ROBOTECH, INC. GMB-486UNP Processor CX486S/SL80486SX/80486SX/AM486DX-PLUS/AM486DXL/CX486DX/ SL80486DX/80486DX/AM486DX2-PLUS/AM486DXL2/CX486DX2/ SL80486DX2/80486DX2/80486DX4/P24D/ Pentium Overdrive Processor 20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Max. 128MB Onboard DRAM Cache 128/256/512KB BIOS Award Dimensions 260mm x 220mm I/O 32-bit VESA local bus slots (3), green PC connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Reset switch J6 Turbo switch J3 Power LED & keylock J7 Turbo LED J4 Green PC connector JP27 Speaker J5 32-bit VESA local bus SL1 - SL3 slots USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation JP16 pins 2 & 3 closed CMOS memory clear JP16 pins 1 & 2 closed » Monitor type select JP17 Open monochrome/EGA/VGA Monitor type select EGA JP17 Closed » CPU clock delay select CLKIN delay JP20 pins 2 & 3 for CPUCLK closed CPU clock delay select CLKIN and JP20 pins 1 & 2 CPUCLK same phase closed » Green PC break switch enabled JP26 Open Green PC break switch disabled JP26 Closed » Factory configured - do not alter JP32 pins 1 & 2 closed » Factory configured - do not alter JP35 pins 2 & 3 closed » Keyboard controller clock select JPX1 Open asynchronous Keyboard controller clock select JPX1 Closed synchronous 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 2MB (1) 512K x NONE NONE NONE 36 4MB (1) 256K x (1) 256K x (1) 512K x NONE 36 36 36 4MB (1) 512K x (1) 512K x NONE NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 6MB (1) 256K x (1) 256K x (1) 1M x 36 NONE 36 36 6MB (1) 512K x (1) 1M x 36 NONE NONE 36 8MB (1) 256K x (1) 256K x (1) 512K x (1) 1M x 36 36 36 36 8MB (1) 512K x (1) 512K x (1) 1M x 36 NONE 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB (1) 2M x 36 NONE NONE NONE 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 12MB (1) 512K x (1) 512K x (1) 1M x 36 (1) 1M x 36 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 12MB (1) 1M x 36 (1) 2M x 36 NONE NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 2M x 36 (1) 2M x 36 NONE NONE 16MB (1) 4M x 36 NONE NONE NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 NONE 17MB (1) 256K x (1) 4M x 36 NONE NONE 36 18MB (1) 256K x (1) 256K x (1) 4M x 36 NONE 36 36 18MB (1) 512K x (1) 4M x 36 NONE NONE 36 20MB (1) 512K x (1) 512K x (1) 4M x 36 NONE 36 36 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 20MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 NONE 24MB (1) 512K x (1) 512K x (1) 1M x 36 (1) 4M x 36 36 36 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 24MB (1) 2M x 36 (1) 4M x 36 NONE NONE 28MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB (1) 8M x 36 NONE NONE NONE 32MB (1) 2M x 36 (1) 2M x 36 (1) 4M x 36 NONE 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 36MB (1) 512K x (1) 512K x (1) 4M x 36 (1) 4M x 36 36 36 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 NONE 36MB (1) 1M x 36 (1) 8M x 36 NONE NONE 40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 40MB (1) 1M x 36 (1) 1M x 36 (1) 8M x 36 NONE 40MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 48MB (1) 4M x 36 (1) 8M x 36 NONE NONE 48MB (1) 2M x 36 (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 2M x 36 (1) 2M x 36 (1) 8M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 16M x 36 NONE NONE NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 NONE 64MB (1) 8M x 36 (1) 8M x 36 NONE NONE 65MB (1) 256K x (1) 16M x 36 NONE NONE 36 68MB (1) 1M x 36 (1) 16M x 36 NONE NONE 68MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 NONE 72MB (1) 1M x 36 (1) 1M x 36 (1) 16M x NONE 36 72MB (1) 1M x 36 (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 80MB (1) 