|
|
Atari coding BBS
| Re: 4 pixel rasters |
|---|
|
Posted by: Leonard
|
Jun,13.2006-10:27
|
Well read that excellent article, written by Ijor to help me clarify 68k prefetch behavior for SainT. His article helped me a lot.
To resume, there is some different "classes" of instruction. Almost all instructions do the "write back" stage before the "prefetch" stage.
But some (as add.w d0,(a0)) did "the write back" at the very end of instruction, so the write is very "close" to the following move write (which (the instruction) is entirely prefetched))
That's why you get a 4 pixels. But of course you can't link several 4 pixels stuff together because a) the move take 8cycles and b) the add takes more ! (12)
|
[All messages in this thread] [Start new thread]
|
Topic
|
Posted by
|
Date
|
|
4 pixel rasters
|
ultra
|
Jun,08.2006-00:40
|
|
Re: 4 pixel rasters
|
ultra
|
Jun,08.2006-00:43
|
|
Re: 4 pixel rasters
|
evil
|
Jun,08.2006-08:20
|
|
Re: 4 pixel rasters
|
ultra
|
Jun,08.2006-08:45
|
|
Re: 4 pixel rasters
|
earx
|
Jun,08.2006-08:55
|
|
Re: 4 pixel rasters
|
earx
|
Jun,08.2006-08:56
|
|
Re: 4 pixel rasters
|
utlra
|
Jun,08.2006-09:00
|
|
Re: 4 pixel rasters
|
ultra
|
Jun,08.2006-10:17
|
|
Re: 4 pixel rasters
|
ultra
|
Jun,08.2006-11:02
|
|
Re: 4 pixel rasters
|
earx
|
Jun,08.2006-11:20
|
|
Re: 4 pixel rasters
|
ultra
|
Jun,08.2006-11:37
|
|
Re: 4 pixel rasters
|
earx
|
Jun,08.2006-16:35
|
|
Re: 4 pixel rasters
|
Creature XL
|
Jun,09.2006-09:31
|
|
Re: 4 pixel rasters
|
ultra
|
Jun,09.2006-10:17
|
|
Re: 4 pixel rasters
|
ultra
|
Jun,09.2006-10:36
|
|
Re: 4 pixel rasters
|
Leonard
|
Jun,13.2006-10:27
|
|
Re: 4 pixel rasters
|
alien st/cnx
|
Jun,15.2006-18:34
|
|
Re: 4 pixel rasters
|
Leonard
|
Jun,19.2006-11:12
|
|
Re: 4 pixel rasters
|
alien st/cnx
|
Jun,21.2006-03:08
|
|
Re: 4 pixel rasters
|
Leonard
|
Jun,21.2006-17:26
|
|
Re: 4 pixel rasters
|
evil
|
Jun,21.2006-18:30
|
|
Re: 4 pixel rasters
|
ggn/KUA
|
Jun,22.2006-08:48
|
What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
|
