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add variable-size graphics memory, enable some more vga memory wrapping (vasyl)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3077
This commit is contained in:
Sebastian Strohhäcker 2008-01-12 17:37:48 +00:00
parent 056302a6a5
commit 50917251f4
10 changed files with 285 additions and 76 deletions
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18
include/vga.h
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: vga.h,v 1.37 2008-01-09 20:34:21 c2woody Exp $ */
/* $Id: vga.h,v 1.38 2008-01-12 17:36:48 c2woody Exp $ */
#ifndef DOSBOX_VGA_H
#define DOSBOX_VGA_H
@ -31,9 +31,6 @@
#define VGA_MEMORY (2*1024*1024)
#define VGA_CHANGE_SHIFT 9
//Offset inside VGA_MEMORY that will be used for certain types of caching
#define VGA_CACHE_OFFSET (512*1024)
class PageHandler;
@ -164,6 +161,7 @@ typedef struct {
Bit8u reg_lock2;
Bit8u reg_31;
Bit8u reg_35;
Bit8u reg_36; // RAM size
Bit8u reg_3a; // 4/8/doublepixel bit in there
Bit8u reg_40; // 8415/A functionality register
Bit8u reg_41; // BIOS flags
@ -330,11 +328,12 @@ typedef union {
typedef struct {
Bit8u* linear;
Bit8u* linear_orgptr;
} VGA_Memory;
typedef struct {
//Add a few more just to be safe
Bit8u map[(VGA_MEMORY >> VGA_CHANGE_SHIFT) + 32];
Bit8u* map; /* allocated dynamically: [(VGA_MEMORY >> VGA_CHANGE_SHIFT) + 32] */
Bit8u checkMask, frame, writeMask;
bool active;
Bit32u clearMask;
@ -370,6 +369,10 @@ typedef struct {
VGA_TANDY tandy;
VGA_OTHER other;
VGA_Memory mem;
Bit32u vmemwrap; /* this is assumed to be power of 2 */
Bit8u* fastmem; /* memory for fast (usually 16-color) rendering, always twice as big as vmemsize */
Bit8u* fastmem_orgptr;
Bit32u vmemsize;
#ifdef VGA_KEEP_CHANGES
VGA_Changes changes;
#endif
@ -394,7 +397,7 @@ void VGA_ATTR_SetPalette(Bit8u index,Bit8u val);
/* The VGA Subfunction startups */
void VGA_SetupAttr(void);
void VGA_SetupMemory(void);
void VGA_SetupMemory(Section* sec);
void VGA_SetupDAC(void);
void VGA_SetupCRTC(void);
void VGA_SetupMisc(void);
@ -472,6 +475,9 @@ void SVGA_Setup_TsengET3K(void);
void SVGA_Setup_ParadisePVGA1A(void);
void SVGA_Setup_Driver(void);
// Amount of video memory required for a mode, implemented in int10_modes.cpp
Bitu VideoModeMemSize(Bitu mode);
extern Bit32u ExpandTable[256];
extern Bit32u FillTable[16];
extern Bit32u CGA_2_Table[16];