486-PIO-2 (REV. A2) Motherboard Settings and Configuration

FIRST INTERNATIONAL COMPUTER, INC.

486-PIO-2 (REV. A2)

Processor
80486SX/CX486DX/SL80486DX/UMCU5SD/UMCU5S/UMCU5SLV/ CX486DX2/AM486DX2/(SL)AM486DX2/SL80486DX2/AM486DX4/ (SL)AM486DX4/80486FX4/P24D/P24S/P24T/CXM1
Processor Speed
25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz
Chip Set
VIA
Video Chip Set
None
Maximum Onboard Memory
128MB
Maximum Video Memory
None
Cache
128/256/512KB
BIOS
Award
Dimensions
330mm x 218mm
I/O Options
32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2)
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Floppy drive interface
CN1
External battery
J6
Parallel port
CN2
Green PC connector
J7
Serial port 2
CN3
Chassis fan power
J8
Serial port 1
CN4
Power LED & keylock
J9
IDE interface 2
CN5
Speaker
J10
IDE interface 1
CN6
Reset switch
J11
IDE interface LED
J3
Turbo switch
J12
Green PC LED
J4
Turbo LED
J13
Outlet connector
J5
32-bit PCI slots
PC1 - PC4

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
Monitor type select monochrome/EGA/VGA
J1
Open

Monitor type select CGA
J1
Closed
»
Password normal operation
J2
Open

Password clear
J2
Closed

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

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
6MB
None
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
6MB
(1) 1M x 36
None
(1) 256K x 36
(1) 256K x 36
7MB
(1) 256K x 36
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
7MB
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
8MB
(1) 1M x 36
(1) 1M x 36
None
None
8MB
(1) 1M x 36
None
(1) 1M x 36
None
8MB
None
None
(1) 1M x 36
(1) 1M x 36
8MB
None
(1) 1M x 36
(1) 1M x 36
None
9MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
None
9MB
(1) 1M x 36
(1) 256K x 36
(1) 1M x 36
None
9MB
(1) 1M x 36
(1) 1M x 36
(1) 256K x 36
None
9MB
None
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
9MB
(1) 256K x 36
None
(1) 1M x 36
(1) 1M x 36
10MB
(1) 256K x 36
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
10MB
(1) 1M x 36
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
12MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
None
12MB
None
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
12MB
(1) 1M x 36
None
(1) 1M x 36
(1) 1M x 36
13MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
13MB
(1) 1M x 36
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
16MB
None
(1) 4M x 36
None
None
16MB
None
None
(1) 4M x 36
None
16MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
17MB
(1) 256K x 36
(1) 4M x 36
None
None
17MB
(1) 256K x 36
None
(1) 4M x 36
None
17MB
None
(1) 256K x 36
(1) 4M x 36
None
17MB
None
(1) 4M x 36
(1) 256K x 36
None
18MB
(1) 256K x 36
(1) 256K x 36
(1) 4M x 36
None
18MB
(1) 256K x 36
(1) 4M x 36
(1) 256K x 36
None
18MB
None
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
19MB
(1) 256K x 36
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
20MB
(1) 1M x 36
(1) 4M x 36
None
None
20MB
(1) 1M x 36
None
(1) 4M x 36
None
20MB
None
(1) 4M x 36
(1) 1M x 36
None
20MB
None
(1) 1M x 36
(1) 4M x 36
None
21MB
(1) 256K x 36
(1) 1M x 36
(1) 4M x 36
None
21MB
(1) 256K x 36
(1) 4M x 36
(1) 1M x 36
None
21MB
(1) 1M x 36
(1) 256K x 36
(1) 4M x 36
None
21MB
(1) 1M x 36
(1) 4M x 36
(1) 256K x 36
None
22MB
(1) 1M x 36
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
24MB
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
None
24MB
(1) 1M x 36
(1) 4M x 36
(1) 1M x 36
None

