![](/images/new-backgrounds/1195573/195573127x1.webp)
Appendix A System Settings and Pin Assignments
A.1 System I/O Address and Interrupt Assignments
Table A.1: UNO-3074 System I/O Port
Address Range | Device |
|
|
DMA controller (slave) | |
|
|
Interrupt controller 1 (master) | |
|
|
8254 timer/counter | |
|
|
8042 (keyboard controller) | |
|
|
|
|
DMA page register | |
|
|
Interrupt controller 2 (slave) | |
|
|
DMA controller (master) | |
|
|
0F0 | Clear math |
|
|
0F1 | Reset math |
|
|
Math | |
|
|
1D0 | Vector address; for COM port share IRQ |
|
|
1E0 | Reserved |
|
|
11E | Reserved |
|
|
1st fixed disk | |
|
|
DI/O and counter | |
|
|
Reserved | |
|
|
Serial port 4 | |
|
|
Serial port 2 | |
|
|
Ethernet | |
|
|
LPT2 | |
|
|
Parallel printer port 1 (LPT1) | |
|
|
SDLC, bisynchronous 2 | |
|
|
Bisynchronous 1 | |
|
|
Monochrome display | |
|
|
Reserved | |
|
|
54 |