Date/Time

[danwinslow]

What are the strategies for maintaining date/time on an 8 bit? Are there any standard locations or do you set up your own and count ticks with an interrupt?

[Plastron]

time= int((peek(18)*65536+peek(19)*256+peek(20))/60)

 

this will count in seconds. Taken from Mapping the Atari

 

RTCLOCK 18,19,20

Edited August 14, 2005 by Plastron

[fox]

The above formula is for NTSC. For PAL, replace 60 with 50, or even better 49.86074561.

 

Or maybe you want the R-Time 8 cartridge: it has a battery-powered real time clock with real date and time.

[geosteve]

If I remember right, it's been about 10 years, using Atari's DOS XE has a date and time setting, both of which are recorded in file saves. The DOS XE menu will help you with the settings as a guide.