sleep and time

After the pressure equalises, the light above the door should only come on after three seconds. With yield you would have to count six ticks for that. sleep makes it easier.

sleep counts seconds#

sleep 3 pauses the chip for three seconds, not three ticks. At 0.5 s per tick that is six ticks. After that it continues on the next line. A register works instead of a number too: sleep r5.

# light three seconds after start
s d0 On 0
sleep 3
s d0 On 1

Inside a loop sleep also replaces the yield. A reading every five seconds looks like this:

# pressure to the display every 5 seconds
start:
l r0 d1 Pressure
s d2 Setting r0
sleep 5
j start

Since October 2024 sleep uses game time. If you pause the game, the waiting time pauses too.

The line 0 trap#

sleep makes the chip deaf#

During sleep the chip reads nothing and switches nothing. A button press in that time is lost, a pressure drop goes unnoticed for five seconds. For displays and slow sequences that is fine. For anything that has to react quickly you use yield and count the ticks yourself – that comes the day after tomorrow.