EPOX COMPUTER CO., LTD. ======================= P55-VA Processor CX M1/AM K5/Pentium Processor Speed 75/90/100/120/133/150/166/180/200MHz Chip Set Intel Video Chip Set None Maximum Onboard 128MB (EDO supported) Memory Maximum Video None Memory 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), cache slot, IR connector, USB connector, ATX power connector NPU Options None +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |------------------+----------+------------------+-----------| | ATX power | ATX | Power on | J3 | | connector | | connector | | |------------------+----------+------------------+-----------| | PS/2 mouse port | CN1 | Power LED & | J4 pins 1 | | | | keylock | - 5 | |------------------+----------+------------------+-----------| | Serial port 1 | CN3 | Speaker | J4 pins 7 | | | | | - 10 | |------------------+----------+------------------+-----------| | Parallel port | CN4 | Reset switch | J4 pins | | | | | 12 & 13 | |------------------+----------+------------------+-----------| | Serial port 2 | CN5 | Turbo LED | J4 pins | | | | | 15 & 16 | |------------------+----------+------------------+-----------| | USB connector | CN6 | Green PC | J4 pins | | | | connector | 18 & 19 | |------------------+----------+------------------+-----------| | Floppy drive | CN7 | Green PC LED | J4 pins | | interface | | | 21 & 22 | |------------------+----------+------------------+-----------| | IDE interface 1 | CN8 | IDE interface | J4 pins | | | | LED | 24 & 25 | |------------------+----------+------------------+-----------| | IDE interface 2 | CN9 | 32-bit PCI slots | PC1 - PC4 | |------------------+----------+------------------+-----------| | Chassis fan | J1 | Cache slot | SL1 | | power | | | | |------------------+----------+------------------+-----------| | IR connector | J2 | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Label | Position | |-----------------------------------+-------+----------------| | | Flash BIOS voltage select 12v | JP1 | Pins 2 & 3 | | | | | closed | |---+-------------------------------+-------+----------------| | | Flash BIOS voltage select 5v | JP1 | Pins 1 & 2 | | | | | closed | |---+-------------------------------+-------+----------------| |>> | CMOS memory normal operation | JP5 | Pins 1 & 2 | | | | | closed | |---+-------------------------------+-------+----------------| | | CMOS memory clear | JP5 | Pins 2 & 3 | | | | | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 8MB | (2) 1M x 36 | None | None | None | |------+-------------+-------------+------------+------------| | 8MB | None | None | (1) 1M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 16MB | (2) 1M x 36 | (2) 1M x 36 | None | None | |------+-------------+-------------+------------+------------| | 16MB | (2) 2M x 36 | None | None | None | |------+-------------+-------------+------------+------------| | 16MB | (2) 1M x 36 | None | (1) 1M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 16MB | None | None | (1) 2M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 24MB | (2) 2M x 36 | (2) 1M x 36 | None | None | |------+-------------+-------------+------------+------------| | 24MB | (2) 1M x 36 | None | (1) 2M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 32MB | (2) 2M x 36 | (2) 2M x 36 | None | None | |------+-------------+-------------+------------+------------| | 32MB | (2) 4M x 36 | None | None | None | |------+-------------+-------------+------------+------------| | 32MB | (2) 2M x 36 | None | (1) 2M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 32MB | None | None | (1) 4M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 32MB | (2) 1M x 36 | (2) 1M x 36 | (1) 1M x | (1) 1M x | | | | | 64 | 64 | |------+-------------+-------------+------------+------------| | 40MB | (2) 4M x 36 | (2) 1M x 36 | None | None | |------+-------------+-------------+------------+------------| | 40MB | (2) 4M x 36 | None | (1) 1M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 48MB | (2) 2M x 36 | (2) 4M x 36 | None | None | |------+-------------+-------------+------------+------------| | 48MB | (2) 2M x 36 | None | (1) 4M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 64MB | (2) 4M x 36 | (2) 4M x 36 | None | None | |------+-------------+-------------+------------+------------| | 64MB | (2) 8M x 36 | None | None | None | |------+-------------+-------------+------------+------------| | 64MB | (2) 4M x 36 | None | (1) 4M x | None | | | | | 64 | | |------+-------------+-------------+------------+------------| | 64MB | None | None | (1) 8M x | None | | | | | 64 | | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION (CON'T) | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |-------+-------------+------------+------------+------------| | 72MB | (2) 1M x 36 | (2) 8M x | None | None | | | | 36 | | | |-------+-------------+------------+------------+------------| | 72MB | (2) 1M x 36 | None | (1) 8M x | None | | | | | 64 | | |-------+-------------+------------+------------+------------| | 72MB | (2) 2M x 36 | (2) 2M x | (1) 1M x | (1) 4M x | | | | 36 | 64 | 64 | |-------+-------------+------------+------------+------------| | 80MB | (2) 2M x 36 | (2) 8M x | None | None | | | | 36 | | | |-------+-------------+------------+------------+------------| | 