ABIT COMPUTER CORPORATION
PI4/PI4T PCI
|
Processor |
80486SX/SL80486SX/CX486M7/AM486DX/AM486DXL PLUS/80486DX/ SL80486DX2/AM486DX2/80486DX2/AM486DX4/80486DX4/P24D/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
128MB |
|
Cache |
128/256/512/1024KB |
|
BIOS |
AMI/Award |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit PCI bus slots (3), green PC connector, IDE interfaces (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J3 |
Speaker |
J10 |
|
IDE interface (primary) |
J4 |
Power LED & keylock |
J11 |
|
IDE interface (secondary) |
J5 |
IDE interface LED |
JP10 |
|
Green PC connector |
J6 |
IDE interface LED |
JP11 |
|
Turbo LED |
J7 |
Green PC connector |
JP38 |
|
Reset switch |
J8 |
32-bit PCI bus slots |
SL1 - SL3 |
|
Turbo switch |
J9 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CX486S2 CPU not installed |
JP1 |
Open |
|
CX486S2 CPU installed |
JP1 |
Closed | |
|
|
Cache type select write back (P24D only) |
JP2 |
pins 1 & 2 closed |
|
Cache type select write through (P24D only) |
JP2 |
pins 2 & 3 closed | |
|
|
Cache type select write back (P24T only) |
JP3 |
pins 1 & 2 closed |
|
Cache type select write through (P24T only) |
JP3 |
pins 2 & 3 closed | |
|
|
Primary IDE IRQ14 enabled |
JP12 |
Closed |
|
Primary IDE IRQ14 disabled |
JP12 |
Open | |
|
|
Secondary IDE IRQ15 enabled |
JP13 |
Closed |
|
Secondary IDE IRQ15 disabled |
JP13 |
Open | |
|
|
Factory configured - do not alter |
JP14 |
pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP26 |
pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP27 |
pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP28 |
pins 2 & 3, 4 & 5 closed |
|
|
Factory configured - do not alter |
JP40 |
pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP43 |
pins 2 & 3 closed |
|
|
Monitor type select color |
JP44 |
Closed |
|
Monitor type select monochrome |
JP44 |
Open | |
|
Note: The location of the factory configured jumpers is unidentified. | |||
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
5MB |
(1) 256K x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
8MB |
(1) 2M x 36 |
NONE |
NONE |
NONE |
|
12MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
16MB |
(1) 4M x 36 |
NONE |
NONE |
NONE |
|
17MB |
(1) 256K x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
20MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 4M x 36 |
NONE |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
24MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
|
24MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
|
24MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
32MB |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
32MB |
(1) 8M x 36 |
NONE |
NONE |
NONE |
|
36MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
36MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
36MB |
(1) 1M x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
40MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
DRAM CONFIGURATION (CONT) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
40MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 8M x 36 |
NONE |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
48MB |
(1) 4M x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 16M x 36 |
NONE |
NONE |
NONE |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 8M x 36 |
NONE |
|
64MB |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
65MB |
(1) 256K x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
68MB |
(1) 1M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
68MB |
(1) 1M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
72MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 16M x 36 |
NONE |
|
72MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
80MB |
(1) 4M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
80MB |
(1) 4M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
96MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 16M x 36 |
NONE |
|
96MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
96MB |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
128MB |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
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) 32K 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 |
