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- Path: news.eunet.fi!newsmaster
- From: kp@direktor.voima.jkl.fi (Kari-Pekka Koljonen)
- Newsgroups: comp.sys.amiga.programmer
- Subject: CHIP RAM speed test results
- Date: 1 Mar 1996 18:47:22 GMT
- Message-ID: <1067.6635T1081T1567@direktor.voima.jkl.fi>
- NNTP-Posting-Host: kauhajoki.fi
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP) *UNREGISTERED*
-
- Because there's so much talk about the chip ram speed and chunky
- conversions I decided to time some values myself.
-
- Machine used: A1200/030/28MHz, all caches & bursts on. Both tests took
- over the system and disabled all interrupts, fmode was %11.
-
-
- Test 1: 320x256x8 screen
- ------------------------
- Copy $14000 bytes (screenful) of data from fast to chip using the following
- routine:
-
- loop:
- rept 8
- move.l (a0)+,(a1)+
- endr
- dbf d0,loop
-
- Time: 336 rasterlines = 21.5 ms (50Hz=20ms=one frame=312 rasterlines, I think)
-
-
- Test 2: 320x256x5 screen
- ------------------------
- Copy $c800 bytes, otherwise the same as above.
-
- Time: 196 rasterlines = 12.6 ms
-
-
- So if all Amigas have about the same chip ram speed it's impossible to do a
- 50Hz 320x256x8 chunky to planar screen, even if you had a 060/80MHz.
-
-
-
- ***************************************************
- K-P Koljonen / Hippopotamus Design / iNSANE
- kp@direktor.voima.jkl.fi, kpkoljon@freenet.hut.fi
- http://direktor.voima.jkl.fi/~kp K-P@IRC
- ***************************************************
-
-
-