ABIT COMPUTER CORPORATION
PM4T (REV. 1.0)
|
Processor |
80486SX/SL80486SX/AM486DX/CX486DX/80486DX/SL80486DX/CX486DX2/ CX486DX2V/AM486DX2/(SL)AM486DX2/80486DX2/SL80486DX2/AM486DX4/ 80486DX4/P24D/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
256MB |
|
Cache |
128/256KB |
|
BIOS |
Award |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
IDE interface 1 |
CN1 |
Speaker |
JW2 |
|
IDE interface 2 |
CN2 |
Turbo LED |
JW3 |
|
Parallel port |
CN3 |
Turbo switch |
JW4 |
|
Floppy drive interface |
CN4 |
Reset switch |
JW5 |
|
Serial port 1 |
J3 |
IDE interface LED |
JW6 |
|
Serial port 2 |
J4 |
IDE interface LED |
JW7 |
|
External battery |
JP42 |
PS/2 mouse port |
MS1 |
|
Green PC connector |
JP43 |
32-bit PCI slots |
PC1 - PC4 |
|
Power LED & keylock |
JW1 | ||
|
Note: The location of JP42 is unidentified. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
» |
Factory configured - do not alter |
JP1 |
N/A |
|
» |
CPU type select non 5v CPU |
JP18 |
pins 3 & 5, 4 & 6 closed |
|
CPU type select 5v CPU |
JP18 |
pins 1 & 3, 2 & 4 closed | |
|
» |
Factory configured - do not alter |
JP23 |
Open |
|
» |
Factory configured - do not alter |
JP25 |
Open |
|
» |
Factory configured - do not alter |
JP27 |
N/A |
|
» |
Factory configured - do not alter |
JP30 |
N/A |
|
» |
Factory configured - do not alter |
JP31 |
N/A |
|
» |
Factory configured - do not alter |
JP33 |
N/A |
|
» |
CMOS memory normal operation |
JP37 |
pins 1 & 2 closed |
|
CMOS memory clear |
JP37 |
pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
JP51 |
Open |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
NONE |
NONE |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
2MB |
(1) 512K x 36 |
NONE |
NONE |
NONE |
|
3MB |
(1) 512K x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
3MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
4MB |
(1) 512K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
4MB |
(1) 512K x 36 |
(1) 512K x 36 |
NONE |
NONE |
|
5MB |
(1) 1M x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
5MB |
(1) 512K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
6MB |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
6MB |
(1) 512K x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
6MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 512K x 36 |
NONE |
|
7MB |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
DRAM CONFIGURATION (CON’T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
8MB |
(1) 2M x 36 |
NONE |
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 |
|
10MB |
(1) 2M x 36 |
(1) 256K x 36 |
(1) 256K 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) 1M x 36 |
(1) 2M x 36 |
NONE |
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) 512K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 2M 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) 4M x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
18MB |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
18MB |
(1) 512K x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
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) 1M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
20MB |
(1) 2M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
20MB |
(1) 4M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
24MB |
(1) 2M x 36 |
(1) 4M 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 |
|
26MB |
(1) 512K x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
28MB |
(1) 1M 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 |
|
32MB |
(1) 4M 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 |
|
33MB |
(1) 8M x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
34MB |
(1) 8M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
34MB |
(1) 512K x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
34MB |
(1) 512K x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
35MB |
(1) 8M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K 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 |
|
36MB |
(1) 8M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
40MB |
(1) 2M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
DRAM CONFIGURATION (CON’T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
40MB |
(1) 2M x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
40MB |
(1) 4M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
40MB |
(1) 8M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
40MB |
(1) 8M x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
44MB |
(1) 8M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
48MB |
(1) 4M x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
48MB |
(1) 8M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
48MB |
(1) 8M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
50MB |
(1) 512K x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
52MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
56MB |
(1) 2M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
56MB |
(1) 8M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
64MB |
(1) 8M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
64MB |
(1) 16M x 36 |
NONE |
NONE |
NONE |
|
65MB |
(1) 16M x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
66MB |
(1) 16M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
66MB |
(1) 512K x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
66MB |
(1) 512K x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
67MB |
(1) 16M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
68MB |
(1) 1M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
68MB |
(1) 1M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
68MB |
(1) 16M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
