delta/syslinux.git/memdisk/setup.c, branch thread

memdisk: make the stack size configurable

2009-08-18T00:30:40+00:00

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

memdisk: don't set CX:DX for INT 13h AH=15h for floppies

2009-08-02T18:56:38+00:00

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

memdisk: correct the types for the EDD DPT, and write a real one

2009-07-31T15:27:58+00:00

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

memdisk: don't write the EDD DPT unless we are in EDD mode...

2009-07-31T15:24:27+00:00

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 
Signed-off-by: H. Peter Anvin

[memdisk] Additional EDD Device Parameter Table fields

2009-07-31T05:27:05+00:00

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: additional cleanups

2009-06-08T03:59:52+00:00

Additional stylistic cleanups.  Rename "syscall" to "intcall" (we
can't call it __intcall without clashing with com32.h); use macros
instead of copying variables to different places with only the type
being different.

Also, only change the rm/pm jump instructions when actually relocating
the code.

Signed-off-by: H. Peter Anvin

memdisk: minor cleanups

2009-06-08T01:46:59+00:00

Minor cleanups to the source base; make die() also print an error
message and move die() into conio.c.

Signed-off-by: H. Peter Anvin

memdisk: relocate real-mode code before booting

2009-06-08T01:25:09+00:00

Relocate the real-mode code before booting.  This allows the target
bootstrap to be loaded at an arbitrary address, not necessarily
0x7c00, and to be almost arbitrarily long.

Add some initial infrastructure for other bootstrap addresses, too.

Signed-off-by: H. Peter Anvin

memdisk: move rm_args initialization to C code; export rm_size

2009-06-08T00:13:58+00:00

Move the rm_args initialization (and the associated sti) to C code.
Export the total size of the real-mode code to the protected-mode
code.

Signed-off-by: H. Peter Anvin

memdisk: remove hard-coded assumptions for a specific RM segment

2009-06-08T00:04:03+00:00

Remove some hard-coded assumptions about having an RM segment at a
specific location.  This should allow us to relocate the RM code once
the PM code knows where DOS free memory ends.  This in turn allows the
PM code to load the boot sector almost anywhere it wants to go in low
memory, as is required for 100% compliant El Torito support.

Signed-off-by: H. Peter Anvin