GIGA-BYTE TECHNOLOGY CO., LTD.
GA-486VM
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/50(internal)/50/66(internal)MHz |
Chip Set | UMC |
Max. Onboard DRAM | 32MB |
SRAM Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 254mm x 218mm |
I/O Options | VESA local bus slots (3) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J2 | Speaker | J8 |
Turbo LED | J5 | Power LED & keylock | J9 |
Reset switch | J6 | 32-bit VESA card (3) | S1 - S3 |
Turbo switch | J7 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS memory normal operation | J3 | pins 1 & 2 closed |
CMOS memory clear | J3 | pins 2 & 3 closed | |
» | Monitor type select color | J11 | closed |
Monitor type select monochrome | J11 | open | |
» | VESA bus wait states select 0 | JP5 | open |
VESA bus wait state select 1 | JP5 | open |
CPU JUMPER CONFIGURATION | |||||
CPU Type | OSC | JP2 | JP6 | W5 | W6 |
80486SX-20 | 20MHz | pins 1 & 2 closed | open | open | pins 2 & 3 closed |
80486SX-20 | 40MHz | pins 1 & 2 closed | open | closed | pins 2 & 3 closed |
80486SX-25 | 25MHz | pins 1 & 2 closed | open | open | pins 2 & 3 closed |
80487SX-25 | 25MHz | pins 1 & 2 closed | open | open | pins 1 & 2 closed |
80486DX-25 | 25MHz | pins 1 & 2 closed | open | open | pins 1 & 2 closed |
80486DX-33 | 33.3MHz | pins 1 & 2 closed | open | open | pins 1 & 2 closed |
80486DX-40 | 40MHz | pins 1 & 2 closed | open | open | pins 1 & 2 closed |
80486DX-50 | 50MHz | pins 2 & 3 closed | closed | open | pins 1 & 2 closed |
80486DX2-50 | 25MHz | pins 1 & 2 closed | open | open | pins 1 & 2 closed |
80486DX2-66 | 33.3MHz | pins 1 & 2 closed | open | open | 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 |
5MB | (4) 1M x 9 | (4) 256K x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
SRAM JUMPER CONFIGURATION | ||||
Size | W1 | W2 | W3 | W4 |
64KB | open | open | pins 1 & 2 closed | pins 1 & 2 closed |
128KB | closed | open | pins 2 & 3 closed | pins 2 & 3 closed |
256KB | closed | closed | pins 1 & 2 closed | pins 2 & 3 closed |
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 |