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
24MB
None
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
25MB
(1) 256K x 36
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
28MB
(1) 1M x 36
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
33MB
(1) 256K x 36
(1) 4M x 36
(1) 4M x 36
None
33MB
(1) 256K x 36
None
(1) 4M x 36
(1) 4M x 36
34MB
(1) 256K x 36
(1) 256K 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
None
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
36MB
(1) 1M x 36
None
(1) 4M x 36
(1) 4M x 36
37MB
(1) 256K x 36
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
37MB
(1) 1M x 36
(1) 256K x 36
(1) 4M x 36
(1) 4M x 36
40MB
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
48MB
None
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
49MB
(1) 256K 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
64MB
None
(1) 8M x 36
(1) 8M x 36
None
65MB
(1) 256K x 36
(1) 16M x 36
None
None
65MB
(1) 256K x 36
(1) 8M x 36
(1) 8M x 36
None
66MB
(1) 256K x 36
(1) 256K x 36
(1) 8M x 36
(1) 8M x 36
66MB
(1) 256K x 36
(1) 8M x 36
(1) 256K x 36
(1) 8M x 36
66MB
(1) 8M x 36
(1) 8M x 36
(1) 256K x 36
(1) 256K x 36
68MB
(1) 1M x 36
(1) 8M x 36
(1) 8M x 36
None
68MB
None
(1) 1M x 36
(1) 8M x 36
(1) 8M x 36
68MB
(1) 8M x 36
(1) 8M x 36
(1) 1M x 36
None
69MB
(1) 256K x 36
(1) 1M x 36
(1) 8M x 36
(1) 8M x 36
69MB
(1) 256K x 36
(1) 8M x 36
(1) 1M x 36
(1) 8M x 36
69MB
(1) 1M x 36
(1) 256K x 36
(1) 8M x 36
(1) 8M x 36
69MB
(1) 1M x 36
(1) 8M x 36
(1) 256K x 36
(1) 8M x 36
72MB
(1) 1M x 36
(1) 1M x 36
(1) 8M x 36
(1) 8M x 36
72MB
(1) 1M x 36
(1) 8M x 36
(1) 1M x 36
(1) 8M x 36
72MB
(1) 8M x 36
(1) 8M x 36
(1) 1M x 36
(1) 1M x 36
80MB
(1) 8M x 36
(1) 4M x 36
(1) 8M x 36
None
80MB
(1) 8M x 36
(1) 8M x 36
(1) 4M x 36
None
81MB
(1) 256K x 36
(1) 4M x 36
(1) 8M x 36
(1) 8M x 36
81MB
(1) 256K x 36
(1) 8M x 36
(1) 4M x 36
(1) 8M x 36
84MB
(1) 1M x 36
(1) 4M x 36
(1) 8M x 36
(1) 8M x 36
84MB
(1) 1M x 36
(1) 8M x 36
(1) 4M x 36
(1) 8M x 36
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
128MB
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36

CACHE CONFIGURATION
Size
Bank 0
TAG
128KB
(4) 32K x 8
(1) 8K x 8
256KB
(4) 64K x 8
(1) 32K x 8
512KB
(4) 128K x 8
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
JS1
JS2
128KB
Pins 1 & 2 closed
Pins 1 & 2 closed
256KB
Pins 2 & 3 closed
Pins 1 & 2 closed
512KB
Pins 2 & 3 closed
Pins 2 & 3 closed

CPU SPEED SELECTION
Speed
JK1
JK2
JK3
JK4
25MHz
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
33MHz
Pins 2 & 3 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
40MHz
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
50iMHz
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
50MHz
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 2 & 3 closed
66iMHz
Pins 2 & 3 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
75iMHz
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
80iMHz
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
100iMHz
Pins 2 & 3 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed

CPU TYPE SELECTION
Type
JC2
JC3
JC4
JC5
80486SX
Open
Pins 2 & 3 closed
Pins 2 & 3 closed
Open
CX486DX
Open
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
SL80486DX
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
UMCU5SD
Open
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
UMCU5S
Open
Pins 2 & 3 closed
Pins 2 & 3 closed
Open
UMCU5SLV
Open
Pins 2 & 3 closed
Pins 2 & 3 closed
Open
CX486DX2
Open
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
AM486DX2
Open
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
(SL)AM486DX2
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
SL80486DX2
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
AM486DX4
Open
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
(SL)AM486DX4
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
80486DX4 (ODP)
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
80486DX4 (2x)
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
80486DX4 (3x)
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
P24D
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
P24S
Pins 2 & 3 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
P24T
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Closed
CXM1
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 1 & 2 closed
Open

CPU TYPE SELECTION (CON’T)
Type
RNA
RNC
RNI
80486SX
Not installed
Not installed
Pins 1 - 5 closed
CX486DX
Not installed
Installed
Not installed
SL80486DX
Not installed
Not installed
Pins 1 - 5 closed
UMCU5SD
Installed
Not installed
Not installed
UMCU5S
Installed
Not installed
Not installed
UMCU5SLV
Installed
Not installed
Not installed
CX486DX2
Not installed
Installed
Not installed
AM486DX2
Installed
Not installed
Not installed
(SL)AM486DX2
Not installed
Not installed
Pins 6 - 10 closed
SL80486DX2
Not installed
Not installed
Pins 1 - 5 closed
AM486DX4
Installed
Not installed
Not installed
(SL)AM486DX4
Not installed
Not installed
Pins 6 - 10 closed
80486DX4 (ODP)
Not installed
Not installed
Pins 1 - 5 closed
80486DX4 (2x)
Not installed
Not installed
Pins 1 - 5 closed
80486DX4 (3x)
Not installed
Not installed
Pins 1 - 5 closed
P24D
Not installed
Not installed
Pins 1 - 5 closed
P24S
Not installed
Not installed
Pins 1 - 5 closed
P24T
Not installed
Not installed
Pins 1 - 5 closed
CXM1
Not installed
Not installed
Pins 6 - 10 closed

CPU VOLTAGE SELECTION
Voltage
CN3V
JPW1
JPW2
3.3v
Open
1 & 2
Open
3.45v
Open
2 & 3
Open
3.6v
Open
Open
1 & 2
4v
Open
Open
2 & 3
5v
1, & 2, 3 & 4, 13 & 14, 15 & 16
N/A
N/A
Note: Pins designated should be in the closed position.

