AP43 Motherboard Settings and Configuration

ACER, INC.

AP43

Processor
AM486SX/80486SX/SL80486SX/CX486DX/AM846DX/80486DX/ SL80486DX/CX486DX2/CX486DX2(M7P/O)/TI486DX2/AM486DX2/ (SL)AM486DX2/80486DX2/SL80486DX2/CX486DX4(M7P/O)/ CX486DX4(DX4P/O)/AM486DX4(V8T)/AM486DX4S(SV8T)/ AM486DX4S(SV8B)/80486DX4(WT)/80486DX4(WB)/P24D/P24T/ CX5X86
Processor Speed
25/33/40/50(internal)/66(internal)/75(internal)/100(internal)MHz
Chip Set
SIS
Video Chip Set
None
Maximum Onboard Memory
128MB
Maximum Video Memory
None
Cache
128/256/512KB
BIOS
AMI
Dimensions
250mm x 220mm
I/O Options
32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2)
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Serial port 2
CN1
Speaker
J7 pins 7 - 10
Serial port 1
CN2
Turbo/green PC LED
J7 pins 12 & 13
Chassis fan power
CN3
Turbo switch
J7 pins 15 - 17
Chassis fan power
CN4
Reset switch
J7 pins 19 & 20
Floppy drive interface
CN5
External battery
J8
Parallel port
CN6
Green PC connector
JP30
IDE interface 2
CN7
IDE interface LED
JP31
IDE interface 1
CN8
32-bit PCI slots
PC1 - PC3
Power LED & keylock
J7 pins 1 - 5

Note: If connector for J7 is 12-pin, connect red wire to pin 11.

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
Factory configured - do not alter
JP11
Unidentified
»
Factory configured - do not alter
JP12
Unidentified

On board I/O enabled
JP21
Pins 1 & 2 closed

On board I/O disabled
JP21
Pins 2 & 3 closed

Flash BIOS voltage select 12v
JP24
Pins 2 & 3 closed

Flash BIOS voltage select 5v
JP24
Pins 1 & 2 closed
»
CMOS memory normal operation
JP28
Pins 1 & 2 closed

CMOS memory clear
JP28
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) 512K x 36
None
None
None
2MB
(1) 256K x 36
(1) 256K x 36
None
None
3MB
(1) 512K x 36
(1) 256K x 36
None
None
3MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
None
3MB
(1) 256K x 36
(1) 512K x 36
None
None
4MB
(1) 1M x 36
None
None
None
4MB
(1) 512K x 36
(1) 256K x 36
(1) 256K x 36
None
4MB
(1) 512K x 36
(1) 512K x 36
None
None
4MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
5MB
(1) 1M x 36
(1) 256K x 36
None
None
5MB
(1) 512K x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
5MB
(1) 256K x 36
(1) 512K x 36
(1) 512K x 36
None
5MB
(1) 256K x 36
(1) 1M x 36
None
None
6MB
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
None
6MB
(1) 1M x 36
(1) 512K x 36
None
None
6MB
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
None
6MB
(1) 512K x 36
(1) 1M x 36
None
None
7MB
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
7MB
(1) 256K x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
8MB
(1) 2M x 36
None
None
None
8MB
(1) 1M x 36
(1) 512K x 36
(1) 512K x 36
None
8MB
(1) 1M x 36
(1) 1M x 36
None
None
8MB
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
9MB
(1) 2M x 36
(1) 256K x 36
None
None
9MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
None
9MB
(1) 256K x 36
(1) 2M x 36
None
None
10MB
(1) 2M x 36
(1) 256K x 36
(1) 256K x 36
None
10MB
(1) 2M x 36
(1) 512K x 36
None
None
10MB
(1) 1M x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
10MB
(1) 512K x 36
(1) 1M x 36
(1) 1M x 36
None
10MB
(1) 512K x 36
(1) 2M x 36
None
None
11MB
(1) 2M x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
12MB
(1) 2M x 36
(1) 512K x 36
(1) 512K x 36
None
12MB
(1) 2M x 36
(1) 1M x 36
None
None
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
13MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
14MB
(1) 2M x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
14MB
(1) 512K x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
16MB
(1) 4M x 36
None
None
None
16MB
(1) 2M x 36
(1) 1M x 36
(1) 1M x 36
None
16MB
(1) 2M 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
17MB
(1) 4M x 36
(1) 256K x 36
None
None
17MB
(1) 256K x 36
(1) 2M x 36
(1) 2M x 36
None
17MB
(1) 256K x 36
(1) 4M x 36
None
None
18MB
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
None
18MB
(1) 4M x 36
(1) 512K x 36
None
None
18MB
(1) 512K x 36
(1) 2M x 36
(1) 2M x 36
None
18MB
(1) 512K x 36
(1) 4M x 36
None
None
19MB
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
20MB
(1) 4M x 36
(1) 512K x 36
(1) 512K x 36
None
20MB
(1) 4M x 36
(1) 1M x 36
None
None
20MB
(1) 2M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
20MB
(1) 1M x 36
(1) 2M x 36
(1) 2M x 36
None
20MB
(1) 1M x 36
(1) 4M x 36
None
None
22MB
(1) 4M x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
24MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
None
24MB
(1) 4M x 36
(1) 2M x 36
None
None
24MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
None

