UNIDENTIFIED ============ 80386 SX Processor 80386SX Processor Speed 16/20MHz Chip Set Unidentified Video Chip Set None Maximum Onboard Memory 4MB Maximum Video Memory None Cache None BIOS AMI Dimensions 330mm x 217mm I/O Options None NPU Options 80387SX +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |----------------+----------+---------------------+----------| | Turbo LED | JP1 | Turbo switch | JP4 | |----------------+----------+---------------------+----------| | Speaker | JP2 | Power LED & keylock | JP5 | |----------------+----------+---------------------+----------| | Reset switch | JP3 | External battery | JP15 | |------------------------------------------------------------| | Note: JP4 may be a 2-pin jumper. | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Label | Position | |---------------------------------------+-------+------------| | | ROM wait state select 2 wait | J1 | Pins 2 & 3 | | | states (16MHz CPU) | | closed | |---+-----------------------------------+-------+------------| | | ROM wait state select 3 wait | J1 | Pins 1 & 2 | | | states (20MHz CPU) | | closed | |---+-----------------------------------+-------+------------| | | Turbo enabled | JP4 | Pins 2 & 3 | | | | | closed | |---+-----------------------------------+-------+------------| | | Turbo disabled | JP4 | Pins 1 & 2 | | | | | closed | |---+-----------------------------------+-------+------------| | | NPU not installed | JP6 | Pins 2 & 3 | | | | | closed | |---+-----------------------------------+-------+------------| | | NPU installed | JP6 | Pins 1 & 2 | | | | | closed | |---+-----------------------------------+-------+------------| | | Parity disabled | JP7 | Open | |---+-----------------------------------+-------+------------| | | Parity enabled | JP7 | Closed | |---+-----------------------------------+-------+------------| | | RAM wait state select 0 wait | JP8 | Pins 1 & 2 | | | states (only if JP9 is open) | | closed | |---+-----------------------------------+-------+------------| | | RAM wait state select 1 wait | JP8 | Pins 2 & 3 | | | state (only if JP9 is open) | | closed | |---+-----------------------------------+-------+------------| | | JP8 enabled | JP9 | Open | |---+-----------------------------------+-------+------------| | | 8042 keyboard controller pin 29 | JP9 | Closed | |---+-----------------------------------+-------+------------| |>> | Factory configured - do not alter | JP10 | Open | | | (for AMI BIOS & 8042) | | | |---+-----------------------------------+-------+------------| | | Monitor type select color | JP11 | Pins 2 & 3 | | | | | closed | |---+-----------------------------------+-------+------------| | | Monitor type select monochrome | JP11 | Pins 1 & 2 | | | | | closed | |---+-----------------------------------+-------+------------| | | Power good signal detect from | JP13 | Pins 2 & 3 | | | power supply | | closed | |---+-----------------------------------+-------+------------| | | Power good signal detect from | JP13 | Pins 1 & 2 | | | board | | closed | |---+-----------------------------------+-------+------------| | | 12v battery charge disabled | JP14 | Pins 1 & 2 | | | | | closed | |---+-----------------------------------+-------+------------| | | 12v battery charge enabled | JP14 | Pins 2 & 3 | | | | | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | |------------------+--------------------+--------------------| | 512KB | (18) 41256 | None | |------------------+--------------------+--------------------| | 640KB | (18) 41256 | (18) 4164 | |------------------+--------------------+--------------------| | 1MB | (18) 41256 | (18) 41256 | |------------------+--------------------+--------------------| | 2MB | (18) 411000 | None | |------------------+--------------------+--------------------| | 4MB | (18) 411000 | (18) 411000 | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | J3 | |----------------------------+-------------------------------| | 512KB | Pins 1 & 2, 3 & 4 closed | |----------------------------+-------------------------------| | 640KB | Pins 2 & 4, 3 & 5 closed | |----------------------------+-------------------------------| | 1MB | Pins 3 & 5, 4 & 6 closed | |----------------------------+-------------------------------| | 2MB | Pins 1 & 3, 4 & 6 closed | |----------------------------+-------------------------------| | 4MB | Pins 1 & 3, 4 & 6 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED SELECTION | |------------------------------------------------------------| | Speed | J2 | |----------------------------+-------------------------------| | 16MHz | Pins 3 & 4, 7 & 8 closed | |----------------------------+-------------------------------| | 20MHz | Pins 3 & 4, 5 & 6 closed | +------------------------------------------------------------+