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

Confirm comment report request

simo: Is that old McCauley or new Drag McCauly? ;)

It's not about instructions, it's about where a process's state is held. A process has to be explicity loaded into registers, in bigger OSs page tables for virtual memory have to be set up, and so on - giving that (virtual) CPU the task to run. The operating system is the only entity that knows where this active state is, so only it can decide.

JessFranco:

But the extra processor cards on old macs were largely unused, as they had to be explicity programmed for, and having the application manage the sharing is not teh best solution (it has to save off the processor incase other apps want it, or just hold exclusive use of it). Anyway, history shows that such cards were largely under utilised. It's only when multiprocessor support comes for free through OS thread management that multiprocessor macs became properly utilised.

All repeat after me: this requires OS support, this requires OS support, this... ;)

 is a RISC OS UserDougal on 22/10/03 9:56AM
[ 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: / 34.204.200.74
Comment GID: 6800
Timestamp: Tue, 21 Jan 2020 12:09:50 +0000

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

  • Animated cursor silly now 32bit-compatible
    DogGlass converted and MouseScale also updated
     Discuss this. Published: 22 Apr 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
    "I'm not sure I could have trusted you six months ago"
    Page generated in 0.0379 seconds.