Register parameters
RST 20H, DEFW $CE06
IN: A = character
HL = sequence buffer
OUT:
Fc=0 always
A=0 if sequence completed, -1 otherwise
Registers affected after return:
..BCDE../IXIY same
AF....HL/.... different
Notes
Internal operating system usage.
Write a char to the prefix sequence buffer.
Related calls
OS_Isq, initialise prefix sequence