|
1MB |
(4) 128K x 8 |
(4) 128K x 8 |
(1) 64K x 8 |
|
CACHE JUMPER CONFIGURATION | |||||
|
Size |
JP23 |
JP24 |
JP25 |
JP36 |
JP37 |
|
128KB |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
|
256KB |
2 & 3 |
1 & 2 |
2 & 3 |
1 & 2 |
2 & 3, 4 & 5 |
|
256KB |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
|
512KB |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3, 4 & 5 |
|
512KB |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
|
1MB |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3, 4 & 5 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE CONFIGURATION | |||||
|
Type |
JP4 |
JP7 |
JP8 |
JP9 |
JP15 |
|
80486SX |
1 & 2, 3 & 4 |
Open |
Open |
2 & 3 |
Open |
|
SL80486SX |
1 & 2, 3 & 4 |
3 & 4 |
Open |
2 & 3 |
Open |
|
CX486M7 (3v) |
Open |
2 & 3 |
2 & 3 |
1 & 2, 3 & 4 |
3 & 4 |
|
CX486M7 (5v) |
1 & 2, 3 & 4 |
2 & 3 |
2 & 3 |
1 & 2, 3 & 4 |
3 & 4 |
|
AM486DX/DX2 (5v) |
1 & 2, 3 & 4 |
Open |
Open |
1 & 2, 3 & 4 |
3 & 4 |
|
AM486DX2/DX4 (3v) |
Open |
Open |
Open |
1 & 2, 3 & 4 |
3 & 4 |
|
AM486DXL PLUS |
1 & 2, 3 & 4 |
3 & 4 |
Open |
1 & 2, 3 & 4 |
3 & 4 |
|
80486DX/DX2 |
1 & 2, 3 & 4 |
Open |
Open |
1 & 2, 3 & 4 |
3 & 4 |
|
SL80486DX/DX2 |
1 & 2, 3 & 4 |
3 & 4 |
Open |
1 & 2, 3 & 4 |
3 & 4 |
|
80486DX4 |
Open |
3 & 4 |
Open |
1 & 2, 3 & 4 |
3 & 4 |
|
P24D |
1 & 2, 3 & 4 |
1 & 2, 3 & 4 |
Open |
1 & 2, 3 & 4 |
3 & 4 |
|
P24T |
1 & 2, 3 & 4 |
3 & 4 |
1 & 2 |
1 & 2, 3 & 4 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE CONFIGURATION (CONT) | ||||
|
Type |
JP16 |
JP17 |
JP18 |
JP19 |
|
80486SX |
2 & 3 |
Open |
Open |
Open |
|
SL80486SX |
2 & 3 |
Open |
1 & 2 |
Open |
|
CX486M7 (3v) |
1 & 2 |
Open |
1 & 2 |
Open |
|
CX486M7 (5v) |
1 & 2 |
Open |
1 & 2 |
Open |
|
AM486DX/DX2 (5v) |
Open |
Open |
Open |
Open |
|
AM486DX2/DX4 (3v) |
Open |
Open |
Open |
Open |
|
AM486DXL PLUS |
2 & 3 |
Open |
1 & 2 |
2 & 3 |
|
80486DX/DX2 |
2 & 3 |
Open |
Open |
Open |
|
SL80486DX/DX2 |
2 & 3 |
Open |
1 & 2 |
Open |
|
80486DX4 |
2 & 3 |
Open |
1 & 2 |
Open |
|
P24D |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
P24T |
1 & 2 |
1 & 2 |
1 & 2 |
Open |
|
Note: Pins designated should be in the closed position. | ||||
|
CPU TYPE CONFIGURATION (CONT) | ||||
|
Type |
JP20 |
JP21 |
JP22 |
JP39 |
|
80486SX |
Open |
Open |
Open |
1 & 2 |
|
SL80486SX |
2 & 3 |
1 & 2 |
4 & 5 |
1 & 2 |
|
CX486M7 (3v) |
1 & 2 |
Open |
2 & 3 |
1 & 2 |
|
CX486M7 (5v) |
1 & 2 |
Open |
2 & 3 |
1 & 2 |
|
AM486DX/DX2 (5v) |
Open |
Open |
Open |
1 & 2 |
|
AM486DX2/DX4 (3v) |
Open |
Open |
Open |
1 & 2 |
|
AM486DXL PLUS |
2 & 3 |
4 & 5 |
4 & 5 |
1 & 2 |
|
80486DX/DX2 |
Open |
Open |
Open |
1 & 2 |
|
SL80486DX/DX2 |
2 & 3 |
1 & 2 |
4 & 5 |
1 & 2 |
|
80486DX4 |
2 & 3 |
1 & 2 |
4 & 5 |
Open |
|
P24D |
2 & 3 |
2 & 3 |
4 & 5 |
1 & 2 |
|
P24T |
2 & 3 |
Open |
1 & 2 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | ||||
|
CPU TYPE CONFIGURATION (CONT) | |||||
|
Type |
JP46 |
JP47 |
JP48 |
JP49 |
JP50 |
|
AM486DX2 |
Open |
Closed |
Open |
Closed |
Closed |
|
CX486DX2-50 |
Closed |
Open |
Open |
Open |
Open |
|
CX486DX2-66 |
Open |
Open |
Closed |
Open |
Open |
|
CX486DX2-80 |
Open |
Open |
Open |
Closed |
Open |
|
AM486DX/DX4 |
Open |
Closed |
Open |
Closed |
Open |
|
80486DX4-75 |
Closed |
Open |
Open |
Open |
Open |
|
80486DX4-100 |
Open |
Closed |
Open |
Closed |
Open |
|
Note: Pins designated should be in the closed position. These settings used only if JP4 is open. | |||||
|
CPU SPEED CONFIGURATION | ||||
|
Speed |
JP30 |
JP31 |
JP32 |
JP33 |
|
25MHz |
Open |
Open |
Open |
pins 1 & 2 closed |
|
33MHz |
Open |
Closed |
Closed |
pins 1 & 2 closed |
|
40MHz |
Open |
Open |
Closed |
pins 2 & 3 closed |
|
50iMHz |
Open |
Open |
Open |
pins 1 & 2 closed |
|
50MHz |
Open |
Closed |
Open |
pins 2 & 3 closed |
|
66iMHz |
Open |
Closed |
Closed |
pins 1 & 2 closed |
|
75iMHz |
Open |
Open |
Open |
pins 1 & 2 closed |
|
80iMHz |
Open |
Open |
Closed |
pins 2 & 3 closed |
|
100iMHz |
Open |
Closed |
Closed |
pins 1 & 2 closed |
|
CMOS DISCHARGE CONFIGURATION | ||
|
Setting |
JP6 |
JP35 |
|
CMOS memory normal operation |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
CMOS memory clear |
pins 2 & 3 closed |
pins 2 & 3 closed |