| Z88 Developers' Notes | ||
|---|---|---|
| Contents | Contents of System Calls | |
OS_Ploz, poll for running OZ
RST 20H, DEFW $C606
IN:
A = slot number (0 to 3)OUT, if call successfull:
Fz = 0, OZ is running in slotOUT, if call failed:
Fz = 1, OZ is not running in slot.
Fc = 1Registers changed after return:
A = RC_ONF, no card found
A.BCDEHL/IXIY sameNotes:
.F....../.... different
OZ can only run in slot 0 or 1. Using this call for slots 2 and 3 will always return Fz = 1.Bugs:
This call is used internally by OZ in the Flash card management sub-system, when it is necessary to turn off the screen during Flash hardware operations on the same card as a running OZ.
This system call is only available in OZ release 4.2 and newer.
-Related system calls: