piclist 1999\05\19\021011a >
Thread: Multitasking without interrupt ?
face BY : Dr. Imre Bartfai email (remove spam text)

Hi Sean, I do not know how did it work and whether it did work. PRINT
definitely runs on IT basis (the ACK causes the printer IT).
Unfortunately, the printer IRQ-s (IRQ7 for LPT1 and IRQ5 for LPT2) are
often misused for another things (e. g. some sound cards defaults IRQ7
also) causing funny things when you try to print with PRINT. Such way, the
IRQ seems to be the bottleneck on the PC from my point of view. Of course,
there are also a few printers with serial interface, or you can install a
multitasking environment, and one task prints a normal way (i. e. with
time slicing).  But it is not the printer spooler for the DOS.  I hope
this helped.

On Tue, 18 May 1999, Sean Breheny wrote:

{Quote hidden}


In reply to: <>
See also: www.piclist.com/techref/microchip/ints.htm?key=interrupt
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