Thread: MB-1425/33/40/50UIV Motherboard User Manual

- also known as MB-1425/1433/1440/1450 UIV
- AMI BIOS ID string 40-P101-001223-00101111-072594-UMC498-H
- AMI BIOS ID string 40-P301-001223-00101111-072594-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
- 7-16bit ISA slots
- 64k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket
- AMI 1994 Bios
- UMC UM8494/8496 Chipset (thanks Roger)
- Supports 3.45v/5volt CPU's
- 237pin ZIF CPU socket which supports these processors:
INTEL 80486SX,80486DX/DX2/DX4,P24D, Pentium Overdrive
CYRIX CX486S(M6),CX486DX(M7)
AMD AM486DX,AM486DXL,AM486DX2-66/80
- Supports speeds of 25/33/40/50/66/75/100(internal)MHz.
- Manufactured by: BIOSTAR Microtech International Corp


==View or Print jumper settings using Fixedsys or New Courier fonts==

BIOSTAR MB-1425/33/40/50UIV 486 VESA Motherboard

- AMI BIOS ID string 40-P101-001223-00101111-072594-UMC498-H
- AMI BIOS ID string 40-P301-001223-00101111-072594-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
- 7-16bit ISA slots
- 64k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket
- AMI Bios
- UMC UM8494/8496 Chipset (thanks Roger)
- Supports 3.45v/5volt CPU's
- 237pin ZIF CPU socket which supports these processors:
INTEL 80486SX,80486DX/DX2/DX4,P24D, Pentium Overdrive
CYRIX CX486S(M6),CX486DX(M7)
AMD AM486DX,AM486DXL,AM486DX2-66/80
- Supports speeds of 25/33/40/50/66/75/100(internal)MHz.
- Manufactured by: BIOSTAR Microtech International Corp

