similar to: where to swap

On Sat, Mar 25, 2017 at 06:51:50PM +0100, Geert Stappers via Syslinux wrote: > It is good to see this > ----- Forwarded message from syslinux-bot for Martin Str|mberg <ams at ludd.ltu.se> ----- > Date: Sat, 25 Mar 2017 05:54:09 -0700 > From: syslinux-bot for Martin Str|mberg <ams at ludd.ltu.se> > Subject: [syslinux:master] mbr/isohdpfx.S: correct pointer for

On Fri, Mar 24, 2017 at 05:38:31PM +0100, Thomas Schmitt via Syslinux wrote: > isohdpfc pushes the CX value to the stack which it gets from INT 13 AH 41. > Quite surely bit 0 of that CX is not set. But bit 2 "Enhanced Disk Drive" > could be set. > https://en.wikipedia.org/wiki/INT_13H > > I understand on David's BIOS after > > andw $1,%cx

Hi, i am looking now at the code which i assume loads the rest of isolinux.bin. The entry point for program execution from the MBR is obviously at http://git.zytor.com/syslinux/syslinux.git/tree/core/isolinux.asm#n186 (Do i get it right that this is the Intel syntax ? (Gronfff)) If POP yields the victim of the most recent not yet popped PUSH, then this does not look correctly coordinated

Hi, FYI syslinux upstream has a bugfix. Both in the 6.xx branch and the 4.xx branch. ----- Forwarded message from syslinux-bot for Martin Str|mberg <ams at ludd.ltu.se> ----- Date: Sat, 15 Apr 2017 10:27:08 -0700 From: syslinux-bot for Martin Str|mberg <ams at ludd.ltu.se> To: Syslinux commits mailing list <syslinux-commits at zytor.com> Cc: ams at ludd.ltu.se Subject:

Thomas Schmitt wrote: > My main point of interest is which block is really loaded as first one > of isolinux.bin. [Program snipped.] > (It could be shorter if i did not insist in big endian words.) Why insisting? Anyway appended is a dumper version. I could put up a binery version if needed. Let me know if so. -- MartinS /*

From: MartinS <ams at ludd.ltu.se> isohdp[fp]v.S which says E or C if EBIOS or CBIOS is used. isohdppv.S also says G or M if a GPT or MBR partition is detected. Signed-off-by: MartinS <ams at ludd.ltu.se> --- Comments? diff --git a/mbr/Makefile b/mbr/Makefile index be2bded..7095396 100644 --- a/mbr/Makefile +++ b/mbr/Makefile @@ -21,7 +21,8 @@ include $(MAKEDIR)/embedded.mk all:

On Tue, Mar 21, 2017 at 09:03:35AM +0100, Thomas Schmitt via Syslinux wrote: > I think we should offer David a binary which he can combine with > the MBR of the ISO and the image with the recognizable blocks. > I will later today upload a binary version of my block producer > and post the URL. > > The combination will be: > 432 bytes from Martin's MBR > 80 bytes

Hi, given the fact that the conversion has the factor HC*SH = "secpercyl", which is invariant under swapping, there remains as suspect in read_sector_cbios only this division: divb (sectors) There is a suspicious discrepancy in the code: heads = (stack-16) sectors = (stack-18) ... /* here we computer CHS values or just do some dummy computation for EBIOS */ andw $0x3f,

> On Fri, Feb 6, 2015 at 6:55 AM, Martin Str|mberg <ams at ludd.ltu.se> wrote: > > On Sun, Jan 25, 2015 at 06:13:13PM -0200, Raphael S Carvalho wrote: > >> On Sat, Nov 22, 2014 at 10:39 AM, Martin Str|mberg <ams at ludd.ltu.se> wrote: > >> > Hello. > >> > > >> > Use the z size specifier to printf-ing size_t variables to get rid of

