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/* Copyright 1998-2002 (c) by Salvador Eduardo Tropea
This code is part of the port of Turbo Vision to gcc, please see the rest
of the file for copying information.
*/
#if defined(TVCompf_djgpp) && !defined(VGAREGS_HEADER_INCLUDED)
#define VGAREGS_HEADER_INCLUDED
#include <pc.h>
/* CRT (Cathode Rays Tube) Controller Registers
They control the sync signals.
0x00 to 0x18 */
// SVGALib and XFree86 uses <0x18 so they miss the line compare register,
// don't know why.
#define CRTbase 0
#define CRTcant 25
/* ATT Attribute Controller Registers
They control some attributes like 16 colors palette, overscan color, etc.
0x00 to 0x14 */
#define ATTbase (CRTbase+CRTcant)
#define ATTcant 21
/* GRA Graphics Controller Registers
They control the read/write mode to the video memory.
0x00 to 0x08 */
#define GRAbase (ATTbase+ATTcant)
#define GRAcant 9
/* SEQ Sequence Registers
They control how the memory is scanned.
0x00 to 0x04 */
#define SEQbase (GRAbase+GRAcant)
#define SEQcant 5
/* MOR Miscellaneous Output Register
1 register */
#define MORbase (SEQbase+SEQcant)
#define MORcant 1
#define VGARegsCant (MORbase+MORcant)
/* (I don't take care about mono by now) */
/* VGA Atttibute controller */
#define ATTindex 0x3C0
#define ATTdataW 0x3C0
#define ATTdataR 0x3C1
#define ATTdir 0x3DA
/* Miscellaneous Output Register */
#define MORdataW 0x3C2
#define MORdataR 0x3CC
/* VGA Sequencer Registers */
#define Sequencer 0x3C4
#define SequencerIndex 0x3C4
#define SequencerData 0x3C5
/* VGA Palette Registers */
#define ReadDataAddress 0x3C7
#define WriteDataAddress 0x3C8
#define PaletteDataRegister 0x3C9
/* VGA Graphics Controller Registers */
#define GraphicsController 0x3CE
#define GraphicsControllerIndex 0x3CE
#define GraphicsControllerData 0x3CF
/* VGA CRT Controller Register */
#define CRTController 0x3D4
#define CRTControllerIndex 0x3D4
#define CRTControllerData 0x3D5
/* VGA Input Status Register 1 */
#define InputStatusRegister1 0x3DA
/* Trident's DAC/Clock */
#define EDACindex 0x83C8
#define EDACdata 0x83C6
#if __GNUC__<3
// GCC 3.0 doesn't support it for local variables.
// But takes the right way.
#define RegEAX asm("%eax")
#else
#define RegEAX
#endif
#ifndef NO_INLINE
//#define SAFE_IO
#ifdef SAFE_IO
/* C approach, safier than my assembler ;-) */
extern inline
uchar ReadCRT(uchar index)
{
outportb(CRTControllerIndex,index);
return inportb(CRTControllerData);
}
extern inline
uchar ReadGRA(uchar index)
{
outportb(GraphicsControllerIndex,index);
return inportb(GraphicsControllerData);
}
extern inline
uchar ReadSEQ(uchar index)
{
outportb(SequencerIndex,index);
return inportb(SequencerData);
}
extern inline
void WriteCRT(uchar index, uchar value)
{
outportb(CRTControllerIndex,index);
outportb(CRTControllerData,value);
}
extern inline
void WriteGRA(uchar index, uchar value)
{
outportb(GraphicsControllerIndex,index);
outportb(GraphicsControllerData,value);
}
extern inline
void WriteSEQ(uchar index, uchar value)
{
outportb(SequencerIndex,index);
outportb(SequencerData,value);
}
extern inline
void WaitVRT()
{
while (inportb(InputStatusRegister1) & 8);
while (!(inportb(InputStatusRegister1) & 8));
}
#else
/*
Assembler stuff: It is normally more compact and in some cases faster. As
the functions are inline I think size is important.
They save 524 bytes in the driver (1.89%).
