On Fri, Jul 18, 2003 at 07:20:22AM +0100, Mark Wilkinson wrote:
Will correct that, although what I can remember from the northbridge docs is that a setting of 0 also disables the framebuffer - perhaps this option is really a 'have framebuffer, but don't share with it memory option'
vgainit.inc has #if's to examine the value to choose the value for the northbridge register, it cause #error if it's 0.
option ZKERNEL_START=0xfffc0000 option VGABIOS_START=0xfffe0000 addaction romimage dd if=/path/to/vgabios.bin of=romimage bs=65536 \seek=2 conv=sync conv=notrunc
so this copies the vgabios into the rom image after the payload (not the otherway around) doesn't copying 65536 bytes to 0xfffe000 overwrite the Linuxbios part of the rom image ? or is that done afterwards, in which case the LinuxBIOS would overwrite part of the vgabios image... althought, I think the VGA bios is only 48K in size isn't it !
It copies vgabios.bin at 128-192KB of romimage. LinuxBIOS lives at 192-256KB. 128KB space at the beginning is left for payload.