RLCA - Z80 instruction reference

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