486A-33 Motherboard Settings and Configuration
MICROWISE, INC.
486A-33
Processor | 80486SX/80487SX/80486DX |
Processor Speed | 20/25/33/50MHz |
Chip Set | SIS |
Max. Onboard DRAM | 32MB |
Cache | 32/64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit external memory card slot |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | CN1 | Reset switch | JP1 |
Speaker | CN2 | Turbo switch | JP3 |
External battery | CN3 | Turbo LED | JP5 |
32-bit external memory card | J1 | ||
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
| » | CMOS memory normal operation | JP2 | pins 1 & 2 closed |
CMOS memory clear | JP2 | pins 2 & 3 closed | |
| » | Factory configured - do not alter | JP4 | N/A |
| » | Monitor type select color | JP15 | Closed |
Monitor type select monochrome | JP15 | Open | |
| » | Factory configured - do not alter | JP19 | N/A |
| » | Factory configured - do not alter | JP20 | N/A |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
1MB | (4) 256K x 9 | NONE | NONE | NONE |
2MB | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE |
4MB | (4) 1M x 9 | NONE | NONE | NONE |
6MB | (4) 256K x 9 | (4) 256K x 9 | (4) 1M x 9 | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
10MB | (4) 256K x 9 | (4) 256K x 9 | (4) 1M x 9 | (4) 1M x 9 |
12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE | NONE | NONE |
18MB | (4) 256K x 9 | (4) 256K x 9 | (4) 4M x 9 | NONE |
20MB | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE |
24MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | NONE |
32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
36MB | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
40MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 |
48MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
Note:Banks 2 & 3 are used when a 32-bit external memory card is installed at J1. | ||||
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
32KB | (4) 8K x 8 | NONE | (3) 16K x 4 |
64KB | (4) 8K x 8 | (4) 8K x 8 | (3) 16K x 4 |
128KB | (4) 32K x 8 | NONE | (3) 16K x 4 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (3) 16K x 4 |
CACHE JUMPER CONFIGURATION | |||||||||
Size | JP9 | JP10 | JP11 | JP12 | JP13 | JP14 | JP16 | JP17 | JP18 |
32KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
64KB | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 |
128KB | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
Note:Pins designated should be in the closed position. | |||||||||
CPU TYPE CONFIGURATION | |||
Type | JP6 | JP7 | JP8 |
80486SX | Open | Open | pins 2 & 3 closed |
80487SX | Closed | pins 2 & 3 closed | pins 1 & 2 closed |
80486DX | Closed | pins 1 & 2 closed | pins 1 & 2 closed |
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