AST RESEARCH, INC. ================== PREMMIA MS 486 Processor 80486SX/80486DX/ODP486SX/80486DX2/80486DX4/Pentium Overdrive Processor 25/33/50(internal)/66(internal)MHz Speed Chip Set AST Max. 128MB Onboard DRAM Cache 64/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA port NPU Options None +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |-------------------+----------+------------------+----------| | VGA port | CN1 | External battery | J26 | |-------------------+----------+------------------+----------| | Parallel port | CN2 | Speaker | J27 | |-------------------+----------+------------------+----------| | Serial port 2 | CN3 | Chassis fan | J28 | | | | power | | |-------------------+----------+------------------+----------| | Serial port 1 | CN4 | Front panel | J29 | | | | connector | | |-------------------+----------+------------------+----------| | PS/2 mouse port | CN5 | Chassis fan | J32 | | | | power | | |-------------------+----------+------------------+----------| | IDE interface 2 | J22 | IDE interface | J40 | | | | LED | | |-------------------+----------+------------------+----------| | IDE interface 1 | J23 | Riser Card | SL1 | |-------------------+----------+------------------+----------| | Floppy drive | J24 | | | | interface | | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper/Switch | Position | |-------------------------------+---------------+------------| |>> | Cache type select write | E1 | Open | | | back | | | |---+---------------------------+---------------+------------| | | Cache type select write | E1 | Closed | | | through | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | E6 | pins 1 & 2 | | | not alter | | closed | |---+---------------------------+---------------+------------| |>> | CMOS memory normal | E8 | Open | |---+---------------------------+---------------+------------| | | CMOS memory clear | E8 | Closed | |---+---------------------------+---------------+------------| |>> | Flash BIOS write protect | SW1/1 | Off | | | enabled | | | |---+---------------------------+---------------+------------| | | Flash BIOS write protect | SW1/1 | On | | | disabled | | | |---+---------------------------+---------------+------------| |>> | Password enabled | SW1/2 | On | |---+---------------------------+---------------+------------| | | Password disabled | SW1/2 | Off | |---+---------------------------+---------------+------------| |>> | Monitor type select color | SW1/3 | On | |---+---------------------------+---------------+------------| | | Monitor type select | SW1/3 | Off | | | monochrome | | | |---+---------------------------+---------------+------------| |>> | System setup enabled | SW1/4 | On | |---+---------------------------+---------------+------------| | | system setup disabled | SW1/4 | Off | |---+---------------------------+---------------+------------| |>> | Factory configured - do | SW1/5 | Off | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | SW1/6 | Off | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | SW1/7 | Off | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | SW1/8 | Off | | | not alter | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 2MB | (1) 256K x | (1) 256K x | NONE | NONE | | | 36 | 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) 1M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 9MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 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) 4M x 36 | NONE | NONE | NONE | |------+-------------+-------------+------------+------------| | 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 49MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 256K x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 64MB | (1) 8M x 36 | (1) 8M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 65MB | (1) 8M x 36 | (1) 8M x 36 | (1) 256K x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 66MB | (1) 8M x 36 | (1) 8M x 36 | (1) 256K x | (1) 256K x | | | | | 36 | 36 | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION (CON'T) | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |-------+-------------+------------+------------+------------| | 68MB | (1) 8M x 36 | (1) 8M x | (1) 1M x | NONE | | | | 36 | 36 | | |-------+-------------+------------+------------+------------| | 72MB | (1) 8M x 36 | (1) 8M x | (1) 1M x | (1) 1M x | | | | 36 | 36 | 36 | |-------+-------------+------------+------------+------------| | 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE | | | | 36 | 36 | | |-------+-------------+------------+------------+------------| | 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x | | | | 36 | 36 | 36 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | TAG | |------------+---------------+---------------+---------------| | 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | |------------+---------------+---------------+---------------| | 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | E5 | |-----------------------------+------------------------------| | 64KB | Open | |-----------------------------+------------------------------| | 256KB | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION | |------------------------------------------------------------| | Type | E1 | E2 | E3 | E4 | |--------------------+------+------------+------------+------| | 80486SX (PQFP) | Open | pins 2 & 3 | pins 1 & 2 | Open | | | | closed | closed | | |--------------------+------+------------+------------+------| | ODP486SX | Open | pins 2 & 3 | pins 1 & 2 | Open | | | | closed | closed | | |--------------------+------+------------+------------+------| | 80486DX (write | Open | pins 1 & 2 | pins 2 & 3 | Open | | back) | | closed | closed | | |--------------------+------+------------+------------+------| | 80486DX/DX2 | Open | pins 1 & 2 | pins 1 & 2 | Open | | | | closed | closed | | |--------------------+------+------------+------------+------| | 80486DX4 | Open | pins 1 & 2 | pins 1 & 2 | Open | | | | closed | closed | | |--------------------+------+------------+------------+------| | Pentium Overdrive | Open | pins 2 & 3 | pins 2 & 3 | Open | | | | closed | closed | | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | Speed | E7 | E9 | |-------------------+--------------------+-------------------| | 25MHz | pins 1 & 2 closed | Closed | |-------------------+--------------------+-------------------| | 33MHz | pins 2 & 3 closed | Open | |-------------------+--------------------+-------------------| | 50iMHz | pins 1 & 2 closed | Closed | |-------------------+--------------------+-------------------| | 66iMHz | pins 2 & 3 closed | Open | +------------------------------------------------------------+