==View or Print jumper settings using Fixedsys or New Courier fonts==
MB-1420/1425/1433V rev:1-3 Motherboard
- BIOS ID string ???? <--- please send yours in
- 8-30 pin SIMM slots (1-32meg FPM DRAM)
- 1-8bit ISA slot
- 7-16bit ISA slots
- no L2 CACHE support
- AWARD 1992 Bios
- VLSI Chipset
- Supports 80487SX/80486SX/DX/DX2/Pentium Overdrive
- Clock rates at 20/25/33/50/66MHz
- Manufactured by: BIOSTAR Microtech International Corp
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CONNECTIONS
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Purpose Location Purpose Location
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Speaker J1 Turbo switch J5
Power LED + keylock J2 5v DC ground J6
Turbo LED J3 External battery CN2
Reset switch J4
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USER CONFIGURABLE SETTINGS
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Function Jumper Position
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.Keyboard type select BTC keyboard JP1 Closed
Normal operation JP1 Open
.AT bus clock mode select asynchronous JP2 pins 1 + 2 closed
AT bus clock mode select synchronous JP2 pins 2 + 3 closed
.Monitor type select monochrome JP3 Open
Monitor type select color JP3 Closed
.8042 turbo control pin select pin 30 closed JP4 pins 1 + 2 closed
8042 turbo control pin select pin 23 closed JP4 pins 2 + 3 closed
.CMOS memory normal operation JP5 pins 1 + 2 closed
CMOS memory clear JP5 pins 3 + 4 closed
.On board keyboard fuse disabled JP9 open
On board keyboard fuse enabled JP9 closed
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DRAM CONFIGURATION
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Size Bank 0 Bank 1
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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) 256K x 9 (4) 1M x 9
8MB (4) 1M x 9 (4) 1M x 9
16MB (4) 4M x 9 NONE
17MB (4) 256K x 9 (4) 4M x 9
20MB (4) 1M x 9 (4) 4M x 9
32MB (4) 4M x 9 (4) 4M x 9
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CPU TYPE CONFIGURATION (PQFP CPU INSTALLED)
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Type JP7 JP8 JP14 JP15
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80486SX(PQFP)+upgrade to DX/DX2 1 + 2 2 + 3 1 + 2 1 + 2
80486SX(PQFP)+upgrade to Overdrive open 1 + 2 2 + 3 2 + 3
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CPU TYPE CONFIGURATION (PGA ONLY CPU INSTALLED)
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Type JP7 JP8 JP14 JP15
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80487SX 1-2 2-3 2-3 open
80486DX/DX2 1-2 2-3 1-2 open
Note: The PQFP CPU is optional and may not be present.
If there is no PQF use the above settings.
======================END OF DATA ON MB-1420/1425/1433V========================
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