Dear listener
I'm having problem trying to setup a 640x480 image background with latest
syslinux...
the system start correctly but graphics is not shown at all... only text is
visible...
are there minimum requirements for a graphic extlinux background ?
CPU is a Vortex86Sx (with no math processor) at 300MHz, 128MB RAM
video card is a XGI Volari Z9s with 32MB RAM
is there a way to retrieve more debug info from vesamenu.c32 ?
thanks
Giampaolo
On 03/28/2010 02:58 PM, Giampaolo Bellini wrote:> Dear listener > > I'm having problem trying to setup a 640x480 image background with latest > syslinux... > the system start correctly but graphics is not shown at all... only text is > visible... > > are there minimum requirements for a graphic extlinux background ? > > CPU is a Vortex86Sx (with no math processor) at 300MHz, 128MB RAM > video card is a XGI Volari Z9s with 32MB RAM > > is there a way to retrieve more debug info from vesamenu.c32 ? >An FPU is required for the graphics libraries to work. This probably *could* be addressed (I think it's only used for gamma correction in libpng), but you're the first one to comment on this. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
On 03/29/2010 12:01 AM, Giampaolo Bellini wrote:> Hi Peter > > thanks a lot for your help... I'll take a look at libpng... >Turns out I'm wrong; floating point is also used in the JPEG library. This is pretty easy to determine by compiling with -msoft-float. This probably means we need *either* a floating-point emulator which hooks the #NM trap, or compile with -msoft-float and provide the necessary routines. I really don't want to go the latter route for the general codebase, since it would benefit so few systems (I didn't know anyone still built 486SX-class chips!), but it is likely to be the fastest way for you to get what you want. Either way you need a set of floating-point emulation routines. Another option is to define a new splash screen format which is simpler to decode than PNG or JPEG and therefore doesn't need floating point; at that point we could allow FPU-less systems to enter graphics mode and just not support PNG or JPEG decoding. In Syslinux 5 it's a bit cleaner to pull in an FPU emulator on needed systems. -hpa