Dead Hackers Society
Other BBSes »
 
 

68k Inside

Sommarhack 2024

Silly Venture 2024 SE
Demoscene  Coding  CT60  Buy/sell

Atari coding BBS
 
Re: Polling V/H retrace status
Posted by: Patrice Mandin Jul,01.2014-21:39 

I don't think you can read the status. If I am correct, at the hardware level, the video chip is directly wired to IPL 2 (HBL) and 4 (VBL) of the m68k cpu, to trigger interrupts whenever they happen. There are no intermediary registers.







[All messages in this thread]    [Start new thread]

Topic Posted by  Date 
Polling V/H retrace status PeP Jul,01.2014-07:54
  Re: Polling V/H retrace status ggn Jul,01.2014-08:11
  Re: Polling V/H retrace status Patrice Mandin Jul,01.2014-21:39
    Re: Polling V/H retrace status PeP Jul,02.2014-12:36
      Re: Polling V/H retrace status Patrice Mandin Jul,02.2014-21:33
        Re: Polling V/H retrace status PeP Jul,03.2014-09:00
  Re: Polling V/H retrace status Alien/ST-CNX Jul,02.2014-07:34
    Re: Polling V/H retrace status PeP Jul,02.2014-12:37


Reply to this message
Name:
Topic:
Anti-troll code:

Message:

What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
© 1994-2024 Dead Hackers Society Contact: Anders Eriksson