SILICON STAR INTERNATIONAL, INC.
486 VESA AG4
| 
 Processor  | 
 CX486SX/80486SX/80487SX/CX486DX/80486DX/80486DX2/Pentium Overdrive  | 
| 
 Processor Speed  | 
 20/25/33/40(internal)/50(internal)/50/66(internal)/75(internal)/83(internal)/ 100(internal)MHz  | 
| 
 Chip Set  | 
 SIS  | 
| 
 Max. Onboard DRAM  | 
 128MB  | 
| 
 Cache  | 
 128/256/512KB  | 
| 
 BIOS  | 
 AMI/Award  | 
| 
 Dimensions  | 
 260mm x 220mm  | 
| 
 I/O Options  | 
 32-bit VESA local bus slots (3), green PC connector  | 
| 
 NPU Options  | 
 None  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 External battery  | 
 J1  | 
 Reset switch  | 
 J6  | 
| 
 Turbo switch  | 
 J3  | 
 Power LED & keylock  | 
 J7  | 
| 
 Turbo LED  | 
 J4  | 
 Green PC connector  | 
 JP45  | 
| 
 Speaker  | 
 J5  | 
 32-bit VESA Local bus slots  | 
 SL1 - SL3  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper  | 
 Position  | |
| 
 »  | 
 Factory configured - do not alter  | 
 J2  | 
 Open  | 
| 
 »  | 
 Turbo mode enabled  | 
 J3  | 
 pins 2 & 3 closed  | 
| 
 Turbo mode 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 color  | 
 JP17  | 
 Closed  | 
| 
 Monitor type select monochrome  | 
 JP17  | 
 Open  | |
| 
 »  | 
 Enter break switch  | 
 JP19  | 
 pins 1 & 2 closed  | 
| 
 Leave break switch  | 
 JP19  | 
 pins 2 & 3 closed  | |
| 
 »  | 
 Factory configured - do not alter  | 
 JP23  | 
 pins 1 & 2 closed  | 
| 
 »  | 
 Suspend mode disabled  | 
 JP26  | 
 Open  | 
| 
 Suspend mode enabled  | 
 JP26  | 
 Closed  | |
| 
 »  | 
 Factory configured - do not alter  | 
 JP30  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter  | 
 JP31  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter  | 
 JP42  | 
 Closed  | 
| 
 Note: The location of JP23 & JP26 is unidentified.  | |||
| 
 DRAM CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
| 
 1MB  | 
 NONE  | 
 NONE  | 
 (1) 256K x 36  | 
| 
 1MB  | 
 (4) 256K x 9  | 
 NONE  | 
 NONE  | 
| 
 2MB  | 
 NONE  | 
 (1) 256K x 36  | 
 (1) 256K x 36  | 
| 
 2MB  | 
 NONE  | 
 NONE  | 
 (1) 512K x 36  | 
| 
 2MB  | 
 (4) 256K x 9  | 
 NONE  | 
 (1) 256K x 36  | 
| 
 4MB  | 
 NONE  | 
 NONE  | 
 (1) 1M x 36  | 
| 
 4MB  | 
 NONE  | 
 (1) 512K x 36  | 
 (1) 512K x 36  | 
| 
 4MB  | 
 (4) 1M x 9  | 
 NONE  | 
 NONE  | 
| 
 5MB  | 
 NONE  | 
 (1) 1M x 36  | 
 (1) 256K x 36  | 
| 
 5MB  | 
 (4) 256K x 9  | 
 NONE  | 
 (1) 1M x 36  | 
| 
 6MB  | 
 (4) 1M x 9  | 
 (1) 256K x 36  | 
 (1) 256K x 36  | 
| 
 6MB  | 
 NONE  | 
 (1) 1M x 36  | 
 (1) 512K x 36  | 
| 
 6MB  | 
 (4) 256K x 9  | 
 (1) 1M x 36  | 
 (1) 256K x 36  | 
| 
 8MB  | 
 (4) 1M x 9  | 
 (1) 512K x 36  | 
 (1) 512K x 36  | 
| 
 8MB  | 
 NONE  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
| 
 8MB  | 
 NONE  | 
 NONE  | 
 (1) 2M x 36  | 
| 
 8MB  | 
 (4) 1M x 9  | 
 NONE  | 
 (1) 1M x 36  | 
| 
 10MB  | 
 (4) 256K x 9  | 
 (1) 2M x 36  | 
