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- Path: nntp.earthlink.net!usenet
- From: psheffield@earthlink.net (Patrick Sheffield)
- Newsgroups: comp.sys.amiga.emulations
- Subject: Re: SS and CyberGraphX
- Date: 23 Feb 1996 20:53:55 GMT
- Organization: Earthlink Network, Inc.
- Message-ID: <1244.6627T763T1170@earthlink.net>
- References: <4gacel$j6o@newsstand.cit.cornell.edu> <312A0480.2878@sn.no> <312C8985.41C6@felix.univ.szczecin.pl>
- NNTP-Posting-Host: psheffield.earthlink.net
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP) *UNREGISTERED*
-
- >Joerund Myhre wrote:
- >>
- >> Benjamin Kenobi wrote:
- >> >
- >> > Is there any way to keep SS from trashing other CyberGraphX screens? As
- >> > I understand it, this happens because SS writes directly into the card
- >> > memory and cannot redirect it's drawing into another buffer when another
- >> > screen is displayed. Is there a way to "stop" shapeshifter when you
- >> > switch to another CGX screen?
- >> >
- >> Use the commodity MCP, it freezes Shapeshifter beeing on another screen.
-
- >This is not a solution, because it's not possible to use MAC-Handler
- >then. Mac-Handler calls functions in Mac's ROM and Mac is freezed, so...
-
- >I wonder if it wasn't possible to remap SS memory accesses with MMU, and
- >force it to use screen-image in FAST RAM, when SS screen is not
- >frontmost. But it will take Mr. Bauer to answer this question, I guess.
- >:)
-
- Unfortunately, there is /No/ copy in fast ram. That is just the point. The
- reason for screen corruption is that the Mac process is given the direct
- memory location for the graphic card's screen memory so it may be treated
- exactly like a real Mac. Thus the Mac process is simply updating what it
- views as /It's/ screen.
-
- That is the trade-off for the Real-Mac-like screen performance.
-
- Patrick Sheffield
-
-