486MI REV. 1.11 Motherboard Settings and Configuration
ADVANCED INTEGRATION RESEARCH, INC.
486MI REV. 1.11
Processor | 80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
Processor Speed | 20/25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | SIS |
Max. Onboard DRAM | 64MB |
Cache | 64/128/256/512KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit VESA local bus slots (3), floppy drive interface, game port, IDE interface, parallel port, serial ports (2) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
IDE port | CN1 | Green PC LED | J3 |
Floppy port | CN2 | Reset switch | J4 |
Parallel port | CN3 | Turbo switch | J5 |
Game port | CN4 | Turbo LED | J6 |
Serial port 1 | CN5 | IDE interface LED | J7 |
Serial port 2 | CN6 | 32-bit VESA Local bus slots | S1, S2 & S3 |
Speaker | J1 | Green PC connector | W1 |
Power LED & keylock | J2 |
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USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Factory configured - do not alter | JP3 | N/A |
» | Factory configured - do not alter | JP4 | N/A |
» | Factory configured - do not alter | JP9 | N/A |
» | Monitor type select monochrome, VGA or EGA | JP16 | Open |
| Monitor type select CGA | JP16 | Closed |
» | Flash BIOS write protect enabled | JP17 | pins 1 & 2 closed |
| Flash BIOS write protect disabled | JP17 | pins 2 & 3 closed |
» | CMOS memory normal operation | JP20 | pins 1 & 2 closed |
| CMOS memory clear | JP20 | pins 2 & 3 closed |
» | IDE interface enabled | JP29 | pins 1 & 2 closed |
| IDE interface disabled | JP29 | pins 2 & 3 closed |
» | Parallel port select interrupt IRQ7 | JP30 | pins 1 & 2 closed |
| Parallel port select interrupt IRQ5 | JP30 | pins 2 & 3 closed |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
2MB | (1) 512K x 36 | None | None | None |
4MB | (1) 512K x 36 | None | (1) 512K x 36 | None |
4MB | (1) 1M x 36 | None | None | None |
6MB | (1) 512K x 36 | None | (1) 1M x 36 | None |
8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
8MB | (1) 2M x 36 | None | None | None |
10MB | (1) 512K x 36 | None | (1) 1M x 36 | (1) 1M x 36 |
10MB | (1) 512K x 36 | None | (1) 2M x 36 | None |
12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 | None |
12MB | (1) 2M x 36 | None | (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 | None | (1) 1M x 36 | (1) 1M x 36 |
16MB | (1) 2M x 36 | None | (1) 2M x 36 | None |
16MB | (1) 4M x 36 | None | None | None |
20MB | (1) 1M x 36 | (1) 4M x 36 | None | None |
24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 | None |
24MB | (1) 2M x 36 | None | (1) 4M x 36 | None |
32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
32MB | (1) 8M x 36 | None | None | None |
36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 | None |
40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 |
40MB | (1) 2M x 36 | None | (1) 4M x 36 | (1) 4M x 36 |
40MB | (1) 2M x 36 | None | (1) 8M x 36 | None |
48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 | None |
48MB | (1) 8M x 36 | None | (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 | None | (1) 4M x 36 | (1) 4M x 36 |
64MB | (1) 8M x 36 | None | (1) 8M x 36 | None |
CACHE JUMPER CONFIGURATION | ||||||
Size | JP10 | JP11 | JP12 | JP13 | JP14 | JP15 |
64KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
128KB | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
256KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
256KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
Note:Pins designated should be in the closed position. | ||||||
CACHE SIZE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
128KB | (4) 32K x 8 | NONE | (1) 32K 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 |
CPU TYPE CONFIGURATION | ||
Type | JP1 | JP2 |
80486SX | Open | pins 2 & 3 closed |
80486DX | pins 1 & 2 closed | pins 1 & 2 and 3 & 4 closed |
80487SX | pins 2 & 3 closed | pins 1 & 2 and 3 & 4 closed |
ODP486SX | pins 2 & 3 closed | pins 1 & 2 and 3 & 4 closed |
80486DX2 | pins 1 & 2 closed | pins 1 & 2 and 3 & 4 closed |
CPU SPEED CONFIGURATION | ||||||
Speed | JP5 | JP6 | JP7 | JP26 | JP27 | JP28 |
20MHz | Closed | Open | Open | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
25MHz | Open | Closed | Closed | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
33MHz | Open | Closed | Open | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
40MHz | Open | Open | Closed | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
50i MHz | Open | Closed | Closed | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
50MHz | Open | Open | Open | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
66i MHz | Open | Closed | Open | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
Note:Pins designated should be in the closed position. | ||||||
IDE RECOVERY TIME | ||||
Speed | Recovery Time | JP22 | JP23 | JP24 |
<33mhz | 9T, low speed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
<33mhz | 7T, middle speed | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
<33mhz | 5T, high speed | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
>40mhz | 13T, low speed | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed |
>40mhz | 11T middle speed | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
>40mhz | 9T high speed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION | |||
Speed | Setting | ID2 | ID3 |
<=33MHz | 0 wait states | pins 1 & 2 closed | pins 1 & 2 closed |
>33MHz | 1 wait state | pins 2 & 3 closed | pins 2 & 3 closed |
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