similar to: Bug#857597: "isolinux.bin missing or corrupt" when booting USB flash drive in old PC

Thomas Schmitt wrote: > (I could need a reference document for the assembler language in isohdpfx.S. > Does anybody know a good one ?) "info gas", in particular you want to read the chapter named "i386-Dependent". Then you'd want the x86 manuals from amd or intel for the instructions themselves but they are documented backwards. -- MartinS

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, 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

CC:ing syslinux David Christensen reports that my latest isohdpfd.bin reported C, thus it failed early (carry set) in finding an EBIOS. My interpretation is that it must corrupt CX so isolinux is fooled into trying EBIOS first. So, again David, can you please try this one: <http://www.ludd.ltu.se/~ams/tmp/isodavid.tgz> To keep your (our?) spirits up I've named it of you. It

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

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

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> To: Syslinux commits mailing list <syslinux-commits at zytor.com> Cc: ams at ludd.ltu.se Subject: [syslinux:master] mbr/isohdpfx.S: correct pointer for heads/sectors

CC:ing syslinux. Thanks for testing David. On Thu, Mar 23, 2017 at 05:23:51PM -0700, David Christensen wrote: > Trying isohdpfd.bin: ... > Boot it in D865GBFLK Pentium 4 3.4E GHz -- I see a screenful of information, > with "Key?" at the bottom (see attached picture IMG_1578-r.JPG). > > > When I press a key, I see the following message at the bottom and the >

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 /*

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

> 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

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:

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 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

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

David Christensen wrote: > It looks like the call to "error" (line 276) is made if a summation of > the bytes in the first four sectors of a partition don't add up to > HYBRID_MAGIC (?). HYBRID_MAGIC = 0x7078c0fb isolinux_hybrid_signature = 0x7c00+64 ... cmpl $HYBRID_MAGIC,(isolinux_hybrid_signature) jne bad_signature ... bad_signature: call error .ascii

David Christensen wrote: > What syntax is used in isohdpfx.S -- it doesn't match my Intel gas syntax. "info gas machine i386 i386-syn i386-var" if you have the gas manual installed. -- MartinS

On 03/19/2017 09:42 PM, Martin Str|mberg via Syslinux wrote: > David Christensen wrote: >> This is how I prepared an ADATA USB Flash Drive 4 GB: > ... > install-mbr /dev/sdb > ... > [Rest of very clear description snipped.] > > What's that? That desn't exist in the Debian I'm running. > Otherwise you gave a very good description of what you're doing.

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. >>