ABIT COMPUTER CORPORATION
486 VESA AG4
|
Processor |
CX486SX/80486SX/80487SX/CX486DX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
20/25/33/40(internal)/50(internal)/50/66(internal)/75(internal)/83(internal)/ 100(internal)MHz |
|
Chip Set |
SIS |
|
Max. Onboard DRAM |
128MB |
|
Cache |
128/256/512KB |
|
BIOS |
AMI/Award |
|
Dimensions |
260mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (3), green PC connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Reset switch |
J6 |
|
Turbo switch |
J3 |
Power LED & keylock |
J7 |
|
Turbo LED |
J4 |
Green PC connector |
JP45 |
|
Speaker |
J5 |
32-bit VESA Local bus slots |
SL1 - SL3 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Factory configured - do not alter |
J2 |
Open |
|
|
Turbo mode enabled |
J3 |
pins 2 & 3 closed |
|
Turbo mode disabled |
J3 |
pins 1 & 2 closed | |
|
|
CMOS memory normal operation |
JP16 |
pins 1 & 2 closed |
|
CMOS memory clear |
JP16 |
pins 2 & 3 closed | |
|
|
Monitor type select color |
JP17 |
Closed |
|
Monitor type select monochrome |
JP17 |
Open | |
|
|
Enter break switch |
JP19 |
pins 1 & 2 closed |
|
Leave break switch |
JP19 |
pins 2 & 3 closed | |
|
|
Factory configured - do not alter |
JP23 |
pins 1 & 2 closed |
|
|
Suspend mode disabled |
JP26 |
Open |
|
Suspend mode enabled |
JP26 |
Closed | |
|
|
Factory configured - do not alter |
JP30 |
Open |
|
|
Factory configured - do not alter |
JP31 |
Open |
|
|
Factory configured - do not alter |
JP42 |
Closed |
|
Note: The location of JP23 & JP26 is unidentified. | |||
|
DRAM CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
1MB |
NONE |
NONE |
(1) 256K x 36 |
|
1MB |
(4) 256K x 9 |
NONE |
NONE |
|
2MB |
NONE |
(1) 256K x 36 |
(1) 256K x 36 |
|
2MB |
NONE |
NONE |
(1) 512K x 36 |
|
2MB |
(4) 256K x 9 |
NONE |
(1) 256K x 36 |
|
4MB |
NONE |
NONE |
(1) 1M x 36 |
|
4MB |
NONE |
(1) 512K x 36 |
(1) 512K x 36 |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
|
5MB |
NONE |
(1) 1M x 36 |
(1) 256K x 36 |
|
5MB |
(4) 256K x 9 |
NONE |
(1) 1M x 36 |
|
6MB |
(4) 1M x 9 |
(1) 256K x 36 |
(1) 256K x 36 |
|
6MB |
NONE |
(1) 1M x 36 |
(1) 512K x 36 |
|
6MB |
(4) 256K x 9 |
(1) 1M x 36 |
(1) 256K x 36 |
|
8MB |
(4) 1M x 9 |
(1) 512K x 36 |
(1) 512K x 36 |
|
8MB |
NONE |
(1) 1M x 36 |
(1) 1M x 36 |
|
8MB |
NONE |
NONE |
(1) 2M x 36 |
|
8MB |
(4) 1M x 9 |
NONE |
(1) 1M x 36 |
|
10MB |
(4) 256K x 9 |
(1) 2M x 36 |
(1) 256K x 36 |
|
12MB |
(4) 1M x 9 |
NONE |
(1) 2M x 36 |
|
12MB |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
NONE |
(1) 2M x 36 |
(1) 2M x 36 |
|
16MB |
NONE |
NONE |
(1) 4M x 36 |
|
16MB |
(4) 1M x 9 |
(1) 2M x 36 |
(1) 1M x 36 |
|
16MB |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 2M x 36 |
|
17MB |
NONE |
(1) 4M x 36 |
(1) 256K x 36 |
|
17MB |
(4) 256K x 9 |
NONE |
(1) 4M x 36 |
|
DRAM CONFIGURATION (CONT) | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
18MB |
(4) 4M x 9 |
(1) 256K x 36 |
(1) 256K x 36 |
|
18MB |
NONE |
(1) 4M x 36 |
(1) 512K x 36 |
|
18MB |
(4) 256K x 9 |
(1) 4M x 36 |
(1) 256K x 36 |
|
20MB |
(4) 4M x 9 |
(1) 512K x 36 |
(1) 512K x 36 |
