delta/syslinux.git/memdisk, branch syslinux-3.83-pre7 git.kernel.org: pub/scm/boot/syslinux/syslinux.git MEMDISK: generate map files 2009-08-18T02:06:01+00:00 H. Peter Anvin hpa@zytor.com 2009-08-18T02:06:01+00:00 565c1d8c67289d8df1b16eea1e325d86385d90fb Generate map files to make debugging less painful. Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
Generate map files to make debugging less painful.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
memdisk: make the stack size configurable 2009-08-18T00:30:40+00:00 H. Peter Anvin hpa@zytor.com 2009-08-17T02:51:38+00:00 f3b1b1b7d183aaef287c74c397507fc34b355e99 Make it possible to configure the stack size on the command line, so that we can rule that out in case of problems. Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
Make it possible to configure the stack size on the command line,
so that we can rule that out in case of problems.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
memdisk: remove unnecessary %ifdef 2009-08-02T18:59:03+00:00 H. Peter Anvin hpa@zytor.com 2009-08-02T18:59:03+00:00 386255cf3c6519926abafd3760f504115519928b Remove an %ifdef that the macros take care of anyway. 
Remove an %ifdef that the macros take care of anyway.
memdisk: don't set CX:DX for INT 13h AH=15h for floppies 2009-08-02T18:56:38+00:00 H. Peter Anvin hpa@zytor.com 2009-08-02T18:56:38+00:00 32598725b8d1941899bc700b5d71efa57c3f419c Win98SE DOS apparently hangs if INT 13h, AH=15h returns the capacity in CX:DX for floppies... *unless* EDD is enabled. Confused yet? This patch also adds some more tracing framework. Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
Win98SE DOS apparently hangs if INT 13h, AH=15h returns the capacity
in CX:DX for floppies... *unless* EDD is enabled.  Confused yet?

This patch also adds some more tracing framework.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
MEMDISK: additional EDD DPT Fields 2009-08-02T18:12:24+00:00 Miller, Shao Shao.Miller@yrdsb.edu.on.ca 2009-08-02T05:33:36+00:00 d655fa0bc3a9d817df253d4f67bb92da20ef741a We incorrectly used "equ" instead of "dd" (or "db") for strings in memdisk.inc. Oops! My mistake in my 'freedos' branch. Silly mistake. - Shao 
We incorrectly used "equ" instead of "dd" (or "db") for strings in
memdisk.inc.  Oops!  My mistake in my 'freedos' branch.  Silly
mistake.  - Shao
memdisk: correct the types for the EDD DPT, and write a real one 2009-07-31T15:27:58+00:00 H. Peter Anvin hpa@zytor.com 2009-07-31T15:27:58+00:00 41909771e1bafa89f316d3cd75d3b3be4c9e56be Fix the sizes of some of the fields in the EDD DPT. Write a real one to the best of our ability. Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
Fix the sizes of some of the fields in the EDD DPT.  Write a real one
to the best of our ability.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
memdisk: don't write the EDD DPT unless we are in EDD mode... 2009-07-31T15:24:27+00:00 H. Peter Anvin hpa@zytor.com 2009-07-31T15:24:27+00:00 a243241a43b48a7cf0fbe47e54851bd8f2c2023e Don't write the EDD DPT unless we're actually in EDD mode! Otherwise we end up corrupting memory beyond the defined code. This was the reason 5ca2764460883f5e9a5bd83db00f242ea1272e33 worked, by moving variables out of the corruption zone. Debugged-by: Shao Miller <Shao.Miller@yrdsb.edu.on.ca> Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
Don't write the EDD DPT unless we're actually in EDD mode!  Otherwise
we end up corrupting memory beyond the defined code.  This was the
reason 5ca2764460883f5e9a5bd83db00f242ea1272e33 worked, by moving
variables out of the corruption zone.

Debugged-by: Shao Miller <Shao.Miller@yrdsb.edu.on.ca>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
[memdisk] Additional EDD Device Parameter Table fields 2009-07-31T05:27:05+00:00 Shao Miller shao.miller@yrdsb.edu.on.ca 2009-07-31T05:27:05+00:00 76906786a0e17af1a10eecd50e86f1173d885712 Some additional fields from the EDD-4 spec. draft for the Device Parameter Table have been added into the structure in setup.c and memdisk.inc. These were added in the hopes of resolving a FreeDOS MEMDISK bug on IBM ThinkPads. 
Some additional fields from the EDD-4 spec. draft for the Device Parameter
Table have been added into the structure in setup.c and memdisk.inc.  These
were added in the hopes of resolving a FreeDOS MEMDISK bug on IBM ThinkPads.
memdisk: move temporary variables away from the EDD data block 2009-07-30T19:28:45+00:00 H. Peter Anvin hpa@zytor.com 2009-07-30T19:28:45+00:00 5ca2764460883f5e9a5bd83db00f242ea1272e33 Move a couple of variables away from the EDD data block. Without this change, FreeDOS doesn't boot on Thinkpads. Unfortunately, this should have been a null change, so it is really not clear why this happens. Stack overflows have been ruled out. Probably need to examine the FreeDOS kernel in some detail. Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
Move a couple of variables away from the EDD data block.  Without this
change, FreeDOS doesn't boot on Thinkpads.  Unfortunately, this should
have been a null change, so it is really not clear why this happens.
Stack overflows have been ruled out.  Probably need to examine the
FreeDOS kernel in some detail.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
memdisk: handle recursive INT 13h invocation 2009-07-30T18:24:25+00:00 H. Peter Anvin hpa@zytor.com 2009-07-30T18:24:25+00:00 44bc900a31b8c83a4de92c45e0401ceaefe371e8 Some systems, e.g. a lot of Thinkpads, invoke INT 13h recursively from within the stack itself. This is generally a bad idea as it re-runs any INT 13h hooks (including the ones that DOS installs!), but it should work. Keep a counter of recursive invocations and simply bypass the whole system including the DL shift if the invocation is recursive. With this, MS-DOS boots on a Thinkpad T61. FreeDOS is still broken, though, but apparently in a different manner... Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
Some systems, e.g. a lot of Thinkpads, invoke INT 13h recursively from
within the stack itself.  This is generally a bad idea as it re-runs
any INT 13h hooks (including the ones that DOS installs!), but it
should work.  Keep a counter of recursive invocations and simply
bypass the whole system including the DL shift if the invocation is
recursive.

With this, MS-DOS boots on a Thinkpad T61.  FreeDOS is still broken,
though, but apparently in a different manner...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>