blitc
blitc(which_unit, (u_char)c);
blitc(unit, chr);
blitc(unit, chr);
blitc(unit, ' ');
blitc(unit, '\r');
blitc(unit, '\n');
blitc(0, (u_char)(chr & 0xff));
blitc(0, '\r');
void blitc(int, u_char);