 (1) 256K x 36  | 
| 
 12MB  | 
 (4) 1M x 9  | 
 NONE  | 
 (1) 2M x 36  | 
| 
 12MB  | 
 (4) 1M x 9  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
| 
 16MB  | 
 NONE  | 
 (1) 2M x 36  | 
 (1) 2M x 36  | 
| 
 16MB  | 
 NONE  | 
 NONE  | 
 (1) 4M x 36  | 
| 
 16MB  | 
 (4) 1M x 9  | 
 (1) 2M x 36  | 
 (1) 1M x 36  | 
| 
 16MB  | 
 (4) 1M x 9  | 
 (1) 1M x 36  | 
 (1) 2M x 36  | 
| 
 17MB  | 
 NONE  | 
 (1) 4M x 36  | 
 (1) 256K x 36  | 
| 
 17MB  | 
 (4) 256K x 9  | 
 NONE  | 
 (1) 4M x 36  | 
| 
 DRAM CONFIGURATION (CON’T)  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
| 
 18MB  | 
 (4) 4M x 9  | 
 (1) 256K x 36  | 
 (1) 256K x 36  | 
| 
 18MB  | 
 NONE  | 
 (1) 4M x 36  | 
 (1) 512K x 36  | 
| 
 18MB  | 
 (4) 256K x 9  | 
 (1) 4M x 36  | 
 (1) 256K x 36  | 
| 
 20MB  | 
 (4) 4M x 9  | 
 (1) 512K x 36  | 
 (1) 512K x 36  | 
| 
 20MB  | 
 NONE  | 
 (1) 4M x 36  | 
 (1) 1M x 36  | 
| 
 24MB  | 
 (4) 4M x 9  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
| 
 24MB  | 
 (4) 1M x 9  | 
 (1) 4M x 36  | 
 (1) 1M x 36  | 
| 
 32MB  | 
 NONE  | 
 (1) 4M x 36  | 
 (1) 4M x 36  | 
| 
 32MB  | 
 NONE  | 
 NONE  | 
 (1) 8M x 36  | 
| 
 32MB  | 
 (4) 4M x 9  | 
 NONE  | 
 (1) 4M x 36  | 
| 
 36MB  | 
 (4) 4M x 9  | 
 (1) 4M x 36  | 
 (1) 1M x 36  | 
| 
 36MB  | 
 NONE  | 
 (1) 8M x 36  | 
 (1) 1M x 36  | 
| 
 36MB  | 
 (4) 1M x 9  | 
 NONE  | 
 (1) 8M x 36  | 
| 
 36MB  | 
 (4) 1M x 9  | 
 (1) 4M x 36  | 
 (1) 4M x 36  | 
| 
 40MB  | 
 (4) 1M x 9  | 
 (1) 8M x 36  | 
 (1) 1M x 36  | 
| 
 48MB  | 
 NONE  | 
 (1) 8M x 36  | 
 (1) 4M x 36  | 
| 
 48MB  | 
 (4) 4M x 9  | 
 NONE  | 
 (1) 8M x 36  | 
| 
 48MB  | 
 (4) 4M x 9  | 
 (1) 4M x 36  | 
 (1) 4M x 36  | 
| 
 64MB  | 
 NONE  | 
 (1) 8M x 36  | 
 (1) 8M x 36  | 
| 
 64MB  | 
 NONE  | 
 NONE  | 
 (1) 16M x 36  | 
| 
 64MB  | 
 (4) 4M x 9  | 
 (1) 4M x 36  | 
 (1) 8M x 36  | 
| 
 64MB  | 
 (4) 16M x 9  | 
 NONE  | 
 NONE  | 
| 
 64MB  | 
 (4) 4M x 9  | 
 (1) 8M x 36  | 
 (1) 4M x 36  | 
| 
 64MB  | 
 (4) 16M x 9  | 
 NONE  | 
 NONE  | 
| 
 65MB  | 
 NONE  | 
 (1) 16M x 36  | 
 (1) 256K x 36  | 
| 
 65MB  | 
 (4) 256K x 9  | 
 NONE  | 
 (1) 16M x 36  | 
| 
 68MB  | 
 NONE  | 
 (1) 16M x 36  | 
 (1) 1M x 36  | 
| 
 72MB  | 
 (4) 16M x 9  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
| 
 72MB  | 
 (4) 1M x 9  | 
 (1) 16M x 36  | 
 (1) 1M x 36  | 
| 
 80MB  | 
 NONE  | 
 (1) 16M x 36  | 
 (1) 4M x 36  | 
| 
 80MB  | 
 (4) 4M x 9  | 
 NONE  | 
 (1) 16M x 36  | 
| 
 96MB  | 
 (4) 16M x 9  | 
 (1) 4M x 36  | 
 (1) 4M x 36  | 
| 
 128MB  | 
 NONE  | 
 (1) 16M x 36  | 
 (1) 16M x 36  | 
| 
 128MB  | 
 (4) 16M x 9  | 
 NONE  | 
 (1) 16M x 36  | 
| 
 DRAM JUMPER CONFIGURATION  | |||||
| 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 JP33  | 
 JP34  | 
 JP35  | 
| 
 SIMM 1-4  | 
 SIMM 6 (S)  | 
 SIMM 5 (S)  | 
 Open  | 
 1 & 2  | 
 Open  | 
| 
