DIGITAL EQUIPMENT CORPORATION ============================= DECPC LP Device Type Mainboard Processor 80486SX/80486DX/80486DX2 Processor Speed 25/33/50(internal)/66(internal)MHz Chip Set OPTI Video Chip Set Unidentified Maximum Onboard 64MB Memory Maximum Video 1MB Memory Cache 64KB BIOS Unidentified Dimensions 254mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot NPU Options None +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |-----------------+----------+--------------------+----------| | VGA port | CN1 | IDE interface | CN6 | |-----------------+----------+--------------------+----------| | Parallel port | CN2 | Floppy drive | CN7 | | | | interface | | |-----------------+----------+--------------------+----------| | Serial port 2 | CN3 | VGA feature | CN8 | | | | connector | | |-----------------+----------+--------------------+----------| | Serial port 1 | CN4 | CPU board | CN9 | | | | connectors | | |-----------------+----------+--------------------+----------| | PS/2 mouse port | CN5 | Riser slot | SL1 | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Label | Position | |---------------------------------------+-------+------------| |>> | VGA IRQ9 disabled | J1 | Open | |---+-----------------------------------+-------+------------| | | VGA IRQ9 enabled | J1 | Closed | |---+-----------------------------------+-------+------------| |>> | On board video disabled | J2 | Open | |---+-----------------------------------+-------+------------| | | On board video enabled | J2 | Closed | |---+-----------------------------------+-------+------------| |>> | CMOS memory normal operation | J3 | Pins 1 & 2 | | | | | closed | |---+-----------------------------------+-------+------------| | | CMOS memory clear | J3 | Pins 2 & 3 | | | | | closed | |---+-----------------------------------+-------+------------| | | Reset switch enabled | J4 | Closed | |---+-----------------------------------+-------+------------| | | Reset switch disabled | J4 | Open | |---+-----------------------------------+-------+------------| | | Parallel port unidirectional | J5 | Pins 1 & 2 | | | | | closed | |---+-----------------------------------+-------+------------| | | Parallel port bidirectional | J5 | Pins 2 & 3 | | | | | closed | |---+-----------------------------------+-------+------------| |>> | Factory configured - do not alter | J10 | Open | |---+-----------------------------------+-------+------------| |>> | Monitor type select color | J11 | Closed | |---+-----------------------------------+-------+------------| | | Monitor type select monochrome | J11 | Open | |---+-----------------------------------+-------+------------| |>> | Factory configured - do not alter | J29 | Open | |---+-----------------------------------+-------+------------| |>> | Factory configured - do not alter | J30 | Open | |---+-----------------------------------+-------+------------| |>> | Factory configured - do not alter | J31 | Open | |---+-----------------------------------+-------+------------| | | VGAIOW select local | J35 | Pins 1 & 2 | | | | | closed | |---+-----------------------------------+-------+------------| | | VGAIOW select local & ISA | J35 | Pins 2 & 3 | | | | | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | SIMM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |--------+-------------+-------------+-------------+---------| | 4MB | (1) 1M x 36 | None | None | None | |--------+-------------+-------------+-------------+---------| | 8MB | (1) 2M x 36 | None | None | None | |--------+-------------+-------------+-------------+---------| | 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None | |--------+-------------+-------------+-------------+---------| | 12MB | (1) 2M x 36 | (1) 1M x 36 | None | None | |--------+-------------+-------------+-------------+---------| | 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 | None | +------------------------------------------------------------+ +------------------------------------------------------------+ | SIMM CONFIGURATION (CON'T) | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 12MB | (1) 1M x 36 | (1) 2M x 36 | None | None | |------+-------------+-------------+------------+------------| | 16MB | (1) 4M x 36 | None | None | None | |------+-------------+-------------+------------+------------| | 16MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 16MB | (1) 2M x 36 | (1) 2M x 36 | None | None | |------+-------------+-------------+------------+------------| | 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 20MB | (1) 4M x 36 | (1) 1M x 36 | None | None | |------+-------------+-------------+------------+------------| | 20MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 20MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 20MB | (1) 1M x 36 | (1) 4M x 36 | None | None | |------+-------------+-------------+------------+------------| | 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 24MB | (1) 4M x 36 | (1) 2M x 36 | None | None | |------+-------------+-------------+------------+------------| | 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 24MB | (1) 2M x 36 | (1) 4M x 36 | None | None | |------+-------------+-------------+------------+------------| | 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 32MB | (1) 8M x 36 | None | None | None | |------+-------------+-------------+------------+------------| | 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None | |------+-------------+-------------+------------+------------| | 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 36MB | (1) 8M x 36 | (1) 1M x 36 | None | None | |------+-------------+-------------+------------+------------| | 40MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 40MB | (1) 8M x 36 | (1) 2M x 36 | None | None | |------+-------------+-------------+------------+------------| | 40MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 40MB | (1) 2M x 36 | (1) 4M x 36 | (1) 4M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 40MB | (1) 2M x 36 | (1) 8M x 36 | None | None | |------+-------------+-------------+------------+------------| | 44MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 48MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 48MB | (1) 8M x 36 | (1) 4M x 36 | None | None | |------+-------------+-------------+------------+------------| | 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 48MB | (1) 4M x 36 | (1) 8M x 36 | None | None | |------+-------------+-------------+------------+------------| | 56MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 56MB | (1) 2M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 64MB | (1) 8M x 36 | (1) 4M x 36 | (1) 4M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 64MB | (1) 8M x 36 | (1) 8M x 36 | None | None | |------+-------------+-------------+------------+------------| | 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x | | | | | 36 | 36 | +------------------------------------------------------------+ +------------------------------------------------------------+ | VIDEO MEMORY CONFIGURATION | |------------------------------------------------------------| | Note: Board accepts 512KB/1MB of video memory. The | | configuration is unidentified. | +------------------------------------------------------------+ +------------------------------------------------------------+ | VIDEO MEMORY JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | J28 | |----------------------------+-------------------------------| | 512KB | Pins 1 & 2 closed | |----------------------------+-------------------------------| | 1MB | Pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | |-------------------------------+----------------------------| | CPU board connectors | CN9 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | |----------------------------+-------------------------------| | 128KB | (4) 32K x 8 | |----------------------------+-------------------------------| | 256KB | (4) 64K x 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | J103 | J104 | |------------------+--------------------+--------------------| | 128KB | Pins 1 & 2 closed | Pins 1 & 2 closed | |------------------+--------------------+--------------------| | 256KB | Pins 2 & 3 closed | Pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED SELECTION | |------------------------------------------------------------| | Speed | J109 | J110 | J111 | J112 | |------------+------------+-----------+-----------+----------| | 33MHz | Closed | Open | Open | Open | |------------+------------+-----------+-----------+----------| | 66iMHz | Closed | Open | Open | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE SELECTION | |------------------------------------------------------------| | Type | J114 | J115 | |------------------+--------------------+--------------------| | 80486SX | Pins 2 & 3 closed | Pins 2 & 3 closed | |------------------+--------------------+--------------------| | 80486DX | Pins 1 & 2 closed | Pins 1 & 2 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SECOND SOCKET SELECTION | |------------------------------------------------------------| | Setting | J101 | J102 | J103 | |---------------+------------------+------------+------------| | Not installed | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | | | closed | closed | closed | |---------------+------------------+------------+------------| | ODP486 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | | | closed | closed | closed | |---------------+------------------+------------+------------| | 80486DX | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | | | closed | closed | closed | |---------------+------------------+------------+------------| | 80486DX2 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | | | closed | closed | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | |-------------------------------+----------------------------| | CPU board connectors | CN9 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | |----------------------------+-------------------------------| | 128KB | (4) 32K x 8 | |----------------------------+-------------------------------| | 256KB | (4) 64K x 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | J103 | J104 | |------------------+--------------------+--------------------| | 128KB | Pins 1 & 2 closed | Pins 1 & 2 closed | |------------------+--------------------+--------------------| | 256KB | Pins 2 & 3 closed | Pins 2 & 3 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED SELECTION | |------------------------------------------------------------| | Speed | J109 | J110 | J111 | J112 | |------------+------------+-----------+-----------+----------| | 25MHz | Closed | Open | Open | Open | |------------+------------+-----------+-----------+----------| | 50iMHz | Closed | Open | Open | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SECOND SOCKET SELECTION | |------------------------------------------------------------| | Setting | J101 | J102 | J103 | |---------------+------------------+------------+------------| | Not installed | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | | | closed | closed | closed | |---------------+------------------+------------+------------| | ODP486 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | | | closed | closed | closed | |---------------+------------------+------------+------------| | 80486DX | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | | | closed | closed | closed | |---------------+------------------+------------+------------| | 80486DX2 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | | | closed | closed | closed | +------------------------------------------------------------+