ABIT COMPUTER CORPORATION
PB4 (REV.1.1)
|
Processor |
80486SX/SL AM486DX/80486DX/CX486DX2/AM486DX2/80486DX2/ CX486DX4/80486DX4/CX M1/P24D/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)/ 120(internal)MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
64MB |
|
Cache |
128/256KB |
|
BIOS |
Award |
|
Dimensions |
220mm x 220mm |
|
I/O Options |
32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2), PISA slot |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Floppy drive interface |
CN1 |
Power LED & keylock |
JW1 |
|
Parallel port |
CN2 |
Speaker |
JW2 |
|
IDE interface 2 |
CN3 |
Turbo LED |
JW3 |
|
IDE interface 1 |
CN4 |
Turbo switch |
JW4 |
|
Serial port 2 |
J3 |
Reset switch |
JW5 |
|
Serial port 1 |
J4 |
32-bit PCI slots |
PC1 - PC3 |
|
IDE interface LED |
JP16 |
PISA slot |
SL1 |
|
External battery |
JP18 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
» |
Factory configured - do not alter |
JP12 |
pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
JP13 |
Open |
|
» |
Factory configured - do not alter |
JP14 |
Open |
|
» |
CMOS memory normal operation |
JP17 |
pins 1 & 2 closed |
|
CMOS memory clear |
JP17 |
pins 2 & 3 closed | |
|
Note: The location of jumpers JP12 and JP14 are unidentified. | |||
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(1) 256K x 36 |
NONE |
|
2MB |
(1) 512K x 36 |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
|
3MB |
(1) 256K x 36 |
(1) 512K x 36 |
|
3MB |
(1) 512K x 36 |
(1) 256K x 36 |
|
4MB |
(1) 1M x 36 |
NONE |
|
4MB |
(1) 512K x 36 |
(1) 512K x 36 |
|
5MB |
(1) 256K x 36 |
(1) 1M x 36 |
|
5MB |
(1) 1M x 36 |
(1) 256K x 36 |
|
6MB |
(1) 512K x 36 |
(1) 1M x 36 |
|
6MB |
(1) 1M x 36 |
(1) 512K x 36 |
|
8MB |
(1) 2M x 36 |
NONE |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
|
9MB |
(1) 256K x 36 |
(1) 2M x 36 |
|
9MB |
(1) 2M x 36 |
(1) 256K x 36 |
|
10MB |
(1) 512K x 36 |
(1) 2M x 36 |
|
10MB |
(1) 2M x 36 |
(1) 512K x 36 |
|
12MB |
(1) 1M x 36 |
(1) 2M x 36 |
|
12MB |
(1) 2M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 4M x 36 |
NONE |
|
16MB |
(1) 2M x 36 |
(1) 2M x 36 |
|
17MB |
(1) 256K x 36 |
(1) 4M x 36 |
|
17MB |
(1) 4M x 36 |
(1) 256K x 36 |
|
18MB |
(1) 512K x 36 |
(1) 4M x 36 |
|
18MB |
(1) 4M x 36 |
(1) 512K x 36 |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
|
20MB |
(1) 4M x 36 |
(1) 1M x 36 |
|
24MB |
(1) 2M x 36 |
(1) 4M x 36 |
|
24MB |
(1) 4M x 36 |
(1) 2M x 36 |
|
32MB |
(1) 8M x 36 |
NONE |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
|
33MB |
(1) 256K x 36 |
(1) 8M x 36 |
|
33MB |
(1) 8M x 36 |
(1) 256K x 36 |
|
DRAM CONFIGURATION (CON’T) | ||
|
Size |
Bank 0 |
Bank 1 |
|
34MB |
(1) 512K x 36 |
(1) 8M x 36 |
|
34MB |
(1) 8M x 36 |
(1) 512K x 36 |
|
36MB |
(1) 1M x 36 |
(1) 8M x 36 |
|
36MB |
(1) 8M x 36 |
(1) 1M x 36 |
|
40MB |
(1) 2M x 36 |
(1) 8M x 36 |
|
40MB |
(1) 8M x 36 |
(1) 2M x 36 |
|
48MB |
(1) 4M x 36 |
(1) 8M x 36 |
|
48MB |
(1) 8M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 8M x 36 |
(1) 8M x 36 |
|
CACHE CONFIGURATION | ||
|
Size |
Bank 0 |
TAG |
|
128KB |
(4) 32K x 8 |
(1) 16K or (1) 32K x 8 |
|
256KB |
(4) 64K x 8 |
(1) 16K or (1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |
|
Size |
JP3 |
|
128KB |
pins 1 & 2 closed |
|
256KB |
pins 2 & 3 closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP5 |
JP8 |
JP9 |
|
80486SX |
Open |
Open |
Open |
|
SL AM486DX |
pins 2 & 3 closed |
Open |
pins 1 & 2 closed |
|
80486DX |
Open |
Open |
Open |
|
CX486DX2 |
pins 1 & 2 closed |
Open |
pins 2 & 3 closed |
|
AM486DX2 |
Open |
Closed |
Open |
|
80486DX2 |
Open |
Open |
Open |
|
CX486DX4 |
pins 1 & 2 closed |
Open |
pins 2 & 3 closed |
|
AM486DX4 |
Open |
Open |
Open |
|
80486DX4 |
Open |
Open |
Open |
|
CX M1 |
pins 2 & 3 closed |
Open |
pins 1 & 2 closed |
|
P24D |
pins 2 & 3 closed |
Open |
pins 1 & 2 closed |
|
P24T |
Open |
Open |
Open |
|
CPU TYPE CONFIGURATION | |||
|
Type |
RJ1 |
RJ2 |
RJ3 |
|
80486SX |
pins 1 - 8 closed |
Installed |
Not installed |
|
SL AM486DX |
pins 3 - 10 closed |
Installed |
Not installed |
|
80486DX |
pins 1 - 8 closed |
Installed |
Not installed |
|
CX486DX2 |
pins 1 - 8 closed |
Not installed |
Installed |
|
AM486DX2 |
pins 1 - 8 closed |
Installed |
Not installed |
|
80486DX2 |
pins 1 - 8 closed |
Installed |
Not installed |
|
CX486DX4 |
pins 1 - 8 closed |
Not installed |
Installed |
|
AM486DX4 |
pins 1 - 8 closed |
Installed |
Not installed |
|
80486DX4 |
pins 1 - 8 closed |
Installed |
Not installed |
|
CX M1 |
pins 1 - 8 closed |
Installed |
Not installed |
|
P24D |
pins 3 - 10 closed |
Installed |
Not installed |
|
P24T |
pins 7 - 14 closed |
Installed |
Not installed |
|
Note: Pins designated should be in the closed position. | |||
|
CPU SPEED CONFIGURATION | ||
|
Speed |
JP4 |
JP11 |
|
25MHz |
Open |
Open |
|
33MHz |
Closed |
Closed |
|
40MHz |
Closed |
Open |
|
50iMHz |
Open |
Open |
|
66iMHz |
Closed |
Closed |
|
75iMHz |
Open |
Open |
|
80iMHz |
Closed |
Open |
|
100iMHz |
Closed |
Closed |
|
120iMHz |
Closed |
Open |
|
CPU VOLTAGE CONFIGURATION | ||
|
Voltage |
JP1 |
JP2 |
|
3.45v |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
3.6v |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
4v |
pins 4 & 5 closed |
pins 2 & 3 closed |
|
5v |
pins 1 & 2 closed |
pins 1 & 2 closed |