From: Ullrich von Bassewitz (uz_at_musoftware.de)
Date: 2003-08-23 21:36:51
On Sat, Aug 23, 2003 at 09:04:23PM +0200, Rainer Buchty wrote:
> Well, then after releasing the CIA NMI the ACIA IRQ status has to be
> checked to see if something did happen meanwhile and then jump to a
> "userland" copy if the NMI handler? If I understood your first mail
> correctly, all you wanted to prevent is the occurance of an ACIA NMI
> during access of the ACIA control register happening outside the NMI
> routine.
Yes, I think that would be possible. It is ugly but at least it's a
solution:-)
Regarding my question concerning the cycles used by the C64 ROM IRQ handler:
Is it possible to use VICE somehow to measure the time spent in this code?
Regards
Uz
--
Ullrich von Bassewitz uz@musoftware.de
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.