	None	None
40MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36
40MB	(1) 1M x 36	(1) 1M x 36	(1) 8M x 36	None
40MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	None
48MB	(1) 4M x 36	(1) 8M x 36	None	None
48MB	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36	(1) 4M x 36
48MB	(1) 2M x 36	(1) 2M x 36	(1) 8M x 36	None
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
64MB	(1) 16M x 36	None	None	None
64MB	(1) 4M x 36	(1) 4M x 36	(1) 8M x 36	None
64MB	(1) 8M x 36	(1) 8M x 36	None	None
65MB	(1) 256K x 36	(1) 16M x 36	None	None
68MB	(1) 1M x 36	(1) 16M x 36	None	None
68MB	(1) 1M x 36	(1) 8M x 36	(1) 8M x 36	None
72MB	(1) 1M x 36	(1) 1M x 36	(1) 16M x 36	None
72MB	(1) 1M x 36	(1) 1M x 36	(1) 8M x 36	(1) 8M x 36
80MB	(1) 4M x 36	(1) 16M x 36	None	None
80MB	(1) 4M x 36	(1) 8M x 36	(1) 8M x 36	None
80MB	(1) 2M x 36	(1) 2M x 36	(1) 8M x 36	(1) 8M x 36
96MB	(1) 4M x 36	(1) 4M x 36	(1) 16M x 36	None
96MB	(1) 4M x 36	(1) 4M x 36	(1) 8M x 36	(1) 8M x 36
96MB	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36	None
128MB	(1) 16M x 36	(1) 16M x 36	None	None
128MB	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	Unidentified
128KB	(4) 32K x 8	None	Unidentified
256KB (A)	(4) 32K x 8	(4) 32K x 8	Unidentified
256KB (B)	(4) 64K x 8	None	Unidentified
512KB (A)	(4) 64K x 8	(4) 64K x 8	Unidentified
512KB (B)	(4) 128K x 8	None	Unidentified
1MB	(4) 128K x 8	(4) 128K x 8	Unidentified

CACHE JUMPER CONFIGURATION
Size	JP19	JP24	JP25	JP26
64KB	1 & 2	1 & 2	Open	Open
128KB	1 & 2	2 & 3	Open	1 & 2
256KB (A)	1 & 2	2 & 3	Open	2 & 3
256KB (B)	1 & 2	2 & 3	Open	1 & 2, 3 & 4
512KB (A)	2 & 3	2 & 3	Open	2 & 3, 4 & 5
512KB (B)	2 & 3	2 & 3	1 & 2	1 & 2, 4 & 5
1MB	2 & 3	2 & 3	2 & 3	2 & 3, 4 & 5
Note: Pins designated should be in the closed position.

TAG JUMPER CONFIGURATION
Size	JP20	JP21	JP22	JP27
64KB	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
128KB	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
256KB (A)	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
256KB (B)	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
512KB (A)	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
512KB (B)	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
1MB	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed

CPU SPEED SELECTION
Speed	JP3	JP18	S1	S2	S3
20MHz	1 & 2	1 & 2	Open	Open	Open
25MHz	1 & 2	1 & 2	Closed	Open	Open
33MHz	1 & 2	1 & 2	Closed	Closed	Closed
40MHz	1 & 2	1 & 2	Closed	Closed	Open
50iMHz	1 & 2	1 & 2	Closed	Open	Open
50MHz	2 & 3	1 & 2	Open	Open	Closed
66iMHz	1 & 2	1 & 2	Closed	Closed	Closed
75iMHz	1 & 2	1 & 2	Closed	Open	Open

