MICRONICS COMPUTERS, INC. ========================= ZIF SOCKET SYSTEM BOARD Processor 80486SX/80486DX/80486DX2/Pentium Overdrive Processor 25/33/50(internal)66/(internal)MHz Speed Chip Set Intel Max. Onboard 64MB DRAM Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, serial ports (2) NPU Options None +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |-------------------+----------+------------------+----------| | Floppy drive | CN1 | Speaker | J33 | | interface | | | | |-------------------+----------+------------------+----------| | IDE interface | CN2 | Power LED & | J34 | | | | keylock | | |-------------------+----------+------------------+----------| | External battery | J8 | IDE interface | W11 | | | | LED | | |-------------------+----------+------------------+----------| | External keyboard | J10 | Reset switch | W12 | | connector | | | | |-------------------+----------+------------------+----------| | Serial port 1 | J12 | Turbo LED | W13 | |-------------------+----------+------------------+----------| | Parallel port | J15 | Turbo switch | W14 | |-------------------+----------+------------------+----------| | Serial port 2 | J16 | 32-bit VESA | SL1 & | | | | Local bus slots | SL2 | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper/Switch | Position | |-------------------------------+---------------+------------| |>> | Factory configured - do | SW1/2 | On | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | SW1/3 | Off | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | SW1/4 | Off | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Clock type select | W1 | Open | | | Motorola 126818 | | | |---+---------------------------+---------------+------------| | | Clock type select Dallas | W1 | Closed | |---+---------------------------+---------------+------------| |>> | Parallel port | W5 | pins 1 & 2 | | | unidirectional (printer) | | closed | |---+---------------------------+---------------+------------| | | Parallel port | W5 | pins 2 & 3 | | | bidirectional | | closed | |---+---------------------------+---------------+------------| |>> | Monitor type select color | W6 | Closed | |---+---------------------------+---------------+------------| | | Monitor type select | W6 | Open | | | monochrome | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W7 | Open | | | not alter | | | |---+---------------------------+---------------+------------| |>> | CMOS memory normal | W8 | pins 2 & 3 | | | operation | | closed | |---+---------------------------+---------------+------------| | | CMOS memory clear | W8 | pins 1 & 2 | | | | | closed | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W20 | Closed | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W28 | Closed | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Battery normal operation | W31 | Open | | | (Dallas) | | | |---+---------------------------+---------------+------------| | | Battery memory clear | W31 | Closed | | | (Dallas) | | | |---+---------------------------+---------------+------------| |>> | Local bus parity enabled | W40 | Closed | |---+---------------------------+---------------+------------| | | Local bus disabled | W40 | Open | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W61 | Open | | | not alter | | | |---+---------------------------+---------------+------------| |>> | Factory configured - do | W62 | Open | | | not alter | | | |---+---------------------------+---------------+------------| |>> | CPU type select | W70 | pins 2 & 3 | | | 80486DX/DX2/Pentium | | closed | | | Overdrive | | | |---+---------------------------+---------------+------------| | | CPU type select 80486SX | W70 | pins 1 & 2 | | | | | closed | |---+---------------------------+---------------+------------| |>> | CPU type select PQFP | W71 | pins 1 & 2 | | | installed with PGA | | closed | | | Pentium Overdrive | | | |---+---------------------------+---------------+------------| | | CPU type select PQFP | W71 | pins 2 & 3 | | | installed with PGA | | closed | | | 80486DX/DX2 | | | |------------------------------------------------------------| | Note: The location of jumpers W20, W28, W61 & W62 are | | unidentified. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 1MB | (1) 256K x | NONE | NONE | NONE | | | 36 | | | | |------+-------------+-------------+------------+------------| | 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 | |------+-------------+-------------+------------+------------| | 5MB | (1) 256K x | (1) 1M x 36 | NONE | NONE | | | 36 | | | | |------+-------------+-------------+------------+------------| | 6MB | (1) 256K x | (1) 256K x | (1) 1M x | NONE | | | 36 | 36 | 36 | | |------+-------------+-------------+------------+------------| | 7MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 1M x | | | 36 | 36 | 36 | 36 | |------+-------------+-------------+------------+------------| | 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 9MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | NONE | | | 36 | | 36 | | |------+-------------+-------------+------------+------------| | 10MB | (1) 256K x | (1) 256K x | (1) 1M x | (1) 1M x | | | 36 | 36 | 36 | 36 | |------+-------------+-------------+------------+------------| | 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 13MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | (1) 1M x | | | 36 | | 36 | 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 | |------+-------------+-------------+------------+------------| | 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION (CON'T) | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 28MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 4M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE | |------+-------------+-------------+------------+------------| | 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE | | | | | 36 | | |------+-------------+-------------+------------+------------| | 52MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | +------------------------------------------------------------+ +------------------------------------------------------------+ | 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 | W64 | W65 | W66 | W67 | W68 | |----------+----------+----------+---------+--------+--------| | 64KB | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | |----------+----------+----------+---------+--------+--------| | 128KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | |----------+----------+----------+---------+--------+--------| | 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | |------------------------------------------------------------| | Note: Pins designated should be in the closed position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | Speed | SW1/1 | |-------------------------------+----------------------------| | 25MHz | On | |-------------------------------+----------------------------| | 33MHz | Off | |-------------------------------+----------------------------| | 50iMHz | On | |-------------------------------+----------------------------| | 66iMHz | Off | +------------------------------------------------------------+