lee@sed170.HAC.COM (John Lee ) (12/24/88)
I have an application that must send a pulse to mouse port 2 and must be
synched to the VBLANK interrupt, but must occur a fixed time after the
interrupt. I have several options, including using the copper to actually do
the output via the user copper list, but I wonder what would happen if the
screen is dragged down or subtended (put behind other screens.) This code
must be multitasking/OS/Intuition/Workbench friendly.
The idea I have would be to:
1) Establish a VBLANK interrupt handler. This would start the timer
on each VBLANK.
2) Establish a timer interrupt handler. This would send the pulse
to mouse port 2.
Creating and establishing the two handlers are easy. So, what's my problem?
I need to know which timer is free to allocate for my use and if there is a
better way to go about it. I just read the article by Robert "Kodiak" Burns
in reply to a different question which said that the two timers in CIAB are
free, but I wish to confirm this (I also seem to recall that that only one
timer generates a hardware interrupt.)
I'd appreciate any help, questions, critiques, and donations. Thank you!
John Lee
-------------------------------------------------------------------------------
Raining CATS and DOGS? Join the RATS: Remote Amiga Teleconferencing System
+--------+ John Lee
| HUGHES |
+--------+ ARPAnet: jhlee@hac2arpa.hac.com
Hughes Aircraft Company
The above opinions are those of the user and not of those of this machine.me128-aw@kepler.Berkeley.EDU (me128 student) (01/02/89)
In article <272@sed170.HAC.COM> lee@sed170.UUCP (John Lee (ird)) writes: > [Substance removed] > >I'd appreciate any help, questions, critiques, and donations. Thank you! ^^^^^^^^^ Yeah, right. > > John Lee -Vince Lee (Yeah, we're related)