GIGA-BYTE TECHNOLOGY CO., LTD.
GA-486VF
|
Processor |
80486SX/80487SX/80486DX/80486DX2/80486DX4/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz |
|
Chip Set |
SiS |
|
Max. Onboard DRAM |
128MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
AWARD |
|
Dimensions |
230mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (3), green PC feature |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Power LED & keylock |
J7 |
|
Turbo switch |
J3 |
External power |
JP33 |
|
Turbo LED |
J4 |
LED connector |
JP34 |
|
Speaker |
J5 |
32-bit VESA Local bus slots |
SL1-SL3 |
|
Reset switch |
J6 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Turbo mode enabled |
J3 |
pins 2 & 3 closed | |
|
Turbo mode disabled |
J3 |
pins 1 & 2 closed | |
|
80486DX2, DX or OverDrive installed |
JP8 |
pins 1 & 2 closed | |
|
80486SX installed |
JP8 |
pins 2 & 3 closed | |
|
|
Non AMD CPU |
JP11 |
Closed |
|
AMD CPU |
JP11 |
Open | |
|
|
For Cyrix CPU installed |
JP18 |
Open |
|
For normal operation |
JP18 |
Closed | |
|
|
Normal CPU ADS# operation |
JP20 |
pins 2 & 3 closed |
|
Delay CPU ADS# clock operation |
JP20 |
pins 1 & 2 closed | |
|
Cyrix CPU in use |
*JP21 |
pins 1 & 2 closed | |
|
Other CPU in use |
*JP21 |
pins 2 & 3 closed | |
|
|
DX4CPU x 2 |
JP24 |
pins 3 & 4 closed |
|
|
DX4CPU x 3 |
JP24 |
Open |
|
|
Cyrix CPU |
JP24 |
pins 2 & 3 closed |
|
CMOS memory normal operation |
JP16 |
pins 1 & 2 closed | |
|
CMOS memory clear |
JP16 |
pins 2 & 3 closed | |
|
Green PC mode disabled |
JP26 |
Open | |
|
Green PC mode enabled |
JP26 |
Closed | |
|
|
Monitor type select CGA |
JP17 |
Closed |
|
Monitor type select other |
JP17 |
Open | |
|
Note: *This option applies to Revision 6 only. | |||
|
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) 256K x 9 |
(4) 1M x 9 |
|
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 |
|
65MB |
(4) 256K x 9 |
(4) 16M x 9 |
|
68MB |
(4) 1M x 9 |
(4) 16M x 9 |
|
80MB |
(4) 4M x 9 |
(4) 16M x 9 |
|
128MB |
(4) 16M x 9 |
(4) 16M x 9 |
|
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 |
|
256KB |
(4) 64K x 8 |
NONE |
(1) 16K x 8/(1) 32K x 8 |
|
512KB |
(4) 128K x 8 |
NONE |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP1 |
JP2 |
JP3 |
JP4 |
|
64KB |
Open |
Open |
Open |
N/A |
|
128KB |
Closed |
Open |
Open |
pins 1 & 2 closed |
|
256KB |
Closed |
Closed |
Open |
pins 2 & 3 closed |
|
256KB |
Closed |
Closed |
Open |
pins 1 & 2 closed |
|
512KB |
Closed |
Closed |
Closed |
pins 1 & 2 closed |
|
VL-BUS SPEED CONFIGURATION | |
|
CPU Type |
JP29 |
|
DX-50/40 MHz |
Closed |
|
Other Speed |
Open |
|
CPU VOLTAGE SELECTION | ||
|
CPU Type |
JP36 |
JP37 |
|
5 Voltage CPU |
Closed |
Closed |
|
3.3 Voltage DX4 CPU |
Open |
Open |
|
CPU SPEED SELECTION | |||
|
Speed |
JP5 |
JP6 |
JP7 |
|
25MHz |
Open |
Open |
Closed |
|
33MHz |
Closed |
Closed |
Closed |
|
40MHz |
Open |
Closed |
Closed |
|
50MHz |
Closed |
Open |
Open |
|
50iMHz |
Open |
Open |
Closed |
|
66iMHz |
Closed |
Closed |
Closed |
|
75iMHz |
Open |
Open |
Closed |
|
100iMHz |
Closed |
Closed |
Closed |
|
DELAY LOCAL BUS CLOCK | ||||
|
|
J2 (VESA1) |
J8(VESA2) |
J9(VESA3) | |
|
For normal operation |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed | |
|
DX-33, DX-40, DX-50, DX2-66, DX4-75, DX4-100* |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed | |
|
Note: *For some VL-Bus interface cards that need more address setup time in above listed speeds. | ||||