static void videoPutChar( char ch )
{
switch ( ch ) {
case '\b': {
if ( column )
column--;
/* Move cursor on the previous location */
wr_cursor( row, column );
return;
}
case '\t': {
int i;
i = TAB_SPACE - ( column & ( TAB_SPACE - 1 ) );
while ( i-- ) {
video_drawchars( row, column, ' ' );
column += 1;
if ( column >= maxCol ) {
doCRNL( 1, 1 );
return;
}
}
wr_cursor( row, column );
return;
}
case '\n': {
doCRNL( 0, 1 );
return;
}
case 7: { /* Bell code must be inserted here */
return;
}
case '\r': {
doCRNL( 1, 0 );
return;
}
case BLANK: {
video_drawchars( row, column, ' ' );
wr_cursor( row, column );
return;
}
default: {
// *pt_bitmap = (unsigned char)ch | attribute;
video_drawchars( row, column, ch );
advanceCursor();
return;
}
}
}
static void
videoPutChar(char car)
{
unsigned short *pt_bitmap = bitMapBaseAddr + row * maxCol + column;
switch (car) {
case '\b': {
if (column) column--;
/* Move cursor on the previous location */
wr_cursor(row * maxCol + column, ioCrtBaseAddr);
return;
}
case '\t': {
int i;
i = TAB_SPACE - (column & (TAB_SPACE - 1));
column += i;
if (column >= maxCol) {
doCRNL(1,1);
return;
}
while (i--) *pt_bitmap++ = ' ' | attribute;
wr_cursor(row * maxCol + column, ioCrtBaseAddr);
return;
}
case '\n': {
doCRNL(0,1);
return;
}
case 7: { /* Bell code must be inserted here */
return;
}
case '\r' : {
doCRNL(1,0);
return;
}
case BLANK: {
*pt_bitmap = ' ' | attribute;
/* DONT move the cursor... */
return;
}
default: {
*pt_bitmap = (unsigned char)car | attribute;
advanceCursor();
return;
}
}
}
static void advanceCursor( void )
{
if ( ++column == maxCol )
doCRNL( 1, 1 );
else
wr_cursor( row, column );
}
static void
gotorc(int r, int c)
{
column = c;
row = r;
wr_cursor(row * maxCol + column, ioCrtBaseAddr);
}
static void
advanceCursor(void)
{
if (++column == maxCol)
doCRNL(1,1);
else
wr_cursor(row * maxCol + column, ioCrtBaseAddr);
}
static void gotorc(
int r,
int c
)
{
column = c;
row = r;
wr_cursor( row, column );
}
static void
doCRNL(int cr, int nl)
{
if (nl) {
if (++row == maxRow) {
scroll(); /* Scroll the screen now */
row = maxRow - 1;
}
nLines++;
}
if (cr)
column = 0;
/* Move cursor on the next location */
if (cr || nl)
wr_cursor(row * maxCol + column, ioCrtBaseAddr);
}