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 |