I’m trying to access individual pins on a parallel port
I use outb(1, 0x3BC) to turn on data pin 1 on my parallel port and outb(~1, 0x3BC) to turn off data pin 1. However, if I do outb(2, 0x3BC), data pin 2 turns on fine. But when I do outb(~2, 0x3BC) nothing happens. I can’t turn off any data pin except for pin 1. Why is that?