ABIT COMPUTER CORPORATION
AN4R2/AN4TR2
Processor | 80486SX/CX486M7/80486DX/80486DX2/80486DX4 |
Processor Speed | 20/25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz |
Chip Set | Unidentified |
Max. Onboard DRAM | 128MB |
Cache | 128/256/512KB |
BIOS | AMI/Award |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit VESA local bus slots (3), green PC connector |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | JW1 | External battery | JP25 |
Speaker | JW2 | Green PC connector (monitor) | JP46 (pins 1, 3, 5) |
Reset switch | JW3 | Green PC connector (power) | JP46 (pins 7 & 8) |
Turbo switch | JW4 | 32-bit VESA local bus slots | SL1 - SL3 |
Turbo LED | JW5 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Factory configured - do not alter | JP3 | Open |
» | Factory configured - do not alter | JP4 | pins 1 & 2 closed |
» | Factory configured - do not alter | JP5 | Open |
» | Factory configured - do not alter | JP6 | Open |
» | Factory configured - do not alter | JP8 | pins 1 & 2 closed |
» | Factory configured - do not alter | JP13 | Closed |
» | Factory configured - do not alter | JP14 | pins 1 & 2 closed |
» | Factory configured - do not alter | JP15 | Open |
» | Factory configured - do not alter | JP16 | Closed |
» | Factory configured - do not alter | JP17 | Open |
» | CMOS memory normal operation | JP21 | pins 1 & 2 closed |
CMOS memory clear | JP21 | pins 2 & 3 closed | |
» | Factory configured - do not alter | JP41 | Open |
» | Factory configured - do not alter | JP45 | Open |
» | Factory configured - do not alter | JP49 | pins 1 & 2 closed |
DRAM CONFIGURATION | ||||
Size | SIMM 1 - 4 | SIMM 5 - 8 | SIMM 9 | SIMM 10 |
1MB | NONE | NONE | (1) 256K x 36 | NONE |
1MB | (4) 256K x 9 | NONE | NONE | NONE |
1MB | (4) 256K x 9 | NONE | NONE | NONE |
2MB | NONE | NONE | (1) 256K x 36 | (1) 256K x 36 |
2MB | (4) 256K x 9 | NONE | NONE | (1) 256K x 36 |
2MB | NONE | NONE | (1) 512K x 36 | NONE |
2MB | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE |
4MB | NONE | NONE | (1) 1M x 36 | NONE |
4MB | (4) 1M x 9 | NONE | NONE | NONE |
4MB | NONE | NONE | (1) 512K x 36 | (1) 512K x 36 |
4MB | (4) 256K x 9 | NONE | (1) 512K x 36 | (1) 256K x 36 |
4MB | (4) 256K x 9 | (4) 256K x 9 | (1) 512K x 36 | NONE |
5MB | NONE | NONE | (1) 256K x 36 | (1) 1M x 36 |
5MB | (4) 256K x 9 | NONE | NONE | (1) 1M x 36 |
6MB | (4) 1M x 9 | NONE | (1) 256K x 36 | (1) 256K x 36 |
6MB | (4) 256K x 9 | NONE | (1) 1M x 36 | (1) 256K x 36 |
6MB | NONE | NONE | (1) 512K x 36 | (1) 1M x 36 |
6MB | (4) 256K x 9 | (4) 256K x 9 | (1) 1M x 36 | NONE |
8MB | NONE | NONE | (1) 1M x 36 | (1) 1M x 36 |
8MB | (4) 1M x 9 | NONE | NONE | (1) 1M x 36 |
8MB | NONE | NONE | (1) 2M x 36 | NONE |
8MB | (4) 1M x 9 | NONE | (1) 512K x 36 | (1) 512K x 36 |
8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
10MB | (4) 1M x 9 | (4) 1M x 9 | (1) 256K x 36 | (1) 256K x 36 |
10MB | (4) 256K x 9 | (4) 256K x 9 | (1) 1M x 36 | (1) 1M x 36 |
