GIGA-BYTE TECHNOLOGY CO., LTD.
GA-486US
|
Processor |
80486SX/80486DX |
|
Processor Speed |
16/20/25/33/50MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit local bus card slots (2) |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & Keylock |
J1 |
External battery |
J17 |
|
Reset switch |
J2 |
32-bit local bus slots |
LB1 & LB2 |
|
Speaker |
J3 |
LB2 | |
|
Turbo LED |
J5 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
External cache enabled |
J4 |
pins 1 & 2 closed | |
|
External cache disabled |
J4 |
pins 2 & 3 closed | |
|
CPU type select 80486DX |
J8 |
pins 1 & 2 closed | |
|
CPU type select 80486SX |
J8 |
pins 2 & 3 closed | |
|
CPU speed select iOSC/1 |
J13 |
Open | |
|
CPU speed select iOSC/2 |
J13 |
Closed | |
|
Monitor type select color |
J16 |
Closed | |
|
Monitor type select monochrome |
J16 |
Open | |
|
CMOS memory normal operation |
J18 |
Closed | |
|
CMOS memory clear |
J18 |
Open | |
|
Note:If J13 is closed, you must set the Bus speed select to CLKIN/5 in the advanced chipset setup. | |||
|
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 |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(3) 16K x 4 |
|
128KB |
(4) 32K x 8 |
NONE |
(3) 16K x 4 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(3) 16K x 4 |
|
CACHE CONFIGURATION | |||
|
Size |
J10 |
J11 |
J12 |
|
64KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
128KB |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
256KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |