Re: Ok, anyone started Contiki 4 AII yet?

[CHRIS MORSE <chris@invalid.net>]

On Tue, 18 Mar 2003 10:40:07 -0500, Yves McDonald
<""yves.mcdonald\"@NO SPAM sympatico.ca> wrote:

>> 
>Some good news for //e, 2c users!  From a quick look in my //e Technical 
>book (Apple/Addison-Wesley edition), there is an interrupt associated 
>with Vertical Blanking (every 16ms) and OS interrupt support with ProDOS 8.
>The bad news: sorry for ][+ users but there are no built-in interrupt 
>sources, altough a clever hardware hack exists to get vertical retrace 
>interrupts (REF: Jim Sather, Understanding the Apple II, p.3-19 to 
>3-26).  I guess Apple ][ users will have to provide their own  timer 
>interrupt services.
>
>Cheers,
>
>Yves

So how do you access the vertical retrace interrupt? :)
I was reading last night in Rodnay Zak's book "Programming The Apple
II In Assembly Language" and in the section on programming the mouse,
there are a couple of interrupt services with the mouse card, with one
being tied to the vertical retrace (60Hz).

I hope I can find a //e Tech Ref manual.  I keep checking eBay.  But I
did order the //c Tech Ref manual (2nd ed, covering the //c+ also)
from A2Central.  Unfortunately, they say 6-8 weeks for delivery.

I used to have a TimeMaster II H.O. card, and I recall it able to do
60 interrupts/sec also.  Probably the same vertical retrace thing.

Will be interested to hear more! :)

// CHRIS