12MB | (4) 1M x 9 | NONE | (1) 1M x 36 | (1) 1M x 36 |
DRAM CONFIGURATION (CON’T) | ||||
Size | SIMM 1 - 4 | SIMM 5 - 8 | SIMM 9 | SIMM 10 |
12MB | (4) 1M x 9 | NONE | (1) 1M x 36 | (1) 1M x 36 |
12MB | (4) 1M x 9 | (4) 1M x 9 | (1) 512K x 36 | (1) 512K x 36 |
12MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | NONE |
16MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
16MB | NONE | NONE | (1) 4M x 36 | NONE |
16MB | (4) 4M x 9 | NONE | NONE | NONE |
16MB | NONE | NONE | (1) 2M x 36 | (1) 2M x 36 |
16MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
16MB | (4) 4M x 9 | NONE | NONE | NONE |
17MB | NONE | NONE | (1) 256K x 36 | (1) 4M x 36 |
17MB | (4) 256K x 9 | NONE | NONE | (1) 4M x 36 |
18MB | (4) 4M x 9 | NONE | (1) 256K x 36 | (1) 256K x 36 |
18MB | (4) 256K x 9 | NONE | (1) 4M x 36 | (1) 256K x 36 |
18MB | NONE | NONE | (1) 512K x 36 | (1) 4M x 36 |
18MB | (4) 256K x 9 | (4) 256K x 9 | (1) 4M x 36 | NONE |
20MB | NONE | NONE | (1) 1M x 36 | (1) 4M x 36 |
20MB | (4) 1M x 9 | NONE | NONE | (1) 4M x 36 |
20MB | (4) 4M x 9 | NONE | (1) 512K x 36 | (1) 512K x 36 |
24MB | (4) 4M x 9 | NONE | (1) 1M x 36 | (1) 1M x 36 |
24MB | (4) 1M x 9 | NONE | (1) 4M x 36 | (1) 1M x 36 |
24MB | (4) 1M x 9 | (4) 4M x 9 | (1) 512K x 36 | (1) 512K x 36 |
24MB | (4) 1M x 9 | (4) 1M x 9 | (1) 4M x 36 | NONE |
32MB | NONE | NONE | (1) 4M x 36 | (1) 4M x 36 |
32MB | (4) 4M x 9 | NONE | NONE | (1) 4M x 36 |
32MB | NONE | NONE | (1) 8M x 36 | NONE |
32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
36MB | (4) 4M x 9 | NONE | (1) 1M x 36 | (1) 4M x 36 |
36MB | (4) 1M x 9 | NONE | (1) 4M x 36 | (1) 4M x 36 |
36MB | (4) 4M x 9 | (4) 4M x 9 | (1) 512K x 36 | (1) 512K x 36 |
36MB | (4) 1M x 9 | NONE | (1) 8M x 36 | NONE |
36MB | (4) 1M x 9 | (4) 4M x 9 | (1) 4M x 36 | NONE |
40MB | (4) 4M x 9 | (4) 4M x 9 | (1) 1M x 36 | (1) 1M x 36 |
40MB | (4) 1M x 9 | NONE | (1) 8M x 36 | (1) 1M x 36 |
40MB | (4) 1M x 9 | (4) 1M x 9 | (1) 8M x 36 | NONE |
40MB | (4) 1M x 9 | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
48MB | (4) 4M x 9 | NONE | (1) 4M x 36 | (1) 4M x 36 |
48MB | (4) 4M x 9 | NONE | (1) 4M x 36 | (1) 4M x 36 |
48MB | (4) 4M x 9 | NONE | (1) 8M x 36 | NONE |
48MB | (4) 4M x 9 | (4) 4M x 9 | (1) 4M x 36 | NONE |
64MB | (4) 4M x 9 | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 |
64MB | NONE | NONE | (1) 16M x 36 | NONE |
64MB | (4) 16M x 9 | NONE | NONE | NONE |
64MB | NONE | NONE | (1) 8M x 36 | (1) 8M x 36 |
64MB | (4) 4M x 9 | NONE | (1) 8M x 36 | (1) 4M x 36 |
DRAM CONFIGURATION (CON’T) | ||||
Size | SIMM 1 - 4 | SIMM 5 - 8 | SIMM 9 | SIMM 10 |
64MB | (4) 4M x 9 | (4) 4M x 9 | (1) 8M x 36 | NONE |
64MB | (4) 4M x 9 | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 |
64MB | (4) 16M x 9 | NONE | NONE | NONE |
65MB | NONE | NONE | (1) 256K x 36 | (1) 16M x 36 |
65MB | (4) 256K x 9 | NONE | NONE | (1) 16M x 36 |
68MB | NONE | NONE | (1) 1M x 36 | (1) 16M x 36 |
