386/486 MARK III CONVERTIBLE Motherboard Settings and Configuration
AMERICAN MEGATRENDS, INC.
386/486 MARK III CONVERTIBLE
Processor | 80386DX (80486DX on MARK III adapter) |
Processor Speed | 25/33MHz |
Chip Set | AMI |
Max. Onboard DRAM | 32MB |
Cache | 64KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit external memory card slot, CPU/NPU expansion card slot |
NPU Options | 80387 (3167/4167 on MARK III adapter) |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J1 | Turbo switch | J8 |
Turbo LED | J5 | Reset switch | J14 |
Speaker | J6 | 32-bit external memory card | P10 |
Power LED & keylock | J7 | CPU/NPU expansion card | P13 |
USER CONFIGURABLE SETTINGS | ||||
Function | Jumper/Switch | Position | ||
DRAM address sequence select bank 0, then bank 1 | J3 | pins 1 & 2, 3 & 4 closed | ||
DRAM address sequence select bank 1, then bank 0 | J3 | pins 2 & 3, 4 & 5 closed | ||
| » | CMOS memory normal operation | J4 | Open | |
CMOS memory clear | J4 | Closed | ||
| » | Factory configured - do not alter | SW1/switch 1 | Off | |
Monitor type select color | SW1/switch 2 | On | ||
Monitor type select monochrome | SW1/switch 2 | Off | ||
Note : Cache is factory installed and is not configurable. The size of the cache & tag are unidentified. | ||||
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
1MB | (4) 256K x 9 | NONE |
2MB | (4) 256K x 9 | (4) 256K x 9 |
4MB | (4) 1M x 9 | NONE |
5MB | (4) 256K x 9 | (4) 1M x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
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