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
24MB
(1) 2M x 36
(1) 4M x 36
None
None
25MB
(1) 256K x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
26MB
(1) 512K x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
28MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
28MB
(1) 1M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
32MB
(1) 8M x 36
None
None
None
32MB
(1) 4M x 36
(1) 2M x 36
(1) 2M x 36
None
32MB
(1) 4M x 36
(1) 4M x 36
None
None
32MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
33MB
(1) 8M x 36
(1) 256K x 36
None
None
33MB
(1) 256K x 36
(1) 4M x 36
(1) 4M x 36
None
33MB
(1) 256K x 36
(1) 8M x 36
None
None
34MB
(1) 8M x 36
(1) 256K x 36
(1) 256K x 36
None
34MB
(1) 8M x 36
(1) 512K x 36
None
None
34MB
(1) 512K x 36
(1) 4M x 36
(1) 4M x 36
None
34MB
(1) 512K x 36
(1) 8M x 36
None
None
35MB
(1) 8M x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
36MB
(1) 8M x 36
(1) 512K x 36
(1) 512K x 36
None
36MB
(1) 8M x 36
(1) 1M x 36
None
None
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
38MB
(1) 8M x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
40MB
(1) 8M x 36
(1) 1M x 36
(1) 1M x 36
None
40MB
(1) 8M x 36
(1) 2M x 36
None
None
40MB
(1) 4M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
40MB
(1) 2M x 36
(1) 4M x 36
(1) 4M x 36
None
40MB
(1) 2M x 36
(1) 8M x 36
None
None
44MB
(1) 8M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
48MB
(1) 8M x 36
(1) 2M x 36
(1) 2M x 36
None
48MB
(1) 8M x 36
(1) 4M x 36
None
None
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
49MB
(1) 256K x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
50MB
(1) 512K x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
52MB
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
56MB
(1) 8M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
56MB
(1) 2M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
64MB
(1) 8M x 36
(1) 4M x 36
(1) 4M x 36
None
64MB
(1) 8M x 36
(1) 8M x 36
None
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
65MB
(1) 256K x 36
(1) 8M x 36
(1) 8M x 36
None

