![](/images/new-backgrounds/1180244/180244113x1.webp)
B-3. TIMER & DMA CHANNELS MAP
Timer Channel Map :
| Timer Channel | Assignment |
| 0 | System timer interrupt |
| 1 | DRAM Refresh request |
| 2 | Speaker tone generator |
DMA Channel Map : |
| |
|
|
|
| DMA Channel | Assignment |
| 0 | Available |
| 1 | IBM SDLC |
| 2 | Floppy Disk adapter |
| 3 | |
| 4 | Cascade for DMA controller 1 |
| 5 | Available |
| 6 | Available |
| 7 | Available |
~ Page 51 ~