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Support for setting linear frame buffer base.

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New way of setting up vga read/write handler or frame buffer.
No longer use HostPt memory for certain video modes.


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1122
This commit is contained in:
Sjoerd van der Berg 2003-07-14 08:39:40 +00:00
parent 74676d9bb7
commit 4d26f08a37
5 changed files with 76 additions and 62 deletions
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15
src/hardware/vga.h
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@ -48,6 +48,10 @@ enum VGAModes {
#define MH_SETRESET 0x0002;
#define MH_BITMASK 0x0004;
typedef Bit8u VGA_ReadHandler(PhysPt off);
typedef void VGA_WriteHandler(PhysPt off,Bit8u val);
typedef struct {
bool attrindex;
} VGA_Internal;
@ -78,7 +82,10 @@ typedef struct {
Bit8u bytes_skip;
/* Specific stuff memory write/read handling */
PhysPt mem_base;
VGA_ReadHandler * readhandler;
VGA_WriteHandler * writehandler;
Bit8u read_mode;
Bit8u write_mode;
Bit8u read_map_select;
@ -128,6 +135,7 @@ typedef struct {
Bit8u reg_55;
Bit8u ex_hor_overflow;
Bit8u ex_ver_overflow;
Bit16u la_window;
struct {
Bit8u r;
Bit8u n;
@ -262,13 +270,15 @@ typedef struct {
VGA_Memory mem;
} VGA_Type;
/* Functions for different resolutions */
void VGA_SetMode(VGAModes mode);
void VGA_SetupHandlers(void);
void VGA_StartResize(void);
void VGA_SetupDrawing(void);
/* Some support functions */
/* Some DAC/Attribute functions */
void VGA_DAC_CombineColor(Bit8u attr,Bit8u pal);
void VGA_ATTR_SetPalette(Bit8u index,Bit8u val);
@ -285,6 +295,7 @@ void VGA_SetupSEQ(void);
void VGA_SetClock(Bitu which,Bitu target);
void VGA_DACSetEntirePalette(void);
void VGA_StartRetrace(void);
void VGA_StartUpdateLFB(void);
extern VGA_Type vga;