On Fri, Feb 6, 2015 at 6:55 AM, Martin Str|mberg <ams at ludd.ltu.se> wrote: > On Sun, Jan 25, 2015 at 06:13:13PM -0200, Raphael S Carvalho wrote: >> On Sat, Nov 22, 2014 at 10:39 AM, Martin Str|mberg <ams at ludd.ltu.se> wrote: >> > Hello. >> > >> > Use the z size specifier to printf-ing size_t variables to get rid of gcc >> > warning

On Fri, Mar 24, 2017 at 2:55 PM, Martin Str|mberg via Syslinux <syslinux at zytor.com> wrote: > On Fri, Mar 24, 2017 at 05:38:31PM +0100, Thomas Schmitt via Syslinux wrote: >> isohdpfc pushes the CX value to the stack which it gets from INT 13 AH 41. >> Quite surely bit 0 of that CX is not set. But bit 2 "Enhanced Disk Drive" >> could be set. >>

Hi, for some reason David always omits the Cc: to this list. He has now reported to Martin and me the outcome of the latest two MBR test proposals. - His BIOS announces no LBA addressing but another extra feature. This lead to unexpected success in one of David's tests. - The newest fix proposal by Martin is a full success ! Distros which produce isohybrid should consider to already

Hi, funny or enlightening observation: With my qemu-system-i386 it would work if the detected Heads/Cylinder and Sectors/Head factors would change positions ! The effective read operation seems to use H/C = 32 , S/H = 63. The correct LBA would be addressed by H/C = 63 , S/H = 32. -------------------------------------------------------------------------- Reasoning: I have transplanted the

On Sun, Jan 25, 2015 at 06:13:13PM -0200, Raphael S Carvalho wrote: > On Sat, Nov 22, 2014 at 10:39 AM, Martin Str|mberg <ams at ludd.ltu.se> wrote: > > Hello. > > > > Use the z size specifier to printf-ing size_t variables to get rid of gcc > > warning > > format ?%08x? expects type ?unsigned int?, but argument 2 has type ?long unsigned int? > Please, add

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.

Hi, Geert Stappers wrote: > Contact David off-list, he did unsubscribe. Can you tell when he unsubscribed (i.e. which of the messages he got as last one) ? > Martin posted elsewhere in this thread "Thomas, you found the bug" > and provided a patch. Open question is whether the fix helps with David's BIOS. The newest answer from Martin indicates that a failure to read

X-Original-In-Reply-To: <CAD0Rxe=5uLCWQ+jfj1J6zepDzqx0vAiBREiwiKOih59MKgBDHg at mail.gmail.com> X-Previous: http://www.syslinux.org/archives/2015-January/023070.html On Mon, Jan 05, 2015 at 08:59:57PM -0500, Gene Cumm wrote: > On Sat, Jan 3, 2015 at 1:21 PM, Geert Stappers wrote: > > On Thu, Jan 01, 2015 at 09:48:16AM -0500, Gene Cumm wrote: > > >> I'm planning on

> Hi, > > i wrote: > > > I think it still has good reason to exist. > > Ady wrote: > > Would you please clarify what do you mean with "it"? > > "It" was the code part about > > xor %cx, %cx /* Clear EBIOS flag. */ > > which Martin mentioned as "can be ignored" in the the text which i > quoted

--- mbr/Makefile | 6 +- mbr/mbr-diag.S | 372 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 377 insertions(+), 1 deletions(-) create mode 100644 mbr/mbr-diag.S diff --git a/mbr/Makefile b/mbr/Makefile index 0bdf7e3..b9d743d 100644 --- a/mbr/Makefile +++ b/mbr/Makefile @@ -17,7 +17,7 @@ topdir = .. include $(topdir)/MCONFIG.embedded -all: mbr.bin gptmbr.bin

On Sat, Nov 22, 2014 at 10:39 AM, Martin Str|mberg <ams at ludd.ltu.se> wrote: > Hello. > > Use the z size specifier to printf-ing size_t variables to get rid of gcc > warning > format ?%08x? expects type ?unsigned int?, but argument 2 has type ?long unsigned int? Please, add the signed-off line. > > > -- > MartinS > > diff --git