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
65MB
(1) 16M x 36
(1) 256K x 36
None
None
66MB
(1) 16M x 36
(1) 256K x 36
(1) 256K x 36
None
66MB
(1) 16M x 36
(1) 512K x 36
None
None
67MB
(1) 16M x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
68MB
(1) 16M x 36
(1) 512K x 36
(1) 512K x 36
None
68MB
(1) 16M x 36
(1) 1M x 36
None
None
68MB
(1) 1M x 36
(1) 8M x 36
(1) 8M x 36
None
70MB
(1) 16M x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
72MB
(1) 16M x 36
(1) 2M x 36
None
None
72MB
(1) 2M x 36
(1) 8M x 36
(1) 8M x 36
None
76MB
(1) 16M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
80MB
(1) 16M x 36
(1) 2M x 36
(1) 2M x 36
None
80MB
(1) 4M x 36
(1) 8M x 36
(1) 8M x 36
None
88MB
(1) 16M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
96MB
(1) 16M x 36
(1) 4M x 36
(1) 4M x 36
None
96MB
(1) 16M x 36
(1) 8M x 36
None
None
96MB
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36
None
97MB
(1) 256K x 36
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36
98MB
(1) 512K x 36
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36
100MB
(1) 1M x 36
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36
104MB
(1) 2M x 36
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36
112MB
(1) 4M x 36
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36
128MB
(1) 16M 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
Note: Board also accepts x 32 SIMMs. The location of the banks is unidentified.

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
128KB
(4) 32K x 8
None
(1) 16K/32K x 8
256KB (A)
(4) 32K x 8
(4) 32K x 8
(1) 16K/32K x 8
256KB (B)
(4) 64K x 8
None
(1) 16K/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

CACHE JUMPER CONFIGURATION
Size
JP1
JP2
JP3
JP4
JP5
128KB
1 & 2, 3 & 4
1 & 2
2 & 3
1 & 2
1 & 2
256KB (A)
2 & 3, 4 & 5
2 & 3
2 & 3
1 & 2
2 & 3
256KB (B)
1 & 2, 3 & 4
1 & 2
1 & 2
1 & 2
2 & 3
512KB (A)
2 & 3, 4 & 5
2 & 3
2 & 3
2 & 3
2 & 3
512KB (B)
1 & 2, 3 & 4
1 & 2
2 & 3
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION
Speed
JP25
JP26
JP27
25MHz
Pins 2 & 3 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
33MHz
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
40MHz
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
50iMHz
Pins 2 & 3 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
66iMHz
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
75iMHz
Pins 2 & 3 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
100iMHz
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed

CPU TYPE SELECTION
Type
JP6
JP7
JP8
JP9
AM486SX
Open
Pins 2 & 3 closed
Open
Open
80486SX
Open
Pins 2 & 3 closed
Open
Open
SL80486SX
Open
Pins 2 & 3 closed
Open
Open
CX486DX
Open
Pins 2 & 3 closed
Open
Open
AM486DX
Open
Pins 2 & 3 closed
Open
Open
80486DX
Open
Pins 2 & 3 closed
Open
Open
SL80486DX
Open
Pins 2 & 3 closed
Open
Open
CX486DX2
Open
Pins 2 & 3 closed
Open
Open
CX486DX2 (M7 P/O)
Open
Pins 2 & 3 closed
Open
Open
TI486DX2
Open
Pins 2 & 3 closed
Open
Open
AM486DX2
Open
Pins 2 & 3 closed
Open
Open
(SL) AM486DX2
Open
Pins 2 & 3 closed
Open
Pins 2 & 3 closed
80486DX2
Open
Pins 2 & 3 closed
Open
Open
SL80486DX2
Open
Pins 2 & 3 closed
Open
Open
CX486DX4 (M7 P/O)
Open
Pins 2 & 3 closed
Open
Open
CX486DX4 (iDX4P/O)
Open
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
AM486DX4 (V8T)
Open
Pins 2 & 3 closed
Open
Open
AM486DX4S (SV8T)
Open
Pins 2 & 3 closed
Open
Open
AM486DX4S (SV8B)
Open
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
80486DX4 (WT)
Open
Pins 2 & 3 closed
Open
Open
80486DX4 (WB)
Open
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
P24D
Open
Pins 1 & 2 closed
1 & 2
1 & 2
P24T
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
Open
CX5X86
Open
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed

