void mem(struct multiboot_info* mbt)
{
char *clear_screen = " ";
int len = (int)mbt->mmap_length;
unsigned long x = 0, mem=0;
char *welcome = "Welcome to FIFOS: The System memory is: ";
char *mb=" MB";
memory_map_t* mmap = (memory_map_t*)mbt->mmap_addr;
while(mmap <(mbt->mmap_addr + len))
{
if(mmap->type == 1)
{
x = mmap->length_low;
mem = mem + x;
}
mmap = (memory_map_t*) ( (unsigned int)mmap + mmap->size + sizeof(unsigned int) );
}
mem = mem>>20;
pos_x=0;
pos_y=0;
//clearing the screen before writing on it
while(1)
{
WriteCharacter(clear_screen);
if(pos_y>25)
break;
}
//resetting the cursor value
pos_x=0;
pos_y=0;
//printing the welcome message
WriteCharacter(welcome);
//printing the amount of free memory
print_num (mem);
//printing the unit of the free system memory
WriteCharacter(mb);
pos_y ++;
pos_x = 0;
return;
}
void TUnicodeCompressor::WriteCharacterFromBuffer()
{
const TAction& action = iInputBuffer[iInputBufferStart];
iInputBufferSize--;
iInputBufferStart = (iInputBufferStart + 1) % EMaxInputBufferSize;
WriteCharacter(action);
}
void MIDIFileWrite::WriteShort( unsigned short c )
{
ENTER( "void MIDIFileWrite::WriteShort()" );
WriteCharacter( (unsigned char)((c>>8)&0xff) );
WriteCharacter( (unsigned char)((c&0xff)) );
}
void gdt_done()
{
char *gdt = "GDT initialised...";
WriteCharacter(gdt);
return;
}
void MIDIFileWrite::Write3Char( long c )
{
ENTER( "void MIDIFileWrite::Write3Char()" );
WriteCharacter( (unsigned char)((c>>16)&0xff) );
WriteCharacter( (unsigned char)((c>>8)&0xff) );
WriteCharacter( (unsigned char)((c&0xff)) );
}
void WriteString(char *str, unsigned int x, unsigned int y)
{
// int i;
for(int i=0; i < strlen(str); i++)
{
WriteCharacter(str[i], x+i, y);
}
}
void MIDIFileWrite::WriteTrackHeader( unsigned long length )
{
ENTER( "void MIDIFileWrite::WriteTrackHeader()" );
track_position=file_length;
track_length=0;
track_time=0;
running_status=0;
WriteCharacter( (unsigned char) 'M' );
WriteCharacter( (unsigned char) 'T' );
WriteCharacter( (unsigned char) 'r' );
WriteCharacter( (unsigned char) 'k' );
WriteLong( length );
file_length+=8;
within_track=true;
}
void MIDIFileWrite::WriteFileHeader(
int format,
int ntrks,
int division
)
{
ENTER( "void MIDIFileWrite::WriteFileHeader()" );
WriteCharacter( (unsigned char) 'M' );
WriteCharacter( (unsigned char) 'T' );
WriteCharacter( (unsigned char) 'h' );
WriteCharacter( (unsigned char) 'd' );
WriteLong( 6 );
WriteShort( (short)format );
WriteShort( (short)ntrks );
WriteShort( (short)division );
file_length=4+4+6;
}
void print_num(unsigned long mem)
{
int j=0,n[10],m;
char *ch="";
while(mem>0)
{
n[j] = mem%10;
mem = mem/10;
j++;
}
for(m=j-1;m>=0;m--)
{
*ch = n[m] + '0';
WriteCharacter(ch);
//pos_x= pos_x -2;
}
pos_x = 0;
pos_y +=1;
return;
}
int MIDIFileWrite::WriteVariableNum( unsigned long n )
{
ENTER( "short MIDIFileWrite::WriteVariableNum()" );
register unsigned long buffer;
short cnt=0;
buffer=n&0x7f;
while( (n>>=7) > 0)
{
buffer <<=8;
buffer|=0x80;
buffer+=(n&0x7f);
}
while( true )
{
WriteCharacter( (unsigned char) (buffer&0xff) );
cnt++;
if( buffer&0x80 )
buffer>>=8;
else
break;
}
void Int10Handler(struct Registers * registers)
{
//Call the function for this function code
switch(registers->r_ax.b.h)
{
//int 0x10/ah=0x00: Set video mode
case 0x00:
SetMode(registers);
break;
//int 0x10/ah=0x01: Set text mode cursor shape - Unimplemented
case 0x01:
break;
//int 0x10/ah=0x02: Set cursor position
case 0x02:
SetCursorPos(registers->r_dx.b.l, registers->r_dx.b.h);
break;
