Ways to crash your computer -- Part 3
Configure a timer other than Counter 2
- Counters 1 and 0 are used for the DOS clock and to control the dynamic RAM refresh rate
- If you set the refresh rate too low, memory forgets
Change all the bits in the 8255’s Port B
- Bit 0 of Port B controls gate 2
- What do the other bits control? Who knows?
- Use AND and OR with masks to change only the bit you’re interested in