ABIT COMPUTER CORPORATION ========================= AN4 Processor 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set SIS Max. Onboard 64MB DRAM Cache 128/256/512KB BIOS AMI/Award Dimensions 260mm x 220mm I/O Options 32-bit VESA local bus slots (3), green PC feature NPU Options None +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |--------------------+----------+-----------------+----------| | External battery | J1 | Reset switch | JW3 | |--------------------+----------+-----------------+----------| | Green PC monitor | JP8 | Turbo switch | JW4 | | AC connector | | | | |--------------------+----------+-----------------+----------| | Power LED & | JW1 | Turbo LED | JW5 | | keylock | | | | |--------------------+----------+-----------------+----------| | Speaker | JW2 | 32-bit VESA | SL1 - | | | | Local bus slots | SL3 | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper | Position | |-------------------------------------+---------+------------| |>> | Factory configured - do not | JP9 | Closed | | | alter | | | |---+---------------------------------+---------+------------| |>> | CMOS memory normal operation | JP10 | pins 1 & 2 | | | | | closed | |---+---------------------------------+---------+------------| | | CMOS memory clear | JP10 | pins 2 & 3 | | | | | closed | |---+---------------------------------+---------+------------| |>> | Green PC enabled | JP13 | Closed | |---+---------------------------------+---------+------------| | | Green PC disabled | JP13 | Open | |---+---------------------------------+---------+------------| |>> | Factory configured - do not | JP19 | Open | | | alter | | | |---+---------------------------------+---------+------------| |>> | Factory configured - do not | JP36 | Closed | | | alter | | | |------------------------------------------------------------| | Note: The location of the factory configured jumpers is | | unidentified. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 1MB | (4) 256K x | NONE | NONE | NONE | | | 9 | | | | |------+-------------+-------------+------------+------------| | 1MB | (1) 256K x | NONE | NONE | NONE | | | 36 | | | | |------+-------------+-------------+------------+------------| | 2MB | (4) 256K x | (4) 256K x | NONE | NONE | | | 9 | 9 | | | |------+-------------+-------------+------------+------------| | 2MB | (1) 256K x | (1) 256K x | NONE | NONE | | | 36 | 36 | | | |------+-------------+-------------+------------+------------| | 4MB | (4) 1M x 9 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 4MB | (1) 1M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 6MB | (1) 256K x | (1) 256K x | (4) 1M x 9 | NONE | | | 36 | 36 | | | |------+-------------+-------------+------------+------------| | 6MB | (4) 1M x 9 | (1) 256K x | (1) 256K x | NONE | | | | 36 | 36 | | |------+-------------+-------------+------------+------------| | 8MB | (1) 2M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE | |------+-------------+-------------+------------+------------| | 10MB | (4) 256K x | (4) 256K x | (1) 1M x | (1) 1M x | | | 9 | 9 | 36 | 36 | |------+-------------+-------------+------------+------------| | 10MB | (1) 1M x 36 | (1) 1M x 36 | (4) 256K x | (4) 256K x | | | | | 9 | 9 | |------+-------------+-------------+------------+------------| | 12MB | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 16MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x | (1) 1M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 16MB | (1) 4M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 16MB | (4) 4M x 9 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 18MB | (4) 256K x | (4) 256K x | (1) 4M x | NONE | | | 9 | 9 | 36 | | |------+-------------+-------------+------------+------------| | 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 24MB | (4) 1M x 9 | (4) 1M x 9 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE | |------+-------------+-------------+------------+------------| | 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 36MB | (4) 4M x 9 | (4) 4M x 9 | (1) 1M x | NONE | | | | | 36 | | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 40MB | (4) 4M x 9 | (4) 4M x 9 | (1) 2M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 48MB | (4) 4M x 9 | (4) 4M x 9 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM JUMPER CONFIGURATION | |------------------------------------------------------------| | Bank 0 | Bank 1 | Bank 2 | Bank 3 | JP39 | JP40 | JP41 | |--------+--------+--------+--------+-------+-------+--------| | SIMM 1 | SIMM 5 | SIMM 9 | SIMM | 1 & 2 | 1 & 2 | Open | | - 4 | - 8 | (S) | 10 (S) | | | | |--------+--------+--------+--------+-------+-------+--------| | SIMM 1 | SIMM 5 | SIMM 9 | SIMM | 1 & 2 | 1 & 2 | Open | | - 4 | - 8 | (D) | 10 (D) | | | | |--------+--------+--------+--------+-------+-------+--------| | SIMM 9 | SIMM | SIMM 1 | SIMM 5 | 2 & 3 | 2 & 3 | Open | | (S) | 10 (S) | - 4 | - 8 | | | | |--------+--------+--------+--------+-------+-------+--------| | SIMM 9 | SIMM | SIMM 1 | SIMM 5 | 2 & 3 | 2 & 3 | Open | | (D) | 10 (D) | - 4 | - 8 | | | | |--------+--------+--------+--------+-------+-------+--------| | SIMM 9 | SIMM 9 | SIMM | SIMM | 2 & 3 | 2 & 3 | Closed | | (D) | (D) | 10 (D) | 10 (D) | | | | |--------+--------+--------+--------+-------+-------+--------| | SIMM 