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# ABIT COMPUTER CORPORATION
PT5 R2 PCI
Processor CX6X86/AM K5/Pentium
Processor 75/90/100/120/133/150/166/180/200MHz
Speed
Chip Set Intel
Max. Onboard 128MB
DRAM
Cache 256/512KB
BIOS Award
Dimensions 330mm x 218mm
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), cache
slot, IR connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN1 | IDE interface | JP21 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN2 | Speaker | JW1 |
|-------------------+----------+------------------+----------|
| Parallel port | CN3 | Reset switch | JW2 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN4 | Turbo switch | JW3 |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN5 | Power LED & | JW4 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | Turbo LED | JW5 |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN7 | 32-bit PCI slots | PC1 - |
| | | | PC3 |
|-------------------+----------+------------------+----------|
| IR connector | JP2 | Cache slot | SL1 |
|-------------------+----------+------------------+----------|
| Green PC | JP12 | | |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| » | Factory configured - do not alter | J1 | Open |
|---+-----------------------------------+---------+----------|
| » | On board I/O enabled | JP4 | Open |
|---+-----------------------------------+---------+----------|
| | On board I/O disabled | JP4 | Closed |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JP5 | Open |
|---+-----------------------------------+---------+----------|
| » | CMOS memory normal operation | JP10 | Open |
|---+-----------------------------------+---------+----------|
| | CMOS memory clear | JP10 | Closed |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JP16 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 32 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (2) 512K x 32 | (2) 512K x 32 |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 10MB | (2) 256K x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 12MB | (2) 1M x 32 | (2) 512K x 32 |
|------------------+--------------------+--------------------|
| 12MB | (2) 512K x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 32 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 18MB | (2) 2M x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 18MB | (2) 256K x 32 | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 20MB | (2) 2M x 32 | (2) 512K x 32 |
|------------------+--------------------+--------------------|
| 20MB | (2) 512K x 32 | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 32 | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 32 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 32 | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 34MB | (2) 4M x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 34MB | (2) 256K x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 36MB | (2) 4M x 32 | (2) 512K x 32 |
|------------------+--------------------+--------------------|
| 36MB | (2) 512K x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 32 | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 32 | NONE |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 66MB | (2) 8M x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 66MB | (2) 256K x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 68MB | (2) 8M x 32 | (2) 512K x 32 |
|------------------+--------------------+--------------------|
| 68MB | (2) 512K x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 32 | (2) 8M x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 32 | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 32 | (2) 8M x 32 |
|------------------------------------------------------------|
| Note: This board supports fast page and EDO DRAM. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | CA1 & CA2 | SL1 |
|------------------+--------------------+--------------------|
| 256KB | (2) 32K x 32 | Not installed |
|------------------+--------------------+--------------------|
| 512KB | (2) 32K x 32 | Installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | DS/1 |
|------------------------------+-----------------------------|
| 256KB | Off |
|------------------------------+-----------------------------|
| 512KB | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J2 |
|-----------------------------+------------------------------|
| Cyrix | Closed |
|-----------------------------+------------------------------|
| Intel | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (CYRIX) |
|------------------------------------------------------------|
| Speed | DS/2 | DS/3 | DS/4 | DS/5 | DS/6 |
|----------+---------+---------+---------+---------+---------|
| 120MHz | Off | On | On | Off | Off |
|----------+---------+---------+---------+---------+---------|
| 133MHz | On | Off | Off | Off | Off |
|----------+---------+---------+---------+---------+---------|
| 150MHz | On | On | Off | Off | Off |
|----------+---------+---------+---------+---------+---------|
| 166MHz | On | Off | On | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (AMD) |
|------------------------------------------------------------|
| Speed | Ext clock | DS/2 | DS/3 | DS/4 | DS/5 | DS/6 |
|--------+-----------+-------+-------+-------+-------+-------|
| 75MHz | 50MHz | Off | On | On | Off | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 75MHz | 66MHz | On | Off | On | On | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 90MHz | 55MHz | On | Off | Off | Off | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 90MHz | 60MHz | On | On | Off | Off | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 100MHz | 66MHz | On | Off | On | Off | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 100MHz | 55MHz | On | Off | Off | Off | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 100MHz | 50MHz | Off | On | On | Off | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 120MHz | 60MHz | On | On | Off | Off | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 133MHz | 66MHz | On | Off | On | Off | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 150MHz | 60MHz | On | On | Off | On | Off |
|--------+-----------+-------+-------+-------+-------+-------|
| 166MHz | 66MHz | On | Off | On | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (INTEL) |
|------------------------------------------------------------|
| Speed | DS/2 | DS/3 | DS/4 | DS/5 | DS/6 |
|----------+---------+---------+---------+---------+---------|
| 75MHz | Off | On | On | Off | Off |
|----------+---------+---------+---------+---------+---------|
| 90MHz | On | On | Off | Off | Off |
|----------+---------+---------+---------+---------+---------|
| 100MHz | On | Off | On | Off | Off |
|----------+---------+---------+---------+---------+---------|
| 120MHz | On | On | Off | On | Off |
|----------+---------+---------+---------+---------+---------|
| 133MHz | On | Off | On | On | Off |
|----------+---------+---------+---------+---------+---------|
| 150MHz | On | On | Off | On | On |
|----------+---------+---------+---------+---------+---------|
| 166MHz | On | Off | On | On | On |
|----------+---------+---------+---------+---------+---------|
| 180MHz | On | On | Off | Off | On |
|----------+---------+---------+---------+---------+---------|
| 200MHz | On | Off | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP20 |
|----------------------------+-------------------------------|
| | 3.3v | pins 3 & 6 closed |
|---+------------------------+-------------------------------|
| » | 3.45v | pins 2 & 5 closed |
|---+------------------------+-------------------------------|
| | 3.6v | pins 1 & 4 closed |
+------------------------------------------------------------+