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 |