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- Xref: sparky comp.unix.bsd:10688 comp.os.linux:21889 comp.unix.pc-clone.32bit:911
- Path: sparky!uunet!pipex!warwick!uknet!comlab.ox.ac.uk!jon
- From: jon@robots.ox.ac.uk (Jon Tombs)
- Newsgroups: comp.unix.bsd,comp.os.linux,comp.unix.pc-clone.32bit
- Subject: Re: ET4000/W32 and VESA VL-Bus
- Message-ID: <1992Dec28.103211.12677@diomedes.robots.ox.ac.uk>
- Date: 28 Dec 92 10:32:11 GMT
- References: <1992Dec17.190542.2662@utagraph.uta.edu>> <1992Dec18.095906.3950@Informatik.TU-Muenchen.DE> <1hloneINNfnn@cbl.umd.edu>
- Organization: Robotics Research Group, Engineering Science Dept, Oxford, UK.
- Lines: 48
- Originator: jon@diomedes.robots
-
- In article <1hloneINNfnn@cbl.umd.edu> mike@starburst.umd.edu (Michael F. Santangelo) writes:
- >>Also there are quite a number of S3 chips, which use EITHER VRAM or
- >>DRAM:
- >
- >> 86C911 VRAM
- >> 86C924 VRAM
- >> 86C801 DRAM
- >> 86C805 DRAM
- >> 86C928 VRAM
- >
- >
- >>What I am saying is that for 1028x768 in 70Hz and 1280x1024 you should
- >>generally forget the DRAM based solutions. Even if they look good at
- >>benchmarks; most of these benchmarks used a 640x480 resolution,
- >>where the screen refresh only takes 25MB/sec, and the available
- >>bandwidth for graphics operations is quite the same as for VRAM based
- >>solutions. But if you use the DRAM based boards at 1024x768, 70Hz,
- >>you'll see the difference.
-
- The 801 is indeed DRAM based (60ns DRAM), For the 911 and 801 boards both
- for 71Hz refresh at 1024x768 on a 13MHz ISA bus I get:
-
- 70MHz S3 911 (Actix GraphicsEngine70)
- TOTAL 103781 lineStones
- TOTAL 21777 fillStones
- TOTAL 16997 blitStones
- TOTAL 2580416 arcStones
- TOTAL 83875 textStones
- TOTAL 46797 complexStones
- TOTAL 37496 xStones
-
- S3 801 (Actix GraphicsEngine32)
- TOTAL 107908 lineStones
- TOTAL 42632 fillStones
- TOTAL 31590 blitStones
- TOTAL 2975512 arcStones
- TOTAL 117562 textStones
- TOTAL 92352 complexStones
- TOTAL 64061 xStones
-
- When I get back from holiday I'll repeat the benchmarks at several
- different clock speeds and resolutions. Possibly the 801 will be faster
- at lower clock speed/resolutions, but it is still thrashing the VRAM based
- Actix GraphicsEngine70, which was the fastest 911 based card I found.
-
- --
- Jon <jon@robots.ox.ac.uk> (for a .vacation fortune)
- "I got in today just as the sun was crashing"
-