COMPAQ COMPUTER CORPORATION =========================== PRESARIO 800 Processor 80486SX/80486SX2/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive Processor 25/33/50(internal)/66(internal)MHz Speed Chip Set Compaq Max. 64MB Onboard DRAM Cache 128KB (on external cache card) BIOS AMI Dimensions 330mm x 218mm I/O External cache card slot, floppy drive interface, IDE Options interface, parallel port, PS/2 mouse port, serial port, VGA feature connector, VGA port NPU None Options +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |------------------+----------+-------------------+----------| | Serial port | CN1 | IDE interface | CN6 | |------------------+----------+-------------------+----------| | PS/2 mouse port | CN2 | VGA feature | CN7 | | | | connector | | |------------------+----------+-------------------+----------| | Parallel port | CN3 | External battery | J17 | |------------------+----------+-------------------+----------| | VGA port | CN4 | Speaker | P11 | |------------------+----------+-------------------+----------| | Floppy drive | CN5 | External cache | SL1 | | interface | | card slot | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper | Position | |--------------------------------------+--------+------------| |>> | Pentium Overdrive mode select | P1 | Pins 2 & 3 | | | write back | | closed | |---+----------------------------------+--------+------------| | | Pentium Overdrive mode select | P1 | Pins 1 & 2 | | | write through | | closed | |---+----------------------------------+--------+------------| |>> | On board video enabled | P5 | Pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | On board video disabled | P5 | Pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Parallel port IRQ select IRQ7 | P8 | Pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | Parallel port IRQ select IRQ5 | P8 | Pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| |>> | CMOS memory normal operation | P9 | Closed | |---+----------------------------------+--------+------------| | | CMOS memory clear | P9 | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |---------+------------+------------+------------+-----------| | 4MB | (1) 1M x | NONE | NONE | NONE | | | 36 | | | | |---------+------------+------------+------------+-----------| | 5MB | (1) 1M x | (1) 256K x | NONE | NONE | | | 36 | 36 | | | |---------+------------+------------+------------+-----------| | 6MB | (1) 1M x | (1) 256K x | (1) 256K x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 7MB | (1) 1M x | (1) 256K x | (1) 256K x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 8MB | (1) 1M x | (1) 1M x | NONE | NONE | | | 36 | 36 | | | |---------+------------+------------+------------+-----------| | 9MB | (1) 1M x | (1) 1M x | (1) 256K x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 10MB | (1) 1M x | (1) 1M x | (1) 256K x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 12MB | (1) 1M x | (1) 1M x | (1) 1M x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 13MB | (1) 1M x | (1) 1M x | (1) 1M x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 16MB | (1) 1M x | (1) 1M x | (1) 1M x | (1) 1M x | | | 36 | 36 | 36 | 36 | |---------+------------+------------+------------+-----------| | 20MB | (1) 1M x | (1) 4M x | NONE | NONE | | | 36 | 36 | | | |---------+------------+------------+------------+-----------| | 21MB | (1) 1M x | (1) 4M x | (1) 256K x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 22MB | (1) 1M x | (1) 4M x | (1) 256K x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 24MB | (1) 1M x | (1) 4M x | (1) 1M x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 25MB | (1) 1M x | (1) 4M x | (1) 1M x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 28MB | (1) 1M x | (1) 4M x | (1) 1M x | (1) 1M x | | | 36 | 36 | 36 | 36 | |---------+------------+------------+------------+-----------| | 36MB | (1) 1M x | (1) 4M x | (1) 4M x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 36MB | (1) 1M x | (1) 8M x | NONE | NONE | | | 36 | 36 | | | |---------+------------+------------+------------+-----------| | 37MB | (1) 1M x | (1) 4M x | (1) 4M x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 37MB | (1) 1M x | (1) 8M x | (1) 256K x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 38MB | (1) 1M x | (1) 8M x | (1) 256K x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 40MB | (1) 1M x | (1) 4M x | (1) 4M x | (1) 1M x | | | 36 | 36 | 36 | 36 | |---------+------------+------------+------------+-----------| | 40MB | (1) 1M x | (1) 8M x | (1) 1M x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 41MB | (1) 1M x | (1) 8M x | (1) 1M x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 44MB | (1) 1M x | (1) 8M x | (1) 1M x | (1) 1M x | | | 36 | 36 | 36 | 36 | |---------+------------+------------+------------+-----------| | 52MB | (1) 1M x | (1) 4M x | (1) 4M x | (1) 4M x | | | 36 | 36 | 36 | 36 | |---------+------------+------------+------------+-----------| | 52MB | (1) 1M x | (1) 8M x | (1) 4M x | NONE | | | 36 | 36 | 36 | | |---------+------------+------------+------------+-----------| | 53MB | (1) 1M x | (1) 8M x | (1) 4M x | (1) 256K | | | 36 | 36 | 36 | x 36 | |---------+------------+------------+------------+-----------| | 56MB | (1) 1M x | (1) 8M x | (1) 4M x | (1) 1M x | | | 36 | 36 | 36 | 36 | |---------+------------+------------+------------+-----------| | 64MB | (1) 1M x | (1) 8M x | (1) 4M x | (1) 4M x | | | 36 | 36 | 36 | 36 | |------------------------------------------------------------| | Note: When 64MB of memory is installed, Bank 0 is ignored. | | Do not remove the 1M x 36 from Bank 0. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION | |------------------------------------------------------------| | Type | P2 | P3 | P4 | P6 | P7 | |---------------+--------+--------+--------+--------+--------| | 80486SX-25 | 1 & 2 | 1 & 2 | 3 & 4 | 1 & 2 | 1 & 2 | |---------------+--------+--------+--------+--------+--------| | 80486SX-33 | 1 & 2 | 1 & 2 | 3 & 4 | 1 & 2 | 2 & 3 | |---------------+--------+--------+--------+--------+--------| | 80487SX-25 | 1 & 2 | 1 & 2 | 3 & 4 | 1 & 2 | 1 & 2 | |---------------+--------+--------+--------+--------+--------| | 80486DX-25 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | |---------------+--------+--------+--------+--------+--------| | 80486DX-33 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | |---------------+--------+--------+--------+--------+--------| | 80486SX2-66 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | |---------------+--------+--------+--------+--------+--------| | 80486DX2-50 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | |---------------+--------+--------+--------+--------+--------| | 80486DX2-66 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | |---------------+--------+--------+--------+--------+--------| | ODP | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | N/A | |---------------+--------+--------+--------+--------+--------| | ODPR | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | N/A | |---------------+--------+--------+--------+--------+--------| | Pentium ODP | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | N/A | |------------------------------------------------------------| | Note: N/A - jumper setting depends on processor | | speed. Pins designated should be in the closed | | position. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | Speed | P7 | |----------------------------+-------------------------------| | 25MHz | Pins 1 & 2 closed | |----------------------------+-------------------------------| | 33MHz | Pins 2 & 3 closed | |----------------------------+-------------------------------| | 50iMHz | Pins 1 & 2 closed | |----------------------------+-------------------------------| | 66iMHz | Pins 2 & 3 closed | +------------------------------------------------------------+