PCI-BUS CLOCK SELECTION
CPU clock
JCK
JT1
<= 33MHz
Pins 1 & 2 closed
Pins 1 & 2 closed
>33 MHz
Pins 2 & 3 closed
Pins 2 & 3 closed

DMA CHANNEL SELECTION
Channel
JEPP1
JEPP2
»
1
Pins 2 & 3 closed
Pins 2 & 3 closed

3
Pins 1 & 2 closed
Pins 1 & 2 closed

KEYBOARD SELECTION
Setting
JX3
RN1
RN16
RN19
»
Internal controller
Pins 1 & 2 closed
Not installed
Installed
Not installed

External controller
Pins 2 & 3 closed
Installed
Not installed
Installed

PRINTER PORT SELECTION
Setting
JH
JG
»
Output
Pins 2 & 3 closed
Pins 2 & 3 closed

Input
Pins 1 & 2 closed
Pins 1 & 2 closed

Bidirectional
Pins 2 & 3 closed
N/A

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486-PIO-2 (REV. A2) Motherboard Settings and Configuration

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Processor	80486SX/CX486DX/SL80486DX/UMCU5SD/UMCU5S/UMCU5SLV/ CX486DX2/AM486DX2/(SL)AM486DX2/SL80486DX2/AM486DX4/ (SL)AM486DX4/80486FX4/P24D/P24S/P24T/CXM1
Processor Speed	25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz
Chip Set	VIA
Video Chip Set	None
Maximum Onboard Memory	128MB
Maximum Video Memory	None
Cache	128/256/512KB
BIOS	Award
Dimensions	330mm x 218mm
I/O Options	32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Floppy drive interface	CN1	External battery	J6
Parallel port	CN2	Green PC connector	J7
Serial port 2	CN3	Chassis fan power	J8
Serial port 1	CN4	Power LED & keylock	J9
IDE interface 2	CN5	Speaker	J10
IDE interface 1	CN6	Reset switch	J11
IDE interface LED	J3	Turbo switch	J12
Green PC LED	J4	Turbo LED	J13
Outlet connector	J5	32-bit PCI slots	PC1 - PC4

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Monitor type select monochrome/EGA/VGA	J1	Open
	Monitor type select CGA	J1	Closed
»	Password normal operation	J2	Open
	Password clear	J2	Closed

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

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
6MB	None	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36
6MB	(1) 1M x 36	None	(1) 256K x 36	(1) 256K x 36
7MB	(1) 256K x 36	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36
7MB	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
8MB	(1) 1M x 36	(1) 1M x 36	None	None
8MB	(1) 1M x 36	None	(1) 1M x 36	None
8MB	None	None	(1) 1M x 36	(1) 1M x 36
8MB	None	(1) 1M x 36	(1) 1M x 36	None
9MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	None
9MB	(1) 1M x 36	(1) 256K x 36	(1) 1M x 36	None
9MB	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36	None
9MB	None	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
9MB	(1) 256K x 36	None	(1) 1M x 36	(1) 1M x 36
10MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
10MB	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	None
12MB	None	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	None	(1) 1M x 36	(1) 1M x 36
13MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
13MB	(1) 1M x 36	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
16MB	None	(1) 4M x 36	None	None
16MB	None	None	(1) 4M x 36	None
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
17MB	(1) 256K x 36	(1) 4M x 36	None	None
17MB	(1) 256K x 36	None	(1) 4M x 36	None
17MB	None	(1) 256K x 36	(1) 4M x 36	None
17MB	None	(1) 4M x 36	(1) 256K x 36	None
18MB	(1) 256K x 36	(1) 256K x 36	(1) 4M x 36	None
18MB	(1) 256K x 36	(1) 4M x 36	(1) 256K x 36	None
18MB	None	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36
19MB	(1) 256K x 36	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36
20MB	(1) 1M x 36	(1) 4M x 36	None	None
20MB	(1) 1M x 36	None	(1) 4M x 36	None
20MB	None	(1) 4M x 36	(1) 1M x 36	None
20MB	None	(1) 1M x 36	(1) 4M x 36	None
21MB	(1) 256K x 36	(1) 1M x 36	(1) 4M x 36	None
21MB	(1) 256K x 36	(1) 4M x 36	(1) 1M x 36	None
21MB	(1) 1M x 36	(1) 256K x 36	(1) 4M x 36	None
21MB	(1) 1M x 36	(1) 4M x 36	(1) 256K x 36	None
22MB	(1) 1M x 36	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36
24MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	None
24MB	(1) 1M x 36	(1) 4M x 36	(1) 1M x 36	None

