ROBOTECH, INC.
GMB-486UN
|
Processor |
80486SX/80486DX/80486DX2 |
|
Processor Speed |
25/33/50/66MHz |
|
Chip Set |
UMC |
|
Max. onboard DRAM |
32MB |
|
Cache |
32/64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
CN1 |
Reset switch |
CN6 |
|
Turbo LED |
CN4 |
Speaker |
CN7 |
|
Turbo switch |
CN5 |
Power LED & keylock |
CN8 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Switch |
Setting | |
| » |
CMOS memory normal operation |
JP2 |
1 & 2 closed |
|
CMOS memory clear |
JP2 |
2 & 3 closed | |
| » |
Hardware Emulate KBGA20 |
JP10 |
1 & 2 closed |
|
Keyboard controller 8042 |
JP10 |
2 & 3 closed | |
| » |
Monitor type select color |
JP12 |
Closed |
|
Monitor type select monochrome |
JP12 |
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) 1M x 9 |
(4) 1M x 9 |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
EPROM TYPE CONFIGURATION | ||||
|
CPU |
JP3 |
JP7 |
JP9 |
JP13 |
|
80486SX-25 |
2 & 3 |
Open |
2 & 3 |
2 & 3 |
|
80486DX-33 |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
1 & 2 |
|
80486DX-50 |
2 & 3 |
1 & 2 |
1 & 2, 3 & 4 |
1 & 2 |
|
80486DX2-50 |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
1 & 2 |
|
80486DX2-66 |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | ||||
|
CACHE TYPE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
32KB |
(4) 8K x 8 |
NONE |
(1) 8K x 8 |
|
64KB |
(4) 8K x 8 |
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 SIZE CONFIGURATION | ||||
|
Size |
JP22 |
JP23 |
JP25 |
JP26 |
|
32KB |
2 & 3 |
Open |
2 & 3 |
2 & 3 |
|
64KB |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
1 & 2 |
|
128KB |
2 & 3 |
1 & 2 |
1 & 2, 3 & 4 |
1 & 2 |
|
256KB |
1 & 2 |
1 & 2 |
1 & 2, 3 & 4 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | ||||
|
CACHE SIZE CONFIGURATION (CON’T) | ||
|
Size |
JP27 |
JP28 |
|
32KB |
1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 |
Open |
|
64KB |
Open |
1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 |
|
128KB |
Open |
Open |
|
256KB |
Open |
Open |
|
Note: Pins designated should be in the closed position. | ||
|
CACHE SIZE CONFIGURATION (CON’T) | ||
|
Size |
JP29 |
JP30 |
|
32KB |
Open |
Open |
|
64KB |
Open |
Open |
|
128KB |
1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 |
Open |
|
256KB |
Open |
1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 |
|
Note: Pins designated should be in the closed position. | ||