CBIT
#define ISCBIT(x) ((x) & CBIT)
#define SETCBIT(x) ((x) |= CBIT)
#define CLRCBIT(x) ((x) &= ~CBIT)
RBYTE(wch[0])) | CBIT | a;
*wcp++ = RBYTE(wch[0]) | CBIT | a;
*wcp++ = (CBIT|MBIT) | a;
win->_y[y][x] &= ~CBIT;
RBYTE(mbbuf[mp + 1]) << 8) | CBIT;
CBIT;
nbkgd = (nbkgdc & ~CBIT) | nbkgda;
(LBYTE(variables[i])|MBIT)) | CBIT;
variables[i] &= ~CBIT;