qdosmsq:traps:trap_1:srtc
Table of Contents
MT_SCLCK/SMS_SRTC and MT_ACLCK/SMS_ARTC
The trap MT_SCLCK/SMS_SRTC sets the clock while the trap MT_ACLCK/SMS_ARTC adjusts the clock.
| Call Parameters | Return Parameters | ||
|---|---|---|---|
| D0.B | $14 or $15 | D0.L | Corrupted? |
| D1.L | Time in seconds. | D1.L | Time in seconds. |
| D2.L | D2.L | Corrupted. | |
| D3.L | D3.L | Corrupted. | |
| A0.L | A0.L | Corrupted. | |
Errors
No errors are returned by this trap.
Notes
- All registers not shown above are not used on entry and are preserved on exit.
- D0.B is $14 for MT_SCLCK/SMS_SRTC and $15 for MT_ACLCK/SMS_ARTC.
- D1.L contains the signed adjustment in seconds for MT_SCLCK/SMS_SRTC and the number of seconds since 00:00 1st January 1961 for MT_ACLCK/SMS_ARTC.
- On return D1.L contains the adjusted time in seconds since 00:00 1st January 1961.
Example
The example below shows the use of this trap call to add 1 hour to the clock.
adj_1h move.l #60*60,d1 ; The number of seconds in 1 hour.
moveq #MT_ACLCK,d0 ; Adjust the clock.
trap #1 ; The later time in now in D1.L.
qdosmsq/traps/trap_1/srtc.txt · Last modified: 2009/02/25 18:14 by george.gwilt