9 | SIMM 5 | SIMM 1 | NONE | 2 & 3 | 1 & 2 | Open | | (S) | - 8 | - 4 | | | | | |--------+--------+--------+--------+-------+-------+--------| | SIMM 1 | SIMM | SIMM 9 | NONE | 1 & 2 | Open | Open | | - 4 | 10 (S) | (S) | | | | | |--------+--------+--------+--------+-------+-------+--------| | SIMM 1 | SIMM | SIMM 9 | SIMM 9 | 1 & 2 | Open | Open | | - 4 | 10 (S) | (D) | (D) | | | | |--------+--------+--------+--------+-------+-------+--------| | SIMM 9 | SIMM 9 | SIMM | SIMM 5 | Open | 2 & 3 | Closed | | (D) | (D) | 10 (S) | - 8 | | | | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM JUMPER CONFIGURATION (CON'T) | |------------------------------------------------------------| | Bank 0 | Bank 1 | Bank 2 | Bank 3 | JP42 | JP43 | JP44 | |---------+--------+--------+--------+-------+-------+-------| | SIMM 1 | SIMM 5 | SIMM 9 | SIMM | 1 & 2 | 1 & 2 | 1 & 2 | | - 4 | - 8 | (S) | 10 (S) | | | | |---------+--------+--------+--------+-------+-------+-------| | SIMM 1 | SIMM 5 | SIMM 9 | SIMM | 1 & 2 | 1 & 2 | 1 & 2 | | - 4 | - 8 | (D) | 10 (D) | | | | |---------+--------+--------+--------+-------+-------+-------| | SIMM 9 | SIMM | SIMM 1 | SIMM 5 | 2 & 3 | 1 & 2 | 2 & 3 | | (S) | 10 (S) | - 4 | - 8 | | | | |---------+--------+--------+--------+-------+-------+-------| | SIMM 9 | SIMM | SIMM 1 | SIMM 5 | 2 & 3 | 2 & 3 | 1 & 2 | | (D) | 10 (D) | - 4 | - 8 | | | | |---------+--------+--------+--------+-------+-------+-------| | SIMM 9 | SIMM 9 | SIMM | SIMM | 2 & 3 | 2 & 3 | Open | | (D) | (D) | 10 (D) | 10 (D) | | | | |---------+--------+--------+--------+-------+-------+-------| | SIMM 9 | SIMM 5 | SIMM 1 | NONE | 2 & 3 | Open | Open | | (S) | - 8 | - 4 | | | | | |---------+--------+--------+--------+-------+-------+-------| | SIMM 1 | SIMM | SIMM 9 | NONE | 1 & 2 | 1 & 2 | 2 & 3 | | - 4 | 10 (S) | (S) | | | | | |---------+--------+--------+--------+-------+-------+-------| | SIMM 1 | SIMM | SIMM 9 | SIMM 9 | 1 & 2 | 1 & 2 | 2 & 3 | | - 4 | 10 (S) | (D) | (D) | | | | |---------+--------+--------+--------+-------+-------+-------| | SIMM 9 | SIMM 9 | SIMM | SIMM 5 | 2 & 3 | 2 & 3 | Open | | (D) | (D) | 10 (S) | - 8 | | | | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | TAG | |------------+---------------+---------------+---------------| | 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | |------------+---------------+---------------+---------------| | 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 | |------------+---------------+---------------+---------------| | 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | JP1 | JP2 | JP3` | JP20 | JP21 | JP38 | |--------+--------+--------+--------+--------+-------+-------| | 128KB | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | |--------+--------+--------+--------+--------+-------+-------| | 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | |--------+--------+--------+--------+--------+-------+-------| | 512KB | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION | |------------------------------------------------------------| | Type | JP15 | JP16 | JP18 | |-------------+------------------+------------------+--------| | 80486SX | pins 2 & 3 | Open | Open | | | closed | | | |-------------+------------------+------------------+--------| | 80487SX | pins 1 & 2 | pins 2 & 3 | Closed | | | closed | closed | | |-------------+------------------+------------------+--------| | 80486DX/DX2 | pins 1 & 2 | pins 1 & 2 | Closed | | | closed | closed | | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | Speed | JP11 | JP12 | JP14 | |---------------+--------------+--------------+--------------| | 25MHz | Open | Closed | Closed | |---------------+--------------+--------------+--------------| | 33MHz | Closed | Closed | Open | |---------------+--------------+--------------+--------------| | 40MHz | Open | Open | Closed | |---------------+--------------+--------------+--------------| | 50iMHz | Open | Closed | Closed | |---------------+--------------+--------------+--------------| | 50MHz | Closed | Open | Open | |---------------+--------------+--------------+--------------| | 66iMHz | Closed | Closed | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | VESA WAIT STATE CONFIGURATION | |------------------------------------------------------------| | Wait states | JP4 | |----------------------------+-------------------------------| | 0 wait states | pins 1 & 2 closed | |----------------------------+-------------------------------| | 1 wait state | pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | VESA BUS SPEED CONFIGURATION | |------------------------------------------------------------| | CPU speed | JP5 | |----------------------------+-------------------------------| | < = 33MHz | pins 1 & 2 closed | |----------------------------+-------------------------------| | > 33MHz | pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | GREEN PC CONFIGURATION | |------------------------------------------------------------| | Description | JP8 | |-------------------------------+----------------------------| | Signal | pin 1 | |-------------------------------+----------------------------| | Ground | pin 2 | +------------------------------------------------------------+