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

Reply to thread

simo - the chip may be different, but ADFS itself isn't. That's one of the many reasons why ADFS is so slow. The Risc PC can't, AFAICT, support DMA on its internal interface, which is unfortunate.

I've pointed this out before, but there are billions of things you can do to ADFS to bring it up to date, and DMA transfers is a big one on a system that supports them. Creating a filesystem which uses DMA is itself not too difficult.

Filecore is a major bottleneck too - you can't, for example, command cache correctly using filecore, and the way it currently does its sector requests is pretty inefficient when compared to ATA or SCSI specs.

But that's a MUCH meatier job. Anyone who plays with Filecore though is incredibly brave. Or stupid. Or both. After all, it's possible, but much trickier, to cause data corruption in ADFS. Trashing a hard disc by modifying filecore is no doubt easy-peasy :).

 is a RISC OS Usermd0u80c9 on 14/5/04 7:00PM
[ Reply | Permalink | Report ]

Please login before posting a comment. Use the form on the right to do so or create a free account.

Search the archives

Today's featured article

  • Iyonix Review Part Two
    In this final part we look at RISC OS 5 and the bundled software
     4 comments, latest by hzn on 22/8/03 5:47AM. Published: 9 May 2003

  • Random article

  • Merry Christmas and a happy new year
    2008 is drawing to a close so it's time to wish every Drobe reader a merry Christmas and we hope you all have a happy new year. Thanks for dropping by every day to check out the latest RISC OS news and sticking with the site when we went silent for several months.
     10 comments, latest by AW on 27/12/08 9:31PM. Published: 24 Dec 2008

  • 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
    "RISC OS development is a waste of time with [Drobe's] aggressive attitude towards reporting and disregard of facts"
    Page generated in 0.0629 seconds.