OS_Isq, Initialize prefix sequence
Register parameters
RST 20H, DEFW $D006
IN: HL = sequence buffer
OUT: -
Registers affected after return:
A.BCDE../IXIY same
.F....HL/.... different Notes
Internal operating system usage.
Clears buffer and sets buffer pointer. Buffer length is 22 bytes.
Related calls
OS_Wsq, write to prefix sequence