Register parameters
| Code Block |
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| language | none |
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| title | RST 20H, DEFW $2009 |
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IN:
A = MT_CVT ($00), Convert source to time to elapse:
BHL = source time days
CDE = source time centiseconds/ticks
A = MT_UBT ($01), Update base time:
BHL = additional offset in minutes
C = offset in seconds
A = MT_UPT ($02), Read uptime
OUT, if A(in) = MT_CVT
Fc = 0, success
BHL = minutes still to elapse
C = seconds still to elapse (only when minutes < 0)
A = centiseconds still to elapse
Fc = 1, failure
A = RC_FAIL ($16), time given to routine has already elapsed
Registers changed after return:
....DE../IXIY same
AFBC..HL/.... different
OUT, if A(in) = MT_UBT
Fc = 0, always
Registers changed after return:
A.BCDEHL/IXIY same
.F....../.... different
OUT, if A(in) = MT_UPT
Fc = 0, always
DE = days since latest hard reset
H = hours, L = minutes and C = seconds
Registers changed after return:
A.B...../IXIY same
.F.CDEHL/.... different
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Notes
- MT_CVT : Operating system uses this call to determine when an alarm has to be triggered by calculating difference between alarm time and current time.
- MT_UBT : Applications should not use this call, the system to maintain the time over soft reset. It adjusts the base time because hardware timers are reset.
- MT_UPT : Uptime is the operating system running time since latest hard reset. Uptime is preserved over soft reset (OZ V5.0).
GN_Gmt, get (read) machine time in internal format
GN_Gtm, convert an ASCII string to a time in internal format
GN_Pmt, put (set) machine time
GN_Ptm, write internal time as ASCII string
GN_Sdo, send date and time to standard output
OS_Dly, delay a given period