UNITRON COMPUTER, INC. ====================== 3/486 MAINBOARD Processor 80386DX/CX486DLC/80486SX/80486DX/ODP486SX/80486DX2 Processor 25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set UMC Max. 32MB Onboard DRAM SRAM Cache 32/64/128/256KB BIOS AMI/Phoenix Dimensions 230mm x 218mm I/O Options 32-bit proprietary local bus slot, 32-bit VESA local bus slot NPU Options 80387DX/CX487DLC +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |------------------+----------+-------------------+----------| | External battery | J1 | Speaker | J29 | |------------------+----------+-------------------+----------| | Turbo LED | J25 | Power LED & | J30 | | | | keylock | | |------------------+----------+-------------------+----------| | Reset switch | J26 | 32-bit local bus | S1 | | | | slot | | |------------------+----------+-------------------+----------| | Turbo switch | J28 | 32-bit VESA local | S2 | | | | bus slot | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper | Position | |--------------------------------------+--------+------------| |>> | Monitor type select color | J6 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | Monitor type select monochrome | J6 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Parity enabled | J9 | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | Parity disabled | J9 | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | J21 | Open | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | J31 | Open | | | alter | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | |------------------+--------------------+--------------------| | 1MB | (4) 256K x 9 | NONE | |------------------+--------------------+--------------------| | 2MB | (4) 256K x 9 | (4) 256K x 9 | |------------------+--------------------+--------------------| | 4MB | (4) 1M x 9 | NONE | |------------------+--------------------+--------------------| | 5MB | (4) 256K x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 8MB | (4) 1M x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 16MB | (4) 4M x 9 | NONE | |------------------+--------------------+--------------------| | 20MB | (4) 4M x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 32MB | (4) 4M x 9 | (4) 4M x 9 | +------------------------------------------------------------+ +------------------------------------------------------------+ | SRAM CONFIGURATION | |------------------------------------------------------------| | Size | Cache | Location | TAG | |------------+---------------+---------------+---------------| | 32KB | (8) 8K x 8 | Bank 0 | (1) 8K x8 | |------------+---------------+---------------+---------------| | 64KB | (8) 8K x 8 | Banks 0 & 1 | (1) 8K x 8 | |------------+---------------+---------------+---------------| | 128KB | (4) 32K x 8 | Bank 0 | (1) 8K x 8 | |------------+---------------+---------------+---------------| | 256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 32K x 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | SRAM JUMPER CONFIGURATION | |------------------------------------------------------------| | Size | J7 | J8 | J11 | J12 | J13 | J17 | J18 | | | | | | | & | | | | | | | | | J19 | | | |-------+-------+-------+-------+-------+------+------+------| | 32KB | Open | pins | pins | pins | pins | pins | pins | | | | 2 & 3 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & | | | | | | | 2 | 2 | 2 | |-------+-------+-------+-------+-------+------+------+------| | 64KB | Open | pins | pins | pins | pins | pins | pins | | | | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & | 2 & | | | | | | | 2 | 2 | 3 | |-------+-------+-------+-------+-------+------+------+------| | 128KB | pins | pins | pins | pins | pins | pins | pins | | | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & | 1 & | 2 & | | | | | | | 3 | 2 | 3 | |-------+-------+-------+-------+-------+------+------+------| | 256KB | pins | pins | pins | pins | pins | pins | pins | | | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 | 2 & | 2 & | 2 & | | | | | | | 3 | 3 | 3 | |------------------------------------------------------------| | Note: Pins designated should in the closed position. | +------------------------------------------------------------+ . +------------------------------------------------------------+ | VESA MODE CONFIGURATION | |------------------------------------------------------------| | Mode | J22 | J23 | J24 | |-----------+------------------+--------------+--------------| | Master | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 | | | closed | closed | closed | |-----------+------------------+--------------+--------------| | Slave | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | | | closed | closed | closed | |------------------------------------------------------------| | Note: VESA master mode can only be enabled when IC PAL | | 16R4 is installed. