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- Path: apollo.roskildees.dk!christ
- From: christ@apollo.roskildees.dk (Christian Hessenbruch)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: AGA-Assembly problems :(
- Date: 2 Feb 1996 07:53:50 GMT
- Organization: News Server at UNI-C, Danish Computing Centre for Research and Education.
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- References: <rade-1601961437210001@cip-mac6.coli.uni-sb.de> <4elqnb$9dc@sunsystem5.informatik.tu-muenchen.de>
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-
- : |>
- : |> 3. I've another question on the display modulos ($108, $10a). I know I
- : |> have to set them to -8
- : |> when I display an AGA-pic (FMode=3). But why? How is this calculated? What
- : |> values do I need to display an 8-bpl-picture with FMode=0? (it should
- : |> work, but I couldn't work it out)
- : with fmode = 0 it should be same values like on OCS!
- : on fmode = 3 I always managed to get proper display with all modulos 0.
- : no -8 ... -8 sounds like having too much display dma!
-
- I belive the reason is that the bitmap lines has to be aligned
- to 8 when using fmode 3, and as your lines are 40 the DMA will
- adjust to 48 (6*8) and then you readjust by setting modulo -8.
-
-
- <<================================================================>>
- << Christian Hessenbruch : christ@apollo.roskildees.dk >>
- <<---------------------------------------------------------------->>
- << How 'bout visiting : http://apollo.roskildees.dk/~christ >>
- <<================================================================>>
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