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- Path: sparky!uunet!portal!cup.portal.com!jharris
- From: jharris@cup.portal.com (John D Harris)
- Newsgroups: comp.sys.amiga.emulations
- Subject: Re: Who has a working EMPLANT?
- Message-ID: <70072@cup.portal.com>
- Date: Sun, 22 Nov 92 18:07:04 PST
- Organization: The Portal System (TM)
- References: <69827@cup.portal.com> <jdrew.0jmj@cryo.rain.com>
- Lines: 27
-
- >> 4. At least twice as slow or worse. I haven't worked with a real MacII. I
- >
- >What program did you use to compare speed test vs a MAC II? What
- >priority? What video refresh rate? What video depth (2, 4, 16, or 256
- >colors)?
-
- Jim,
- This comment was not in relation to the speed of a real Mac II. The
- question was asked about how much slower applications run in color vs.
- B&W on Emplant. I was in 16 color mode, priority 0, refresh 20, (i.e.
- default conditions), and my primary application is Personal Hotline. I
- haven't worked with a real Mac II, so I can offer no speed comparisons
- between Emplant and a real Mac.
-
- On your BBS, someone hinted that the reason Emplant runs so much slower in
- color is the extra DMA bus contention. I would have expected most of the
- emulation to run in fast ram, and be immune to this. Is it the display
- conversion routines that are effected here, or more generally, is it
- primarily the overhead of converting color video that is stealing CPU time
- from the emulation?
-
- What future options might we have for getting a real time color display with
- no CPU overhead? AGA chunky pixels? Another video card? Other???
-
- When the Mac II operates in B&W, is screen memory similar to what it was
- like on older B&W Macs, in that a one bitplane Amiga screen could display it
- directly with no conversions, ala AMax?
-