MITAC INTERNATIONAL CORPORATION =============================== IH4077D Processor 80486SX/CXM7/80486DX/80486DX2/80486DX4/P23N/P24D/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set EFAR Max. 64MB Onboard DRAM Cache 64/128/256KB BIOS Award Dimensions 254mm x 218mm I/O 32-bit VESA local bus slots (2), floppy drive interface, IDE Options interface, parallel port, serial ports (2) NPU None Options +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |-------------------+----------+------------------+----------| | IDE interface | CN1 | Turbo switch | JP45 | |-------------------+----------+------------------+----------| | Floppy drive | CN2 | Reset switch | JP46 | | interface | | | | |-------------------+----------+------------------+----------| | Serial port 2 | J9 | Power LED & | JP49 | | | | keylock | | |-------------------+----------+------------------+----------| | Serial port 1 | J10 | Speaker | JP50 | |-------------------+----------+------------------+----------| | Parallel port | J11 | IDE interface | JP51 | | | | LED | | |-------------------+----------+------------------+----------| | External battery | JP7 | D/D board | JP200 | | | | connector | | |-------------------+----------+------------------+----------| | Turbo LED | JP21 | 32-bit VESA | SL1 & | | | | local bus slots | SL2 | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper | Position | |--------------------------------------+--------+------------| |>> | Factory configured - do not | JP1 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP2 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP3 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | CMOS memory normal operation | JP4 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | CMOS memory clear | JP4 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP5 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP6 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Parallel port IRQ select IRQ7 | JP13 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | Parallel port IRQ select IRQ5 | JP13 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP14 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP15 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP17 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP23 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP33 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP48 | N/A | | | alter | | | |---+----------------------------------+--------+------------| |>> | BIOS type select normal | JP130 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | BIOS type select flash | JP130 | pins 2 & 3 | | | | | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 1MB | (1) 256K x | NONE | NONE | NONE | | | 36 | | | | |------+-------------+-------------+------------+------------| | 2MB | (1) 256K x | (1) 256K x | NONE | NONE | | | 36 | 36 | | | |------+-------------+-------------+------------+------------| | 2MB | (1) 512K x | NONE | NONE | NONE | | | 36 | | | | |------+-------------+-------------+------------+------------| | 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE | | | 36 | 36 | 36 | | |------+-------------+-------------+------------+------------| | 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x | | | 36 | 36 | 36 | 36 | |------+-------------+-------------+------------+------------| | 4MB | (1) 512K x | NONE | (1) 512K x | NONE | | | 36 | | 36 | | |------+-------------+-------------+------------+------------| | 4MB | (1) 1M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 5MB | (1) 256K x | (1) 1M x 36 | NONE | NONE | | | 36 | | | | |------+-------------+-------------+------------+------------| | 6MB | (1) 512K x | NONE | (1) 1M x | NONE | | | 36 | | 36 | | |------+-------------+-------------+------------+------------| | 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 8MB | (1) 2M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 16MB | (1) 2M x 36 | NONE | (1) 2M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 16MB | (1) 4M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 32MB | (1) 8M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 64MB | (1) 8M x 36 | NONE | (1) 8M x | NONE | | | | | 36 | | +------------------------------------------------------------+ +------------------------------------------------------------+ | 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 | |------------------------------------------------------------| | Note: The orientation of the banks is unidentified. | | Bank 0 = U23, 25, 27, & 29. Bank 1 = U24, 26, 28, & | | 30. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | JP8 | JP9 | JP10 | JP11 | JP12 | |-------+--------+--------+--------+------------+------------| | 64KB | Open | Open | Open | pins 1 & 2 | pins 1 & 2 | | | | | | closed | closed | |-------+--------+--------+--------+------------+------------| | 128KB | Closed | Closed | Open | pins 2 & 3 | pins 2 & 3 | | | | | | closed | closed | |-------+--------+--------+--------+------------+------------| | 256KB | Closed | Closed | Closed | pins 1 & 2 | pins 1 & 2 | | | | | | closed | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION | |------------------------------------------------------------| | Type | JP16 | JP18 | JP24 | JP27 | JP28 | JP29 | |--------+--------+--------+--------+--------+-------+-------| |80486SX | Closed | Open | Open | Open |Closed | Open | |--------+--------+--------+--------+--------+-------+-------| | CX M7 | Open | Closed | Closed | Closed | Open |Closed | |--------+--------+--------+--------+--------+-------+-------| |80486DX | Closed | Open | Open | Open |Closed | Open | |--------+--------+--------+--------+--------+-------+-------| |80486DX2| Closed | Open | Open | Open |Closed | Open | |--------+--------+--------+--------+--------+-------+-------| |80486DX4| Closed | Open | Open | Open |Closed | Open | |--------+--------+--------+--------+--------+-------+-------| | P23N | Closed | Open | Open | Open |Closed | Open | |--------+--------+--------+--------+--------+-------+-------| | P24D | Open | Closed | Closed | Open |Closed | Open | |--------+--------+--------+--------+--------+-------+-------| | P24T | Open | Closed | Closed | Open |Closed | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION (CON'T) | |------------------------------------------------------------| | Type | JP34 | JP35 | JP38 | JP39 | JP40 | JP41 | |----------+--------+--------+--------+--------+------+------| | 80486SX | Closed | Closed | Closed | Open | Open | 2 & | | | | | | | | 3 | |----------+--------+--------+--------+--------+------+------| | CX M7 | Open | Open | Open | Closed | 2 & | 1 & | | | | | | | 3 | 2 | |----------+--------+--------+--------+--------+------+------| | 80486DX | Closed | Closed | Closed | Closed | 2 & | 1 & | | | | | | | 3 | 2 | |----------+--------+--------+--------+--------+------+------| | 80486DX2 | Closed | Closed | Closed | Closed | 2 & | 1 & | | | | | | | 3 | 2 | |----------+--------+--------+--------+--------+------+------| | 80486DX4 | Closed | Closed | Closed | Closed | 2 & | 1 & | | | | | | | 3 | 2 | |----------+--------+--------+--------+--------+------+------| | P23N | Closed | Closed | Closed | Closed | 1 & | 1 & | | | | | | | 2 | 2 | |----------+--------+--------+--------+--------+------+------| | P24D | Open | Open | Open | Closed | 2 & | 1 & | | | | | | | 3 | 2 | |----------+--------+--------+--------+--------+------+------| | P24T | Open | Open | Open | Closed | 1 & | 1 & | | | | | | | 2 | 2 | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION (CON'T) | |------------------------------------------------------------| | Type | JP42 | JP43 | JP44 | JP47 | JP110 | |-----------+---------+---------+---------+---------+--------| | 80486SX | 2 & 3 | 2 & 3 | 2 & 3 | Open | Open | |-----------+---------+---------+---------+---------+--------| | CX M7 | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Closed | |-----------+---------+---------+---------+---------+--------| | 80486DX | 2 & 3 | 2 & 3 | 2 & 3 | Open | Open | |-----------+---------+---------+---------+---------+--------| | 80486DX2 | 2 & 3 | 2 & 3 | 2 & 3 | Open | Open | |-----------+---------+---------+---------+---------+--------| | 80486DX4 | 2 & 3 | 2 & 3 | 2 & 3 | Open | Open | |-----------+---------+---------+---------+---------+--------| | P23N | 2 & 3 | 2 & 3 | 2 & 3 | Open | Open | |-----------+---------+---------+---------+---------+--------| | P24D | 2 & 3 | 2 & 3 | 2 & 3 | Closed | Open | |-----------+---------+---------+---------+---------+--------| | P24T | 2 & 3 | 2 & 3 | 2 & 3 | Open | Open | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION (CX M7 ONLY) | |------------------------------------------------------------| | Type | JP25 | |-------------------------------+----------------------------| | CX486DX | Open | |-------------------------------+----------------------------| | CX486DX2 | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | Speed | JP30 | JP31 | JP32 | |---------------+--------------+--------------+--------------| | 25MHz | Closed | Open | Open | |---------------+--------------+--------------+--------------| | 33MHz | Closed | Closed | Closed | |---------------+--------------+--------------+--------------| | 40MHZ | Closed | Closed | Open | |---------------+--------------+--------------+--------------| | 50iMHz | Closed | Open | Open | |---------------+--------------+--------------+--------------| | 50MHz | Open | Open | Closed | |---------------+--------------+--------------+--------------| | 66iMHz | Closed | Closed | Closed | |---------------+--------------+--------------+--------------| | 75iMHz | Closed | Open | Open | |---------------+--------------+--------------+--------------| | 100iMHz | Closed | Closed | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION (80486DX4 ONLY) | |------------------------------------------------------------| | Speed | JP22 | JP26 | |--------------------+-------------------+-------------------| | 1x | N/A | Open | |--------------------+-------------------+-------------------| | 2x | Closed | N/A | |--------------------+-------------------+-------------------| | 2.5x | N/A | N/A | |--------------------+-------------------+-------------------| | 3x | Open | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | VESA WAIT STATE CONFIGURATION | |------------------------------------------------------------| | Wait states | JP37 | |----------------------------+-------------------------------| | 0 wait states | pins 1 & 2 closed | |----------------------------+-------------------------------| | 1 wait state | pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | BUS SPEED CONFIGURATION | |------------------------------------------------------------| | CPU speed | JP36 | |----------------------------+-------------------------------| | <= 33MHz | pins 1 & 2 closed | |----------------------------+-------------------------------| | > 33MHz | pins 2 & 3 closed | +------------------------------------------------------------+