RRCA - Z80 instruction reference

rrcaRotate A right circular 
Rotates A right one bit, copying bit 0 to C and to bit 7.
1 byte · 4 cycles
Used in The snake gameZ80 assembly
Flappy birdZ80 assembly
 
SZHP/VNC ––0–0●
● set from the result
0 always 0
– not changed
Forms  rrca  
The contents of A are rotated right one bit position. The contents of bit 0 are copied to the carry flag and bit 7.
         .org 0x8000
        ld a, 5
        rrca
        halt