------------------------------------------------------------------------
CONNECTIONS
------------------------------------------------------------------------
Purpose Location Purpose Location
------------------------------------------------------------------------
External battery JP8 Turbo switch JP15 (14-16)
Speaker JP15 (1-4) +5v ground JP15 (17-18)
Power LED + keylock JP15 (5-9) Green PC connector JP24
Turbo LED JP15 (10-11) Green PC connector JP25
Reset switch JP15 (12-13) 32-bit VESA slots SL1 - SL3
------------------------------------------------------------------------
USER CONFIGURABLE SETTINGS
------------------------------------------------------------------------
Function Jumper Position
------------------------------------------------------------------------
* CMOS memory normal operation JP8 2 + 3
CMOS memory clear JP8 3 + 4
Battery type select external JP8 pin1 + / pin4 -
* Factory configured - do not alter JP31 Open
* Factory configured - do not alter JP32 Open
* VESA bus clock type select synchronous JP36 1 + 2
VESA bus clock type select asynchronous JP36 2 + 3
------------------------------------------------------------------------
Motherboard Revision and Pin Existence
------------------------------------------------------------------------
Version JP20 JP23 JP40 Remark
------------------------------------------------------------------------
1 No No No
2 No No No
3 No Yes No Support AMD 3V CPU
5 Yes (2 Pin) No No Support AMD 3V CPU
6 Yes (2 Pin) No No Support AMD 3V + Cyrix 4V CPU
7 Yes (3 Pin) No Yes Above + AMD Enhanced CPU
------------------------------------------------------------------------
DRAM CONFIGURATION
------------------------------------------------------------------------
Size Bank 0/2 Bank 1/3 Bank 2
------------------------------------------------------------------------
1MB (1) 256Kx36 NONE NONE
1MB NONE (1) 256Kx36 NONE
1MB NONE NONE (4) 256Kx9
2MB (1) 25Kx36 NONE (4) 256Kx9
2MB NONE (1) 256Kx36 (4) 256Kx9
2MB (1) 256Kx36 (1) 256Kx36 NONE
2MB (1) 512Kx36 NONE NONE
2MB NONE (1) 512Kx36 NONE
3MB (1) 256Kx36 (1) 256Kx36 (4) 256Kx9
3MB NONE (1) 512Kx36 (4) 256Kx9
3MB (1) 256Kx36 (1) 512Kx36 (4) 256Kx9
3MB (1) 512Kx36 (1) 256Kx36 NONE
4MB (1) 256Kx36 (1) 512Kx36 (4) 256Kx9
4MB NONE NONE (4) 1Mx9
4MB (1) 512Kx36 (1) 512Kx36 NONE
4MB (1) 1Mx36 NONE NONE
4MB NONE (1) 1Mx36 NONE
5MB (1) 1Mx36 NONE (4) 256Kx9
5MB NONE (1) 1Mx36 (4) 256Kx9
5MB (1) 256Kx36 NONE (4) 1Mx9
5MB NONE (1) 256Kx36 (4) 1Mx9
5MB (1) 256Kx36 (1) 1Mx36 NONE
5MB (1) 1Mx36 (1) 256Kx36 NONE
6MB NONE (1) 512Kx36 (4) 1Mx9
6MB (1) 1Mx36 (1) 512Kx36 NONE
6MB (1) 512Kx36 (1) 1Mx36 NONE
7MB (1) 1Mx36 (1) 512Kx36 (4) 256Kx9
7MB (1) 256Kx36 (1) 512Kx36 (4) 1Mx9
8MB (1) 1Mx36 NONE (4) 1Mx9
8MB NONE (1) 1Mx36 (4) 1Mx9
8MB (1) 1Mx36 (1) 1mx36 NONE
8MB (1) 2Mx36 NONE NONE
8MB NONE (1) 2Mx36 NONE
9MB (1) 1Mx36 (1) 1Mx36 (4) 256Kx9
9MB (1) 1mx36 (1) 256Kx36 (4) 1Mx9
9MB (1) 256Kx36 (1) 1Mx36 (4) 1Mx9
10MB (1) 1Mx36 (1) 512Kx36 (4) 1Mx9
12MB (1) 1mx36 (1) 1Mx36 (4) 1Mx9
12MB NONE (1) 2Mx36 (4) 4Mx9
12MB (1) 1Mx36 (1) 2Mx36 NONE
12MB (1) 2Mx36 (1) 1Mx36 NONE
16MB NONE NONE (4) 4Mx9
16MB (1) 4Mx36 NONE NONE
16MB NONE (1) 4Mx36 NONE
17MB (1) 4Mx36 NONE (4) 256Kx9
17MB NONE (1) 4Mx36 (4) 256Kx9
17MB (1) 256Kx36 NONE (4) 4Mx9
17MB NONE (1) 256Kx36 (4) 4Mx9
18MB (1) 256Kx36 (1) 4Mx36 (4) 256Kx9
18MB (1) 4Mx36 (1) 256Kx36 (4) 256Kx9
19MB (1) 4Mx36 (1) 2Mx36 (4) 256Kx9
20MB (1) 4Mx36 (1) 1Mx36 (4) 1Mx9
20MB NONE NONE (4) 1mx9
20MB (1) 1Mx36 (1) 4Mx36 (4) 4mx9
20MB NONE NONE (4) 4mx9
21MB (1) 1Mx36 (1) 4Mx36 (4) 256Kx9
21MB (1) 4Mx36 (1) 1Mx36 (4) 256Kx9
24MB (1) 1mx36 (1) 4Mx36 (4) 1Mx9
24MB (1) 4Mx36 (1) 1Mx36 (4) 1Mx9
32MB (1) 4Mx36 NONE (4) 4Mx9
32MB NONE (1) 4Mx36 (4) 4Mx9
32MB (1) 4Mx36 (1) 4Mx36 NONE
32MB (1) 8Mx36 NONE NONE
32MB NONE (1) 8Mx36 NONE
33MB (1) 8Mx36 NONE (4) 256Kx9
33MB NONE (1) 8Mx36 (4) 256Kx9
33MB (1) 4Mx36 (1) 4Mx36 (4) 256Kx9
33MB (1) 4Mx36 (1) 256Kx36 (4) 4Mx9
33MB (1) 256Kx36 (1) 4Mx36 (4) 4Mx9
34MB (1) 4Mx36 (1) 512Kx36 (4) 4Mx9
36MB (1) 4Mx36 (1) 1mx36 (4) 4Mx9
36MB (1) 1Mx36 (1) 4Mx36 (4) 4Mx9
36MB NONE (1) 8Mx36 (4) 1Mx9
36MB (1) 4Mx36 (1) 4Mx36 (4) 1Mx9
48MB (1) 4Mx36 (1) 4Mx36 (4) 4mx9
48MB NONE (1) 8Mx36 (4) 4Mx9
48MB (1) 4Mx36 (1) 8Mx36 NONE
48MB (1) 8Mx36 (1) 4Mx36 NONE
64MB (1) 8mx36 (1) 8Mx36 NONE
------------------------------------------------------------------------