|
20MB |
NONE |
(1) 4M x 36 |
(1) 1M x 36 |
|
24MB |
(4) 4M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
24MB |
(4) 1M x 9 |
(1) 4M x 36 |
(1) 1M x 36 |
|
32MB |
NONE |
(1) 4M x 36 |
(1) 4M x 36 |
|
32MB |
NONE |
NONE |
(1) 8M x 36 |
|
32MB |
(4) 4M x 9 |
NONE |
(1) 4M x 36 |
|
36MB |
(4) 4M x 9 |
(1) 4M x 36 |
(1) 1M x 36 |
|
36MB |
NONE |
(1) 8M x 36 |
(1) 1M x 36 |
|
36MB |
(4) 1M x 9 |
NONE |
(1) 8M x 36 |
|
36MB |
(4) 1M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
40MB |
(4) 1M x 9 |
(1) 8M x 36 |
(1) 1M x 36 |
|
48MB |
NONE |
(1) 8M x 36 |
(1) 4M x 36 |
|
48MB |
(4) 4M x 9 |
NONE |
(1) 8M x 36 |
|
48MB |
(4) 4M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
NONE |
(1) 8M x 36 |
(1) 8M x 36 |
|
64MB |
NONE |
NONE |
(1) 16M x 36 |
|
64MB |
(4) 4M x 9 |
(1) 4M x 36 |
(1) 8M x 36 |
|
64MB |
(4) 16M x 9 |
NONE |
NONE |
|
64MB |
(4) 4M x 9 |
(1) 8M x 36 |
(1) 4M x 36 |
|
64MB |
(4) 16M x 9 |
NONE |
NONE |
|
65MB |
NONE |
(1) 16M x 36 |
(1) 256K x 36 |
|
65MB |
(4) 256K x 9 |
NONE |
(1) 16M x 36 |
|
68MB |
NONE |
(1) 16M x 36 |
(1) 1M x 36 |
|
72MB |
(4) 16M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
72MB |
(4) 1M x 9 |
(1) 16M x 36 |
(1) 1M x 36 |
|
80MB |
NONE |
(1) 16M x 36 |
(1) 4M x 36 |
|
80MB |
(4) 4M x 9 |
NONE |
(1) 16M x 36 |
|
96MB |
(4) 16M x 9 |
(1) 4M x 36 |
(1) 4M x 36 |
|
128MB |
NONE |
(1) 16M x 36 |
(1) 16M x 36 |
|
128MB |
(4) 16M x 9 |
NONE |
(1) 16M x 36 |
|
DRAM JUMPER CONFIGURATION | |||||
|
Bank 0 |
Bank 1 |
Bank 2 |
JP33 |
JP34 |
JP35 |
|
SIMM 1-4 |
SIMM 6 (S) |
SIMM 5 (S) |
Open |
1 & 2 |
Open |
|
SIMM 1-4 |
SIMM 6 (D) |
SIMM 5 (S) |
Open |
1 & 2 |
Closed |
|
SIMM 1-4 |
SIMM 6 (S) |
SIMM 5 (D) |
2 & 3 |
1 & 2 |
Open |
|
SIMM 6 (S) |
SIMM 5 (S) |
SIMM 1-4 |
1 & 2 |
2 & 3 |
Open |
|
SIMM 6 (D) |
SIMM 5 (D) |
SIMM 1-4 |
1 & 2 |
2 & 3 |
Open |
|
SIMM 6 (D) |
SIMM 5 (S) |
NONE |
1 & 2 |
2 & 3 |
Open |
|
SIMM 6 (D) |
SIMM 5 (D) |
SIMM 1-4 |
1 & 2 |
2 & 3 |
Open |
|
Note:Pins designated should be in the closed positon. | |||||
|
DRAM JUMPER CONFIGURATION (CONT) | |||||
|
Bank 0 |
Bank 1 |
Bank 2 |
JP36 |
JP37 |
JP38 |
|
SIMM 1-4 |
SIMM 6 (S) |
SIMM 5 (S) |
2 & 3 |
Open |
2 & 3 |
|
SIMM 1-4 |
SIMM 6 (D) |
SIMM 5 (S) |
2 & 3 |
2 & 3 |
Open |
|
SIMM 1-4 |
SIMM 6 (S) |
SIMM 5 (D) |
2 & 3 |
Open |
2 & 3 |
|
SIMM 6 (S) |
SIMM 5 (S) |
SIMM 1-4 |
1 & 2 |
1 & 2 |
1 & 2 |
|
SIMM 6 (D) |
SIMM 5 (D) |
SIMM 1-4 |
1 & 2 |
1 & 2 |
1 & 2 |
|
SIMM 6 (D) |
SIMM 5 (S) |
NONE |
1 & 2 |
1 & 2 |
1 & 2 |
|
SIMM 6 (D) |
SIMM 5 (D) |
SIMM 1-4 |
1 & 2 |
1 & 2 |
1 & 2 |
|
Note:Pins designated should be in the closed positon. | |||||
|
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) 32K x 8 |
|
256KB |
(4) 64K x 8 |
NONE |
(1) 32K x 8 |
|
512KB |
(4) 64K x 8 |
(4) 64K x 8 |
(1) 32K x 8 |
|
512KB |
(4) 128K x 8 |
NONE |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||||
|
Size |
JP1 |
JP2 |
JP4 |
JP40 |
JP41 |
|
128KB |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
256KB |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3 |
1 & 2 |
|
256KB |
1 & 2 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
