Please help to understand!
Beside me AT89C2051 worked worked but then something happened to port P1 (the comparer does not work, on line of the port logical 1 - neat to 5v).
I use whole 2 lines of the port and comparer. Could Not be broken whole port wholly, more so comparer? Beside me question if on microcontroller of no voltage of the feeding, but on lines of the port is given some not very big voltage, can this his(its) break.
The Port P3 works correct.
Excuse me for my bad english, hope you understood me.