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# ABIT COMPUTER CORPORATION
PH5 (REV. 1.1)
Processor Pentium
Processor 75/90/100/120/125/133/150/166/180MHz
Speed
Chip Set SIS
Max. Onboard 128MB
DRAM
Cache 256/512KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2), parallel
port, PS/2 mouse port, serial ports (2), VRM
module connector, cache slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+------------------+-----------|
| Serial port 1 | CN2 | Speaker | J15 pins |
| | | | 7 - 10 |
|------------------+----------+------------------+-----------|
| Serial port 2 | CN3 | Turbo LED | J15 pins |
| | | | 12 & 13 |
|------------------+----------+------------------+-----------|
| Floppy drive | CN4 | Turbo switch | J15 pins |
| interface | | | 16 - 18 |
|------------------+----------+------------------+-----------|
| Parallel port | CN5 | Reset switch | J15 pins |
| | | | 19 & 20 |
|------------------+----------+------------------+-----------|
| IDE interface 2 | CN6 | IR connector | JP4 |
|------------------+----------+------------------+-----------|
| IDE interface 1 | CN7 | Green PC | JP5 |
| | | connector | |
|------------------+----------+------------------+-----------|
| PS/2 mouse port | J4 | External battery | JP34 |
|------------------+----------+------------------+-----------|
| VRM module | J12 | Chassis fan | JP37 |
| connector | | power | |
|------------------+----------+------------------+-----------|
| IDE interface | J14 | 32-bit PCI slots | PC1 - PC4 |
| LED | | | |
|------------------+----------+------------------+-----------|
| Power LED & | J15 pins | Cache slot | SL1 |
| keylock | 1 - 5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | On board I/O enabled | JP6 | Open |
|---+----------------------------------+--------+------------|
| | On board I/O disabled | JP6 | Closed |
|---+----------------------------------+--------+------------|
| » | BIOS type select 5v EPROM | JP18 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | BIOS type select 12v flash | JP18 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP30 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP30 | Open |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP33 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP33 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP41 | Open |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 2MB | (2) 256K x 32 | NONE |
|------------------+--------------------+--------------------|
| 2MB | NONE | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 4MB | (2) 256K x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 32 | NONE |
|------------------+--------------------+--------------------|
| 8MB | NONE | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 10MB | (2) 256K x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 32 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 16MB | NONE | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 18MB | (2) 2M x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 18MB | (2) 256K 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 |
|------------------+--------------------+--------------------|
| 32MB | NONE | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 34MB | (2) 4M x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 34MB | (2) 256K x 32 | (2) 4M x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 |
|------------------+--------------------+--------------------|
| 64MB | NONE | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 66MB | (2) 8M x 32 | (2) 256K x 32 |
|------------------+--------------------+--------------------|
| 66MB | (2) 256K x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG | SL1 |
|-----------+-------------+------------------+---------------|
| 256KB (A) | (8) 32K x 8 | (1) 8K or (1)32K | Not installed |
| | | x 8 | |
|-----------+-------------+------------------+---------------|
| 256KB (B) | NONE | NONE | Installed |
|-----------+-------------+------------------+---------------|
| 512KB (A) | (8) 64K x 8 | (1) 16K or (1) | Not installed |
| | | 32K x 8 | |
|-----------+-------------+------------------+---------------|
| 512KB (B) | NONE | NONE | Installed |
|------------------------------------------------------------|
| Note: If SL1 is used, remove all chips from Bank 0 & TAG. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | Type | JP2 | JP3 |
|-----------+----------------------+------------+------------|
| 256KB (A) | Asynchronous | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
|-----------+----------------------+------------+------------|
| 256KB (B) | Burst/pipeline burst | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
|-----------+----------------------+------------+------------|
| 512KB (A) | Asynchronous | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed |
|-----------+----------------------+------------+------------|
| 512KB (B) | Burst/pipeline burst | pins 2 & 3 | pins 1 & 2 |
| | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP15A | JP15C |
|--------+------------------------------+--------------------|
| 75MHz | pins 3 & 4, 5 & 6 closed | Open |
|--------+------------------------------+--------------------|
| 90MHz | pins 1 & 2, 5 & 6 closed | Open |
|--------+------------------------------+--------------------|
| 100MHz | pins 1 & 2, 3 & 4, 5 & 6 | Open |
| | closed | |
|--------+------------------------------+--------------------|
| 120MHz | pins 1 & 2, 5 & 6 closed | pins 1 & 2 closed |
|--------+------------------------------+--------------------|
| 125MHz | pins 3 & 4, 5 & 6 closed | pins 1 & 2, 3 & 4 |
| | | closed |
|--------+------------------------------+--------------------|
| 133MHz | pins 1 & 2, 3 & 4, 5 & 6 | pins 1 & 2 closed |
| | closed | |
|--------+------------------------------+--------------------|
| 150MHz | pins 1 & 2, 5 & 6 closed | pins 1 & 2, 3 & 4 |
| | | closed |
|--------+------------------------------+--------------------|
| 166MHz | pins 1 & 2, 3 & 4, 5 & 6 | pins 1 & 2, 3 & 4 |
| | closed | closed |
|--------+------------------------------+--------------------|
| 180MHz | pins 1 & 2, 5 & 6 closed | pins 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP29 |
|----------------------------+-------------------------------|
| 3.3v | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 3.45v | pins 3 & 4 closed |
|----------------------------+-------------------------------|
| 3.6v | pins 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRM CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP12 |
|---------------+--------------------------------------------|
| Installed | VRM module installed |
|---------------+--------------------------------------------|
| Not installed | pins 7 & 9, 8 & 10, 11 & 13, 12 & 14 |
| | closed |
+------------------------------------------------------------+