|
512KB |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
|
512KB |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE CONFIGURATION | ||||||||
|
Type |
JP8 |
JP9 |
JP10 |
JP11 |
JP12 |
JP13 |
JP14 |
JP15 |
|
CX486SX |
2 & 3 |
Open |
2 & 3 |
Open |
2-3, 4-5 |
Open |
1-2, 3-4 |
2 & 3 |
|
486SX |
2 & 3 |
Open |
2 & 3 |
Open |
Open |
Open |
Open |
Open |
|
486SL |
1 & 2 |
Closed |
2 & 3 |
2 & 3 |
3 & 4 |
Open |
2 & 3 |
4 & 5 |
|
CX486DX |
1 & 2 |
Closed |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
1-2, 3-4 |
2 & 3 |
|
486DX/DX2 |
1 & 2 |
Closed |
2 & 3 |
2 & 3 |
Open |
Open |
Open |
Open |
|
486DX4 |
1 & 2 |
Closed |
2 & 3 |
2 & 3 |
3 & 4 |
Open |
2 & 3 |
4 & 5 |
|
Note: Pins designated should be in the closed position. | ||||||||
|
CPU TYPE CONFIGURATION (CONT) | |||||||
|
Type |
JP21 |
JP22 |
JP24 |
JP25 |
JP46 |
JP48 |
JP50 |
|
CX486SX |
1 & 2 |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3 |
2 & 3 |
|
486SX |
2 & 3 |
1 & 2 |
1 & 2 |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
|
486SL |
2 & 3 |
1 & 2 |
Open |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
|
CX486DX |
1 & 2 |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3 |
2 & 3 |
|
486DX/DX2 |
2 & 3 |
1 & 2 |
1 & 2 |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
|
486DX4 |
2 & 3 |
1 & 2 |
Open |
Open |
2 & 3 |
1 & 2 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | |||||||
|
CPU SPEED CONFIGURATION | ||||||||
|
Speed |
JP5 |
JP6 |
JP7 |
JP20 |
JP32 |
JP47 |
JP49 |
JP51 |
|
20MHz |
Closed |
Open |
Closed |
1 & 2 |
Closed |
Open |
Open |
Open |
|
25MHz |
Closed |
Closed |
Open |
1 & 2 |
Closed |
Open |
Open |
Open |
|
33MHz |
Open |
Closed |
Closed |
1 & 2 |
Closed |
Open |
Open |
Open |
|
40MHz |
Closed |
Open |
Open |
2 & 3 |
Closed |
Open |
Open |
Open |
|
50iMHz |
Closed |
Closed |
Open |
1 & 2 |
Closed |
Open |
Open |
Open |
|
50MHz |
Open |
Open |
Closed |
1 & 2 |
Closed |
Open |
Open |
Open |
|
66iMHz |
Open |
Closed |
Closed |
1 & 2 |
Closed |
Open |
Open |
Open |
|
Note: Pins designated should be in the closed position. | ||||||||
|
CPU SPEED CONFIGURATION (DX4 ONLY) | ||||||||
|
Speed |
JP5 |
JP6 |
JP7 |
JP20 |
JP32 |
JP47 |
JP49 |
JP51 |
|
25/75MHz |
Closed |
Closed |
Open |
1 & 2 |
Open |
2 & 3 |
1 & 2 |
Open |
|
33/83MHz |
Open |
Closed |
Closed |
1 & 2 |
Open |
2 & 3 |
Open |
Closed |
|
33/100MHz |
Open |
Closed |
Closed |
1 & 2 |
Open |
1 & 2 |
1 & 2 |
Open |
|
50/100MHz |
Open |
Open |
Closed |
1 & 2 |
Open |
1 & 2 |
2 & 3 |
Open |
|
Note: Pins designated should be in the closed position. | ||||||||
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
JP28 |
|
0 wait states |
pins 1 & 2 closed |
|
1 wait state |
pins 2 & 3 closed |
|
VESA BUS SPEED CONFIGURATION | |
|
CPU speed |
JP29 |
|
< = 33MHz |
pins 1 & 2 closed |
|
> 33MHz |
pins 2 & 3 closed |
|
GREEN PC CONFIGURATION | |
|
Description |
JP45 |
|
Control video HSYNC |
pin 1 |
|
Ground |
pin 2 |
|
Control video VSYNC |
pin 3 |
|
Ground |
pin 4 |
|
Control ENVIDEO |
pin 5 |
|
Ground |
pin 6 |
|
Monitor AC power |
pin 7 |
|
Ground |
pin 8 |