CPU TYPE SELECTION (CON’T)
Type
JP10
JP13
JP14
JP15
JP16
AM486SX
Open
Open
Open
2 & 3
Open
80486SX
Open
Open
Open
2 & 3
Open
SL80486SX
1 & 2
Open
2 & 3
2 & 3
Open
CX486DX
1 & 2
2 & 3
1 & 2
1 & 2, 3 & 4
3 & 4
AM486DX
Open
Open
Open
1 & 2, 3 & 4
3 & 4
80486DX
Open
Open
Open
1 & 2, 3 & 4
3 & 4
SL80486DX
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
CX486DX2
1 & 2
2 & 3
1 & 2
1 & 2, 3 & 4
3 & 4
CX486DX2 (M7 P/O)
1 & 2
2 & 3
1 & 2
1 & 2, 3 & 4
3 & 4
TI486DX2
1 & 2
2 & 3
1 & 2
1 & 2, 3 & 4
3 & 4
AM486DX2
Open
Open
Open
1 & 2, 3 & 4
3 & 4
(SL) AM486DX2
Open
Open
Open
1 & 2, 3 & 4
3 & 4
80486DX2
Open
Open
Open
1 & 2, 3 & 4
3 & 4
SL80486DX2
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
CX486DX4 (M7 P/O)
1 & 2
2 & 3
1 & 2
1 & 2, 3 & 4
3 & 4
CX486DX4 (iDX4P/O)
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
AM486DX4 (V8T)
Open
Open
Open
1 & 2, 3 & 4
3 & 4
AM486DX4S (SV8T)
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
AM486DX4S (SV8B)
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
80486DX4 (WT)
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
80486DX4 (WB)
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
P24D
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
P24T
1 & 2
1 & 2
2 & 3
1 & 2, 3 & 4
2 & 3
CX5X86
1 & 2
Open
2 & 3
1 & 2, 3 & 4
3 & 4
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type
JP17
JP18
JP19
JP20
JP29
AM486SX
Open
Open
Open
Open
2 & 3
80486SX
Open
Open
Open
Open
2 & 3
SL80486SX
3 & 4
Open
1 & 2
4 & 5
2 & 3
CX486DX
2 & 3
2 & 3
Open
2 & 3
2 & 3
AM486DX
Open
Open
Open
Open
2 & 3
80486DX
Open
Open
Open
Open
2 & 3
SL80486DX
3 & 4
Open
1 & 2
4 & 5
2 & 3
CX486DX2
2 & 3
2 & 3
Open
2 & 3
2 & 3
CX486DX2 (M7 P/O)
2 & 3
2 & 3
Open
2 & 3
1 & 2
TI486DX2
2 & 3
2 & 3
Open
2 & 3
1 & 2
AM486DX2
Open
Open
Open
Open
2 & 3
(SL) AM486DX2
Open
Open
Open
Open
1 & 2
80486DX2
Open
Open
Open
Open
2 & 3
SL80486DX2
3 & 4
Open
1 & 2
4 & 5
2 & 3
CX486DX4 (M7 P/O)
2 & 3
2 & 3
Open
2 & 3
1 & 2
CX486DX4 (iDX4P/O)
1 & 2, 3 & 4
1 & 2
2 & 3
4 & 5
1 & 2
AM486DX4 (V8T)
Open
Open
Open
Open
1 & 2
AM486DX4S (SV8T)
3 & 4
Open
1 & 2
4 & 5
1 & 2
AM486DX4S (SV8B)
1 & 2, 3 & 4
1 & 2
2 & 3
4 & 5
1 & 2
80486DX4 (WT)
3 & 4
Open
1 & 2
4 & 5
1 & 2
80486DX4 (WB)
1 & 2, 3 & 4
1 & 2
2 & 3
4 & 5
1 & 2
P24D
1 & 2, 3 & 4
1 & 2
2 & 3
4 & 5
2 & 3
P24T
3 & 4
1 & 2
Open
1 & 2
2 & 3
CX5X86
1 & 2, 3 & 4
1 & 2
2 & 3
4 & 5
1 & 2
Note: Pins designated should be in the closed position.

