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- Path: informatik.tu-muenchen.de!fischerj
- From: fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Amiga vs. PC
- Date: 20 Mar 1996 02:57:29 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4ins6p$eh6@sunsystem5.informatik.tu-muenchen.de>
- References: <rdingem.4k6k@grafix.xs4all.nl> <4i00f6$msh@nnrp1.news.primenet.com>
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-
- Daniel L. Taylor (pdtaylor@primenet.com) wrote:
-
- : This doesn't require Dave to answer. What do most personal computers, any
- : flavor, spend most of their time doing? Waiting for user input. Whether
-
- If you mean the computers you use at home, no, the cpu spends most of
- time in a texturemapping loop rendering a 3d scene of a action game.
-
- : to the keyboard/mouse/monitor in front of you can present responses to
- : your direct input in a timely (somewhat personal perference) manner, it's
- : fast enough. For the relatively few who do a lot of floating point
-
- indees it's not a question of MHz how long it takes the computer to
- respond to the keyboard.
-
- : neither does waiting the 9-14 milliseconds for a disk to seek (or
- : 135-350 ms for a CDROM drive), and even a 6809 can keep up with the
- : transfer requirements of all but the fastest disks, much less the
-
- but not HDs I guess.
- mhm, talking to a 6809 fan, I'd like to know how is the fastest
- copy loop on 6809 ? :)
- having dealt with scroll/sprite routines in 8bit times (for the 6809
- only on paper ;) I asked myself what'd be best.
-
- push/pop ?
- mhm, R++ is 6 cycles :\
- I guess you can also push R++ which is not possible on 68k ?
-
- mhm best would be a array of LDD/STD instructions for copy
- with fix source/dest adr ;)
-
- LDD src STD dst LDD src+2 STD dst+2 ... ;))
-
- 12 cycles/2 byte. 333k/sec
-
- Afaik fastest on Z80 is LDI LDI, 18 cycles/byte, 4MHz, 222k/sec
- (but flexible adress copy ;)
-
- 6502, 9 cycles ? 2Mhz = 222k/sec
- for C64 users 0.9 MHz = 100k/sec :D
- sorry. I know you do the cooles texture mapping demos of 8bit
- computers :) really cool.
-
- my A1201: 68020, 14MHz: 8.8mb/sec, quite much for that little computer.
-
- : This is why the 16-bit Amiga's can still provide seriously useful
- : service in an era when 64-bit busses are becoming readily available.
-
- : --
- : -------------------------------------------------------------------------------
- : pdtaylor __ __ ____ ___ ___ ____
- : pdtaylor@primenet.com /__)/__) / / / / /_ /\ / /_ /
- : / / \ / / / / /__ / \/ /___ /-------------------------------------------------------------------------------
- ------------------------------------------------------------------------
- fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) =:)
-