68MB | (4) 1M x 9 | NONE | NONE | (1) 16M x 36 |
68MB | (4) 1M x 9 | (4) 16M x 9 | NONE | NONE |
72MB | (4) 16M x 9 | NONE | (1) 1M x 36 | (1) 1M x 36 |
72MB | (4) 1M x 9 | NONE | (1) 16M x 36 | (1) 1M x 36 |
72MB | (4) 1M x 9 | (4) 1M x 9 | (1) 16M x 36 | NONE |
80MB | NONE | NONE | (1) 4M x 36 | (1) 16M x 36 |
80MB | (4) 4M x 9 | NONE | NONE | (1) 16M x 36 |
80MB | (4) 4M x 9 | (4) 16M x 9 | NONE | NONE |
96MB | (4) 16M x 9 | NONE | (1) 4M x 36 | (1) 4M x 36 |
96MB | (4) 4M x 9 | NONE | (1) 16M x 36 | (1) 4M x 36 |
96MB | (4) 4M x 9 | (4) 4M x 9 | (1) 16M x 36 | NONE |
128MB | NONE | NONE | (1) 16M x 36 | (1) 16M x 36 |
128MB | (4) 16M x 9 | NONE | NONE | (1) 16M x 36 |
128MB | (4) 16M x 9 | (4) 16M x 9 | NONE | NONE |
DRAM JUMPER CONFIGURATION | |||||||
Bank 0 | Bank 1 | Bank 2 | Bank 3 | JP18 | JP19 | JP20 | JP22 |
SIMM 1 - 4 | SIMM 5 - 8 | SIMM 9 | SIMM 10 | 1 & 2 | 1 & 2 | Open | 1 & 2 |
SIMM 1 - 4 | SIMM 5 - 8 | SIMM 9 | NONE | 1 & 2 | 1 & 2 | Open | 1 & 2 |
SIMM 1 - 4 | SIMM 9 | NONE | NONE | 1 & 2 | Open | Open | 1 & 2 |
SIMM 1 - 4 | SIMM 10 | SIMM 9 | NONE | 1 & 2 | Open | Open | 1 & 2 |
SIMM 9 | SIMM 10 | SIMM 1 - 4 | SIMM 5 - 8 | 2 & 3 | 2 & 3 | Open | 2 & 3 |
SIMM 9 | SIMM 10 | NONE | NONE | Open | Open | Closed | 2 & 3 |
SIMM 1 - 4 | SIMM 10 | SIMM 9 | NONE | 1 & 2 | Open | Open | 1 & 2 |
SIMM 9 | SIMM 10 | SIMM 1 - 4 | SIMM 5 - 8 | 2 & 3 | 2 & 3 | Open | 2 & 3 |
Note: Pins designated should be in the closed position. |
DRAM JUMPER CONFIGURATION (CON’T) | |||||||
Bank 0 | Bank 1 | Bank 2 | Bank 3 | JP23 | JP24 | JP50 | JP51 |
SIMM 1 - 4 | SIMM 5 - 8 | SIMM 9 | SIMM 10 | Open | 1 & 2 | Open | Open |
SIMM 1 - 4 | SIMM 5 - 8 | SIMM 9 | NONE | 1 & 2 | Open | Open | Open |
SIMM 1 - 4 | SIMM 9 | NONE | NONE | 2 & 3 | Open | Open | Open |
SIMM 1 - 4 | SIMM 10 | SIMM 9 | NONE | 1 & 2 | 2 & 3 | Open | Open |
SIMM 9 | SIMM 10 | SIMM 1 - 4 | SIMM 5 - 8 | Open | 2 & 3 | Closed | 2 & 3 |
SIMM 9 | SIMM 10 | NONE | NONE | 2 & 3 | Open | Open | 1 & 2 |
SIMM 1 - 4 | SIMM 10 | SIMM 9 | NONE | 1 & 2 | 2 & 3 | Open | Open |
SIMM 9 | SIMM 10 | SIMM 1 - 4 | SIMM 5 - 8 | Open | 2 & 3 | Open | Open |
Note: Pins designated should be in the closed position. |
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 |
512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP1 | JP2 | JP42 | JP44 |
128KB | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
256KB | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed |
512KB | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
CPU TYPE CONFIGURATION | |||||
Type | JP9 | JP12 | JP30 | JP31 | JP32 |
80486SX | 2 & 3 | 2 & 3 | 2 & 3 | Open | 2 & 3 |
SL80486SX | 2 & 3 | 2 & 3 | 2 & 3 | Open | 2 & 3 |
CX486M7 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
80486DX/DX2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
SL80486DX/DX2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
80486DX4 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
