AST RESEARCH, INC. ================== BRAVO LC 4/100T Processor 80486SX/SL80486DX/SL80486DX2/SL80486DX4/P24T Processor 25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Video Chip Cirrus Logic Set Maximum 64MB Onboard Memory Maximum 1MB Video Memory Cache 64/256KB BIOS Unidentified Dimensions 355mm x 304mm I/O 32-bit VESA local bus slot, floppy drive interface, IDE Options interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through connector, VGA port NPU None Options +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |-------------------+----------+------------------+----------| | PS/2 mouse port | CN1 | IDE interface | J22 | |-------------------+----------+------------------+----------| | Serial port | CN2 | Floppy drive | J24 | | | | interface | | |-------------------+----------+------------------+----------| | Serial port | CN3 | Speaker | J27 | |-------------------+----------+------------------+----------| | Parallel port | CN4 | Chassis fan | J28 | | | | power | | |-------------------+----------+------------------+----------| | VGA port | CN5 | Front panel LEDs | J29 | |-------------------+----------+------------------+----------| | 8514 video pass | J19 | 32-bit VESA | SL1 | | through connector | | local bus slot | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Label | Position | |---------------------------------------+-------+------------| |>> | Parallel port IRQ select IRQ7 | E2 | Pins 1 & 2 | | | | | closed | |---+-----------------------------------+-------+------------| | | Parallel port IRQ select IRQ5 | E2 | Pins 2 & 3 | | | | | closed | |---+-----------------------------------+-------+------------| |>> | On board video enabled | E7 | Closed | |---+-----------------------------------+-------+------------| | | On board video disabled | E7 | Open | |---+-----------------------------------+-------+------------| |>> | Monitor type select color | E8 | Closed | |---+-----------------------------------+-------+------------| | | Monitor type select monochrome | E8 | Open | |---+-----------------------------------+-------+------------| |>> | Factory configured - do not alter | E9 | Closed | |---+-----------------------------------+-------+------------| |>> | Password normal operation | E10 | Closed | |---+-----------------------------------+-------+------------| | | Password clear | E10 | Open | |---+-----------------------------------+-------+------------| |>> | Factory configured - do not alter | E11 | Open | |---+-----------------------------------+-------+------------| |>> | Factory configured - do not alter | E16 | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | 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) 1M x 36 | (1) 256K x | None | None | | | | 36 | | | |------+-------------+-------------+------------+------------| | 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | None | | | | 36 | 36 | | |------+-------------+-------------+------------+------------| | 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x | | | | 36 | 36 | 36 | |------+-------------+-------------+------------+------------| | 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 | | |------+-------------+-------------+------------+------------| | 13MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x | | | | | 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 | |------+-------------+-------------+------------+------------| | 17MB | (1) 4M x 36 | (1) 256K x | None | None | | | | 36 | | | |------+-------------+-------------+------------+------------| | 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | None | | | | 36 | 36 | | |------+-------------+-------------+------------+------------| | 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x | | | | 36 | 36 | 36 | |------+-------------+-------------+------------+------------| | 20MB | (1) 4M x 36 | (1) 1M x 36 | None | None | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION (CON'T) | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | |------+-------------+-------------+------------+------------| | 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | None | | | | | 36 | | |------+-------------+-------------+------------+------------| | 25MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x | | | | | 36 | 36 | |------+-------------+-------------+------------+------------| | 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 | | |------+-------------+-------------+------------+------------| | 37MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 256K x | | | | | 36 | 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 | |------+-------------+-------------+------------+------------| | 52MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M 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 | TAG | |------------------+--------------------+--------------------| | 64KB | (8) 8K x 8 | (1) 8K x 8 | |------------------+--------------------+--------------------| | 256KB | (8) 32K x 8 | (1) 32K x 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | E12 | E14 | |-------------------+--------------------+-------------------| | 64KB | Open | Open | |-------------------+--------------------+-------------------| | 256KB | Closed | Closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CACHE TYPE CONFIGURATION | |------------------------------------------------------------| | Type | E1 | E6 | E20 | |---------------+-----------------+-----------------+--------| | Write through | Pins 1 & 2 | Pins 1 & 2 | Open | | | closed | closed | | |---------------+-----------------+-----------------+--------| | Write back | Pins 2 & 3 | Pins 2 & 3 | Closed | | | closed | closed | | |------------------------------------------------------------| | Note: E20 may not be present on all boards. | +------------------------------------------------------------+ +------------------------------------------------------------+ | VIDEO MEMORY CONFIGURATION (1994 CONFIGURATION) | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | |----------------+---------------------+---------------------| | 512KB | (4) 256K x 4 | None | |----------------+---------------------+---------------------| | 1MB | (4) 256K x 4 | (4) 256K x 4 | |------------------------------------------------------------| | Note: Bank 0 is factory installed and is not configurable. | | On some revisions, Bank 1 may be factory installed. Board | | shown uses this configuration. | +------------------------------------------------------------+ +------------------------------------------------------------+ | VIDEO MEMORY CONFIGURATION (1995 CONFIGURATION) | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | |---------------+----------------------+---------------------| | 512KB | (1) 256K x 16 | None | |---------------+----------------------+---------------------| | 1MB | (1) 256K x 16 | (1) 256K x 16 | |------------------------------------------------------------| | Note: Bank 0 is factory installed and is not configurable. | | On some revisions, Bank 1 may be factory installed. If | | board is a 1995 configuration, install the upgrade chip in | | socket U802. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED SELECTION | |------------------------------------------------------------| | Speed | E15 | |-------------------------------+----------------------------| | 25MHz | Closed | |-------------------------------+----------------------------| | 33MHz | Open | |-------------------------------+----------------------------| | 50iMHz | Closed | |-------------------------------+----------------------------| | 66iMHz | Open | |-------------------------------+----------------------------| | 75iMHz | Closed | |-------------------------------+----------------------------| | 100iMHz | Open | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE SELECTION | |------------------------------------------------------------| | Type | E3 | E4 | E5 | E13 | |------------+------------+------------+------------+--------| | 80486SX | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Open | | (PQFP) | closed | closed | closed | | |------------+------------+------------+------------+--------| | 80486SX | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Closed | | (PGA) | closed | closed | closed | | |------------+------------+------------+------------+--------| | SL80486DX | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Closed | | | closed | closed | closed | | |------------+------------+------------+------------+--------| | SL80486DX2 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Closed | | | closed | closed | closed | | |------------+------------+------------+------------+--------| | SL80486DX4 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Closed | | | closed | closed | closed | | |------------+------------+------------+------------+--------| | P24T | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Closed | | | closed | closed | closed | | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE SELECTION | |------------------------------------------------------------| | Type | E17 | E18 | E19 | |-----------+-----------------+---------------+--------------| | Cyrix | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | | | closed | closed | closed | |-----------+-----------------+---------------+--------------| | Intel | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | | | closed | closed | closed | |------------------------------------------------------------| | Note: These jumpers may not be present on all boards. If | | they are not, board only supports processor that was | | shipped from the factory. | +------------------------------------------------------------+