Peter,

Thanks for the clarification.

Sean

At 08:07 PM 5/18/99 -0400, you wrote:
>The dos print spooler polls the parallel port on the timer interrupt, no
>interrupt from the printer is needed
>
>-timer interrupt jumps to hooked service routine (about 18 times a second)
>-printer status check
>-if printer buffer empty send new characters
>-if printing done unhook timer interrupt
>-jump to original timer service routine
>-original timer service routine returns controll to dos till next timer
>interrupt
>
>Peter pvh@vertonet.com
>

|
| Sean Breheny
| Amateur Radio Callsign: KA3YXM
| Electrical Engineering Student
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