To find the number of days between two dates

• enter 1^st date into Y-stack as dd.mmyyyy
• key in 2^nd date into X-stack as dd.mmyyyy
• XEQ ALPHA D D A Y S ALPHA
• result is the difference in days.
• DDAYS can be added to the CST program chooser to make it easier if multiple calculations are required

Days between 27/2/66 and 31/5/22

27.021966 ENTER 31.052022 XEQ ALPHA D D A Y S ALPHA

Result = 20,547

Check :

365 ÷

Result 56.293

I'm 56 and a bit… sounds right…

Various Alarm functions

Put any message for the Alarm into the ALHPA register

Load the stack registers with:

• Z : Repeat Interval HHHH.MMSSs or 0
• Y : Date DD.MMYYYY or 0
• X : Time HH.MMSSs

Execute XYZALM to set the alarm

When alarm goes off it is acknowledged by pressing any key except STO.

• Acknowledging a non-repeating (i.e. Z was 0) alarm cancels it.
• Acknowledging a repeating alarm cancels it and re-arms it, adding the Repeat Interval to create the new alarm time.
• Pressing STO cancels the alarm but makes it a PAST DUE alarm.

Set alarm for 22:20, today, not repeating, called Supper

• ALPHA S U P PER ALPHA
• 0 ENTER (for Z = repeat interval)
• 0 ENTER (for Y = Date = Today)
• 22.20 XEQ ALPHA X Y Z A L M ALPHA

At 22:20 the alarm is activated. ALPHA shows SUPPER.

Alarm is cancelled by pressing any key but STO

Pressing STO creates a PAST DUE alarm which means it gets re-triggered if the calculator is turned off. It can be cancelled and deleted by pressing any key (except STO) and then the calculator will turn off. Pressing STO will create a new Past Due alarm, and allow the calculator to turn off. On turn on the Past Due alarm will still exist and turning off will trigger it again.

A Past Due alarm is useful to remind you that something happened previously and turning the calculator off is a memory-jogger.

CATALOGUE 5 R/S and ⇑ ⇓ steps through all alarms.

To clear an alarm from the Catalogue: SHIFT C ( where C is √ on top row )

— John Pumford-Green 31/05/22 13:13

Page last updated: 06/03/25 06:49 GMT