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/* Copyright 2000 (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.
*/
/*
This module provides the functions declared inline in vgaregs.h.
They are needed only if you compile without optimizations.
*/
#include <tv/configtv.h>
#define NO_INLINE
typedef unsigned char uchar;
typedef unsigned short ushort;
#include "vgaregs.h"
#ifdef TVCompf_djgpp
#ifdef SAFE_IO
/* C approach, safier than my assembler ;-) */
uchar ReadCRT(uchar index)
{
outportb(CRTControllerIndex,index);
return inportb(CRTControllerData);
}
uchar ReadGRA(uchar index)
{
outportb(GraphicsControllerIndex,index);
return inportb(GraphicsControllerData);
}
uchar ReadSEQ(uchar index)
{
outportb(SequencerIndex,index);
return inportb(SequencerData);
}
void WriteCRT(uchar index, uchar value)
{
outportb(CRTControllerIndex,index);
outportb(CRTControllerData,value);
}
void WriteGRA(uchar index, uchar value)
{
outportb(GraphicsControllerIndex,index);
outportb(GraphicsControllerData,value);
}
void WriteSEQ(uchar index, uchar value)
{
outportb(SequencerIndex,index);
outportb(SequencerData,value);
}
void WaitVRT()
{
while (inportb(InputStatusRegister1) & 8);
while (!(inportb(InputStatusRegister1) & 8));
}
#else
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;
}
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;
}
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;
}
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));
}
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));
}
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));
}
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
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);
}
void ATTEndReads(void)
{
/* Ensure we will write to the index */
inportb(ATTdir);
/* Enable the screen */
outportb(ATTindex,0x20);
}
void WriteATT(int index, int val)
{
outportb(ATTindex,index);
outportb(ATTdataW,val);
}
uchar ReadMOR(void)
{
return inportb(MORdataR);
}
void WriteMOR(int val)
{
outportb(MORdataW,val);
}
uchar ReadEDAC(int index)
{
outportb(EDACindex,index);
return inportb(EDACdata);
}
void WriteEDAC(int index, int val)
{
outportb(EDACindex,index);
outportb(EDACdata,val);
}
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)
);
}
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 // DJGPP
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