I remember dumping registers to text-mode screen memory so that I wouldn't waste a register. Half of the result landed in the color values, so sometimes I could

I remember dumping registers to text-mode screen memory so that I wouldn't waste a register. Half of the result landed in the color values, so sometimes I couldn't read all of the value because it was flashing green on green. I prefered Bochs' Port E9 hack. Oh, OS courses at the university... good old time. (Some participants complained that going from zero to bare-metal x86 was too difficult.)