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU TYPE CONFIGURATION | |------------------------------------------------------------| | CPU Type | J10 | J14 | J15 | J16 | J20 | |---------------+--------+--------+--------+--------+--------| | 80386DX with | pins 1 | N/A | pins 1 | N/A | N/A | | NPU | & 2 | | & 2 | | | |---------------+--------+--------+--------+--------+--------| | 80386DX w/o | pins 1 | N/A | pins 2 | N/A | N/A | | NPU | & 2 | | & 3 | | | |---------------+--------+--------+--------+--------+--------| | 80486SX PQFP | pins 2 | Open | pins 2 | pins 2 | Open | | | & 3 | | & 3 | & 3 | | |---------------+--------+--------+--------+--------+--------| | 80486SX PGA | pins 2 | Open | pins 2 | pins 2 | pins 2 | | | & 3 | | & 3 | & 3 | & 3 | |---------------+--------+--------+--------+--------+--------| | 80486SX | pins 2 | pins 2 | pins 2 | pins 1 | pins 1 | | | & 3 | & 3 | & 3 | & 2 | & 2 | |---------------+--------+--------+--------+--------+--------| | 80486SX + | pins 2 | pins 1 | pins 2 | pins 1 | pins 2 | | 487SX OD | & 3 | & 2 | & 3 | & 2, 3 | & 3 | | | | | | & 4 | | |---------------+--------+--------+--------+--------+--------| | 80486SX + | pins 2 | pins 1 | pins 2 | pins 1 | pins 2 | | 486DX PGA | & 3 | & 2 | & 3 | & 2, 3 | & 3 | | | | | | & 4 | | |---------------+--------+--------+--------+--------+--------| | 80486DX | pins 2 | pins 2 | pins 2 | pins 1 | pins 2 | | | & 3 | & 3 | & 3 | & 2, 3 | & 3 | | | | | | & 4 | | |---------------+--------+--------+--------+--------+--------| | 80486DX2 | pins 2 | pins 2 | pins 2 | pins 1 | pins 2 | | | & 3 | & 3 | & 3 | & 2, 3 | & 3 | | | | | | & 4 | | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | | ICS2494 ( | | | | CPU Clock | | | | Generator) | | |--------+-------------+-------------------------------------| | Speed | J2 | J3 | J4 | J5 | |--------+-------------+------------+------------+-----------| | 25MHz | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 1 & | | | closed | closed | closed | 2 closed | |--------+-------------+------------+------------+-----------| | 33MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 1 & | | | closed | closed | closed | 2 closed | |--------+-------------+------------+------------+-----------| | 40MHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 1 & | | | closed | closed | closed | 2 closed | |--------+-------------+------------+------------+-----------| | 50iMHz | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 1 & | | | closed | closed | closed | 2 closed | |--------+-------------+------------+------------+-----------| | 50MHz | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 1 & | | | closed | closed | closed | 2 closed | |--------+-------------+------------+------------+-----------| | 66iMHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 1 & | | | closed | closed | closed | 2 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | CPU SPEED CONFIGURATION | |------------------------------------------------------------| | | IMISC425 ( | | | | CPU Clock | | | | Generator) | | |--------+-------------+-------------------------------------| | Speed | J2 | J3 | J4 | J5 | |--------+-------------+------------+------------+-----------| | 25MHz | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 1 & | | | closed | closed | closed | 2 closed | |--------+-------------+------------+------------+-----------| | 33MHz | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 | pins 1 & | | | closed | closed | closed | 2 closed | |--------+-------------+------------+------------+-----------| | 40MHz | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 2 & | | | closed | closed | closed | 3 closed | |--------+-------------+------------+------------+-----------| | 50iMHz | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 1 & | | | closed | closed | closed | 2 closed | |--------+-------------+------------+------------+-----------| | 50MHz | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 2 & | | | closed | closed | closed | 3 closed | |--------+-------------+------------+------------+-----------| | 66iMHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 2 & | | | closed | closed | closed | 3 closed | +------------------------------------------------------------+