INT 14 - Digiboard - CCB COMMAND - IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. POLLING TIMER TO HOST AX = 164Eh BL = ticks BH = ??? CL = mode DX = port number (00h-03h) (04h-43h for XAPCM232.SYS) Return: AH = status 00h successful 80h error FFh error SeeAlso: AH=16h"Digiboard",AX=164Dh