CACHE CONFIGURATION
------------------------------------------------------------------------
Size Bank 0 Bank 1 TAG
------------------------------------------------------------------------
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) 32K x 8
256KB (4) 64K x 8 NONE (1) 32K x 8
------------------------------------------------------------------------
CACHE JUMPER CONFIGURATION
------------------------------------------------------------------------
Size JP7 JP9 JP10 JP33
------------------------------------------------------------------------
64KB Open Open 2+3 Open
128KB Open 1+2 1+2 Closed
256KB Closed 1+2,3+4 1+2 Closed
256KB Closed 2+3 2+3 Closed
------------------------------------------------------------------------
CPU TYPE CONFIGURATION
------------------------------------------------------------------------
Type JP11 JP12 JP13
------------------------------------------------------------------------
CX486M6 1+2,3+4,5+6 1+2,3+4,5+6 2+3
UMC486 2+3 2+3 2+3
80486SX Open 2+3 2+3
CX486M7 1+2,3+4,5+6 1+2,3+4,5+6 1+2,3+4
AMD486DXL 2+3 2+3 1+2,3+4
SL80486DX 1+2 1+2 1+2,3+4
SL80486DX2 1+2 1+2 1+2,3+4
80486DX Open 2+3 1+2,3+4
80486DX2 Open 2+3 1+2,3+4
80486DX4 1+2 1+2 1+2,3+4
P24D 1+2,4+5 1+2,4+5 1+2,3+4
Pentium Overdrive 1+2 1+2 1+2,3+4
------------------------------------------------------------------------
CPU TYPE CONFIGURATION (CON'T)
------------------------------------------------------------------------
Type JP17 JP18 JP19 JP35
------------------------------------------------------------------------
CX486M6 Open 2+3,4+5 2+3,4+5 Open
UMC486 3+4 1+2 Open Closed
80486SX Open Open Open Closed
CX486M7 1+2 2+3,4+5 2+3 Open
AMD486DXL 1+2,3+4 1+2 Open Closed
SL80486DX 1+2 5+6 1+2,3+4 Open
SL80486DX2 1+2 5+6 1+2,3+4 Open
80486DX 1+2 Open Open Closed
80486DX2 1+2 open Open Closed
80486DX4 1+2 5+6 1+2,3+4 Open
P24D 1+2 3+4,5+6 1+2,3+4 Open
Pentium Overdrive 2+3 5+6 1+2,3+4 Open
------------------------------------------------------------------------
CPU TYPE CONFIGURATION
------------------------------------------------------------------------
Type JP20 JP23
------------------------------------------------------------------------
All CPU Open Open
AM80486DX2-66/80 only Closed Closed
------------------------------------------------------------------------
CPU SPEED CONFIGURATION
------------------------------------------------------------------------
Speed JP4 JP5 JP6
------------------------------------------------------------------------
25MHz Open Open Closed
33MHz Closed Closed Closed
40MHz Open Closed Closed
50iMHz Open Open Closed
50MHz Closed Open Open
66iMHz Closed Closed Closed
75iMHz Open Open Closed
100iMHz Closed Closed Closed
------------------------------------------------------------------------
CPU VOLTAGE CONFIGURATION
------------------------------------------------------------------------
Voltage JP14 JP16 JP27
------------------------------------------------------------------------
3.45v 1 + 2 1 + 2 1 + 2
5v 2 + 3 2 + 3 2 + 3
------------------------------------------------------------------------
VESA WAIT STATE CONFIGURATION
------------------------------------------------------------------------
Wait states JP22
------------------------------------------------------------------------
0 wait states Open
1 wait state Closed
------------------------------------------------------------------------
BUS SPEED CONFIGURATION
------------------------------------------------------------------------
CPU speed JP21
------------------------------------------------------------------------
<= 33MHz Open
> 33MHz Closed
==============END OF DATA ON MB-1425/1433/1440/1450UIV==================