*/
extern inline
uchar ReadCRT(uchar index)
{
int dummy;
uchar a RegEAX;
a=index;
asm volatile (
" outb %%al,%%dx \n"
" incl %%edx \n"
" inb %%dx,%%al \n"
: "=a" (a), "=d" (dummy) : "a" (a), "d" (CRTController));
return a;
}
extern inline
uchar ReadGRA(uchar index)
{
int dummy;
uchar a RegEAX;
a=index;
asm volatile (
" outb %%al,%%dx \n"
" incl %%edx \n"
" inb %%dx,%%al \n"
: "=a" (a), "=d" (dummy) : "a" (a), "d" (GraphicsController));
return a;
}
extern inline
uchar ReadSEQ(uchar index)
{
int dummy;
uchar a RegEAX;
a=index;
asm volatile (
" outb %%al,%%dx \n"
" incl %%edx \n"
" inb %%dx,%%al \n"
: "=a" (a), "=d" (dummy) : "a" (a), "d" (Sequencer));
return a;
}
extern inline
void WriteCRT(uchar index, uchar value)
{
int dummy;
asm volatile (
" movb %1,%%ah \n"
" outw %%ax,%%dx \n"
: "=a" (dummy) : "qi" (value), "a" (index), "d" (CRTController));
}
extern inline
void WriteGRA(uchar index, uchar value)
{
int dummy;
asm volatile (
" movb %1,%%ah \n"
" outw %%ax,%%dx \n"
: "=a" (dummy) : "qi" (value), "a" (index), "d" (GraphicsController));
}
extern inline
void WriteSEQ(uchar index, uchar value)
{
int dummy;
asm volatile (
" movb %1,%%ah \n"
" outw %%ax,%%dx \n"
: "=a" (dummy) : "qi" (value), "a" (index), "d" (Sequencer));
}
extern inline
void WaitVRT()
{
asm volatile(
" 1: \n"
" inb %%dx,%%al \n"
" testb $8,%%al \n"
" jne 1b \n"
" .align 2,0x90 \n"
" 2: \n"
" inb %%dx,%%al \n"
" testb $8,%%al \n"
" je 2b \n"
: : "d" (InputStatusRegister1) : "%eax" );
}
#endif
extern inline
uchar ReadATT(int index)
{
/* Ensure we will write to the index */
inportb(ATTdir);
/* Set the index and disable the screen or we will read nothing */
outportb(ATTindex,index);
return inportb(ATTdataR);
}
extern inline
void ATTEndReads(void)
{
/* Ensure we will write to the index */
inportb(ATTdir);
/* Enable the screen */
outportb(ATTindex,0x20);
}
extern inline
void WriteATT(int index, int val)
{
outportb(ATTindex,index);
outportb(ATTdataW,val);
}
extern inline
uchar ReadMOR(void)
{
return inportb(MORdataR);
}
extern inline
void WriteMOR(int val)
{
outportb(MORdataW,val);
}
extern inline
uchar ReadEDAC(int index)
{
outportb(EDACindex,index);
return inportb(EDACdata);
}
extern inline
void WriteEDAC(int index, int val)
{
outportb(EDACindex,index);
outportb(EDACdata,val);
}
extern inline
void RPF_SetPalRange(unsigned char *_pal_ptr, int color, int cant)
{
int dummy1,dummy2,dummy3,dummy4;
asm volatile (
" outb %%al,%%dx \n"
" incl %%edx \n"
" cli \n"
" rep \n"
" outsb \n"
" sti \n"
: "=a" (dummy1), "=d" (dummy2), "=S" (dummy3), "=c" (dummy4)
: "c" (cant*3), "S" (_pal_ptr), "a" (color), "d" (0x3C8)
);
}
extern inline
void RPF_GetPalRange(unsigned char *_pal_ptr, int color, int cant)
{
int dummy1,dummy2,dummy3,dummy4;
asm volatile (
" outb %%al,%%dx \n"
" addl $2,%%edx \n"
" cli \n"
" rep \n"
" insb \n"
" sti \n"
: "=a" (dummy1), "=d" (dummy2), "=D" (dummy3), "=c" (dummy4)
: "c" (cant*3), "D" (_pal_ptr), "a" (color), "d" (0x3C7)
);
}
#endif // NO_INLINE
#endif // defined(TVCompf_djgpp) && !defined(VGAREGS_HEADER_INCLUDED)
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