ROBOTECH, INC. COBRA-RT VER. B/C/D/E Processor CX486S/80486SX/CX487S/80487SX/80486DX/ODP486SX/80486DX2/ 80486DX4/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set SIS Max. Onboard64MB DRAM Cache 32/64/128/256KB BIOS AMI Dimensions 254mm x 220mm I/O Options 32-bit VESA local bus slots (3), green PC connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Daughter board BC20 Reset switch JP15D interface External battery JP8 Turbo switch JP15E Speaker JP15A +5vDC ground JP15F Power LED & keylock JP15B Green PC connector JP34 Turbo LED JP15C 32-bit VESA local bus SL1 - SL3 slots USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation JP3 Open CMOS memory clear JP3 Closed » Power good signal detect from JP11 pins 1 & 2 power supply closed Power good signal detect from JP11 pins 2 & 3 board closed » CPU type select 1 CPU on board JP12 pins 1 & 2 (PQFP or PGA) closed CPU type select 2 CPU on board JP12 pins 2 & 3 (PGA enabled PQFP disabled) closed » Green PC mode enabled JP14 pins 2 & 3 closed Green PC mode disabled JP14 pins 1 & 2 closed » VESA bus address type select JP19 pins 1 & 2 asynchronous (40/50mhz CPU) closed VESA bus address type select JP19 pins 2 & 3 synchronous closed » VESA bus data type select JP20 pins 1 & 2 synchronous closed VESA bus data type select JP20 pins 2 & 3 aynchronous closed » VGA card select normal JP28 pins 1 & 2 closed VGA card select Weitek Power 9000 JP28 pins 2 & 3 VGA only closed » Factory configured - do not alter JP36 Open » Mouse COM port select COM2 JP39 pins 1 & 2 closed Mouse COM port select COM1 JP39 pins 2 & 3 closed » 80486DX4 CPU speed select 3x JP41 pins 1 & 2 closed 80486DX4 CPU speed select 2x JP41 pins 2 & 3 closed 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 17MB (4) 256K x 9 (4) 4M x 9 20MB (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 64MB (4) 16M x 9 NONE CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 32KB (4) 8K x 8 NONE (1) 8K x 8 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 16K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP5 JP6 JP7 JP9 JP10 32KB 2 & 3 Open Open Open Open 64KB 1 & 2 Open Open Closed Open 128KB 2 & 3 2 & 3 Closed Closed Open 256KB 1 & 2 1 & 2 Closed Closed 2 & 3 256KB 1 & 2 1 & 2 Closed Closed 1 & 2 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP16 JP17 CX486S Open pins 2 & 3 closed 80486SX Open pins 2 & 3 closed 80487SX pins 2 & 3 closed pins 1 & 2, 3 & 4 closed ODP486SX pins 2 & 3 closed pins 1 & 2, 3 & 4 closed 80486DX/DX2/DX4 pins 1 & 2 closed pins 1 & 2, 3 & 4 closed Pentium Overdrive pins 1 & 2 closed pins 1 & 2, 3 & 4 closed CPU SPEED CONFIGURATION Speed JP21 JP22 JP23 JP27 25MHz Closed Open Closed Open 33MHz Closed Closed Open Open 40MHz Open Open Closed Closed 50iMHz Closed Open Closed Open 50MHz Open Closed Open Closed 66iMHz Closed Closed Open Open CPU VOLTAGE CONFIGURATION Voltage JP42 JP44 3.3v (80486DX4) Open Open 5v pins 3 & 5, 4 & 6 pins 1 & 2, 3 & 4 closed closed VESA BUS CLOCK CONFIGURATION Setting JP25 JP26 JP29 Synchronous pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed Asynchronous pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed Note: these settings are valid for SL1, SL2 & SL3. CIRRUS LOGIC VIDEO CARD CONFIGURATION (VER. AB) CPU speed JP19 JP20 25MHz pins 2 & 3 closed pins 1 & 2 closed 33MHz pins 2 & 3 closed pins 1 & 2 closed 40MHz pins 1 & 2 closed pins 1 & 2 closed 50iMHz pins 2 & 3 closed pins 1 & 2 closed 50MHz pins 1 & 2 closed pins 1 & 2 closed 66iMHz pins 2 & 3 closed pins 1 & 2 closed CIRRUS LOGIC VIDEO CARD CONFIGURATION (VER. AC) CPU speed JP19 JP20 25MHz pins 2 & 3 closed pins 1 & 2 closed 33MHz pins 2 & 3 closed pins 1 & 2 closed 40MHz pins 1 & 2 closed pins 1 & 2 closed 50iMHz pins 2 & 3 closed pins 1 & 2 closed 50MHz pins 2 & 3 closed pins 2 & 3 closed 66iMHz pins 2 & 3 closed pins 1 & 2 closed