How to read/write Real-Time-Clock of Final Expansion?

MIRKOSOFT · 10. September 2010

Hi!

I never knew that VIC Final Expansion has Real-Time-Clock (RTC).

Sb. adds it to list of devices for Commodores supporting RTC.

So, here's simple Q:

WHAT A COMMAND TO USE TO READ OR WRITE RTC?

e.g. RAMLink has one of commands reading in ASCII format "T-RA" and writting in ASCII format "T-WA"

Thanks for every help.

Miro

Diddl · 10. September 2010

see docu of SD2IEC:

- T-R and T-W
the commands T-R (time read) and T-W
(time write) are available. If the RTC isn't present, both commands return
30,SYNTAX ERROR,00,00; if the RTC is present but not set correctly T-R will
return 31,SYNTAX ERROR,00,00.

Both commands expect a fourth character that specifies the time format
to be used, T-W expects that the new time follows that character in exactly
the format returned by T-R with the same format char.

The possible formats are:
- "A"SCII: "SUN. 01/20/08 01:23:45 PM"+CHR$(13)
The day-of-week string can be any of "SUN.", "MON.", "TUES", "WED.",
"THUR", "FRI.", "SAT.". The year field is modulo 100.
- "B"CD or "D"ecimal:
Both these formats use 9 bytes to specify the time. For BCD everything
is BCD-encoded, for Decimal the numbers are sent/parsed as-is.
Byte 0: Day of the week (0 for sunday)
1: Year (modulo 100 for BCD; -1900 for Decimal, i.e. 108 for 2008)
2: Month (1-based)
3: Day (1-based)
4: Hour (1-12)
5: Minute (0-59)
6: Second (0-59)
7: AM/PM-Flag (0 is AM, everything else is PM)
8: CHR$(13)

When the time is set a year less than 80 is interpreted as 20xx.

MIRKOSOFT · 10. September 2010

OK, it means that also SD2IEC has the same format to R/W RTC...

So, here else one Q: What a command uses uIEC from Jim Brain?

Many thanks.

Miro

for(;;) · 12. September 2010

IHMO the uIEC uses the same SD2IEC firmware, only the hardware variant differs.
In other words: same firmware -> same command