DXA System board (A1)
Security configuration
|
JP2 |
| Enabled |
1-2 |
| Disabled |
2-3 |
BIOS configuration
|
JP4 |
| Flash ROM |
1-2 |
| EPROM |
2-3 |
Processor clock selection
|
JP7 |
JP8 |
JP9 |
JP10 |
JP17 |
| 25 Mhz (DX2-50) |
2-3 |
2-3 |
1-2 |
2-3 |
2-3 |
| 33 Mhz (DX2-66) |
1-2 |
2-3 |
1-2 |
2-3 |
2-3 |
| 40 Mhz |
1-2 |
1-2 |
2-3 |
1-2 |
1-2 |
| 50 Mhz |
2-3 |
2-3 |
1-2 |
1-2 |
1-2 |
CPU selection
|
JP11 |
JP12 |
JP13 |
JP15 |
JP18 |
JP20 |
JP27 |
| 486 |
1-2 |
1-2 |
1-2 |
1-2 |
2-3 |
2-3 |
OFF |
| P24T |
1-2 |
2-3 |
1-2 |
2-3 |
1-2 |
2-3 |
OFF |
On-board VGA configuration
|
JP14 |
| Enabled |
1-2 |
| Disabled |
2-3 |
Cache configuration
|
BK1 |
BK2 |
Tag |
JP24 |
JP25 |
JP26 |
| 64K |
8Kx8 |
8Kx8 |
8Kx8 |
OFF |
OFF |
2-3 |
| 128K |
32Kx8
| -- |
8Kx8 |
OFF |
ON |
1-2 |
| 256K |
32Kx8 |
32Kx8 |
32Kx8 |
ON |
ON |
2-3 |