Drobe :: The archives
About Drobe | Contact | RSS | Twitter | Tech docs | Downloads | BBC Micro

Confirm comment report request

The bottleneck is the podule bus, not the internal memory interface of the GPU: I suspect the difference between the cards lies in efficiency of memory transfer over the podule bus, and the relative complexity of setting up accelerated commands on the R128 versus SM50X chipsets.

Adding a faster GPU will help just about as much as adding a shiny new SSD drive to the RPC's interface - you will still get <6MB/sec data transfer, even though the drive could manage nearer 300MB/sec! NB both drivers were written by the same author and have the same featureset (indeed share the same common codebase).

Most of the tests I'd seen were done by the author and are common, reproducible operations - complex draw file rendering, circle drawing, desktop redraw time, accelerated sprite plots, etc. It would be relatively easy for someone to independently write some test programs in BASIC to test this.

 is a RISC OS Usermd0u80c9 on 19/8/09 10:31PM
[ Reply | Permalink | Report ]

Click on the button below to confirm you wish to flag up this comment to the website's administrators. Abuse of this service will be frowned upon and it should only be used to notify us of comments that are extremely distasteful, indecent or otherwise unlawful. If you disagree with an opinion expressed or fact stated in a comment, please take part in the debate rather than expect it to be removed.

Return to the drobe.co.uk front page

Details

Reporting user / IP: / 3.85.214.0
Comment GID: 31488
Timestamp: Wed, 23 Oct 2019 17:59:55 +0000

Search the archives

Today's featured article

  • A9home DIY laptop: first pictures
    And other odds and sods from the Christmas 2007 show
     22 comments, latest by sa110 on 1/6/08 4:47PM. Published: 1 Dec 2007

  • Random article

  • Replay keyboard strokes with KlikMacro
    Acorn era-coder returns to rerelease desktop utility
     Discuss this. Published: 11 Feb 2007

  • Useful links

    News and media:
    IconbarMyRISCOSArcSiteRISCOScodeANSC.S.A.AnnounceArchiveQercusRiscWorldDrag'n'DropGAG-News

    Top developers:
    RISCOS LtdRISC OS OpenMW SoftwareR-CompAdvantage SixVirtualAcorn

    Dealers:
    CJE MicrosAPDLCastlea4X-AmpleLiquid SiliconWebmonster

    Usergroups:
    WROCCRONENKACCIRUGSASAUGROUGOLRONWUGMUGWAUGGAGRISCOS.be

    Useful:
    RISCOS.org.ukRISCOS.orgRISCOS.infoFilebaseChris Why's Acorn/RISC OS collectionNetSurf

    Non-RISC OS:
    The RegisterThe InquirerApple InsiderBBC NewsSky NewsGoogle Newsxkcddiodesign


    © 1999-2009 The Drobe Team. Some rights reserved, click here for more information
    Powered by MiniDrobeCMS, based on J4U | Statistics
    "Drobe is the most frequently updated and has the most content, but apparently they aren't interested in 'special offers'"
    Page generated in 0.0379 seconds.