UNITRON COMPUTER, INC. 3486 SYSTEM TYPE 16 Processor 80386SX/CX486SLC Processor Speed 16/20/25/33MHz Chip Set OPTI Max. Onboard DRAM 16MB Cache None BIOS Phoenix Dimensions 254mm x 218mm I/O Options Floppy drive interface, game port, IDE interface, parallel port, serial ports (2), VGA port NPU Options 80387SX [Image] CONNECTIONS Purpose Location Purpose Location Game port CN1 IDE interface J23 VGA port CN2 IDE interface LED J24 Parallel port CN3 Turbo LED J26 Serial port 2 CN4 Turbo LED J30 Serial port 1 CN5 Power LED & keylock J31 Chassis fan power J13 Floppy drive interface J32 Reset switch J14 Riser Card SL1 Speaker J21 USER CONFIGURABLE SETTINGS Function Jumper Position » Hard drive installed J1 pins 2 & 3 closed Hard drive not installed J1 pins 1 & 2 closed » Serial port B enabled J3 pins 1 & 2 closed Serial port B disabled J3 pins 2 & 3 closed » Game port enabled J4 pins 1 & 2 closed Game port disabled J4 pins 2 & 3 closed » Parallel port enabled J7 pins 1 & 2 closed Parallel port disabled J7 pins 2 & 3 closed » Serial port A enabled J8 pins 1 & 2 closed Serial port A disabled J8 pins 2 & 3 closed » Parallel port select LPT1 J9 pins 1 & 2 closed Parallel port select LPT2 J9 pins 2 & 3 closed » Monitor type select color J11 pins 1 & 2 closed Monitor type select monochrome J11 pins 2 & 3 closed » Display type select non J15 Open interlaced Display type select intrlaced J15 Closed » NPU synchronous with CPU J16 Open NPU asynchronous with CPU J16 Closed » Floppy drive interface enabled J25 pins 1 & 2 closed Floppy drive interface disabled J25 pins 2 & 3 closed » IDE interface enabled J27 pins 1 & 2 closed IDE interface disabled J27 pins 2 & 3 closed » Turbo LED enabled on J26 (System J29 pins 1 & 2 M) closed Floppy drive LED enabled on J26 J29 pins 2 & 3 (System B; open J30) closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 512KB (2) 256K x 9 NONE NONE NONE 1MB (2) 256K x 9 (2) 256K x 9 NONE NONE 2MB (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 2MB (2) 1M x 9 NONE NONE NONE 3MB (2) 256K x 9 (2) 1M x 9 (2) 256K x 9 NONE 4MB (2) 1M x 9 (2) 1M x 9 NONE NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 5MB (2) 256K x 9 (2) 1M x 9 (2) 256K x 9 (2) 1M x 9 6MB (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 NONE 8MB (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 8MB (2) 4M x 9 NONE NONE NONE 12MB (2) 1M x 9 (2) 4M x 9 (2) 1M x 9 NONE 16MB (2) 4M x 9 (2) 4M x 9 NONE NONE CPU TYPE CONFIGURATION Type J28 80386SX Open 80486SLC pins 1 & 2, 3 & 4, 5 & 6 closed CPU SPEED CONFIGURATION Speed J35 J38 16MHz pins 1 & 2 closed pins 1 & 2 closed 20MHz pins 1 & 2 closed pins 2 & 3 closed 25MHz pins 2 & 3 closed pins 1 & 2 closed 33MHz pins 2 & 3 closed pins 2 & 3 closed FLOPPY DRIVE CONFIGURATION Type J17 J18 J19 J20 System B pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed closed System M pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed Note: System B- drive B has twisted cable; drive A has straight cable. System M- drive B has straight cable; drive A has twisted cable SERIAL PORT CONFIGURATION Port 1 J10 COM1 pins 1 & 2 closed COM3 pins 2 & 3 closed SERIAL PORT CONFIGURATION Port 2 J2 COM2 pins 1 & 2 closed COM4 pins 2 & 3 closed VRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 256KB (2) 44256 NONE NONE NONE 512KB (2) 44256 (2) 44256 NONE NONE 1MB (2) 44256 (2) 44256 (2) 44256 (2) 44256 ON BOARD VGA CONFIGURATION Setting J36 J37 Enabled Closed Closed Disabled Open Open