IN: IX = filter handle A = character to write to filter OUT, if call successful: Fc = 0 A = A(in) OUT, if call failed: Fc = 1 A = error code: RC_HAND ($08), bad filter handle RC_FLF ($0A), filter is full Registers changed after return: A.BCDEHL/IXIY same .F....../.... different |
GN_Flc, close filter
GN_Flf, flush filter
GN_Flo, open filter
GN_Flr, read from filter
GN_Fpb, push back into filter