Note: Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION (CON’T) | |||||
Type | JP33 | JP34 | JP35 | JP36 | JP37 |
80486SX | Closed | Open | Open | Open | Open |
SL80486SX | Open | 4 & 5 | 3 & 4 | 2 & 3 | Open |
CX486M7 | Closed | 2 & 3 | 2 & 3 | 1 & 2, 3 & 4 | Open |
80486DX/DX2 | Closed | 4 & 5 | 3 & 4 | 2 & 3 | Open |
SL80486DX/DX2 | Closed | 4 & 5 | 3 & 4 | 2 & 3 | Open |
80486DX4 | Closed | 4 & 5 | 3 & 4 | 2 & 3 | Open |
Note: Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION (CON’T) | |||||
Type | JP38 | JP39 | JP43 | JP47 | JP48 |
80486SX | 1 & 2 | Open | 2 & 3 | 2 & 3 | 1 & 2 |
SL80486SX | Open | Open | 2 & 3 | 2 & 3 | 1 & 2 |
CX486M7 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 |
80486DX/DX2 | Open | Open | 2 & 3 | 2 & 3 | 1 & 2 |
SL80486DX/DX2 | Open | Open | 2 & 3 | 2 & 3 | 1 & 2 |
80486DX4 | Open | Open | 2 & 3 | 2 & 3 | 1 & 2 |
Note: Pins designated should be in the closed position. |
CPU SPEED CONFIGURATION (AVASEM AV9107 CLOCK GENERATOR) | ||||
Speed | JP10 | JP11 | JP26 | JP27 |
20MHz | Open | Open | Closed | Open |
25MHz | Open | Open | Open | Closed |
33MHz | Open | Open | Closed | Closed |
40MHz | Open | Open | Open | Open |
50iMHz | Open | Open | Open | Closed |
50MHz | Open | Open | Closed | Open |
66iMHz | Open | Open | Closed | Closed |
75iMHz | Open | pins 1 & 2 closed | Open | Closed |
80iMHz | Closed | Open | Closed | Closed |
100iMHz | Open | pins 1 & 2 closed | Closed | Closed |
CPU SPEED CONFIGURATION (AVASEM AV9107 CLOCK GENERATOR, CON’T) | |||
Speed | JP28 | JP29 | JP40 |
20MHz | Closed | Closed | Open |
25MHz | Closed | Closed | Open |
33MHz | Closed | Open | Open |
40MHz | Closed | Closed | Open |
50iMHz | Closed | Closed | Open |
50MHz | Closed | Open | Open |
66iMHz | Closed | Open | Open |
75iMHz | Open | Closed | pins 2 & 3 closed |
80iMHz | Open | Open | pins 2 & 3 closed |
100iMHz | Open | Open | pins 1 & 2 closed |
CPU SPEED CONFIGURATION (MXIC MX8315 CLOCK GENERATOR) | ||||
Speed | JP10 | JP11 | JP26 | JP27 |
20MHz | Open | Open | Open | Open |
25MHz | Open | Open | Open | Closed |
33MHz | Open | Open | Closed | Closed |
40MHz | Open | Open | Closed | Closed |
50iMHz | Open | Open | Open | Closed |
50MHz | Open | Open | Closed | Open |
66iMHz | Open | Open | Closed | Closed |
75iMHz | Open | pins 1 & 2 closed | Open | Closed |
80iMHz | Closed | Open | Closed | Closed |
100iMHz | Open | pins 1 & 2 closed | Closed | Closed |
CPU SPEED CONFIGURATION (MXIC MX8315 CLOCK GENERATOR, CON’T) | |||
Speed | JP28 | JP29 | JP40 |
20MHz | Closed | Open | Open |
25MHz | Closed | Open | Open |
33MHz | Closed | Closed | Open |
40MHz | Closed | Open | Open |
50iMHz | Closed | Open | Open |
50MHz | Closed | Open | Open |
66iMHz | Closed | Closed | Open |
75iMHz | Open | Closed | pins 2 & 3 closed |
80iMHz | Open | Closed | pins 2 & 3 closed |
100iMHz | Open | Closed | pins 1 & 2 closed |
BUS SPEED CONFIGURATION | |
CPU speed | JP7 |
<= 33MHz | pins 1 & 2 closed |
> 33MHz | pins 2 & 3 closed |