Older parallel printers don't use IRQs . . .

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Post #102,327

by Andrew Grygus

5/16/03 7:35:13 PM

Older parallel printers don't use IRQs . . .

. . (Standard Parallel Port setting on newer machines) and they can be turned off, or all parallel ports set to IRQ-7 if the IRQ can't be turned off. The driver uses polling to check the printer. Recent enhanced parallel port schemes may actually use an IRQ, I don't know.

IRQs used to be very scarce and we were always out of them, but it's not so bad since the PCI bus came along as it can share IRQs among several peripherals and USB has replaced serial ports for many peripherals.

[link|http://www.aaxnet.com|AAx]

Describing the innards of Nikolai :) (For anyone interested) - (Nightowl) - (26) - May 15, 2003, 02:23:33 AM EDT

One question. - (pwhysall) - (4) - May 15, 2003, 07:38:04 AM EDT

Got a recommendation for a graphics card? - (hnick) - (2) - May 15, 2003, 07:59:07 AM EDT

Depends what you want. - (pwhysall) - (1) - May 15, 2003, 08:04:04 AM EDT

Sound good. - (hnick) - May 15, 2003, 09:37:33 AM EDT

Re: One question. - (Nightowl) - May 15, 2003, 12:08:49 PM EDT

Another question - (pwhysall) - (20) - May 15, 2003, 08:06:03 AM EDT

What about... - (folkert) - (2) - May 15, 2003, 08:23:58 AM EDT

Agreed. - (pwhysall) - May 15, 2003, 08:27:45 AM EDT

Re: What about... - (Nightowl) - May 15, 2003, 12:16:43 PM EDT

Re: Another question - (deSitter) - (5) - May 15, 2003, 09:49:27 AM EDT

Well, I see quite the opposite. - (folkert) - (2) - May 15, 2003, 10:57:31 AM EDT

Re: Well, I see quite the opposite. - (Nightowl) - May 15, 2003, 12:22:27 PM EDT

Re: Well, I see quite the opposite. - (deSitter) - May 15, 2003, 12:29:23 PM EDT

I agree with you on this, for both mouse and keyboard - (jake123) - (1) - May 15, 2003, 11:18:43 AM EDT

I differ. - (pwhysall) - May 15, 2003, 11:20:03 AM EDT

Re: Another question - (Nightowl) - (10) - May 15, 2003, 12:12:53 PM EDT

USB Printers - (orion) - (9) - May 15, 2003, 02:32:52 PM EDT

Re: USB Printers - (Nightowl) - (8) - May 15, 2003, 08:38:59 PM EDT

Re: USB Printers - (orion) - (7) - May 15, 2003, 11:15:18 PM EDT

Re: USB Printers - (Nightowl) - (6) - May 16, 2003, 12:37:49 AM EDT

The primary concern with parallel - (Steven A S) - (5) - May 16, 2003, 05:07:51 PM EDT

Re: The primary concern with parallel - (Nightowl) - (4) - May 16, 2003, 06:29:01 PM EDT

Older parallel printers don't use IRQs . . . - (Andrew Grygus) - May 16, 2003, 07:35:13 PM EDT

IRQs - (Steven A S) - (2) - May 16, 2003, 10:03:46 PM EDT

Re: IRQs - (Nightowl) - (1) - May 17, 2003, 01:51:07 AM EDT

Re: IRQs - (Nightowl) - May 17, 2003, 01:12:08 PM EDT

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