ABIT COMPUTER CORPORATION ========================= 486 VESA AG4 Processor CX486SX/80486SX/80487SX/CX486DX/80486DX/80486DX2/Pentium Overdrive Processor 20/25/33/40(internal)/50(internal)/50/66(internal)/75(internal)/83(internal)/ Speed 100(internal)MHz Chip Set SIS Max. 128MB Onboard DRAM Cache 128/256/512KB BIOS AMI/Award Dimensions 260mm x 220mm I/O 32-bit VESA local bus slots (3), green PC connector Options NPU None Options +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |------------------+----------+-------------------+----------| | External battery | J1 | Reset switch | J6 | |------------------+----------+-------------------+----------| | Turbo switch | J3 | Power LED & | J7 | | | | keylock | | |------------------+----------+-------------------+----------| | Turbo LED | J4 | Green PC | JP45 | | | | connector | | |------------------+----------+-------------------+----------| | Speaker | J5 | 32-bit VESA Local | SL1 - | | | | bus slots | SL3 | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper | Position | |--------------------------------------+--------+------------| |>> | Factory configured - do not | J2 | Open | | | alter | | | |---+----------------------------------+--------+------------| |>> | Turbo mode enabled | J3 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | Turbo mode disabled | J3 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| |>> | CMOS memory normal operation | JP16 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | CMOS memory clear | JP16 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Monitor type select color | JP17 | Closed | |---+----------------------------------+--------+------------| | | Monitor type select monochrome | JP17 | Open | |---+----------------------------------+--------+------------| |>> | Enter break switch | JP19 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | Leave break switch | JP19 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP23 | pins 1 & 2 | | | alter | | closed | |---+----------------------------------+--------+------------| |>> | Suspend mode disabled | JP26 | Open | |---+----------------------------------+--------+------------| | | Suspend mode enabled | JP26 | Closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP30 | Open | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP31 | Open | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP42 | Closed | | | alter | | | |------------------------------------------------------------| | Note: The location of JP23 & JP26 is unidentified. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | |------------+---------------+---------------+---------------| | 1MB | NONE | NONE | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 1MB | (4) 256K x 9 | NONE | NONE | |------------+---------------+---------------+---------------| | 2MB | NONE | (1) 256K x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 2MB | NONE | NONE | (1) 512K x 36 | |------------+---------------+---------------+---------------| | 2MB | (4) 256K x 9 | NONE | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 4MB | NONE | NONE | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 4MB | NONE | (1) 512K x 36 | (1) 512K x 36 | |------------+---------------+---------------+---------------| | 4MB | (4) 1M x 9 | NONE | NONE | |------------+---------------+---------------+---------------| | 5MB | NONE | (1) 1M x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 5MB | (4) 256K x 9 | NONE | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 6MB | (4) 1M x 9 | (1) 256K x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 6MB | NONE | (1) 1M x 36 | (1) 512K x 36 | |------------+---------------+---------------+---------------| | 6MB | (4) 256K x 9 | (1) 1M x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 8MB | (4) 1M x 9 | (1) 512K x 36 | (1) 512K x 36 | |------------+---------------+---------------+---------------| | 8MB | NONE | (1) 1M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 8MB | NONE | NONE | (1) 2M x 36 | |------------+---------------+---------------+---------------| | 8MB | (4) 1M x 9 | NONE | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 10MB | (4) 256K x 9 | (1) 2M x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 12MB | (4) 1M x 9 | NONE | (1) 2M x 36 | |------------+---------------+---------------+---------------| | 12MB | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 16MB | NONE | (1) 2M x 36 | (1) 2M x 36 | |------------+---------------+---------------+---------------| | 16MB | NONE | NONE | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 16MB | (4) 1M x 9 | (1) 2M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 16MB | (4) 1M x 9 | (1) 1M x 36 | (1) 2M x 36 | |------------+---------------+---------------+---------------| | 17MB | NONE | (1) 4M x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 17MB | (4) 256K x 9 | NONE | (1) 4M x 36 | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION (CON'T) | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | |------------+---------------+---------------+---------------| | 18MB | (4) 4M x 9 | (1) 256K x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 18MB | NONE | (1) 4M x 36 | (1) 512K x 36 | |------------+---------------+---------------+---------------| | 18MB | (4) 256K x 9 | (1) 4M x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 20MB | (4) 4M x 9 | (1) 512K x 36 | (1) 512K x 36 | |------------+---------------+---------------+---------------| | 20MB | NONE | (1) 4M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 24MB | (4) 4M x 9 | (1) 1M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 24MB | (4) 1M x 9 | (1) 4M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 32MB | NONE | (1) 4M x 36 | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 32MB | NONE | NONE | (1) 8M x 36 | |------------+---------------+---------------+---------------| | 32MB | (4) 4M x 9 | NONE | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 36MB | (4) 4M x 9 | (1) 4M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 36MB | NONE | (1) 8M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 36MB | (4) 1M x 9 | NONE | (1) 8M x 36 | |------------+---------------+---------------+---------------| | 36MB | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 40MB | (4) 1M x 9 | (1) 8M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 48MB | NONE | (1) 8M x 36 | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 48MB | (4) 4M x 9 | NONE | (1) 8M x 36 | |------------+---------------+---------------+---------------| | 48MB | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 64MB | NONE | (1) 8M x 36 | (1) 8M x 36 | |------------+---------------+---------------+---------------| | 64MB | NONE | NONE | (1) 16M x 36 | |------------+---------------+---------------+---------------| | 64MB | (4) 4M x 9 | (1) 4M x 36 | (1) 8M x 36 | |------------+---------------+---------------+---------------| | 64MB | (4) 16M x 9 | NONE | NONE | |------------+---------------+---------------+---------------| | 64MB | (4) 4M x 9 | (1) 8M x 36 | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 64MB | (4) 16M x 9 | NONE | NONE | |------------+---------------+---------------+---------------| | 65MB | NONE | (1) 16M x 36 | (1) 256K x 36 | |------------+---------------+---------------+---------------| | 65MB | (4) 256K x 9 | NONE | (1) 16M x 36 | |------------+---------------+---------------+---------------| | 68MB | NONE | (1) 16M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 72MB | (4) 16M x 9 | (1) 1M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 72MB | (4) 1M x 9 | (1) 16M x 36 | (1) 1M x 36 | |------------+---------------+---------------+---------------| | 80MB | NONE | (1) 16M x 36 | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 80MB | (4) 4M x 9 | NONE | (1) 16M x 36 | |------------+---------------+---------------+---------------| | 96MB | (4) 16M x 9 | (1) 4M x 36 | (1) 4M x 36 | |------------+---------------+---------------+---------------| | 128MB | NONE | (1) 16M x 36 | (1) 16M x 36 | |------------+---------------+---------------+---------------| | 128MB | (4) 16M x 9 | NONE | (1) 16M x 36 | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM JUMPER CONFIGURATION | |------------------------------------------------------------| | Bank 0 | Bank 1 | Bank 2 | JP33 | JP34 | JP35 | |-----------+-----------+-----------+-------+-------+--------| | SIMM 1-4 | SIMM 6 | SIMM 5 | Open | 1 & 2 | Open | | | (S) | (S) | | | | |-----------+-----------+-----------+-------+-------+--------| | SIMM 1-4 | SIMM 6 | SIMM 5 | Open | 1 & 2 | Closed | | | (D) | (S) | | | | |-----------+-----------+-----------+-------+-------+--------| | SIMM 1-4 | SIMM 6 | SIMM 5 | 2 & 3 | 1 & 2 | Open | | | (S) | (D) | | | | |-----------+-----------+-----------+-------+-------+--------| | SIMM 6 | SIMM 5 | SIMM 1-4 | 1 & 2 | 2 & 3 | Open | | (S) | (S) | | | | | |-----------+-----------+-----------+-------+-------+--------| | SIMM 6 | SIMM 5 | SIMM 1-4 | 1 & 2 | 2 & 3 | Open | | (D) | (D) | | | | | |-----------+-----------+-----------+-------+-------+--------| | SIMM 6 | SIMM 5 | NONE | 1 & 2 | 2 & 3 | Open | | (D) | (S) | | | | | |-----------+-----------+-----------+-------+-------+--------| | SIMM 6 | SIMM 5 | SIMM 1-4 | 1 & 2 | 2 & 3 | Open | | (D) | (D) | | | | | |------------------------------------------------------------| | Note:Pins designated should be in the closed positon. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM JUMPER CONFIGURATION (CON'T) | |------------------------------------------------------------| | Bank 0 | Bank 1 | Bank 2 | JP36 | JP37 | JP38 | |------------+-----------+-----------+-------+-------+-------| | SIMM 1-4 | SIMM 6 | SIMM 5 | 2 & 3 | Open | 2 & 3 | | | (S) | (S) | | | | |------------+-----------+-----------+-------+-------+-------| | SIMM 1-4 | SIMM 6 | SIMM 5 | 2 & 3 | 2 & 3 | Open | | | (D) | (S) | | | | |------------+-----------+-----------+-------+-------+-------| | SIMM 1-4 | SIMM 6 | SIMM 5 | 2 & 3 | Open | 2 & 3 | | | (S) | (D) | | | | |------------+-----------+-----------+-------+-------+-------| | SIMM 6 (S) | SIMM 5 | SIMM 1-4 | 1 & 2 | 1 & 2 | 1 & 2 | | | (S) | | | | | |------------+-----------+-----------+-------+-------+-------| | SIMM 6 (D) | SIMM 5 | SIMM 1-4 | 1 & 2 | 1 & 2 | 1 & 2 | | | (D) | | | | | |------------+-----------+-----------+-------+-------+-------| | SIMM 6 (D) | SIMM 5 | NONE | 1 & 2 | 1 & 2 | 1 & 2 | | | (S) | | | | | |------------+-----------+-----------+-------+-------+-------| | SIMM 6 (D) | SIMM 5 | SIMM 1-4 | 1 & 2 | 1 & 2 | 1 & 2 | | | (D) | | | | | |------------------------------------------------------------| | Note:Pins designated should be in the closed positon. | +------------------------------------------------------------+ +------------------------------------------------------------+ | 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 | |------------+---------------+---------------+---------------| | 256KB | (4) 64K x 8 | NONE | (1) 32K x 8 | |------------+---------------+---------------+---------------| | 512KB | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 | |------------+---------------+---------------+---------------| | 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | JP1 | JP2 | JP4 | JP40 | JP41 | |----------+----------+----------+---------+--------+--------| | 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | |----------+----------+----------+---------+--------+--------| | 256KB | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | |----------+----------+----------+---------+--------+--------| | 256KB | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | |----------+----------+----------+---------+--------+--------| | 512KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | |----------+----------+----------+---------+--------+--------| | 512KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION | |------------------------------------------------------------| | Type | JP8 | JP9 |JP10 |JP11 | JP12 |JP13| JP14 |JP15 | |---------+-----+------+-----+-----+-------+----+------+-----| | CX486SX |2 & 3| Open |2 & 3|Open | 2-3, |Open| 1-2, |2 & 3| | | | | | | 4-5 | | 3-4 | | |---------+-----+------+-----+-----+-------+----+------+-----| | 486SX |2 & 3| Open |2 & 3|Open | Open |Open| Open |Open | |---------+-----+------+-----+-----+-------+----+------+-----| | 486SL |1 & 2|Closed|2 & 3|2 & 3| 3 & 4 |Open|2 & 3 |4 & 5| |---------+-----+------+-----+-----+-------+----+------+-----| | CX486DX |1 & 2|Closed|2 & 3|2 & 3| 2 & 3 |Open| 1-2, |2 & 3| | | | | | | | | 3-4 | | |---------+-----+------+-----+-----+-------+----+------+-----| |486DX/DX2|1 & 2|Closed|2 & 3|2 & 3| Open |Open| Open |Open | |---------+-----+------+-----+-----+-------+----+------+-----| | 486DX4 |1 & 2|Closed|2 & 3|2 & 3| 3 & 4 |Open|2 & 3 |4 & 5| |------------------------------------------------------------| |Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION (CON'T) | |------------------------------------------------------------| | Type | JP21 | JP22 | JP24 | JP25 | JP46 | JP48 | JP50 | |-----------+------+------+------+------+------+------+------| | CX486SX | 1 & | 2 & | 2 & | 2 & | 1 & | 2 & | 2 & | | | 2 | 3 | 3 | 3 | 2 | 3 | 3 | |-----------+------+------+------+------+------+------+------| | 486SX | 2 & | 1 & | 1 & | Open | 2 & | 2 & | 2 & | | | 3 | 2 | 2 | | 3 | 3 | 3 | |-----------+------+------+------+------+------+------+------| | 486SL | 2 & | 1 & | Open | Open | 2 & | 2 & | 2 & | | | 3 | 2 | | | 3 | 3 | 3 | |-----------+------+------+------+------+------+------+------| | CX486DX | 1 & | 2 & | 2 & | 2 & | 1 & | 2 & | 2 & | | | 2 | 3 | 3 | 3 | 2 | 3 | 3 | |-----------+------+------+------+------+------+------+------| | 486DX/DX2 | 2 & | 1 & | 1 & | Open | 2 & | 2 & | 2 & | | | 3 | 2 | 2 | | 3 | 3 | 3 | |-----------+------+------+------+------+------+------+------| | 486DX4 | 2 & | 1 & | Open | Open | 2 & | 1 & | 1 & | | | 3 | 2 | | | 3 | 2 | 2 | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| |Speed | JP5 | JP6 | JP7 | JP20 | JP32 | JP47 |JP49 |JP51 | |------+------+------+------+------+------+------+-----+-----| |20MHz |Closed| Open |Closed|1 & 2 |Closed| Open |Open |Open | |------+------+------+------+------+------+------+-----+-----| |25MHz |Closed|Closed| Open |1 & 2 |Closed| Open |Open |Open | |------+------+------+------+------+------+------+-----+-----| |33MHz | Open |Closed|Closed|1 & 2 |Closed| Open |Open |Open | |------+------+------+------+------+------+------+-----+-----| |40MHz |Closed| Open | Open |2 & 3 |Closed| Open |Open |Open | |------+------+------+------+------+------+------+-----+-----| |50iMHz|Closed|Closed| Open |1 & 2 |Closed| Open |Open |Open | |------+------+------+------+------+------+------+-----+-----| |50MHz | Open | Open |Closed|1 & 2 |Closed| Open |Open |Open | |------+------+------+------+------+------+------+-----+-----| |66iMHz| Open |Closed|Closed|1 & 2 |Closed| Open |Open |Open | |------------------------------------------------------------| |Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION (DX4 ONLY) | |------------------------------------------------------------| | Speed | JP5 | JP6 | JP7 |JP20 |JP32|JP47 |JP49 | JP51 | |---------+------+------+------+-----+----+-----+-----+------| |25/75MHz |Closed|Closed| Open |1 & 2|Open|2 & 3|1 & 2| Open | |---------+------+------+------+-----+----+-----+-----+------| |33/83MHz | Open |Closed|Closed|1 & 2|Open|2 & 3|Open |Closed| |---------+------+------+------+-----+----+-----+-----+------| |33/100MHz| Open |Closed|Closed|1 & 2|Open|1 & 2|1 & 2| Open | |---------+------+------+------+-----+----+-----+-----+------| |50/100MHz| Open | Open |Closed|1 & 2|Open|1 & 2|2 & 3| Open | |------------------------------------------------------------| |Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | VESA WAIT STATE CONFIGURATION | |------------------------------------------------------------| | Wait states | JP28 | |----------------------------+-------------------------------| | 0 wait states | pins 1 & 2 closed | |----------------------------+-------------------------------| | 1 wait state | pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | VESA BUS SPEED CONFIGURATION | |------------------------------------------------------------| | CPU speed | JP29 | |----------------------------+-------------------------------| | < = 33MHz | pins 1 & 2 closed | |----------------------------+-------------------------------| | > 33MHz | pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | GREEN PC CONFIGURATION | |------------------------------------------------------------| | Description | JP45 | |-------------------------------+----------------------------| | Control video HSYNC | pin 1 | |-------------------------------+----------------------------| | Ground | pin 2 | |-------------------------------+----------------------------| | Control video VSYNC | pin 3 | |-------------------------------+----------------------------| | Ground | pin 4 | |-------------------------------+----------------------------| | Control ENVIDEO | pin 5 | |-------------------------------+----------------------------| | Ground | pin 6 | |-------------------------------+----------------------------| | Monitor AC power | pin 7 | |-------------------------------+----------------------------| | Ground | pin 8 | +------------------------------------------------------------+