On Mon, 4 Nov 2002, Luugi Marsan wrote: > >>I understand, but 256 megs = 256 * 1024 * 1024* 8 bits = 2^ 31 bits= > >>2147483648. The Xserver calculates the memory in bits when validating > >>the mode.
> >No, it doesn't. apertureSize is in bytes. > apertureSize is indeed in bytes, but in xf86Modes.c, > xf86InitialCheckModeForDriver() has this check. This is in XFree86 4.2.0. > -- > if (mode->HDisplay * mode->VDisplay * scrp->fbFormat.bitsPerPixel > > scrp->videoRam * (1024 * 8)) > return MODE_MEM; > -- > where: > scrp ->videoRam = 256 * 1024 ( since videoRam is in Kbytes) > When calculating the right hand side of the comparison, the right hand > side is equal to 256*1024*1024*8 = 2^31. The left hand side is also > calculated in bits, since it multiplies the display by the number of > bits per pixel. I stand corrected. I'll take care of this. Thanks for pointing it out. Marc. +----------------------------------+-----------------------------------+ | Marc Aurele La France | work: 1-780-492-9310 | | Computing and Network Services | fax: 1-780-492-1729 | | 352 General Services Building | email: [EMAIL PROTECTED] | | University of Alberta +-----------------------------------+ | Edmonton, Alberta | | | T6G 2H1 | Standard disclaimers apply | | CANADA | | +----------------------------------+-----------------------------------+ XFree86 Core Team member. ATI driver and X server internals. _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