//int 0x10/ah=0x03: Get cursor position and size
//TODO: Cursor size
case 0x03:
registers->r_dx.w = *(Word far *)MK_FP(BDA_SEG, BDA_CURSOR_X);
break;
//int 0x10/ah=0x05: Set active display page - Unimplemented
case 0x05:
break;
//int 0x10/ah=0x06: Scroll up window
case 0x06:
ScrollUpWindow(registers);
break;
//int 0x10/ah=0x07: Scroll down window
case 0x07:
ScrollDownWindow(registers);
break;
//int 0x10/ah=0x08: Read character and attribute
case 0x08:
ReadCharacterAndAttribute(registers);
break;
//int 0x10/ah=0x09: Write character and attribute
case 0x09:
{
Word i;
for(i = 0; i < registers->r_cx.w; ++i)
WriteCharacter(registers->r_ax.b.l, TRUE, registers->r_bx.b.l);
}
break;
//int 0x10/ah=0x0a: Write character
case 0x0a:
{
Word i;
for(i = 0; i < registers->r_cx.w; ++i)
WriteCharacter(registers->r_ax.b.l, FALSE, 0x00);
}
break;
//int 0x10/ah=0x0b: Function selected by bh - None implemented
case 0x0b:
break;
//int 0x10/ah=0x0e: Teletype output
case 0x0e:
WriteCharacter(registers->r_ax.b.l, FALSE, 0x00);
break;
//int 0x10/ah=0x0f: Get current video mode
case 0x0f:
registers->r_ax.b.h = 0x50; //AH: Number of character columns - TODO
registers->r_ax.b.l = *(Byte far *)MK_FP(BDA_SEG, BDA_VIDEO_MODE); //AL: Video mode
break;
//int 0x10/ah=0x10: Function selected by al
case 0x10:
switch(registers->r_ax.b.l)
{
//int 0x10/ax=0x1000: Set palette register
case 0x00:
{
Word ioPortBase = *(Word far *)MK_FP(BDA_SEG, BDA_VGA_IO_PORT_BASE);
inportb(ioPortBase + 6);
outportb(0x3c0, registers->r_bx.b.l);
outportb(0x3c0, registers->r_bx.b.h);
}
break;
//int 0x10/ax=0x1001: Set border color - Not supported
case 0x01:
break;
//int 0x10/ax=0x1002: Set all palette registers
case 0x02:
SetAllPaletteRegisters(registers);
break;
//int 0x10/ax=0x1003: Toggle intensity/blinking bit
case 0x03:
ToggleBlinking(registers->r_bx.b.l);
break;
//int 0x10/ax=0x1010: Set color register
case 0x10:
outportb(0x03c8, registers->r_bx.b.l);
outportb(0x03c9, registers->r_cx.b.h);
outportb(0x03c9, registers->r_cx.b.l);
outportb(0x03c9, registers->r_dx.b.h);
break;
//int 0x10/ax=0x1012: Set block of color registers
case 0x12:
SetColorRegisters(registers);
break;
}
break;
//int 0x10/ah=0x11: Character generator functions - Unimplemented
case 0x11:
break;
//int 0x10/ah=0x12: Alternate function select, selected by bl
case 0x12:
switch(registers->r_bx.b.l)
{
//int 0x10/ah=0x12/bl=0x10: Get EGA info
case 0x10:
registers->r_ax.b.l = 0x03; //AL: Unknown
//BH: Color/Mono mode in effect
registers->r_bx.b.h =
(*(Word far *)MK_FP(BDA_SEG, BDA_VGA_IO_PORT_BASE) == 0x3d4) ? 0x00 : 0x01;
registers->r_bx.b.l = 0x03; //BL: 256K memory installed
registers->r_cx.b.h = 0x00; //CH: Feature connector bits
registers->r_cx.b.l = 0x09; //CL: Switch settings
break;
}
break;
//int 0x10/ah=0x1a: Display combination code functions, selected by al
case 0x1a:
switch(registers->r_ax.b.l)
{
//int 0x10/ax=0x1a00: Get display combination code
case 0x00:
registers->r_bx.w = *(Word far *)MK_FP(EBDA_SEG, EBDA_DISPLAY_CODE);
//Return "function supported"
registers->r_ax.b.l = 0x1a;
break;
//int 0x10/ax=0x1a01: Set display combination code
case 0x01:
*(Word far *)MK_FP(EBDA_SEG, EBDA_DISPLAY_CODE) = registers->r_bx.w;
//Return "function supported"
registers->r_ax.b.l = 0x1a;
break;
}
break;
//int 0x10/ah=0x1b: Functionality/state information - Unimplemented
case 0x1b:
break;
//int 0x10/ah=0x4f: VESA VBE functions - Unimplemented
case 0x4f:
break;
//int 0x10/ah=0x6f: Video7 VGA functions, selected by al - None supported
case 0x6f:
break;
}
}