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- Path: comma.rhein.de!serpens!not-for-mail
- From: mlelstv@serpens.rhein.de (Michael van Elst)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Demo/game to OS friendly part II
- Date: 16 Jan 1996 12:12:19 +0100
- Organization: dis-
- Message-ID: <4dg16j$ha1@serpens.rhein.de>
- References: <4csu3p$oa6@sunsystem5.informatik.tu-muenchen.de> <4cu1jn$1n7@serpens.rhein.de> <4cv7mb$dn6@sunsystem5.informatik.tu-muenchen.de> <4d0k83$atl@serpens.rhein.de> <4d6am7$i9k@sunsystem5.informatik.tu-muenchen.de> <4ddhou$7qu@serpens.rhein.de> <4deshh$mpj@sunsystem5.informatik.tu-muenchen.de>
- NNTP-Posting-Host: serpens.rhein.de
-
- fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) writes:
-
- >Michael van Elst (mlelstv@serpens.rhein.de) wrote:
- >: fischerj@informatik.tu-muenchen.de (Juergen "Rally" Fischer) writes:
-
- >: >aeh :) I mean, the videocontroll just changes bplcon to get it
- >: >non-dualpf, but the OS still handles it as dualpf ?
-
- >: It is still treated as two bitmaps.
-
- >not by the hardware, I guess ;)
-
- You have problems with the english language.
-
- Yes. It is treated as two bitmaps by the hardware, so-called _play-fields_.
- These play-fields can be scrolled independently.
-
- It is not handled as dual-play-field-mode which would change the
- colormapping scheme.
-
- >: Read the section about dual-playfield screens.
-
- >It tells there are 2 tmpras chained together, as there is no
- >next * I guess I got to just put 2 struc tmpras sequential in mem ?
-
- You have problems with reading even simple text. The structure is
- called RasInfo. TmpRas is used as temporary storage for some rendering
- functions.
-
- struct RasInfo /* used by callers to and InitDspC() */
- {
- struct RasInfo *Next; /* used for dualpf */
- struct BitMap *BitMap;
- WORD RxOffset,RyOffset; /* scroll offsets in this BitMap */
- };
-
- >the setup doesn't chaging $102 every scanline. the one that would does make
- >a blank each 2nd line, you said.
-
- I said ? Check your brain.
-
- >: >written each scanline to get ghost-look. I know that only stripe look
- >: >is possible without this.
-
- >mhm anyway I only need the 8 sprites for the special case: AGA&(PAL|NTSC),
- >so after checking I can just rape the sprites.
-
- No, you can't.
-
- --
- Michael van Elst
-
- Internet: mlelstv@serpens.rhein.de
- "A potential Snark may lurk in every tree."
-