ABIT COMPUTER CORPORATION ========================= 486 VESA/486 ISA Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set UNI Max. Onboard DRAM 32MB Cache 64/128/256KB BIOS AMI/Award Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2) +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |---------------+----------+----------------------+----------| | Power LED & | JW1 | Reset switch | JW5 | | keylock | | | | |---------------+----------+----------------------+----------| | Speaker | JW2 | External battery | JP16 | |---------------+----------+----------------------+----------| | Turbo LED | JW3 | 32-bit VESA local | S1 & S2 | | | | bus slots | | |---------------+----------+----------------------+----------| | Turbo switch | JW4 | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper | Position | |--------------------------------------+--------+------------| |>> | Factory configured - do not | JP1 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP2 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP3 | pins 1 & 2 | | | alter | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP9 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP10 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Monitor type select monochrome | JP11 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | Monitor type select color | JP11 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP12 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP14 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | CMOS memory normal operation | JP15 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | CMOS memory clear | JP15 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP17 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP18 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP19 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP20 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP21 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP22 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP23 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP24 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JPX4 | Closed | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JPX5 | Closed | | | alter | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | |------------------+--------------------+--------------------| | 1MB | (4) 256K x 9 | NONE | |------------------+--------------------+--------------------| | 2MB | (4) 256K x 9 | (4) 256K x 9 | |------------------+--------------------+--------------------| | 4MB | (4) 1M x 9 | NONE | |------------------+--------------------+--------------------| | 8MB | (4) 1M x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 16MB | (4) 4M x 9 | NONE | |------------------+--------------------+--------------------| | 32MB | (4) 4M x 9 | (4) 4M x 9 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Size | Max Cachable | Bank 0 | Bank 1 | TAG | |-------+--------------+-------------+-------------+---------| | 64KB | 8MB | (4) 8K x 8 | (4) 8K x 8 | 8K x 8 | |-------+--------------+-------------+-------------+---------| | 128KB | 16MB | (4) 32K x 8 | NONE | 8K x 8 | |-------+--------------+-------------+-------------+---------| | 256KB | 32MB | (4) 32K x 8 | (4) 32K x 8 | 32K x 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | JPX10 | JPX20 | JPX30 | |--------------+---------------+--------------+--------------| | 64KB | Closed | Open | Open | |--------------+---------------+--------------+--------------| | 128KB | Open | Closed | Open | |--------------+---------------+--------------+--------------| | 256KB | Open | Open | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | Speed | JP4 | JP28 | JP29 | JP31 | JP32 | JP33 | |--------+--------+-------+-------+--------+--------+--------| | 25MHz | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Open | Closed | |--------+--------+-------+-------+--------+--------+--------| | 33MHz | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Closed | Open | |--------+--------+-------+-------+--------+--------+--------| | 40MHz | 2 & 3 | 2 & 3 | 2 & 3 | Open | Closed | Closed | |--------+--------+-------+-------+--------+--------+--------| | 50iMHz | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Open | Closed | |--------+--------+-------+-------+--------+--------+--------| | 50MHz | 2 & 3 | 2 & 3 | 2 & 3 | Closed | Open | Closed | |--------+--------+-------+-------+--------+--------+--------| | 66iMHz | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Closed | Open | |------------------------------------------------------------| | NotePins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION | |------------------------------------------------------------| | CPU Type | JP5-JP8, JP25 | JPX1 | JPX2 | JPX3 | |--------------+------------------+--------+--------+--------| | 80486SX | pins 1 & 2 | Open | Closed | Closed | | | closed | | | | |--------------+------------------+--------+--------+--------| | 80487SX | pins 1 & 2 | Open | Open | Closed | | | closed | | | | |--------------+------------------+--------+--------+--------| | 80486DX, DX2 | pins 1 & 2 | Closed | Open | Open | | | closed | | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | VESA WAIT STATE/BUS SPEED CONFIGURATION | |------------------------------------------------------------| | CPU speed | Wait States | JP26 | JP27 | |-----------+---------------+-------------------+------------| | < 33MHz | O wait states | pins 1 & 2 closed | pins 1 & 2 | | | | | closed | |-----------+---------------+-------------------+------------| | > 33MHz | 1 wait state | pins 2 & 3 closed | pins 2 & 3 | | | | | closed | +------------------------------------------------------------+