GEMLIGHT COMPUTER, LTD. GMB-486SG (VER. 6.02) Processor CX486S/UMCU5/80486SX/SL80486SX/CX486DX/80486DX/ SL80486DX/CX486DX2/AM486DX2/(SL)AM486DX2/80486DX2/ SL80486DX2/AM486DX4/(SL)AM486DX4/80486DX4/P24D/P24T Processor 20/25/33/40/50(internal)/50/60/66(internal)/75(internal)/ Speed 80(internal)/100(internal)MHz Chip Set Unidentified Video Chip None Set Maximum 128MB Onboard Memory Maximum None Video Memory Cache 128/256/512KB BIOS Award Dimensions 250mm x 220mm I/O Options 32-bit VESA local bus slots (3), green PC connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Reset switch J6 Green PC connector J2 Power LED & keylock J7 Turbo switch J3 Green PC connector JP26 Turbo LED J4 Green PC LED JP27 Speaker J5 32-bit VESA local bus SL1 – SL3 slots USER CONFIGURABLE SETTINGS Function Label Position » Turbo enabled J3 Pins 2 & 3 closed Turbo disabled J3 Pins 1 & 2 closed » CMOS memory normal operation JP16 Pins 1 & 2 closed CMOS memory clear JP16 Pins 2 & 3 closed » Monitor type select JP17 Open monochrome/VGA/EGA Monitor type select EGA JP17 Closed » CLKIN delay for CPUCLK JP20 Pins 2 & 3 closed CLKIN & CPUCLK same phase JP20 Pins 1 & 2 closed 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 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 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 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 (A) (4) 32K x 8 (4) 32K x 8 (1) 16K/32K x 8 256KB (B) (4) 64K x 8 None (1) 16K/32K x 8 512KB (4) 128K x 8 None (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP1 JP3 JP33 128KB Pins 1 & 2 Pins 1 & 2, 3 & Pins 2 & 3 closed closed 4 closed 256KB (A) Pins 2 & 3 Pins 2 & 3, 4 & Pins 2 & 3 closed closed 5 closed 256KB (B) Pins 1 & 2 Pins 1 & 2, 3 & Pins 1 & 2 closed closed 4 closed 512KB Pins 1 & 2 Pins 1 & 2, 3 & Pins 2 & 3 closed closed 4 closed CACHE TAG JUMPER CONFIGURATION Cache TAG JP2 JP4 128KB (1) 8K x 8 Pins 1 & 2 Pins 1 & 2 closed closed 256KB (A,B) (1) 16K x 8 Pins 3 & 4 Open closed 256KB (A,B) (1) 32K x 8 Pins 2 & 3 Pins 1 & 2 closed closed 512KB (1) 32K x 8 Pins 2 & 3 Pins 2 & 3 closed closed CPU SPEED SELECTION (AV9107-03) 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 80iMHz Closed Open Open 100iMHz Open Closed Closed CPU SPEED SELECTION (MS-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 80iMHz Open Closed Closed 100iMHz Closed Closed Closed CPU TYPE SELECTION Type JP8 JP10 JP11 JP12 JP13 CX486S 2 & 3 2 & 3 Open 2 & 3, Open 4 & 5 UMC U5 1 & 2, 2 & 3 1 & 2, Open Open 3 & 4 3 & 4 80486SX 2 & 3 2 & 3 Open 3 & 4 1 & 2 SL80486SX 2 & 3 2 & 3 Open 3 & 4 1 & 2 CX486DX 1 & 2, 2 & 3 3 & 4 2 & 3 Open 3 & 4 80486DX 1 & 2, 2 & 3 3 & 4 3 & 4 1 & 2 3 & 4 SL80486DX 1 & 2, 2 & 3 3 & 4 3 & 4 1 & 2 3 & 4 CX486DX2 1 & 2, 2 & 3 3 & 4 2 & 3 Open 3 & 4 CX486DX2 (3.6v) 1 & 2, 2 & 3 3 & 4 2 & 3 Open 3 & 4 CX486DX2 (4v) 1 & 2, 2 & 3 3 & 4 2 & 3 Open 3 & 4 AM486DX2 (3.45v) 1 & 2, 2 & 3 3 & 4 Open Open 3 & 4 (SL)AM486DX2 1 & 2, 2 & 3 3 & 4 1 & 2, 2 & 3 (3.45v) 3 & 4 3 & 4 80486DX2 1 & 2, 2 & 3 3 & 4 3 & 4 1 & 2 3 & 4 SL80486DX2 1 & 2, 2 & 3 3 & 4 3 & 4 1 & 2 3 & 4 AM486DX4 (3.45v) 1 & 2, 2 & 3 3 & 4 Open Open 3 & 4 (SL)AM486DX4 1 & 2, 2 & 3 3 & 4 1 & 2, 2 & 3 (3.45v) 3 & 4 3 & 4 80486DX4 1 & 2, 2 & 3 3 & 4 3 & 4 1 & 2 3 & 4 P24D 1 & 2, 1 & 2 3 & 4 1 & 2, 2 & 3 3 & 4 3 & 4 P24T 1 & 2, 1 & 2 2 & 3 3 & 4 Open 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE SELECTION (CON’T) Type JP14 JP15 JP21 JP22 JP24 JP25 CX486S 1 & 2, 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 3 & 4 UMC U5 Open Open 1 & 2 2 & 3 3 & 4 Open 80486SX 2 & 3 4 & 5 2 & 3 1 & 2 Open Open SL80486SX 2 & 3 4 & 5 2 & 3 1 & 2 Open Open CX486DX 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 80486DX 2 & 3 4 & 5 2 & 3 1 & 2 Open Open SL80486DX 2 & 3 4 & 5 2 & 3 1 & 2 Open Open CX486DX2 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 CX486DX2 (3.6v) 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 CX486DX2 (4v) 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 AM486DX2 (3.45v) Open Open 2 & 3 1 & 2 Open Open (SL)AM486DX2 2 & 3 4 & 5 1 & 2 1 & 2 5 & 6 Open (3.45v) 80486DX2 2 & 3 4 & 5 2 & 3 1 & 2 Open Open SL80486DX2 2 & 3 4 & 5 2 & 3 1 & 2 Open Open AM486DX4 (3.45v) Open Open 2 & 3 1 & 2 Open Open (SL)AM486DX4 2 & 3 4 & 5 1 & 2 1 & 2 Open Open (3.45v) 80486DX4 2 & 3 4 & 5 2 & 3 1 & 2 Open Open P24D 2 & 3 4 & 5 1 & 2 1 & 2 Open 1 & 2 P24T 2 & 3 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 Note: Pins designated should be in the closed position. CPU TYPE SELECTION (CON’T) Type JP30 JP31 JP34 JP35 JP36 JP38 CX486S Open Open 1 & 2 Closed Open Open UMC U5 Open Open 2 & 3 Closed Open Open 80486SX Open Open 1 & 2 Closed Open Open SL80486SX Open Open 1 & 2 Closed Open Open CX486DX Open Open 1 & 2 Closed Open Open 80486DX Open Open 1 & 2 Closed Open Open SL80486DX Open Open 1 & 2 Closed Open Open CX486DX2 Open Open 1 & 2 Closed Open Open CX486DX2 (3.6v) Open Open 1 & 2 Open Open 1 & 2 CX486DX2 (4v) Open Open 1 & 2 Open Open 2 & 3 AM486DX2 2 & 3 Open Open Open 2 & 3 Open (3.45v) (SL)AM486DX2 1 & 2 1 & 2 1 & 2 Open 2 & 3 Open (3.45v) 80486DX2 Open Open 1 & 2 Closed Open Open SL80486DX2 Open Open 1 & 2 Closed Open Open AM486DX4 Open Open Open Open 2 & 3 Open (3.45v) (SL)AM486DX4 1 & 2 1 & 2 1 & 2 Open 2 & 3 Open (3.45v) 80486DX4 Open Open 1 & 2 Open 1 & 2 Open P24D 1 & 2 1 & 2 1 & 2 Closed Open Open P24T Open Open 1 & 2 Closed Open Open Note: Pins designated should be in the closed position. VL BUS WAIT STATE SELECTION Setting JP28 0 Pins 1 & 2 closed » 1 Pins 2 & 3 closed VL BUS SPEED SELECTION Speed JP29 <= 33MHz Pins 1 & 2 closed » >33 MHz Pins 2 & 3 closed FLASH BIOS SELECTION Setting JP37 » EPROM Open 5v flash Pins 2 & 3 closed 12v flash Pins 1 & 2 closed