search for: adjust_drive

...tion information */ 2: movl 8(%si), %ecx #endif 1: /* We have no partition information */ pushl %ebx /* -4: partoffset_hi */ pushl %ecx /* -8: partoffset_lo */ pushw %es /* -10: es:di -> $PnP header */ pushw %di /* -12: es:di -> $PnP header */ movw %bp, %ds movw %bp, %es ADJUST_DRIVE pushw %dx /* -14: dl -> drive number */ /* Copy down to 0:0x600 */ movw $0x7c00, %si movw $_start, %di movw $(512/2), %cx rep; movsw ljmpw $0, $next next: /* Check to see if we have EBIOS */ pushw %dx /* drive number */ movb $0x41, %ah /* %al == 0 already */ Here it claims that...

...io <frediano.ziglio at citrix.com> --- mbr/gptmbr.S | 42 +++++++++++++++++++++++++++++------------- 1 files changed, 29 insertions(+), 13 deletions(-) diff --git a/mbr/gptmbr.S b/mbr/gptmbr.S index b0c11b9..f0955b2 100644 --- a/mbr/gptmbr.S +++ b/mbr/gptmbr.S @@ -77,6 +77,12 @@ next: ADJUST_DRIVE pushw %dx /* 0(%bp) = %dl -> drive number */ + movw %sp, %bp /* %bp -> frame pointer: LEAVE UNCHANGED */ + + /* prepare to read sector size */ + sub $0x1c, %sp /* -28(%bp) == %sp */ + pushw $0x1e /* -30(%bp) == %sp */ + movw $0x200, -6(%bp) /* -6(%bp) sector size */ /* Check to see if...

This patches add support for dynamic sectors to GPT MBR code. First 3 patches are trick and optimizations to gain some space for the forth patch. I have a modified version of SeaBIOS, some code and some script o test it I'll send on a different mail.

...quot; pop %si #endif movl 8(%si), %ecx #endif 1: /* We have no partition information */ pushl %ebx /* -4: partoffset_hi */ pushl %ecx /* -8: partoffset_lo */ pushw %es /* -10: es:di -> $PnP header */ pushw %di /* -12: es:di -> $PnP header */ movw %bp, %ds movw %bp, %es ADJUST_DRIVE pushw %dx /* -14: dl -> drive number */ /* Copy down to 0:0x600 */ movw $0x7c00, %si movw $_start, %di movw $(512/2), %cx rep; movsw ljmpw $0, $next next: /* Check to see if we have EBIOS */ pushw %dx /* drive number */ movb $0x41, %ah /* %al == 0 already */ movw $0x55aa, %bx x...

This set of patches add some support for sector size >512. Currently it fixes extlinux, MBR for GPT and ext partitions. Other code is unaffected. This set of patches has been tested on a read Dell machine running a beta firmware.