 SIMM 1-4  | 
 SIMM 6 (D)  | 
 SIMM 5 (S)  | 
 Open  | 
 1 & 2  | 
 Closed  | 
| 
 SIMM 1-4  | 
 SIMM 6 (S)  | 
 SIMM 5 (D)  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 SIMM 6 (S)  | 
 SIMM 5 (S)  | 
 SIMM 1-4  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 SIMM 6 (D)  | 
 SIMM 5 (D)  | 
 SIMM 1-4  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 SIMM 6 (D)  | 
 SIMM 5 (S)  | 
 NONE  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 SIMM 6 (D)  | 
 SIMM 5 (D)  | 
 SIMM 1-4  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 Note:Pins designated should be in the closed positon.  | |||||
| 
 DRAM JUMPER CONFIGURATION (CON’T)  | |||||
| 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 JP36  | 
 JP37  | 
 JP38  | 
| 
 SIMM 1-4  | 
 SIMM 6 (S)  | 
 SIMM 5 (S)  | 
 2 & 3  | 
 Open  | 
 2 & 3  | 
| 
 SIMM 1-4  | 
 SIMM 6 (D)  | 
 SIMM 5 (S)  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 SIMM 1-4  | 
 SIMM 6 (S)  | 
 SIMM 5 (D)  | 
 2 & 3  | 
 Open  | 
 2 & 3  | 
| 
 SIMM 6 (S)  | 
 SIMM 5 (S)  | 
 SIMM 1-4  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 SIMM 6 (D)  | 
 SIMM 5 (D)  | 
 SIMM 1-4  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 SIMM 6 (D)  | 
 SIMM 5 (S)  | 
 NONE  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 SIMM 6 (D)  | 
 SIMM 5 (D)  | 
 SIMM 1-4  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 Note:Pins designated should be in the closed positon.  | |||||
| 
 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) 64K x 8  | 
 (4) 64K x 8  | 
 (1) 32K x 8  | 
| 
 512KB  | 
 (4) 128K x 8  | 
 NONE  | 
 (1) 32K x 8  | 
| 
 CACHE JUMPER CONFIGURATION  | |||||
| 
 Size  | 
 JP1  | 
 JP2  | 
 JP4  | 
 JP40  | 
 JP41  | 
| 
 128KB  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 256KB  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
| 
 256KB  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 512KB  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
| 
 512KB  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
| 
 Note: Pins designated should be in the closed position.  | |||||
| 
 CPU TYPE CONFIGURATION  | ||||||||
| 
 Type  | 
 JP8  | 
 JP9  | 
 JP10  | 
 JP11  | 
 JP12  | 
 JP13  | 
 JP14  | 
 JP15  | 
| 
 CX486SX  | 
 2 & 3  | 
 Open  | 
 2 & 3  | 
 Open  | 
 2-3, 4-5  | 
 Open  | 
 1-2, 3-4  | 
 2 & 3  | 
| 
 486SX  | 
 2 & 3  | 
 Open  | 
 2 & 3  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 486SL  | 
 1 & 2  | 
 Closed  | 
 2 & 3  | 
 2 & 3  | 
 3 & 4  | 
 Open  | 
 2 & 3  | 
 4 & 5  | 
| 
 CX486DX  | 
 1 & 2  | 
 Closed  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
 1-2, 3-4  | 
 2 & 3  | 
| 
 486DX/DX2  | 
 1 & 2  | 
 Closed  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 486DX4  | 
 1 & 2  | 
 Closed  | 
 2 & 3  | 
 2 & 3  | 
 3 & 4  | 
 Open  | 
 2 & 3  | 
