==View or Print jumper settings using Fixedsys or New Courier fonts==
BIOSTAR MB-1425/33/40/50UCV-B/C/D/E 486 VESA Motherboard
- also known as MB-1425/1433/1440/1450 UCV-B/C/D/E
- AMI BIOS ID string 40-0100-001223-00101111-040493-UMC491F-H ver:D
- AMI BIOS ID string 40-P101-001223-00101111-072594-UMC498-H
- 2-72 pin SIMM slots (1-64meg FPM DRAM)
- 4-30 pin SIMM slots or 8-30 pin SIMM slots
- 3-32bit VESA Local Bus slots
- 6-16bit ISA slots
- 1-8bit XT slot
- 64k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket
- Bioteq 82C3493 / 82C3491 chipset
- Supports 80487SX,80486SX/DX/DX2/DX4 at 25/33/40/50/66/75/100MHz
- Manufactured by: BIOSTAR Microtech International Corp
- Website http://www.bioteq.com/manuals/
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CONNECTIONS
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Purpose Location Purpose Location
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Daughter board connector BC20 Turbo LED JP15 10-11
External battery JP8 Reset switch JP15 12-13
Green PC connect(Ver:D+E) JP14 Turbo switch JP15 14-16
Speaker JP15 1-4 +5v ground JP15 17-18
Power LED + keylock JP15 5-9 32bit VL slots SL1 - SL3
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USER CONFIGURABLE SETTINGS
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Function Jumper Position
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* Password normal operation JP3 Open
Password memory clear JP3 Closed
* CMOS memory normal operation JP8 2 + 3
CMOS memory clear JP8 3 + 4
Battery type select external JP8 Closed
* Power good signal detect from power supply JP11 1 + 2
Power good signal detect from board JP11 2 + 3
* CPU type select PQFP or PGA JP12 1 + 2
CPU type select PGA enabled + PQFP disabled JP12 2 + 3
* Monitor type select color (Ver: B + C only) JP14 2 + 3
Monitor type select monochrome (Ver: B + C only) JP14 1 + 2
* VGA card select normal card JP28 1 + 2
VGA card select Weitek Power 9000 VGA card only JP28 2 + 3
Cyrix CPU type select CX486DX JP34 Open
Cyrix CPU type select CX486DX2 JP34 Closed
* Factory configured - do not alter JP36 Open
* Mouse COM port select COM2 JP39 1 + 2
Mouse COM port select COM1 JP39 2 + 3
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DRAM CONFIGURATION
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Size Bank 0 (30pin) Bank 1 (72pin) Bank 2 (72pin)
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1MB (4) 256K x 9 NONE NONE
2MB (4) 256K x 9 (1) 256K x 36 NONE
3MB (4) 256K x 9 (1) 256K x 36 (1) 256K x 36
4MB (4) 256K x 9 (1) 256K x 36 (1) 512K x 36
5MB (4) 256K x 9 (1) 1M x 36 NONE
6MB (4) 256K x 9 (1) 1M x 36 (1) 256K x 36
8MB (4) 1M x 9 (1) 1M x 36 NONE
10MB (4) 1M x 9 (1) 1M x 36 (1) 512K x 36
12MB (4) 1M x 9 (1) 1M x 36 (1) 1M x 36
16MB (4) 1M x 9 (1) 1M x 36 (1) 2M x 36
20MB (4) 4M x 9 (1) 1M x 36 NONE
24MB (4) 4M x 9 (1) 1M x 36 (1) 1M x 36
32MB (4) 4M x 9 (1) 4M x 36 NONE
36MB (4) 4M x 9 (1) 1M x 36 (1) 4M x 36
48MB (4) 4M x 9 (1) 4M x 36 (1) 4M x 36
64MB (4) 16M x 9 NONE NON
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DRAM CONFIGURATION
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Size Bank 0 (30pin) Bank 1 (30pin)
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1MB (4) 256K x 9 NONE
2MB (4) 256K x 9 (4) 256K x 9
4MB (4) 1M x 9 NONE
5MB (4) 1M x 9 (4) 256K x 9
8MB (4) 1M x 9 (4) 1M x 9
16MB (4) 4M x 9 NONE
17MB (4) 4M x 9 (4) 256K x 9
20MB (4) 4M x 9 (4) 1M x 9
32MB (4) 4M x 9 (4) 4M x 9
64MB (4) 16M x 9 NONE
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CACHE CONFIGURATION
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Size Bank 0 Bank 1 TAG
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32KB (4) 8K x 8 NONE (1) 8K x 8
