GIGA-BYTE TECHNOLOGY CO., LTD.
GA-486TA
|
Processor |
80486SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/40(internal)/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
128MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS |
|||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J1 |
Turbo switch |
J4 |
|
Reset switch |
J2 |
Turbo LED |
J5 |
|
Speaker |
J3 |
32-bit VESA Local bus slots |
SL1 & SL2 |
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Jumper |
Position |
|
|
» |
CPU type select 80486DX/P24T |
J6 |
pins 1 & 2 closed |
|
|
CPU type select 80486SX |
J6 |
pins 2 & 3 closed |
|
» |
Monitor type select color |
J14 |
Closed |
|
|
Monitor type select monochrome |
J14 |
Open |
|
» |
CMOS memory normal operation |
J17 |
Open |
|
|
CMOS memory clear |
J17 |
Closed |
|
» |
Factory configured - do not alter |
J18 |
pins 2 & 3 closed |
|
» |
Factory configured - do not alter |
J23 |
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 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
64MB |
(4) 16M x 9 |
NONE |
|
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) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
512KB |
(1) 128K x 8 |
NONE |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
||||
|
Size |
J8 |
J9 |
J10 |
J11 |
|
64KB |
Open |
Open |
Open |
N/A |
|
128KB |
Open |
Closed |
Open |
pins 1 & 2 closed |
|
256KB |
Open |
Closed |
Closed |
pins 2 & 3 closed |
|
512KB |
Closed |
Closed |
Closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION |
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|
Speed |
JC0 |
JC1 |
JC2 |
|
25MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
33MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
40MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
50iMHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
50MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
66iMHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
VESA WAIT STATE/BUS SPEEDCONFIGURATION |
|||
|
CPU speed |
Wait states |
J31 |
J32 |
|
£ 33MHz |
0 wait states |
Open |
Open |
|
> 33MHz |
1 wait state |
Closed |
Closed |