SOYO COMPUTER CO., LTD. ======================= 486 VESA MAINBOARD Processor CX486S/80486SX/CX486S2/80487SX/CX486DX/80486DX/CX486DX2/ 80486DX2/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set ALI Max. 128MB Onboard DRAM Cache 64/128/256KB BIOS AMI Dimensions 254mm x 220mm I/O 32-bit VESA local bus slots (2) Options NPU None Options +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |-------------------+----------+------------------+----------| | Power LED & | J17 | Turbo switch | J21 | | keylock | | | | |-------------------+----------+------------------+----------| | Speaker | J18 | Turbo LED | J22 | |-------------------+----------+------------------+----------| | Reset switch | J19 | 32-bit VESA | SL1 & | | | | local bus slots | SL2 | |-------------------+----------+------------------+----------| | External battery | J20 | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper | Position | |--------------------------------------+--------+------------| |>> | Monitor type select monochrome | JP3 | Open | |---+----------------------------------+--------+------------| | | Monitor type select color | JP3 | Closed | |---+----------------------------------+--------+------------| |>> | CMOS memory normal operation | JP5 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | CMOS memory clear | JP5 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP18 | Open | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | JP19 | Open | | | alter | | | |---+----------------------------------+--------+------------| |>> | Battery type select internal | JP20 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | Battery type select external | JP20 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| |>> | CPU type select PGA | JP30 | Closed | |---+----------------------------------+--------+------------| | | CPU type select PQFP | JP30 | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | 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 | |------------------+--------------------+--------------------| | 5MB | (4) 256K x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 8MB | (4) 1M x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 16MB | (4) 4M x 9 | NONE | |------------------+--------------------+--------------------| | 17MB | (4) 256K x 9 | (4) 4M x 9 | |------------------+--------------------+--------------------| | 20MB | (4) 1M x 9 | (4) 4M x 9 | |------------------+--------------------+--------------------| | 32MB | (4) 4M x 9 | (4) 4M x 9 | |------------------+--------------------+--------------------| | 64MB | (4) 16M x 9 | NONE | |------------------+--------------------+--------------------| | 68MB | (4) 1M x 9 | (4) 16M x 9 | |------------------+--------------------+--------------------| | 80MB | (4) 4M x 9 | (4) 16M x 9 | |------------------+--------------------+--------------------| | 128MB | (4) 16M x 9 | (4) 16M x 9 | +------------------------------------------------------------+ +------------------------------------------------------------+ | 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 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | JP16 | JP22 | JP23 | |-----------+----------------+---------------+---------------| | 64KB | N/A | N/A | N/A | |-----------+----------------+---------------+---------------| | 128KB | N/A | N/A | N/A | |-----------+----------------+---------------+---------------| | 256KB | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | | | closed | closed | closed | |------------------------------------------------------------| | Note: The jumper settings for 64KB & 128KB are unavailable | | from manufacturer. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION | |------------------------------------------------------------| | Type | JP1 | JP6 | JP7 | JP8 | JP9 | JP10 | |-------------+------+------+-------+------+--------+--------| | CX486S | 1 & | 2 & | 2 & 3 | 1 & | Open | Open | | | 2 | 3 | | 2 | | | |-------------+------+------+-------+------+--------+--------| | 80486SX | 1 & | 1 & | Open | 1 & | Closed | Closed | | | 2 | 2 | | 2 | | | |-------------+------+------+-------+------+--------+--------| | CX486S2 | 1 & | 2 & | 2 & 3 | 1 & | Open | Open | | | 2 | 3 | | 2 | | | |-------------+------+------+-------+------+--------+--------| | 80487SX | 1 & | 1 & | Open | 2 & | Closed | Closed | | | 2 | 2 | | 3 | | | |-------------+------+------+-------+------+--------+--------| | CX486DX | 1 & | 1 & | Open | 2 & | Closed | Closed | | | 2 | 2 | | 3 | | | |-------------+------+------+-------+------+--------+--------| | CX486DX2 | 1 & | 1 & | Open | 2 & | Closed | Closed | | | 2 | 2 | | 3 | | | |-------------+------+------+-------+------+--------+--------| | 80486DX/DX2 | 1 & | 1 & | Open | 2 & | Closed | Closed | | | 2 | 2 | | 3 | | | |-------------+------+------+-------+------+--------+--------| | Pentium | 2 & | 2 & | 1 & 2 | 2 & | Closed | Closed | | Overdrive | 3 | 3 | | 3 | | | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION (CON'T) | |------------------------------------------------------------| | Type | JP11 | JP12 | JP13 | JP14 | JP17 | JP31 | |-------------+-------+-------+-------+------+------+--------| | CX486S | 3 & 4 | 2 & 3 | 1 & 2 | 2 & | 2 & | Open | | | | | | 3 | 3 | | |-------------+-------+-------+-------+------+------+--------| | 80486SX | Open | 1 & 2 | 1 & 2 | 1 & | 1 & | Open | | | | | | 2 | 2 | | |-------------+-------+-------+-------+------+------+--------| | CX486S2 | 3 & 4 | 2 & 3 | 1 & 2 | 2 & | 2 & | Closed | | | | | | 3 | 3 | | |-------------+-------+-------+-------+------+------+--------| | 80487SX | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 1 & | Open | | | | | | 2 | 2 | | |-------------+-------+-------+-------+------+------+--------| | CX486DX | 2 & 3 | 1 & 2 | 1 & 2 | 2 & | 1 & | Open | | | | | | 3 | 2 | | |-------------+-------+-------+-------+------+------+--------| | CX486DX2 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & | 1 & | Closed | | | | | | 3 | 2 | | |-------------+-------+-------+-------+------+------+--------| | 80486DX/DX2 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & | 1 & | Open | | | | | | 2 | 2 | | |-------------+-------+-------+-------+------+------+--------| | Pentium | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & | Open | | Overdrive | | | | 2 | 2 | | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | Speed | JP24 | JP25 | JP26 | JP27 | |------------+-----------+-----------+-----------+-----------| | 25MHz | Open | Open | Closed | Open | |------------+-----------+-----------+-----------+-----------| | 33MHz | Closed | Open | Closed | Closed | |------------+-----------+-----------+-----------+-----------| | 40MHz | Open | Closed | Open | Open | |------------+-----------+-----------+-----------+-----------| | 50iMHz | Open | Open | Closed | Open | |------------+-----------+-----------+-----------+-----------| | 50MHz | Open | Open | Closed | Open | |------------+-----------+-----------+-----------+-----------| | 66iMHz | Closed | Open | Closed | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU CLOCK SPEED CONFIGURATION | |------------------------------------------------------------| | Speed | JP15 | JP21 | JP33 | |--------+-----------------+----------------+----------------| | 25MHz | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | | | closed | closed | closed | |--------+-----------------+----------------+----------------| | 33MHz | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | | | closed | closed | closed | |--------+-----------------+----------------+----------------| | 40MHz | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | | | closed | closed | closed | |--------+-----------------+----------------+----------------| | 50iMHz | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | | | closed | closed | closed | |--------+-----------------+----------------+----------------| | 50MHz | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | | | closed | closed | closed | |--------+-----------------+----------------+----------------| | 66iMHz | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | | | closed | closed | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | VESA WAIT STATE CONFIGURATION | |------------------------------------------------------------| | Wait states | JP28 | |----------------------------+-------------------------------| | 0 wait states | pins 1 & 2 closed | |----------------------------+-------------------------------| | 1 wait state | pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | BUS SPEED CONFIGURATION | |------------------------------------------------------------| | CPU speed | JP29 | |----------------------------+-------------------------------| | <= 33MHz | pins 1 & 2 closed | |----------------------------+-------------------------------| | > 33MHz | pins 2 & 3 closed | +------------------------------------------------------------+