72MB |
(1) 2M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
72MB |
(1) 2M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
72MB |
(1) 16M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
72MB |
(1) 16M x 36 |
(1) 2M x 36 |
NONE |
NONE |
|
76MB |
(1) 16M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
80MB |
(1) 4M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
80MB |
(1) 4M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
80MB |
(1) 8M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
80MB |
(1) 16M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
NONE |
|
80MB |
(1) 16M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
88MB |
(1) 16M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
(1) 2M x 36 |
|
96MB |
(1) 8M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
96MB |
(1) 16M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
96MB |
(1) 16M x 36 |
(1) 8M x 36 |
NONE |
NONE |
|
96MB |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
98MB |
(1) 512K x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
100MB |
(1) 1M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
104MB |
(1) 2M 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 |
|
DRAM CONFIGURATION (CON’T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
112MB |
(1) 16M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
128MB |
(1) 16M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
NONE |
|
128MB |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
128MB |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
130MB |
(1) 512K x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
|
132MB |
(1) 1M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
|
136MB |
(1) 2M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
|
144MB |
(1) 4M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
|
160MB |
(1) 8M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
|
160MB |
(1) 16M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
(1) 8M x 36 |
|
192MB |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
|
194MB |
(1) 512K x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
|
196MB |
(1) 1M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
|
200MB |
(1) 2M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
|
208MB |
(1) 4M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
|
224MB |
(1) 8M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
|
256MB |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
|
Note: Board will accept x 32 SIMMs also. | ||||
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K or (1) 16K x 8 |
|
256KB (A) |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 16K or (1) 32K x 8 |
|
256KB (B) |
(4) 64K x 8 |
NONE |
(1) 16K or (1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||
|
Size |
JP2 |
JP3 |
JP6 |
|
128KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
256KB (A) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
256KB (B) |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
CPU TYPE CONFIGURATION | |||||
|
Type |
RN6 |
RN10 |
RN14 |
RN16 |
RN17 |
|
80486SX |
Not installed |
1 - 8 |
Not installed |
Not installed |
9 - 16 |
|
SL80486SX |
Not installed |
1 - 8 |
Not installed |
Not installed |
9 - 16 |
|
AM486DX |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
CX486DX |
1 - 8 |
Not installed |
1 - 8 |
Not installed |
1 - 8 |
|
80486DX |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
SL80486DX |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
CX486DX2 |
1 - 8 |
Not installed |
1 - 8 |
Not installed |
1 - 8 |
|
CX486DX2V |
1 - 8 |
Not installed |
1 - 8 |
Not installed |
1 - 8 |
|
AM486DX2 |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
(SL)AM486DX2 |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
80486DX2 |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE CONFIGURATION (CON’T) | |||||
|
Type |
RN6 |
RN10 |
RN14 |
RN16 |
RN17 |
|
SL80486DX2 |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
AM486DX4 |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
80486DX4 |
Not installed |
1 - 8 |
1 - 8 |
Not installed |
5 - 12 |
|
P24D |
Not installed |
1 - 8 |
1 - 8 |
1 - 8 |
Not installed |
|
P24T |
Not installed |
3 - 10 |
3 - 10 |
9 - 16 |
Not installed |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU TYPE CONFIGURATION (CON’T) | |||
|
Type |
JP13 |
JP24 |
JP32 |
|
80486SX |
Open |
Open |
Open |
|
SL80486SX |
Open |
Open |
Open |
|
AM486DX |
pins 1 & 2 closed |
Open |
Open |
|
CX486DX |
Open |
Open |
Open |
|
80486DX |
Open |
Open |
Open |
|
SL80486DX |
Open |
Open |
Open |
|
CX486DX2 |
Open |
Open |
Open |
|
CX486DX2V |
Open |
Open |
Open |
|
AM486DX2 |
pins 1 & 2 closed |
Open |
Open |
|
(SL)AM486DX2 |
pins 1 & 2 closed |
Open |
Closed |
|
80486DX2 |
Open |
Open |
Open |
|
SL80486DX2 |
Open |
Open |
Open |
|
AM486DX4 |
pins 1 & 2 closed |
Open |
Open |
|
80486DX4 |
Open |
Open |
Open |
|
P24D |
Open |
pins 1 & 2 closed |
Open |
|
P24T |
Open |
Open |
Open |
|
CPU SPEED CONFIGURATION | ||
|
Speed |
JP12 |
JP14 |
|
25MHz |
Open |
Open |
|
33MHz |
Closed |
Closed |
|
40MHz |
Open |
Closed |
|
50iMHz |
Open |
Open |
|
66iMHz |
Closed |
Closed |
|
75iMHz |
Open |
Open |
|
80iMHz |
Open |
Closed |
|
100iMHz |
Closed |
Closed |
|
CPU VOLTAGE CONFIGURATION | |||||
|
Voltage |
JP18 |
JP19 |
JP20 |
JP21 |
JP22 |
|
3.3v |
pins 3 & 5, 4 & 6 closed |
Closed |
Open |
Open |
Open |
|
3.45v |
pins 3 & 5, 4 & 6 closed |
Open |
Closed |
Open |
Open |
|
3.6v |
pins 3 & 5, 4 & 6 closed |
Open |
Open |
Closed |
Open |
|
4v |
pins 3 & 5, 4 & 6 closed |
Open |
Open |
Open |
Closed |
|
5v |
pins 1 & 3, 2 & 4 closed |
N/A |
N/A |
N/A |
N/A |