VBI's and DLI's

[Pengwin]

Not sure if I should be posting this in this forum or the programming forum, but as I've posted here before, I figure "what the hell".

What I'm after is tutorials for VBI and DLI programming...how to do it, what exactly they are for etc.

Can't anyone point me in the right direction?

[Allas]

You need to learn carefully what is DL (Display Lists), DLI (Display List Interrupt) and VBI (Vertical Blank interrupt) in this order.

 

DL topic is very well explained at Display Lists technique

 

You can read the basics of DLIs in this topic Display List Interrupts

 

Finally VBIs is at....mmm... I cant found where is... but It's easy with help... meanwhile you could read Dl and DLI first, after that I'll write how to do a VBI.

Edited November 15, 2006 by Allas

[Rybags]

The Operating System Manual has a fairly reasonable description on VBIs.

 

Just one thing that rarely gets mentioned:

 

perform a CLD if your routine needs to perform maths instructions (the XL OS fixed this oversight in it's VB code, but older machines don't do it for VBIs).

[Pengwin]

Thanks for the info guys. I shall dig out my copy of De Re Atari and check it out.

[deathtrappomegranate]

De Re Atari is a must-read, but I quite like the style of the Tricky Tutorials series.

 

Here's a link to the display list one: http://www.atarimania.com/detail_soft.php?...ERSION_ID=13008

 

The manual is pretty readable.