4M x 36 (1) 16M x 36 NONE NONE 80MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 NONE 80MB (1) 2M x 36 (1) 2M x 36 (1) 8M x 36 (1) 8M x 36 96MB (1) 4M x 36 (1) 4M x 36 (1) 16M x NONE 36 96MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 NONE 128MB (1) 16M x 36 (1) 16M x 36 NONE NONE 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 256KB (4) 64K x 8 NONE (1) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP1 JP2 JP3 JP4 JP33 128KB 1 & 2 1 & 2 1 & 2, 3 1 & 2 2 & 3 & 4 256KB 2 & 3 2 & 3 2 & 3, 4 1 & 2 2 & 3 & 5 256KB 1 & 2 2 & 3 1 & 2, 3 1 & 2 1 & 2 & 4 512KB 1 & 2 2 & 3 1 & 2, 3 2 & 3 2 & 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP8 JP10 JP11 JP12 JP13 CX486S 2 & 3 2 & 3 Open 2 & 3, 4 Open & 5 SL80486SX 2 & 3 2 & 3 Open 3 & 4 1 & 2 80486SX 2 & 3 2 & 3 Open Open Open AM486DX-PLUS 1 & 2, 2 & 3 3 & 4 3 & 4 4 & 5 3 & 4 AM486DXL 1 & 2, 2 & 3 1 & 2, 3 Open Open 3 & 4 & 4 CX486DX 1 & 2, 2 & 3 3 & 4 2 & 3 Open 3 & 4 SL80486DX 1 & 2, 2 & 3 3 & 4 3 & 4 1 & 2 3 & 4 80486DX 1 & 2, 2 & 3 3 & 4 Open Open 3 & 4 AM486DX2-PLUS 1 & 2, 2 & 3 3 & 4 3 & 4 4 & 5 3 & 4 AM486DXL2 1 & 2, 2 & 3 1 & 2, 3 Open Open 3 & 4 & 4 CX486DX2 1 & 2, 2 & 3 3 & 4 2 & 3 Open 3 & 4 SL80486DX2 1 & 2, 2 & 3 3 & 4 3 & 4 1 & 2 3 & 4 80486DX2 1 & 2, 2 & 3 3 & 4 Open Open 3 & 4 80486DX4 1 & 2, 2 & 3 3 & 4 3 & 4 1 & 2 3 & 4 P24D 1 & 2, 1 & 2 3 & 4 1 & 2, 3 2 & 3 3 & 4 & 4 Pentium Overdrive 1 & 2, 1 & 2 2 & 3 3 & 4 Open 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP14 JP15 JP21 JP22 JP24 CX486S 1 & 2, 2 & 3 1 & 2 2 & 3 2 & 3 3 & 4 SL80486SX 2 & 3 4 & 5 2 & 3 1 & 2 Open 80486SX Open Open 2 & 3 1 & 2 Open AM486DX-PLUS 2 & 3 4 & 5 1 & 2 1 & 2 Open AM486DXL Open Open 1 & 2 2 & 3 3 & 4 CX486DX 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 SL80486DX 2 & 3 4 & 5 2 & 3 1 & 2 Open 80486DX Open Open 2 & 3 1 & 2 Open AM486DX2-PLUS 2 & 3 4 & 5 1 & 2 1 & 2 Open AM486DXL2 Open Open 1 & 2 2 & 3 3 & 4 CX486DX2 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 SL80486DX2 2 & 3 4 & 5 2 & 3 1 & 2 Open 80486DX2 Open Open 2 & 3 1 & 2 Open 80486DX4 2 & 3 4 & 5 2 & 3 1 & 2 Open P24D 2 & 3 4 & 5 1 & 2 1 & 2 Open Pentium Overdrive 2 & 3 1 & 2 1 & 2 1 & 2 1 & 2 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP25 JP30 JP31 JP34 JP36 CX486S 2 & 3 Open Open 1 & 2 Closed SL80486SX Open Open Open 1 & 2 Closed 80486SX Open Open Open Open Closed AM486DX-PLUS 1 & 2 Open 2 & 3 1 & 2 Closed AM486DXL Open Open Open 2 & 3 Closed CX486DX 2 & 3 Open Open 1 & 2 Closed SL80486DX Open Open Open 1 & 2 Closed 80486DX Open Open Open Open Closed AM486DX2-PLUS 1 & 2 Open 2 & 3 1 & 2 Closed AM486DXL2 Open Open Open 2 & 3 Closed CX486DX2 2 & 3 Open Open 1 & 2 Closed SL80486DX2 Open Open Open 1 & 2 Closed 80486DX2 Open Open Open Open Closed 80486DX4 3 & 4 Open Open 1 & 2 Open P24D 1 & 2 Closed 1 & 2 1 & 2 Closed Pentium 1 & 2 Open Open 1 & 2 Closed Overdrive Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION (AV9107) Speed JP5 JP6 JP7 20MHz Closed Open Closed 25MHz Closed Closed Open 33MHz Open Closed Closed 40MHz Closed Open Open 50iMHz Closed Closed Open 50MHz Open Open Closed 66iMHz Open Closed Closed 75iMHz Closed Closed Open 100iMHz Open Closed Closed CPU SPEED CONFIGURATION (MX-8315) Speed JP5 JP6 JP7 20MHz Open Open Open 25MHz Open Closed Open 33MHz Closed Closed Closed 40MHz Open Closed Closed 50iMHz Open Closed Open 50MHz Closed Open Open 66iMHz Closed Closed Closed 75iMHz Open Closed Open 100iMHz Closed Closed Closed VESA WAIT STATE CONFIGURATION Wait states JP28 0 wait states pins 1 & 2 closed 1 wait state pins 2 & 3 closed BUS SPEED CONFIGURATION CPU speed JP29 <= 33MHz pins 1 & 2 closed > 33MHz pins 2 & 3 closed