64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8
128KB (4) 32K x 8 NONE (1) 8K x 8
256KB (4) 32K x 8 (4) 32K x 8 (1) 16K x 8
256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8
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CACHE JUMPER CONFIGURATION
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Size JP5 JP6 JP7 JP9 JP10
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32KB 2 + 3 Open Open Open Open
64KB 1 + 2 Open Open Closed Open
128KB 2 + 3 2 + 3 Closed Closed Open
256KB 1 + 2 1 + 2 Closed Closed 2 + 3
256KB 1 + 2 1 + 2 Closed Closed 1 + 2
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CPU TYPE CONFIGURATION
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Type JP16 JP17
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CX486S Open pins 2 + 3
80486SX Open pins 2 + 3
ODP486SX pins 2 + 3 pins 1 + 2, 3 + 4
80487SX pins 2 + 3 pins 1 + 2, 3 + 4
80486DX pins 1 + 2 pins 1 + 2, 3 + 4
80486DX2 pins 1 + 2 pins 1 + 2, 3 + 4
80486DX4 pins 1 + 2 pins 1 + 2, 3 + 4
Pentium Overdrive pins 1 + 2 pins 1 + 2, 3 + 4
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CPU SPEED CONFIGURATION
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Speed JP21 JP22 JP23 JP27
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25MHZ Closed Open Closed Open
33MHz Closed Closed Open Open
4OMHz Open Open Closed Closed
50iMHz Closed Open Closed Open
5OMHz Open Closed Open Closed
66iMHz Closed Closed Open Open
75iMHz Closed Open Closed Open
1OOiMHz Closed Closed Open Open
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CPU SPEED CONFIGURATION (80488DX4 ONLY)
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Speed JP41
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2x pins 2 + 3 closed
3x pins 1 + 2 closed
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CPU VOLTAGE CONFIGURATION
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voltage JP42 JP44
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3.3v Open Open
5v pins 3 + 5, 4 + 6 pins 1 + 2, 3 + 4
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VESA BUS CLOCK CONFIGURATION (SLOT 1)
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setting JP26
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Synchronous pins 1 + 2 closed
Asynchronous pins 2 + 3 closed
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VESA BUS CLOCK CONFIGURATION (SLOT 2)
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Setting JP25
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Synchronous pins 1 + 2 closed
Asynchronous pins 2 + 3 closed
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VESA BUS CLOCK CONFIGURATION (SLOT 3)
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Softing JP29
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Synchronous pins 1 + 2 closed
Asynchronous pins 2 + 3 closed
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VGA CARD CONFIGURATION (CIRRUS LOGIC VER. AB)
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CPU speed JP19 JP20
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25MHz pins 2 + 3 closed pins 1 + 2 closed
33MHz pins 2 + 3 closed pins 1 + 2 closed
40MHz pins 1 + 2 closed pins 1 + 2 closed
50MHz pins 1 + 2 closed pins 1 + 2 closed
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VGA CARD CONFIGURATION (CIRRUS LOGIC VER. AC)
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CPU speed JP19 JP20
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25MHz pins 2 + 3 closed pins 1 + 2 closed
33MHz pins 2 + 3 closed pins 1 + 2 closed
40MHz pins 1 + 2 closed pins 2 + 3 closed
50MHz pins 1 + 2 closed pins 2 + 3 closed
=================END OF MB-1425/33/40/50UCV-B/C/D/E DATA===================
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