Hmmm... you're web address doesn't seem complete. And I call $285 TIMINT
too. Probably because z26 calls it that in a trace log. And you know what
that means... ;-)
John
Chris Wilkson wrote:
> The following is taken from the memory maps I created. The full maps can
> be found at http://web/ecwilkso/www/VCS_hardware
>
> $0284 = (RIOT $06) - INTIM (read), edge detect control (write)
> $0285 = (RIOT $05) - read interrupt flag (read), edge detect control
(write)
>
>
> PA7 of the RIOT can be used to generate an interrupt. Unfortunately, the
> 6507 has no interrupt inputs. So the /INT pin of the RIOT is left
unconnected.
> But an internal flag is still generated and can be read and cleared
normally.
> I haven't thought of a specific use for it yet, but I'm sure *someone*
would
> like to know that player 0 moved the joystick to the right (or stopped) or
> pressed the paddle 0 button (or stopped) since the last check.
>
> Maybe we can call address $285 "INTFLG"?
>
> -Chris
>
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