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Board Name: EISA3/VL
Part #: 09-00181-xx
Size: Full-Size AT (13.8” x 12.02”) Chip Sets: Micronics EISA Chip Set
Expansion Slots: 6 EISA Cache Options: 256K expandable to 512K
2 EISA/VL
Processor Specifications: 486SX25; SX33 BIOS: Phoenix BIOS on 1MB flash BIOS
486DX33
486DX2/50; 486DX2/66 IDE Interface: Resident 40-pin IDE connectors
Memory: (4) 72-pin SIMM sockets to accommodate: Floppy Support: 360K, 1.2MB, 1.44MB or 2.88MB
256K x 36 (1MB); 1MB x 36 (4MB) Communication Ports: 2 on-board 16550 serial ports
4MB x 36 (16MB) 1 on-board bi-directional port
MAX: 64MB
Keyboard: Standard AT-Style DIN connector
Cache Size Selection
Jumper 64K 128K 256K 512K
W8 1-2 2-3 2-3 2-3
W9 1-2 1-2 2-3 2-3
W10 1-2 1-2 1-2 2-3
W11 1-2 2-3 2-3 2-3
W12 1-2 1-2 2-3 2-3
W13 1-2 1-2 1-2 2-3
W14 3-4 4-5 1-2 4-5
W15 2-3 1-2 1-2 1-2
CPU Selection
Main CPU CPU Socket W2 W5 W6
i486SX None 1-2 1-2 None
i486SX i486DX2 1-2 2-3 1-2 & 3-4
i486SX i486DX 2-3 1-2 1-2 & 3-4
i486SX i486SX 1-2 2-3 1-2 & 3-4
None i486DX 2-3 1-2 1-2 & 3-4
None i486DX2 1-2 1-2 1-2 & 3-4
None i486SX 1-2 2-3 2-3
None i487SX 1-2 2-3 1-2 & 3-4
None P24T 2-3 2-3 1-2 & 3-4
CPU Speed Selection
W3 CPU Speed
On i486SX-25, i486DX-25 & i486DX2-50
Off i486SX-33, i486DX-33, i486DX2-66, P24T
Remaining “W”
Jumper Function Setting
W1 Reserved 1-2
W7 Color Monitor
Mono Monitor
W16 AT Style Keyboard
PS/2 Style Keyboard
Short
Open
Open
Short
W17 Reserved 1-2
W18 Clear RMA in RTC
Short
(may not be present)
Case and Peripheral Connections
Jumper Function Setting
J31 Parallel Port Connector
J33 Serial Port A
J34 Serial Port B
J12 Keyboard Connector
J6/J7 Power Supply Connector
J32 IDE Connector Primary
J31 Floppy Connector
J3 External Battery 1-battery positive; 2-
N/C, 3-GND; 4-GND
J11 Reset Switch 1-GND; 2-GND
J5 Turbo LED 1-Signal; 2-GND
J4 Turbo Switch 1-Signal; 2-GND
J8 Keylock/Power LED 1-Power; 2-N/C; 3-
GND; 4-5V DC
J10 Speaker Connector 1-Speaker; 2-N/C
3-GND; 4-5V DC
J13 External Keyboard 1-Keyb lck, 2-data
3-N/C, 4-GND, 5-<+>
5V
E3/VL; Page 1
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Memory Configuration
Bank 0 Bank 1 Bank 2 Bank 3 Total
4mb 4mb
4mb 4mb 8mb
4mb 4mb 4mb 12mb
4mb 4mb 4mb 4mb 16mb
16mb 16mb
4mb 4mb 16mb 24mb
16mb 16mb 32mb
4mb 16mb 16mb 36mb
4mb 4mb 16mb 16mb 40mb
16mb 16mb 16mb 48mb
16mb 16mb 16mb 16mb 64mb
E3/VL; Page 2
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