116 Rabbit 2000/3000 Microprocessor
Description
Rotates to the left with the C flag the contents of register DE. Each bit in the register moves to the next high-
est-order bit position (bit 0 moves to bit 1, etc.) while the C flag moves to bit 0 and bit 15 moves to the C flag.
See figure below.
Figure 2: Bit logic of the RL instruction.
RL DE
Opcode Instruction Clocks Operation
F3 RL DE 2 {CF,DE} = {DE,CF}
Flags ALTD I/O
S Z L/V C F R SP S D
• • L • • •
15
0
CF
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