void
scld_dec_write( libspectrum_word port GCC_UNUSED, libspectrum_byte b )
{
scld old_dec = scld_last_dec;
scld new_dec;
libspectrum_byte ink,paper;
/* We use new_dec as we don't want to have the new colours, modes etc.
to take effect until we have updated the critical region */
new_dec.byte = b;
/* If we changed the active screen, or change the colour in hires
* mode, update the critical region and mark the entire display file as
* dirty so we redraw it on the next pass */
if( new_dec.mask.scrnmode != old_dec.mask.scrnmode ||
new_dec.name.hires != old_dec.name.hires ||
( new_dec.name.hires &&
( new_dec.mask.hirescol != old_dec.mask.hirescol ) ) ) {
display_update_critical( 0, 0 );
display_refresh_main_screen();
}
/* Commit change to scld_last_dec */
scld_last_dec = new_dec;
/* If we just reenabled interrupts, check for a retriggered interrupt */
if( old_dec.name.intdisable && !scld_last_dec.name.intdisable )
z80_interrupt();
if( scld_last_dec.name.altmembank != old_dec.name.altmembank )
machine_current->memory_map();
display_parse_attr( hires_get_attr(), &ink, &paper );
display_set_hires_border( paper );
}
/* Get the attribute byte or equivalent for the eight pixels starting at
( (8*x) , y ) */
static inline libspectrum_byte
display_get_attr_byte( int x, int y )
{
libspectrum_byte attr;
if ( scld_last_dec.name.hires ) {
attr = hires_get_attr();
} else {
libspectrum_word offset;
if( scld_last_dec.name.b1 ) {
offset = display_line_start[y] + x + ALTDFILE_OFFSET;
} else if( scld_last_dec.name.altdfile ) {
offset = display_attr_start[y] + x + ALTDFILE_OFFSET;
} else {
offset = display_attr_start[y] + x;
}
attr = RAM[ memory_current_screen ][ offset ];
}
return attr;
}
