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- Path: sparky!uunet!mcsun!sun4nl!hacktic!utopia!global!peter
- From: peter@global.hacktic.nl (Peter Busser)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: More on Local Bus - What about Unix?? S3 vs. (fwd)
- Message-ID: <713041208snx@global.hacktic.nl>
- Date: Wed, 05 Aug 92 19:00:08 GMT
- References: <BsM9qv.IxK@usenet.ucs.indiana.edu>
- Distribution: world
- Organization: What organization???
- Lines: 82
-
-
- In article <BsM9qv.IxK@usenet.ucs.indiana.edu> Iskandar writes:
-
- > Yeah I suspected it was the CPU.. from what I've heard Amiga
- > video is lightning quick when screen switching is done, but
- > using windows on Workbench is quite slow.
- I've worked with an Amiga for a longer period (a few months) using the old
- 1.3 system and I wasn't impressed by the speed.
-
- > |It sounds to me like the chunky-pixel approach is easier on the CPU
- > |for straight drawing operations. Also Microsoft Windows' drawing code
- > |may be more efficient on the CPU than the Amiga's Intuition code,
- > |partly due to the lack of bitplane worries.
- I think that OS/2 v1.3 places windows at byte boundaries which should simplify
- things like scrolling and such considerably. Maybe they (= MS) do the same in
- Windows.
-
- > Thats mainly what turned me off from the Amiga in the
- > beginning. Chunky pixels.
- What turned me off from the Amiga is poor overal display quality: low refresh
- rate, 4 colours (in the standard WB) and low resolution (640x200).
-
- > |I'm not going to get into the CPU debate, considering that I've now
- > |seen it argued both ways (an Intel advocate posted claiming that
- > |Intels were more efficient in clock counts for many operations than
- > |the Motorolas).
- Maybe, but the glue-chips on a board are very important for good performance.
- Comparing CPU's doesn't take those chips into account and is therefore
- meaningless.
-
- > |Let's just say that even assuming the Motorola
- > |advocates were right, your higher clock speed probably nullifies any
- > |such advantage.
- > Oh I agree. The Motorola designs are probably better but Intel
- > and its competitors have manufacturing down better and can achieve
- > higher speeds.
- For lower prices (mainly because there ARE competitors).
-
- > |So I am starting to wonder how much of this Amiga fast video
- > |stuff is really hype, and whether Amiga users have really seen
- > |a real 486 with a Tseng or S3 card perform.
- Hmmm, but a A500 is cheaper than a 486 with a Tseng/S3 card...
-
- > |that having a dedicated graphics coprocessor is better than doing
- > |CPU-managed graphics. I agree with him. But the graphics coprocessor
- > |(or Copper) plus blitter in the Amiga is hardly describeable as
- > |"advanced" by current standards.
- Indeed, things like TMS34010/34020 and the i860 are general purpose CPU's
- with special units to support graphics. Instead of only drawing lines or
- filling polygons, these chips can do anything.
-
- > |forget it. Those may be beyond most PC's at present, too, but they
- > |are what I think of when I hear "advanced".
- > Ah... I was wondering what a Copper was 8-) So if I buy an
- > S3 or ATI Ultra card I have a copper in my PC!
- Not exactly. The copper can change registers from other peripherals. By using
- a so called copper-list one can make for instance pallette scrolling without
- CPU intervention.
-
- > My guess is that it won't be long before things like the
- > S3 chip find their way into the Amiga world. Until then I
- > guess the PCs will be faster for a while.
- Nope, forget it! The Amiga is a low-cost machine. Besides that, the most
- popular software is the software that uses the special hardware well. Any
- hardware incompatibility breaks that software imediately. I think CBM will
- produce Amiga's which are almost exactly what they have been since 1985 until
- the profits drop. After that hey will come out with something new, but still
- for the same market as the C64 and the Amiga.
-
- > |This is just one of many reasons why I'm selling my A3000, and it's
- > |not the most important, either. The Amiga should have a new chipset
- > |coming out relatively soon, but due to inherent design limitations,
- > |it will probably only get a 4x speedup, and that just won't be enough.
- That depends on what you want. You know, you don't have to buy a new computer
- just because someone else has a computer with more ..... <fill in your
- favorite> than your computer.
-
- Greetings,
- Peter Busser
- ---
- I don't do .sigs
-
-