DMA CHANNEL SELECTION
Channel
JP22
JP23
1
Pins 2 & 3 closed
Pins 2 & 3 closed
3
Pins 1 & 2 closed
Pins 1 & 2 closed

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Processor	AM486SX/80486SX/SL80486SX/CX486DX/AM846DX/80486DX/ SL80486DX/CX486DX2/CX486DX2(M7P/O)/TI486DX2/AM486DX2/ (SL)AM486DX2/80486DX2/SL80486DX2/CX486DX4(M7P/O)/ CX486DX4(DX4P/O)/AM486DX4(V8T)/AM486DX4S(SV8T)/ AM486DX4S(SV8B)/80486DX4(WT)/80486DX4(WB)/P24D/P24T/ CX5X86
Processor Speed	25/33/40/50(internal)/66(internal)/75(internal)/100(internal)MHz
Chip Set	SIS
Video Chip Set	None
Maximum Onboard Memory	128MB
Maximum Video Memory	None
Cache	128/256/512KB
BIOS	AMI
Dimensions	250mm x 220mm
I/O Options	32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 2	CN1	Speaker	J7 pins 7 - 10
Serial port 1	CN2	Turbo/green PC LED	J7 pins 12 & 13
Chassis fan power	CN3	Turbo switch	J7 pins 15 - 17
Chassis fan power	CN4	Reset switch	J7 pins 19 & 20
Floppy drive interface	CN5	External battery	J8
Parallel port	CN6	Green PC connector	JP30
IDE interface 2	CN7	IDE interface LED	JP31
IDE interface 1	CN8	32-bit PCI slots	PC1 - PC3
Power LED & keylock	J7 pins 1 - 5
Note: If connector for J7 is 12-pin, connect red wire to pin 11.

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	JP11	Unidentified
»	Factory configured - do not alter	JP12	Unidentified
	On board I/O enabled	JP21	Pins 1 & 2 closed
	On board I/O disabled	JP21	Pins 2 & 3 closed
	Flash BIOS voltage select 12v	JP24	Pins 2 & 3 closed
	Flash BIOS voltage select 5v	JP24	Pins 1 & 2 closed
»	CMOS memory normal operation	JP28	Pins 1 & 2 closed
	CMOS memory clear	JP28	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) 512K x 36	None	None	None
2MB	(1) 256K x 36	(1) 256K x 36	None	None
3MB	(1) 512K x 36	(1) 256K x 36	None	None
3MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	None
3MB	(1) 256K x 36	(1) 512K x 36	None	None
4MB	(1) 1M x 36	None	None	None
4MB	(1) 512K x 36	(1) 256K x 36	(1) 256K x 36	None
4MB	(1) 512K x 36	(1) 512K x 36	None	None
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
5MB	(1) 1M x 36	(1) 256K x 36	None	None
5MB	(1) 512K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
5MB	(1) 256K x 36	(1) 512K x 36	(1) 512K x 36	None
5MB	(1) 256K x 36	(1) 1M x 36	None	None
6MB	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36	None
6MB	(1) 1M x 36	(1) 512K x 36	None	None
6MB	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36	None
6MB	(1) 512K x 36	(1) 1M x 36	None	None
7MB	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
7MB	(1) 256K x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
8MB	(1) 2M x 36	None	None	None
8MB	(1) 1M x 36	(1) 512K x 36	(1) 512K x 36	None
8MB	(1) 1M x 36	(1) 1M x 36	None	None
8MB	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
9MB	(1) 2M x 36	(1) 256K x 36	None	None
9MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	None
9MB	(1) 256K x 36	(1) 2M x 36	None	None
10MB	(1) 2M x 36	(1) 256K x 36	(1) 256K x 36	None
10MB	(1) 2M x 36	(1) 512K x 36	None	None
10MB	(1) 1M x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
10MB	(1) 512K x 36	(1) 1M x 36	(1) 1M x 36	None
10MB	(1) 512K x 36	(1) 2M x 36	None	None
11MB	(1) 2M x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
12MB	(1) 2M x 36	(1) 512K x 36	(1) 512K x 36	None
12MB	(1) 2M x 36	(1) 1M x 36	None	None
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
13MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
14MB	(1) 2M x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
14MB	(1) 512K x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 4M x 36	None	None	None
16MB	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36	None
16MB	(1) 2M 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
17MB	(1) 4M x 36	(1) 256K x 36	None	None
17MB	(1) 256K x 36	(1) 2M x 36	(1) 2M x 36	None
17MB	(1) 256K x 36	(1) 4M x 36	None	None
18MB	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36	None
18MB	(1) 4M x 36	(1) 512K x 36	None	None
18MB	(1) 512K x 36	(1) 2M x 36	(1) 2M x 36	None
18MB	(1) 512K x 36	(1) 4M x 36	None	None
19MB	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
20MB	(1) 4M x 36	(1) 512K x 36	(1) 512K x 36	None
20MB	(1) 4M x 36	(1) 1M x 36	None	None
20MB	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
20MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	None
20MB	(1) 1M x 36	(1) 4M x 36	None	None
22MB	(1) 4M x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
24MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	None
24MB	(1) 4M x 36	(1) 2M x 36	None	None
24MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	None