CACHE CONFIGURATION
Size	Bank 0	TAG
128KB	(4) 32K x 8	(1) 8K x 8
256KB	(4) 64K x 8	(1) 32K x 8
512KB	(4) 128K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JS1	JS2
128KB	Pins 1 & 2 closed	Pins 1 & 2 closed
256KB	Pins 2 & 3 closed	Pins 1 & 2 closed
512KB	Pins 2 & 3 closed	Pins 2 & 3 closed

CPU SPEED SELECTION
Speed	JK1	JK2	JK3	JK4
25MHz	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
33MHz	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
40MHz	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
50iMHz	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
50MHz	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
66iMHz	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
75iMHz	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
80iMHz	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
100iMHz	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed

CPU TYPE SELECTION
Type	JC2	JC3	JC4	JC5
80486SX	Open	Pins 2 & 3 closed	Pins 2 & 3 closed	Open
CX486DX	Open	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
SL80486DX	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
UMCU5SD	Open	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
UMCU5S	Open	Pins 2 & 3 closed	Pins 2 & 3 closed	Open
UMCU5SLV	Open	Pins 2 & 3 closed	Pins 2 & 3 closed	Open
CX486DX2	Open	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
AM486DX2	Open	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
(SL)AM486DX2	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
SL80486DX2	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
AM486DX4	Open	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
(SL)AM486DX4	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
80486DX4 (ODP)	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
80486DX4 (2x)	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
80486DX4 (3x)	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
P24D	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
P24S	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open
P24T	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Closed
CXM1	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Open

CPU TYPE SELECTION (CON’T)
Type	RNA	RNC	RNI
80486SX	Not installed	Not installed	Pins 1 - 5 closed
CX486DX	Not installed	Installed	Not installed
SL80486DX	Not installed	Not installed	Pins 1 - 5 closed
UMCU5SD	Installed	Not installed	Not installed
UMCU5S	Installed	Not installed	Not installed
UMCU5SLV	Installed	Not installed	Not installed
CX486DX2	Not installed	Installed	Not installed
AM486DX2	Installed	Not installed	Not installed
(SL)AM486DX2	Not installed	Not installed	Pins 6 - 10 closed
SL80486DX2	Not installed	Not installed	Pins 1 - 5 closed
AM486DX4	Installed	Not installed	Not installed
(SL)AM486DX4	Not installed	Not installed	Pins 6 - 10 closed
80486DX4 (ODP)	Not installed	Not installed	Pins 1 - 5 closed
80486DX4 (2x)	Not installed	Not installed	Pins 1 - 5 closed
80486DX4 (3x)	Not installed	Not installed	Pins 1 - 5 closed
P24D	Not installed	Not installed	Pins 1 - 5 closed
P24S	Not installed	Not installed	Pins 1 - 5 closed
P24T	Not installed	Not installed	Pins 1 - 5 closed
CXM1	Not installed	Not installed	Pins 6 - 10 closed

CPU VOLTAGE SELECTION
Voltage	CN3V	JPW1	JPW2
3.3v	Open	1 & 2	Open
3.45v	Open	2 & 3	Open
3.6v	Open	Open	1 & 2
4v	Open	Open	2 & 3
5v	1, & 2, 3 & 4, 13 & 14, 15 & 16	N/A	N/A
Note: Pins designated should be in the closed position.

PCI-BUS CLOCK SELECTION
CPU clock	JCK	JT1
<= 33MHz	Pins 1 & 2 closed	Pins 1 & 2 closed
>33 MHz	Pins 2 & 3 closed	Pins 2 & 3 closed

DMA CHANNEL SELECTION
Channel		JEPP1	JEPP2
»	1	Pins 2 & 3 closed	Pins 2 & 3 closed
	3	Pins 1 & 2 closed	Pins 1 & 2 closed

KEYBOARD SELECTION
Setting		JX3	RN1	RN16	RN19
»	Internal controller	Pins 1 & 2 closed	Not installed	Installed	Not installed
	External controller	Pins 2 & 3 closed	Installed	Not installed	Installed

PRINTER PORT SELECTION
Setting		JH	JG
»	Output	Pins 2 & 3 closed	Pins 2 & 3 closed
	Input	Pins 1 & 2 closed	Pins 1 & 2 closed
	Bidirectional	Pins 2 & 3 closed	N/A