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wine
wine-winehq
Commits
872f9450
Commit
872f9450
authored
Dec 12, 2002
by
Jukka Heinonen
Committed by
Alexandre Julliard
Dec 12, 2002
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Give DOS applications 638k of free conventional memory.
parent
5f9e3ffd
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1 changed file
with
39 additions
and
5 deletions
+39
-5
dosmem.c
msdos/dosmem.c
+39
-5
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msdos/dosmem.c
View file @
872f9450
...
...
@@ -85,6 +85,11 @@ static char *DOSMEM_dosmem;
* and only relocated to NULL when absolutely necessary */
static
char
*
DOSMEM_sysmem
;
/* Start of DOS conventional memory */
static
char
*
DOSMEM_membase
;
static
void
DOSMEM_InitMemory
(
void
);
/***********************************************************************
* DOSMEM_MemoryTop
*
...
...
@@ -102,7 +107,36 @@ static char *DOSMEM_MemoryTop(void)
*/
static
dosmem_info
*
DOSMEM_InfoBlock
(
void
)
{
return
(
dosmem_info
*
)(
DOSMEM_dosmem
+
0x10000
);
/* 64K */
if
(
!
DOSMEM_membase
)
{
DWORD
reserve
;
/*
* Reserve either:
* - lowest 64k for NULL pointer catching (Win16)
* - lowest 1k for interrupt handlers and
* another 0.5k for BIOS, DOS and intra-application
* areas (DOS)
*/
if
(
DOSMEM_dosmem
!=
DOSMEM_sysmem
)
reserve
=
0x10000
;
/* 64k */
else
reserve
=
0x600
;
/* 1.5k */
/*
* Round to paragraph boundary in order to make
* sure the alignment is correct.
*/
reserve
=
((
reserve
+
15
)
>>
4
)
<<
4
;
/*
* Set DOS memory base and initialize conventional memory.
*/
DOSMEM_membase
=
DOSMEM_dosmem
+
reserve
;
DOSMEM_InitMemory
();
}
return
(
dosmem_info
*
)
DOSMEM_membase
;
}
/***********************************************************************
...
...
@@ -311,9 +345,6 @@ static void DOSMEM_FillBiosSegments(void)
*/
static
void
DOSMEM_InitMemory
(
void
)
{
/* Low 64Kb are reserved for DOS/BIOS so the useable area starts at
* 1000:0000 and ends at 9FFF:FFEF. */
dosmem_info
*
info_block
=
DOSMEM_InfoBlock
();
dosmem_entry
*
root_block
=
DOSMEM_RootBlock
();
dosmem_entry
*
dm
;
...
...
@@ -330,8 +361,12 @@ static void DOSMEM_InitMemory(void)
|
DM_BLOCK_DEBUG
#endif
;
TRACE
(
"DOS conventional memory initialized, %d bytes free.
\n
"
,
DOSMEM_Available
()
);
}
/**********************************************************************
* setup_dos_mem
*
...
...
@@ -403,7 +438,6 @@ BOOL DOSMEM_Init(BOOL dos_init)
0x10000
,
0
,
WINE_LDT_FLAGS_DATA
);
DOSMEM_FillBiosSegments
();
DOSMEM_FillIsrTable
();
DOSMEM_InitMemory
();
already_done
=
1
;
}
else
if
(
dos_init
&&
!
already_mapped
)
...
...
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