Well, heres my 3 cents worth on LPTCOM port addresses and IRQs: The +quot;standard+quot; a Well, heres my 3 cents worth on LPTCOM port addresses and IRQs: The +quot;standard+quot; a Well, here's my 3 cents worth on LPT/COM port addresses and IRQ's: The 'standard' addresses for the LPT and COm ports are: COM1 3F8 IRQ4 COM2 2F8 IRQ3 COM3 2E8 IRQ4 COM4 2E0 IRQ3 LPT1 3BC IRQ7 LPT2 378 IRQ7 LPT3 278 IRQ5 However. I have also seen LPT2 use IRQ5 and LPT3 use IRQ7 Ignou Bca Project Synopsis Template. !!! COM3 and COM4 addresses are not really that 'standard', and COM4 especially may vary depending on your board. I believe that the using IRQ7 for all LPT ports in a system works fine, LPT ports seem to share IRQ's just fine. Chainfire 3d Apk Free Download For Android. This is not nearly as true for COM ports, although in most cases the pairs COM1/3 {IRQ4) and COM2/4 (IRQ3) work fine. Some COM boards/modems are just not happy sharing an IRQ with another COM port/modem!!

If you have trouble with a COm port in a machine with more than two ports, try disabling/removing the other member of the pair and see if the problem goes away. I have also seen some software that is hardcoded to expect the above address/IRQ 'standard' settings, even though most CO{ boards allow you to m{x and match (say COM2 using IRQ 2,4 or 5)!! Unless you are setup for non-standard IRQ #'s to avoid some other IRQ conflict, it's best to stick to the 'standards'. For an explaination of when COM1 isn't COM1 see the message I will post titled COM/LPT ports and their addresses. It explains how the BIOS determines how to assign the COM1/2/3/4 & LPT1/2/3 device names to a hardware port at a particular address.

I/O address, Title, IRQ, Description. (3F8), COM1, IRQ4, The first serial communications port on the PC. (2F8), COM2, IRQ3, The second serial communications port on the PC. Cable is plugged into a serial port that has. The standard addresses for COM1 and COM2 are 3F8 and 2F8. To the serial ports when more than two serial devices.

------ One of the most confusing things about how PC hardware is configured has to do with the way the BIOS assigns device names (COM1, COM2, etc) to a hardware port. Most users think that by addressing their serial board at address 2F8, that they have set that port up as COM2. This is not always true!!! If this poor user didn't have a serial port at address 3F8 (COM1's 'standard' address), then their port at 2F8 will be given the device name COM1!!!!!!