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 |