TEXT View Source
# BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB-8500TAC
Processor Pentium
Processor Speed 75/90/100/120/133/150/166/180MHz
Chip Set Unidentified
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS AMI
Dimensions 275mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports
(2), VRM connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------+-----------+-----------------+-----------|
| Serial port 1 | CN1 | Reset switch | J8 pins |
| | | | 12 & 13 |
|------------------+-----------+-----------------+-----------|
| Parallel port | CN2 | Green PC | J8 pins |
| | | connector | 17 & 18 |
|------------------+-----------+-----------------+-----------|
| Serial port 2 | CN3 | IDE interface | J8 pins |
| | | LED | 20 & 21 |
|------------------+-----------+-----------------+-----------|
| Floppy drive | CN4 | VCC ground | J8 pins |
| interface | | connector | 25 & 26 |
|------------------+-----------+-----------------+-----------|
| IDE interface 2 | CN5 | PS/2 mouse port | J11 |
|------------------+-----------+-----------------+-----------|
| IDE interface 1 | CN6 | Chassis fan | JP19 |
| | | power | |
|------------------+-----------+-----------------+-----------|
| Speaker | J8 pins 1 | 32-bit PCI | PC1 - PC3 |
| | - 4 | slots | |
|------------------+-----------+-----------------+-----------|
| Power LED & | J8 pins 5 | VRM connector | VRM |
| keylock | - 9 | | |
|------------------+-----------+-----------------+-----------|
| Turbo LED | J8 pins | | |
| | 10 & 11 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|---------------------------------------+-------+------------|
| » | Jumper information unavailable | J12 | N/A |
|---+-----------------------------------+-------+------------|
| » | Jumper information unavailable | J13 | N/A |
|---+-----------------------------------+-------+------------|
| » | Jumper information unavailable | J21A | N/A |
|---+-----------------------------------+-------+------------|
| » | Jumper information unavailable | JP2 | N/A |
|---+-----------------------------------+-------+------------|
| » | CMOS memory normal operation | JP4 | Open |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | JP4 | Closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS voltage select 5v | JP5 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS voltage select 12v | JP5 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | EPROM installed | JP5 | Open |
|---+-----------------------------------+-------+------------|
| | Secondary IDE IRQ select IRQ15 | JP8 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Secondary IDE IRQ select IRQ | JP8 | Pins 2 & 3 |
| | through PCI | | closed |
|---+-----------------------------------+-------+------------|
| » | Primary IDE IRQ14 enabled | JP9 | Closed |
|---+-----------------------------------+-------+------------|
| | Primary IDE IRQ14 disabled | JP9 | Open |
|---+-----------------------------------+-------+------------|
| » | Jumper information unavailable | JP12 | N/A |
|---+-----------------------------------+-------+------------|
| » | Jumper information unavailable | JP13 | N/A |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP22 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Jumper information unavailable | JP30 | N/A |
|---+-----------------------------------+-------+------------|
| » | Jumper information unavailable | JP31 | N/A |
|---+-----------------------------------+-------+------------|
| » | Jumper information unavailable | JP32 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | None |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | None |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 66MB | (2) 8M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 66MB | (2) 256K x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 68MB | (2) 8M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 68MB | (2) 512K x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------------+---------------+------------+-----------------|
| 256KB (A) | None | (2) 32K x | None |
| | | 32 | |
|-------------+---------------+------------+-----------------|
| 256KB (B) | (8) 32K x 8 | None | (1) 8K/16K/32K |
| | | | x 8 |
|-------------+---------------+------------+-----------------|
| 512KB (A) | (8) 64K x 8 | None | (1) 16K/32K x 8 |
|-------------+---------------+------------+-----------------|
| 512KB (B) | (8) 64K x 8 | None | (1) 16K x 8 |
|------------------------------------------------------------|
| Note: Board will either have asynchronous or synchronous |
| cache installed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP10 |
|-------------------------------+----------------------------|
| None | Open |
|-------------------------------+----------------------------|
| 256KB (B) (STD/Aster TAG) | Open |
|-------------------------------+----------------------------|
| 512KB (A) (STD TAG) | Pins 1 & 2 closed |
|-------------------------------+----------------------------|
| 512KB (B) (Aster TAG) | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP6 | JP7 | JP15 | JP16 | JP21 |
|----------+----------+----------+---------+---------+-------|
| 75MHz | Open | Open | Open | Open | 1 & 2 |
|----------+----------+----------+---------+---------+-------|
| 90MHz | Open | Closed | Open | Open | 2 & 3 |
|----------+----------+----------+---------+---------+-------|
| 100MHz | Closed | Closed | Open | Open | 2 & 3 |
|----------+----------+----------+---------+---------+-------|
| 120MHz | Open | Closed | Closed | Open | 2 & 3 |
|----------+----------+----------+---------+---------+-------|
| 133MHz | Closed | Closed | Closed | Open | 2 & 3 |
|----------+----------+----------+---------+---------+-------|
| 150MHz | Open | Closed | Closed | Closed | 2 & 3 |
|----------+----------+----------+---------+---------+-------|
| 166MHz | Closed | Closed | Closed | Closed | 2 & 3 |
|----------+----------+----------+---------+---------+-------|
| 180MHz | Open | Closed | Open | Closed | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP20 |
|----------------------------+-------------------------------|
| P54C/CS/CQS/CT | Pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| P55C | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP27 |
|----------------------------+-------------------------------|
| 3.4v | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 3.5v | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 SELECTION |
|------------------------------------------------------------|
| Setting | JP35 | JP36 |
|--------------------+-------------------+-------------------|
| Used as COM2/4 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| Used as IR | Pins 2 & 3 closed | Pins 2 & 3 closed |
| connector | | |
+------------------------------------------------------------+