src/bbcvdu.c
// SET graphics plotting mode & colour:
SET graphics plotting mode & colour.
SET graphics plotting mode & colour .
static void gcol (char al, signed char ah)
{
	al &= 7 ;
	if (al == 4)
		ah |= 0x7F ;		
	if (ah >= 0)
		forgnd = (((ah & colmsk) << 8) | dbrop[(int) al]) ;
	else
		bakgnd = (((ah & colmsk) << 8) | dbrop[(int) al]) ;
}
static void gcol ( char al , signed char ah ) { al &= 7 ; if ( al == 4 ) ah |= 0x7F ; if ( ah >= 0 ) forgnd = ( ( ( ah & colmsk ) << 8 ) | dbrop [ ( int ) al ] ) ; else bakgnd = ( ( ( ah & colmsk ) << 8 ) | dbrop [ ( int ) al ] ) ; }
SET graphics plotting mode & colour:
SET graphics plotting mode & colour :
// GCOL 4 - NOT