GMB-386UN Motherboard Settings and Configuration
ROBOTECH, INC.
GMB-386UN
Processor | 80386DX |
Processor Speed | 33/40MHz |
Chip Set | UMC |
Max. Onboard DRAM | 32MB |
Cache | 32/64/128/256KB |
BIOS | AMI |
Dimensions | 254mm x 220mm |
I/O Options | None |
NPU Options | 80387DX/3167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP1 | Speaker | JP18 |
Turbo LED | JP16 | Reset switch | JP19 |
Turbo switch | JP17 | Power LED & keylock | JP20 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS memory normal operation | JP2 | pins 1 & 2 closed |
CMOS memory clear | JP2 | pins 2 & 3 closed | |
» | Monitor type select color | JP3 | Closed |
Monitor type select monochrome | JP3 | Open | |
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) 256K x 9 | (4) 1M x 9 |
20MB | (4) 1M x 9 | (4) 256K x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
32KB | (4) 8K x 8 | NONE | (1) 8K x 8 |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION (WRITE BACK) | ||||||||
Size | JP8 | JP9 | JP10 | JP11 | JP12 | JP13 | JP14 | JP15 |
32KB | 2 & 3 | Open | 2 & 3 | 1 & 2 | 2 & 3 | Open | 2 & 3 | Open |
64KB | 1 & 2 | Closed | 2 & 3 | 2 & 3 | 1 & 2 | Open | 2 & 3 | Open |
128KB | 1 & 2, 3 & 4 | Closed | 1 & 2 | 2 & 3 | 2 & 3 | Closed | 2 & 3 | Open |
256KB | 1 & 2, 4 & 5 | Closed | 2 & 3 | 2 & 3 | 2 & 3 | Closed | 1 & 2 | Closed |
Note: Pins designated should be in the closed position. | ||||||||
CACHE JUMPER CONFIGURATION (WRITE THROUGH) | ||||||||
Size | JP8 | JP9 | JP10 | JP11 | JP12 | JP13 | JP14 | JP15 |
32KB | 2 & 3 | Open | 2 & 3 | 2 & 3 | 2 & 3 | Open | 2 & 3 | Open |
64KB | 1 & 2 | Closed | 2 & 3 | 2 & 3 | 2 & 3 | Open | 2 & 3 | Open |
128KB | 1 & 2, 3 & 4 | Closed | 2 & 3 | 2 & 3 | 2 & 3 | Closed | 2 & 3 | Open |
256KB | 1 & 2, 4 & 5 | Closed | 2 & 3 | 2 & 3 | 2 & 3 | Closed | 2 & 3 | Closed |
Note: Pins designated should be in the closed position. | ||||||||
CPU SPEED CONFIGURATION | ||
Speed | JP7 | JP21 |
33MHz | pins 1 & 2 closed | pins 1 & 2 closed |
40MHz | pins 2 & 3 closed | pins 1 & 2 closed |
MATH COPROCESSOR WAIT STATE CONFIGURATION | |
Wait states | JP5 |
0 wait states | Closed |
1 wait state | Open |
A20 GATE CONFIGURATION | |
Setting | JP4 |
Hardware emulate | Open |
8042 keyboard controller | pins 1 & 2 closed |
Cyrix CPU emulate | pins 2 & 4 closed |
Keyboard controller controls Cyrix CPU | pins 3 & 4 closed |
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