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
128KB	(4) 32K x 8	None	(1) 16K/32K x 8
256KB (A)	(4) 32K x 8	(4) 32K x 8	(1) 16K/32K x 8
256KB (B)	(4) 64K x 8	None	(1) 16K/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

CACHE JUMPER CONFIGURATION
Size	JP1	JP2	JP3	JP4	JP5
128KB	1 & 2, 3 & 4	1 & 2	2 & 3	1 & 2	1 & 2
256KB (A)	2 & 3, 4 & 5	2 & 3	2 & 3	1 & 2	2 & 3
256KB (B)	1 & 2, 3 & 4	1 & 2	1 & 2	1 & 2	2 & 3
512KB (A)	2 & 3, 4 & 5	2 & 3	2 & 3	2 & 3	2 & 3
512KB (B)	1 & 2, 3 & 4	1 & 2	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION
Speed	JP25	JP26	JP27
25MHz	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
33MHz	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
40MHz	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
50iMHz	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
66iMHz	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
75iMHz	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
100iMHz	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed

CPU TYPE SELECTION
Type	JP6	JP7	JP8	JP9
AM486SX	Open	Pins 2 & 3 closed	Open	Open
80486SX	Open	Pins 2 & 3 closed	Open	Open
SL80486SX	Open	Pins 2 & 3 closed	Open	Open
CX486DX	Open	Pins 2 & 3 closed	Open	Open
AM486DX	Open	Pins 2 & 3 closed	Open	Open
80486DX	Open	Pins 2 & 3 closed	Open	Open
SL80486DX	Open	Pins 2 & 3 closed	Open	Open
CX486DX2	Open	Pins 2 & 3 closed	Open	Open
CX486DX2 (M7 P/O)	Open	Pins 2 & 3 closed	Open	Open
TI486DX2	Open	Pins 2 & 3 closed	Open	Open
AM486DX2	Open	Pins 2 & 3 closed	Open	Open
(SL) AM486DX2	Open	Pins 2 & 3 closed	Open	Pins 2 & 3 closed
80486DX2	Open	Pins 2 & 3 closed	Open	Open
SL80486DX2	Open	Pins 2 & 3 closed	Open	Open
CX486DX4 (M7 P/O)	Open	Pins 2 & 3 closed	Open	Open
CX486DX4 (iDX4P/O)	Open	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
AM486DX4 (V8T)	Open	Pins 2 & 3 closed	Open	Open
AM486DX4S (SV8T)	Open	Pins 2 & 3 closed	Open	Open
AM486DX4S (SV8B)	Open	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
80486DX4 (WT)	Open	Pins 2 & 3 closed	Open	Open
80486DX4 (WB)	Open	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
P24D	Open	Pins 1 & 2 closed	1 & 2	1 & 2
P24T	Pins 1 & 2 closed	Pins 1 & 2 closed	Open	Open
CX5X86	Open	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed

