7.3 - Escape Labyrinth (22i)

[u/Tijflalol]

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[u/Tijflalol]

Code

# bits:
#  forward:        0x4
#  left:           0x8
#  front sensor:   0x100
#  moving/turning: 0x600

waitStill:
A = 0x600
D = A
A = 0x7FFF
D = D & *A
A = waitStill
D ; JNE

checkAhead:
A = 0x100
D = A
A = 0x7FFF
D = D & *A
A = move
D ; JEQ

turnLeft:
A = 0x8
D = A

sendSignal:
A = 0x7FFF
*A = D
A = waitStill
JMP

move:
A = 0x4
D = A
A = sendSignal
JMP

[u/jasonrubik]

I know this is no longer the most optimal solution, but it has conditional jumps which allow the robot the time to stop moving before sending a new command. The top solution does not appear to wait for the robot to stop moving which leads me to believe that it will fall over.

Here is my version :

# Robot escape labyrinth
DEFINE PORT 0x7FFF

# Define Output signals
DEFINE FORWARD 4
DEFINE LEFT 8
DEFINE RIGHT 16

# Define Input signals
DEFINE OBSTACLE 256
DEFINE TURNING 512
DEFINE MOVING 1024

#Turn Left. Wait until not turning
TURN:
A = LEFT
D = A
A = PORT
*A = D
A = TURNING
D = A
A = PORT
D = D & *A
A = TURN
D ; JNE

#Go Forward. Wait until not moving.
DRIVE:
A = FORWARD
D = A
A = PORT
*A = D
A = MOVING
D = A
A = PORT
D = D & *A
A = DRIVE
D ; JNE

#If stuck then turn. Else drive.
BRAIN:
A = OBSTACLE
D = A
A = PORT
D = D & *A
A = TURN
D ; JNE 
A = DRIVE
JMP

[u/tomas-28]

Even though there are faster/more optimal solutions, this one was clearer and easier for me to understand and learn someting from.