GIGA-BYTE TECHNOLOGY CO., LTD.
GA-486VC
|
Processor |
80486SX/80487SX/CX486S/CX486S2/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
AMI |
|
Dimensions |
230mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (3) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Turbo LED |
JP6 |
|
Turbo switch |
J2 |
External power control port |
JP15 |
|
Speaker |
J3 |
32-bit VESA Local bus slot |
S1 |
|
Power LED & keylock |
J4 |
32-bit VESA Local bus slot |
S2 |
|
Reset switch |
J5 |
32-bit VESA Local bus slot |
S3 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CMOS memory normal operation |
JP13 |
pins 1 & 2 closed |
|
CMOS memory clear |
JP13 |
pins 2 & 3 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 |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
17MB |
(4) 256K x 9 |
(4) 4M x 9 |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
64MB |
(4) 16M x 9 |
NONE |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 16K x 8/(1) 32K x 8 |
|
512KB |
(4) 128K x 8 |
NONE |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP2 |
JP3 |
JP4 |
JP5 |
|
64KB |
pins 1 & 2 closed |
Open |
Open |
Open |
|
128KB |
pins 2 & 3 closed |
Open |
Open |
Closed |
|
256KB |
pins 1 & 2 closed |
Open |
Closed |
Closed |
|
512KB |
pins 2 & 3 closed |
Closed |
Closed |
Closed |
|
CPU TYPE CONFIGURATION | ||
|
Type |
JP18 |
JP19 |
|
80486SX |
pins 2 & 3 closed |
Open |
|
80487SX |
pins 1 & 2 closed |
Open |
|
CX486S |
N/A |
Open |
|
CX486S2 |
N/A |
Closed |
|
80486DX |
pins 1 & 2 closed |
Open |
|
80486DX2 |
pins 1 & 2 closed |
Open |
|
Pentium Overdrive |
pins 1 & 2 closed |
Open |
|
CPU SPEED CONFIGURATION | |||||
|
Speed |
JP10 |
JP11 |
JP12 |
JP14 |
JP17 |
|
20MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
Open |
|
25MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
Open |
|
33MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
Open |
|
40MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
Closed |
|
50i MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
Open |
|
50MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
Closed |
|
66i MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
Open |