madar chodon maan k laudion results out kar nahin to tumhari bahiniya chhod dunga
[#0]
IRQ 3.
IRQ 3
com1,com2 com3
COM2 and COM4 use the same interrupt by default (IRQ3). The same is also true for COM1 and COM3 (IRQ4).
COM1-IRQ 4, memory addresses 03F8-03FF COM2-IRQ 3, memory addresses 02F8-02FF COM3-IRQ 4, memory addresses 03E8-03EF COM4-IRQ 3, memory addresses 02E8-02EF pg. 396
MODE LPTx=COMx Unfortunately MODE LPTx:=COMx redirects parallel printer output to a COMport, I've never seen any indication that it will work the other way. For example, to accommodate a 1200 baud serial printer on COM2 to a program that only has LPT1 output: MODE COM2:1200,n,8,1,p sets up the comport with continuous retry MODE LPT1:=COM2 redirects LPT1 output to COM2
com2
COM1 and COM2 originally referred to the serial port interfaces on a PC. Now they can refer to any port, virtual or physical.
The "com" ports are computer, serical communications ports (normally RS-232).
Usually it'd be COM2. The IO address range is usually 0x2F8 - 0x2FF.
well COM1, COM2, COM3, and COM4 are sometimes configured as Serial Ports.