Bryan Posted February 10, 2017 Share Posted February 10, 2017 Does anyone know what the XL/XE OS does when it sees an Antic Reset? This feature was removed after the 400/800 presumably because it didn't work if the CPU had HCF'ed. I can go trace the NMI handler but I thought I'd see if anyone here knew off the top of their head. I'm hoping it still causes a reset and isn't treated as a video event. Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted February 10, 2017 Share Posted February 10, 2017 The reset bit (bit 5) in NMIST is ignored by the XL/XE OS. The NMI handler does a BIT NMIST and a BPL straight to the VBL handler. 1 Quote Link to comment Share on other sites More sharing options...
Bryan Posted February 10, 2017 Author Share Posted February 10, 2017 Thanks! So basically Antic now has a VBL trigger pin. It could be used to trigger something like a monitor, I guess. I'm thinking of modifying an OS ROM to make it a coldstart input... hmmm... Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.