CPU TYPE SELECTION (CON’T)
Type	JP10	JP13	JP14	JP15	JP16
AM486SX	Open	Open	Open	2 & 3	Open
80486SX	Open	Open	Open	2 & 3	Open
SL80486SX	1 & 2	Open	2 & 3	2 & 3	Open
CX486DX	1 & 2	2 & 3	1 & 2	1 & 2, 3 & 4	3 & 4
AM486DX	Open	Open	Open	1 & 2, 3 & 4	3 & 4
80486DX	Open	Open	Open	1 & 2, 3 & 4	3 & 4
SL80486DX	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
CX486DX2	1 & 2	2 & 3	1 & 2	1 & 2, 3 & 4	3 & 4
CX486DX2 (M7 P/O)	1 & 2	2 & 3	1 & 2	1 & 2, 3 & 4	3 & 4
TI486DX2	1 & 2	2 & 3	1 & 2	1 & 2, 3 & 4	3 & 4
AM486DX2	Open	Open	Open	1 & 2, 3 & 4	3 & 4
(SL) AM486DX2	Open	Open	Open	1 & 2, 3 & 4	3 & 4
80486DX2	Open	Open	Open	1 & 2, 3 & 4	3 & 4
SL80486DX2	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
CX486DX4 (M7 P/O)	1 & 2	2 & 3	1 & 2	1 & 2, 3 & 4	3 & 4
CX486DX4 (iDX4P/O)	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
AM486DX4 (V8T)	Open	Open	Open	1 & 2, 3 & 4	3 & 4
AM486DX4S (SV8T)	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
AM486DX4S (SV8B)	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
80486DX4 (WT)	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
80486DX4 (WB)	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
P24D	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
P24T	1 & 2	1 & 2	2 & 3	1 & 2, 3 & 4	2 & 3
CX5X86	1 & 2	Open	2 & 3	1 & 2, 3 & 4	3 & 4
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP17	JP18	JP19	JP20	JP29
AM486SX	Open	Open	Open	Open	2 & 3
80486SX	Open	Open	Open	Open	2 & 3
SL80486SX	3 & 4	Open	1 & 2	4 & 5	2 & 3
CX486DX	2 & 3	2 & 3	Open	2 & 3	2 & 3
AM486DX	Open	Open	Open	Open	2 & 3
80486DX	Open	Open	Open	Open	2 & 3
SL80486DX	3 & 4	Open	1 & 2	4 & 5	2 & 3
CX486DX2	2 & 3	2 & 3	Open	2 & 3	2 & 3
CX486DX2 (M7 P/O)	2 & 3	2 & 3	Open	2 & 3	1 & 2
TI486DX2	2 & 3	2 & 3	Open	2 & 3	1 & 2
AM486DX2	Open	Open	Open	Open	2 & 3
(SL) AM486DX2	Open	Open	Open	Open	1 & 2
80486DX2	Open	Open	Open	Open	2 & 3
SL80486DX2	3 & 4	Open	1 & 2	4 & 5	2 & 3
CX486DX4 (M7 P/O)	2 & 3	2 & 3	Open	2 & 3	1 & 2
CX486DX4 (iDX4P/O)	1 & 2, 3 & 4	1 & 2	2 & 3	4 & 5	1 & 2
AM486DX4 (V8T)	Open	Open	Open	Open	1 & 2
AM486DX4S (SV8T)	3 & 4	Open	1 & 2	4 & 5	1 & 2
AM486DX4S (SV8B)	1 & 2, 3 & 4	1 & 2	2 & 3	4 & 5	1 & 2
80486DX4 (WT)	3 & 4	Open	1 & 2	4 & 5	1 & 2
80486DX4 (WB)	1 & 2, 3 & 4	1 & 2	2 & 3	4 & 5	1 & 2
P24D	1 & 2, 3 & 4	1 & 2	2 & 3	4 & 5	2 & 3
P24T	3 & 4	1 & 2	Open	1 & 2	2 & 3
CX5X86	1 & 2, 3 & 4	1 & 2	2 & 3	4 & 5	1 & 2
Note: Pins designated should be in the closed position.

DMA CHANNEL SELECTION
Channel	JP22	JP23
1	Pins 2 & 3 closed	Pins 2 & 3 closed
3	Pins 1 & 2 closed	Pins 1 & 2 closed