 4 & 5  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||||
| 
 CPU TYPE CONFIGURATION (CON’T)  | |||||||
| 
 Type  | 
 JP21  | 
 JP22  | 
 JP24  | 
 JP25  | 
 JP46  | 
 JP48  | 
 JP50  | 
| 
 CX486SX  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
| 
 486SX  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
| 
 486SL  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
 Open  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
| 
 CX486DX  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
| 
 486DX/DX2  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
| 
 486DX4  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
 Open  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
| 
 Note: Pins designated should be in the closed position.  | |||||||
| 
 CPU SPEED CONFIGURATION  | ||||||||
| 
 Speed  | 
 JP5  | 
 JP6  | 
 JP7  | 
 JP20  | 
 JP32  | 
 JP47  | 
 JP49  | 
 JP51  | 
| 
 20MHz  | 
 Closed  | 
 Open  | 
 Closed  | 
 1 & 2  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 25MHz  | 
 Closed  | 
 Closed  | 
 Open  | 
 1 & 2  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 33MHz  | 
 Open  | 
 Closed  | 
 Closed  | 
 1 & 2  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 40MHz  | 
 Closed  | 
 Open  | 
 Open  | 
 2 & 3  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 50iMHz  | 
 Closed  | 
 Closed  | 
 Open  | 
 1 & 2  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 50MHz  | 
 Open  | 
 Open  | 
 Closed  | 
 1 & 2  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 66iMHz  | 
 Open  | 
 Closed  | 
 Closed  | 
 1 & 2  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||||
| 
 CPU SPEED CONFIGURATION (DX4 ONLY)  | ||||||||
| 
 Speed  | 
 JP5  | 
 JP6  | 
 JP7  | 
 JP20  | 
 JP32  | 
 JP47  | 
 JP49  | 
 JP51  | 
| 
 25/75MHz  | 
 Closed  | 
 Closed  | 
 Open  | 
 1 & 2  | 
 Open  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 33/83MHz  | 
 Open  | 
 Closed  | 
 Closed  | 
 1 & 2  | 
 Open  | 
 2 & 3  | 
 Open  | 
 Closed  | 
| 
 33/100MHz  | 
 Open  | 
 Closed  | 
 Closed  | 
 1 & 2  | 
 Open  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 50/100MHz  | 
 Open  | 
 Open  | 
 Closed  | 
 1 & 2  | 
 Open  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||||
| 
 VESA WAIT STATE CONFIGURATION  | |
| 
 Wait states  | 
 JP28  | 
| 
 0 wait states  | 
 pins 1 & 2 closed  | 
| 
 1 wait state  | 
 pins 2 & 3 closed  | 
| 
 VESA BUS SPEED CONFIGURATION  | |
| 
 CPU speed  | 
 JP29  | 
| 
 < = 33MHz  | 
 pins 1 & 2 closed  | 
| 
 > 33MHz  | 
 pins 2 & 3 closed  | 
| 
 GREEN PC CONFIGURATION  | |
| 
 Description  | 
 JP45  | 
| 
 Control video HSYNC  | 
 pin 1  | 
| 
 Ground  | 
 pin 2  | 
| 
 Control video VSYNC  | 
 pin 3  | 
| 
 Ground  | 
 pin 4  | 
| 
 Control ENVIDEO  | 
 pin 5  | 
| 
 Ground  | 
 pin 6  | 
| 
 Monitor AC power  | 
 pin 7  | 
| 
 Ground  | 
 pin 8  |