80MB | (2) 2M x 36 | None | (1) 8M x | None | | | | | 64 | | |-------+-------------+------------+------------+------------| | 80MB | (2) 4M x 36 | (2) 4M x | (1) 1M x | (1) 1M x | | | | 36 | 64 | 64 | |-------+-------------+------------+------------+------------| | 96MB | (2) 4M x 36 | (2) 8M x | None | None | | | | 36 | | | |-------+-------------+------------+------------+------------| | 96MB | (2) 4M x 36 | None | (1) 8M x | None | | | | | 64 | | |-------+-------------+------------+------------+------------| | 96MB | (2) 2M x 36 | (2) 2M x | (1) 4M x | (1) 4M x | | | | 36 | 64 | 64 | |-------+-------------+------------+------------+------------| | 104MB | (2) 4M x 36 | (2) 4M x | (1) 1M x | (1) 4M x | | | | 36 | 64 | 64 | |-------+-------------+------------+------------+------------| | 128MB | (2) 8M x 36 | (2) 8M x | None | None | | | | 36 | | | |-------+-------------+------------+------------+------------| | 128MB | (2) 8M x 36 | None | (1) 8M x | None | | | | | 64 | | |-------+-------------+------------+------------+------------| | 128MB | (2) 4M x 36 | (2) 4M x | (1) 4M x | (1) 4M x | | | | 36 | 64 | 64 | |------------------------------------------------------------| | Note: Board accepts EDO memory. Banks are interchangeable. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | SL1 | TAG | |------------+---------------+---------------+---------------| | 256KB | (2) 32K x 32 | Not installed | Unidentified | |------------+---------------+---------------+---------------| | 512KB | (2) 32K x 32 | Installed | Unidentified | |------------+---------------+---------------+---------------| | 512KB | (2) 64K x 32 | Not installed | Unidentified | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED SELECTION (CYRIX) | |------------------------------------------------------------| | CPU speed | Clock speed | Multiplier | JP8 | |-----------+-------------+------------+---------------------| | 120MHz | 50MHz | 2x | Pins 10 & 23 closed | |-----------+-------------+------------+---------------------| | 133MHz | 55MHz | 2x | Pins 13 & 26 closed | |-----------+-------------+------------+---------------------| | 150MHz | 60MHz | 2x | Pins 4 & 17 closed | |-----------+-------------+------------+---------------------| | 166MHz | 66MHz | 2x | Pins 5 & 18 closed | |-----------+-------------+------------+---------------------| | 200MHz | 75MHz | 2x | Pins 12 & 25 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED SELECTION (INTEL) | |------------------------------------------------------------| | CPU speed | Clock speed | Multiplier | JP8 | |------------+-------------+------------+--------------------| | 75MHz | 50MHz | 1.5x | Pins 1 & 14 closed | |------------+-------------+------------+--------------------| | 90MHz | 60MHz | 1.5x | Pins 2 & 15 closed | |------------+-------------+------------+--------------------| | 100MHz | 66MHz | 1.5x | Pins 3 & 16 closed | |------------+-------------+------------+--------------------| | 120MHz | 60MHz | 2x | Pins 4 & 17 closed | |------------+-------------+------------+--------------------| | 133MHz | 66MHz | 2x | Pins 5 & 18 closed | |------------+-------------+------------+--------------------| | 150MHz | 60MHz | 2.5x | Pins 6 & 19 closed | |------------+-------------+------------+--------------------| | 166MHz | 66MHz | 2.5x | Pins 7 & 20 closed | |------------+-------------+------------+--------------------| | 180MHz | 60MHz | 3x | Pins 8 & 21 closed | |------------+-------------+------------+--------------------| | 200MHz | 66MHz | 3x | Pins 9 & 22 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE SELECTION | |------------------------------------------------------------| | Type | JP3A | JP3B | JP3C | |----------+----------------+----------------+---------------| | CX M1 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | | | closed | closed | closed | |----------+----------------+----------------+---------------| | AM K5 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | | | closed | closed | closed | |----------+----------------+----------------+---------------| | P54C/CTB | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | | | closed | closed | closed | |----------+----------------+----------------+---------------| | P55C | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | | | closed | closed | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU VOLTAGE SELECTION | |------------------------------------------------------------| | Voltage | JP4 | |----------------------------+-------------------------------| | | 2.5v | Pins 1 & 2 closed | |---+------------------------+-------------------------------| |>> | 2.8v | Pins 2 & 3 closed | |---+------------------------+-------------------------------| | | 2.9v | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | MISCELLANEOUS TECHNICAL NOTE | |------------------------------------------------------------| | If 200MHz Cyrix chip is installed, do not install the | | COAST module. Also, do not install a PCI 2.0 SCSI | | card. Either of the above cases will cause the | | mainboard to lock up. A PCI 2.1 SCSI card may be | | installed with no problems. | +------------------------------------------------------------+