CPU SPEED SELECTION (CON’T)
Speed	JP3	JP18	S1	S2	S3
80iMHz	1 & 2	1 & 2	Closed	Closed	Open
83iMHz	1 & 2	1 & 2	Closed	Closed	Closed
100iMHz	1 & 2	1 & 2	Closed	Closed	Closed
120iMHz	1 & 2	1 & 2	Closed	Closed	Open
133iMHz	1 & 2	1 & 2	Closed	Closed	Closed
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION
Type	JP4	JP5	JP6	JP7	JP8
AM486	Open	1 & 2	1 & 2	1 & 2	1 & 2
UMC U5SX	Open	Open	2 & 3	Open	2 & 3
80486SX	Open	Open	Open	Open	2 & 3
SL80486SX	Open	Open	1 & 2	Open	2 & 3
CX486DX	Open	Open	1 & 2	2 & 3	2 & 3
AM486DX	Open	2 & 3	1 & 2	1 & 2	2 & 3
80486DX	Open	Open	Open	Open	2 & 3
CX486DX2	Open	Open	1 & 2	2 & 3	2 & 3
AM486DX2	Open	2 & 3	1 & 2	1 & 2	2 & 3
(SL)AM486DX2 (WB)	Open	1 & 2	1 & 2	1 & 2	2 & 3
(SL)AM486DX2 (WT)	Open	2 & 3	1 & 2	1 & 2	2 & 3
80486DX2	Open	Open	Open	Open	2 & 3
SL80486DX2	Open	Open	1 & 2	1 & 2	2 & 3
(SL)AM486DX4 (WB)	Open	1 & 2	1 & 2	1 & 2	2 & 3
(SL)AM486DX4 (WT)	Open	2 & 3	1 & 2	1 & 2	2 & 3
AM486DX4	Open	1 & 2	1 & 2	1 & 2	2 & 3
80486DX4	Open	1 & 2	1 & 2	1 & 2	2 & 3
CX M1SC (WB)	Open	1 & 2	1 & 2	1 & 2	1 & 2
CX M1SC (WT)	Open	2 & 3	1 & 2	1 & 2	1 & 2
P24D	Open	Open	1 & 2	1 & 2	2 & 3
P24T	Open	Open	1 & 2	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP9	JP11	JP12	JP13
AM486	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 4 & 5 closed
UMC U5SX	Open	Open	Open	Open
80486SX	Open	Open	Open	Open
SL80486SX	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
CX486DX	Pins 1 & 2 closed	Open	Open	Pins 2 & 3 closed
AM486DX	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
80486DX	Open	Open	Open	Open
CX486DX2	Pins 1 & 2 closed	Open	Open	Pins 2 & 3 closed
AM486DX2	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
(SL)AM486DX2 (WB)	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
(SL)AM486DX2 (WT)	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
80486DX2	Open	Open	Open	Open
SL80486DX2	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
(SL)AM486DX4 (WB)	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
(SL)AM486DX4 (WT)	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
AM486DX4	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
80486DX4	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
CX M1SC (WB)	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 4 & 5 closed
CX M1SC (WT)	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 4 & 5 closed
P24D	Pins 2 & 3 closed	Open	Pins 1 & 2 closed	Pins 4 & 5 closed
P24T	Pins 2 & 3 closed	Open	Open	Pins 1 & 2 closed
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP14	JP15	JP16	JP17
AM486	1 & 2, 3 & 4	3 & 4	1 & 2, 3 & 4	Open
UMC U5SX	1 & 2, 3 & 4	1 & 2, 3 & 4	Open	3 & 4
80486SX	2 & 3	Open	Open	Open
SL80486SX	2 & 3	Open	3 & 4	Open
CX486DX	1 & 2, 3 & 4	3 & 4	2 & 3	2 & 3
AM486DX	1 & 2, 3 & 4	3 & 4	3 & 4	Open
80486DX	1 & 2, 3 & 4	3 & 4	Open	Open
CX486DX2	1 & 2, 3 & 4	3 & 4	2 & 3	2 & 3
AM486DX2	1 & 2, 3 & 4	3 & 4	3 & 4	Open
(SL)AM486DX2 (WB)	1 & 2, 3 & 4	3 & 4	3 & 4	Open
(SL)AM486DX2 (WT)	1 & 2, 3 & 4	3 & 4	3 & 4	Open
80486DX2	1 & 2, 3 & 4	3 & 4	Open	Open
SL80486DX2	1 & 2, 3 & 4	3 & 4	3 & 4	Open
(SL)AM486DX4 (WB)	1 & 2, 3 & 4	3 & 4	3 & 4	Open
(SL)AM486DX4 (WT)	1 & 2, 3 & 4	3 & 4	3 & 4	Open
AM486DX4	1 & 2, 3 & 4	3 & 4	3 & 4	Open
80486DX4	1 & 2, 3 & 4	3 & 4	3 & 4	Open
CX M1SC (WB)	1 & 2, 3 & 4	3 & 4	1 & 2	Open
CX M1SC (WT)	1 & 2, 3 & 4	3 & 4	1 & 2	Open
P24D	1 & 2, 3 & 4	3 & 4	3 & 4	Open
P24T	1 & 2, 3 & 4	2 & 3	3 & 4	1 & 2
Note: Pins designated should be in the closed position.

CPU MULTIPLIER SELECTION (DX4 ONLY)
Multiplier	JP10
2x	Pins 2 & 3 closed
3x	Open

CPU VOLTAGE SELECTION
Voltage	S4	S5	S6
3.3v	Pins 1 & 2 closed	Open	Open
3.45v	Open	Pins 1 & 2 closed	Open
3.6v	Open	Open	Pins 1 & 2 closed
4v	Open	Open	Open
5v	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed

DMA CHANNEL SELECTION
Channel		JP36	JP37	JP52	JP53
»	Printer	Open	Open	Pins 1 & 2 closed	Pins 1 & 2 closed
	1	Pins 1 & 3 closed	Pins 1 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
	3	Pins 2 & 4 closed	Pins 2 & 4 closed	Pins 1 & 2 closed	Pins 1 & 2 closed

FLASH BIOS SELECTION
Setting		JP34	JP35
»	EPROM	Pins 2 & 3 closed	Pins 2 & 3 closed
	5v flash	Pins 2 & 3 closed	Pins 1 & 2 closed
	12v flash	Pins 1 & 2 closed	Pins 1 & 2 closed