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Old 16 June 2013, 07:26   #15
mc6809e
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Join Date: Jan 2012
Location: USA
Posts: 318
Quote:
Originally Posted by Photon View Post
An interrupt that starts with a busy-wait for the intended HPOS can be predictably triggered for a minimum busy-wait on 68000. Should you have a fast CPU you waste part of a scanline busy-waiting, but on the other hand if the game runs on A500 the CPU can waste that time and still be able to run the game. A good method to know when you are A500-centric (write for the A500 platform specifically) but don't want to rule out faster Amigas.
Great idea. And the initial MOVEM.L M->R can be done inside the handler, too, followed by the wait.

Thanks!
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