GIGA-BYTE TECHNOLOGY CO., LTD.
GA-486AS
|
Device Type |
Mainboard |
|
Processor |
CX486DX2/UMCU5SX/80486SX/80486DX/AM486DX2/80486DX2/ AM486DX4/80486DX4/P24D/P24T |
|
Processor Speed |
25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz |
|
Chip Set |
Unidentified |
|
Maximum Onboard Memory |
128MB |
|
Cache |
128/256/512/1024KB |
|
BIOS |
Award |
|
Dimensions |
250mm x 220mm |
|
I/O Options |
32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel port, serial ports (2) |
|
CONNECTIONS |
|||
|
Purpose |
Location |
Purpose |
Location |
|
Serial port 2 |
CN1 |
Power LED & keylock |
J4 |
|
Parallel port |
CN2 |
External battery |
J5 |
|
Serial port 1 |
CN3 |
IDE interface LED |
JP1 |
|
Floppy drive interface |
CN4 |
Turbo LED |
JP2 |
|
IDE interface 1 |
CN5 |
Speaker |
JP3 |
|
IDE interface 2 |
CN6 |
Green PC LED |
JP4 |
|
Green PC connector |
J1 |
Green PC power connector |
JP24 |
|
Reset switch |
J2 |
32-bit PCI slots |
PC1 - PC3 |
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Label |
Position |
|
|
» |
Turbo enabled |
J3 |
Pins 2 & 3 closed |
|
|
Turbo disabled |
J3 |
Pins 1 & 2 closed |
|
» |
CMOS memory normal operation |
JP5 |
Pins 1 & 2 closed |
|
|
CMOS memory clear |
JP5 |
Pins 2 & 3 closed |
|
SIMM CONFIGURATION |
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|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
None |
None |
None |
|
2MB |
(1) 512K x 36 |
None |
None |
None |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
None |
None |
|
3MB |
(1) 512K x 36 |
(1) 256K x 36 |
None |
None |
|
4MB |
(1) 1M x 36 |
None |
None |
None |
|
4MB |
(1) 512K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
None |
|
4MB |
(1) 512K x 36 |
(1) 512K x 36 |
None |
None |
|
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
5MB |
(1) 1M x 36 |
(1) 256K x 36 |
None |
None |
|
8MB |
(1) 2M x 36 |
None |
None |
None |
|
8MB |
(1) 1M x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
None |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
None |
None |
|
8MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
|
9MB |
(1) 2M x 36 |
(1) 256K x 36 |
None |
None |
|
9MB |
(1) 256K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
|
10MB |
(1) 512K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
|
10MB |
(1) 512K x 36 |
(1) 2M x 36 |
None |
None |
|
11MB |
(1) 2M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
12MB |
(1) 2M x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
None |
|
12MB |
(1) 2M x 36 |
(1) 1M x 36 |
None |
None |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
|
14MB |
(1) 2M x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
|
14MB |
(1) 512K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 4M x 36 |
None |
None |
None |
|
DIMM/SIMM CONFIGURATION (CON'T) |
||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
16MB |
(1) 2M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
|
16MB |
(1) 2M x 36 |
(1) 2M x 36 |
None |
None |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
18MB |
(1) 512K x 36 |
(1) 4M x 36 |
None |
None |
|
19MB |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
20MB |
(1) 4M x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
None |
|
20MB |
(1) 4M x 36 |
(1) 1M x 36 |
None |
None |
|
24MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
|
24MB |
(1) 4M x 36 |
(1) 2M x 36 |
None |
None |
|
24MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
None |
|
24MB |
(1) 2M x 36 |
(1) 4M x 36 |
None |
None |
|
25MB |
(1) 256K x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
26MB |
(1) 512K x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
28MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
28MB |
(1) 1M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
32MB |
(1) 8M x 36 |
None |
None |
None |
|
32MB |
(1) 4M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
None |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
None |
None |
|
32MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
33MB |
(1) 8M x 36 |
(1) 256K x 36 |
None |
