Register parameters
RST 20H, DEFW $6809
IN: -
OUT, if call successful:
Fc = 0
BHL = pointer to alarm block
OUT, if call failed:
Fc = 1
A = error code
RC_ROOM ($07), no room to allocate alarm block
Registers changed after return:
...CDE../IXIY same
AFB...HL/.... different
Related calls
GN_Alp, process an expired alarm
GN_Fab, free alarm block
GN_Lab, link an alarm block into the alarm chain
GN_Uab, unlink an alarm block from the alarm chain
OS_Alm, alarm manipulation (internal OZ usage)