GIGA-BYTE TECHNOLOGY CO., LTD
GA-386UM 33/40 MAIN BOARD
| 
 Processor  | 
 80386DX  | 
| 
 Processor Speed  | 
 33/40MHz  | 
| 
 Chip Set  | 
 OPTI  | 
| 
 Max. Onboard DRAM  | 
 32MB  | 
| 
 SRAM Cache  | 
 64/128/256KB  | 
| 
 BIOS  | 
 AMI  | 
| 
 Dimensions  | 
 220mm x 260mm  | 
| 
 I/O Options  | 
 None  | 
| 
 NPU Options  | 
 80387/3167  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Power LED & keylock  | 
 J1  | 
 Turbo switch  | 
 J4  | 
| 
 Speaker  | 
 J2  | 
 Turbo LED  | 
 J5  | 
| 
 Reset switch  | 
 J3  | 
 External battery  | 
 J11  | 
| 
 Note:Board may be supplied with either a PGA (socketed) or PQFP (surface mounted) CPU.  | |||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper  | 
 Position  | |
| » | 
 NPU absent  | 
 J7  | 
 open  | 
| 
 NPU present  | 
 J7  | 
 closed  | |
| » | 
 Monitor type select color  | 
 J8  | 
 closed  | 
| 
 Monitor type select monochrome  | 
 J8  | 
 open  | |
| » | 
 CMOS memory normal operation  | 
 J9  | 
 pins 2 & 3 closed  | 
| 
 CMOS memory clear  | 
 J9  | 
 pins 1 & 2 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  | 
| 
 8MB  | 
 (4) 1M x 9  | 
 (4) 1M x 9  | 
| 
 16MB  | 
 (4) 4M x 9  | 
 NONE  | 
| 
 32MB  | 
 (4) 4M x 9  | 
 (4) 4M x 9  | 
| 
 SRAM CONFIGURATION  | |||
| 
 Size  | 
 Cache SRAM  | 
 Location  | 
 TAG  | 
| 
 64KB  | 
 (8) 8K x 8  | 
 Banks 0 & 1  | 
 (1) 8K x 8  | 
| 
 128KB  | 
 (4) 32K x 8  | 
 Bank 0  | 
 (1) 8K x 8  | 
| 
 256KB  | 
 (8) 32K x 8  | 
 Banks 0 & 1  | 
 (1) 32K x 8  | 
| 
 SRAM JUMPER CONFIGURATION  | |||||
| 
 Size  | 
 WC1  | 
 WC2  | 
 WC3  | 
 WC4  | 
 WC5  | 
| 
 64KB  | 
 pins 2 & 3 closed  | 
 open  | 
 open  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 128KB  | 
 pins 1 & 2 closed  | 
 open  | 
 closed  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
| 
 256KB  | 
 pins 2 & 3 closed  | 
 closed  | 
 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  |