About Int 8 h and in1ch (a very incisive explanation)

During system power-on initialization, an interrupt request is sent every about 55 ms at the beginning of the system timer. After the CPU responds to the timer interrupt request, it is transferred to the 8 h for interruption processing. ProgramThere is an interrupt instruction int1ch in the 8 h Interrupt Processing Program provided by BIOS, so it is required to call about 18.2 1 Ch interrupt processing programs every second, the BIOS's 1ch interrupt handler does not actually do any work, and only one interrupt return command.
Original: http://topic.csdn.net/u/20090529/09/eb41c0fa-41f4-4a76-bdf1-ca2a44c8f758.html