None |
|
33MB |
(1) 256K x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
34MB |
(1) 512K x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
36MB |
(1) 1M x 36 |
(1) 8M x 36 |
None |
None |
|
38MB |
(1) 8M x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
|
40MB |
(1) 2M x 36 |
(1) 8M x 36 |
None |
None |
|
48MB |
(1) 4M x 36 |
(1) 8M x 36 |
None |
None |
|
56MB |
(1) 2M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 8M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
64MB |
(1) 8M x 36 |
(1) 8M x 36 |
None |
None |
|
68MB |
(1) 1M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
None |
|
72MB |
(1) 2M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
None |
|
80MB |
(1) 8M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
98MB |
(1) 512K x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
112MB |
(1) 4M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
128MB |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
CACHE CONFIGURATION |
|||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
128KB |
(4) 32K x 8 |
None |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 16K x 8 |
|
512KB |
(4) 64K x 8 |
(4) 64K x 8 |
(1) 32K x 8 |
|
1MB |
(4) 128K x 8 |
(4) 128K x 8 |
(1) 64K x 8 |
|
Note: The location of the banks are unidentified. |
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|
CACHE JUMPER CONFIGURATION |
||||
|
Size |
JP7 |
JP8 |
JP9 |
JP10 |
|
128KB |
Open |
Open |
Open |
Pins 1 & 2 closed |
|
256KB |
Closed |
Open |
Open |
Pins 2 & 3 closed |
|
512KB |
Closed |
Closed |
Open |
Pins 2 & 3 closed |
|
1MB |
Closed |
Closed |
Closed |
Pins 2 & 3 closed |
|
CPU SPEED SELECTION |
|
|
Speed |
JP14 |
|
25MHz |
Open |
|
33MHz |
Closed |
|
50iMHz |
Open |
|
66iMHz |
Closed |
|
75iMHz |
Open |
|
100iMHz |
Closed |
|
CPU TYPE SELECTION |
|||||
|
Type |
JP20 |
JP23 |
JP27 |
JP28 |
JP30 |
|
CX 486DX2 |
Open |
Closed |
2 & 3 |
1 & 2 |
Closed |
|
UMC U5SX |
Open |
Closed |
2 & 3 |
2 & 3 |
Open |
|
SL AM486DX2 (WB) |
Closed |
Closed |
1 & 2 |
1 & 2 |
Open |
|
SL AM486DX2 (WT) |
Closed |
Closed |
2 & 3 |
1 & 2 |
Open |
|
AM 486DX2 (NE) |
Closed |
Closed |
1 & 2 |
1 & 2 |
Open |
|
SL AM486DX4 (WB) |
Open |
Closed |
1 & 2 |
1 & 2 |
Open |
|
SL AM486DX4( WT) |
Open |
Closed |
2 & 3 |
1 & 2 |
Open |
|
AM 486DX4 (NE) |
Closed |
Closed |
2 & 3 |
1 & 2 |
Open |
|
80486SX |
Open |
Closed |
2 & 3 |
2 & 3 |
Open |
|
80486DX |
Open |
Closed |
2 & 3 |
1 & 2 |
Open |
|
80486DX2 |
Open |
Closed |
2 & 3 |
1 & 2 |
Open |
|
80486DX4 |
Open |
Closed |
2 & 3 |
1 & 2 |
Open |
|
P24D (WB) |
Open |
Open |
1 & 2 |
1 & 2 |
Open |
|
P24D (WT) |
Open |
Closed |
2 & 3 |
1 & 2 |
Open |
|
P24T (WB) |
Open |
Open |
2 & 3 |
1 & 2 |
Open |
|
P24T (WT) |
Open |
Closed |
2 & 3 |
1 & 2 |
Open |
|
Note: Pins designated should be in the closed position. |
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|
CPU TYPE SELECTION (CON'T) |
||||
|
Type |
JP31 |
RN1 |
RN2 |
RN3 |
|
CX 486DX2 |
Open |
Installed |
Not installed |
Not installed |
|
UMC U5SX |
Open |
Not installed |
Installed |
Installed |
|
SL AM486DX2 (WB) |
Open |
Not installed |
Installed |
Installed |
|
SL AM486DX2 (WT) |
Open |
Not installed |
Installed |
Installed |
|
AM 486DX2 (NE) |
Open |
Not installed |
Installed |
Installed |
|
SL AM486DX4 (WB) |
Open |
Not installed |
Installed |
Installed |
|
SL AM486DX4( WT) |
Open |
Not installed |
Installed |
Installed |
|
AM 486DX4 (NE) |
Open |
Not installed |
Installed |
Installed |
|
80486SX |
Closed |
Not installed |
Installed |
Installed |
|
80486DX |
Closed |
Not installed |
Installed |
Installed |
|
80486DX2 |
Closed |
Not installed |
Installed |
Installed |
|
80486DX4 |
Closed |
Not installed |
Installed |
Installed |
|
P24D (WB) |
Closed |
Not installed |
Installed |
Installed |
|
P24D (WT) |
Closed |
Not installed |
Installed |
Installed |
|
P24T (WB) |
Closed |
Not installed |
Installed |
Installed |
|
P24T (WT) |
Closed |
Not installed |
Installed |
Installed |
|
CPU VOLTAGE SELECTION |
|
|
Voltage |
JP29 |
|
3.3v |
Open |
|
5v |
Closed |