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 |