IN: IX = filter handle OUT, if call successful: Fc = 0 IX = 0 BC = number of input characters written to filter (BC = 0 provided at least one character has been read) DE = number of characters read from filter OUT, if call failed: Fc = 1 A = error code: RC_HAND ($08), IX(in) was not a valid filter handle Registers changed after return: ......HL/..IY same AFBCDE../IX.. different |
GN_Flf, flush filter
GN_Flo, open filter
GN_Flr, read from filter
GN_Flw, write character to filter
GN_Fpb, push back into filter