Warning

You are reading an old version of this documentation. If you want up-to-date information, please have a look at 5.0 .

Reserved memory

Registers

Registers reserved by default

Most of the registers used by the plugin can be modified if needed in the input parameters of the programs. But if they are not changed, the default register numbers used are those listed in Default registers.

Table 36 Default registers
Register number	Register type	Description
R[21]	Registers	Stores the last error found by EYE_CHECK_LAST_ERROR
PR[20]	Position Reg	Stores the last part coordinates found by EYE_GET_PART
SR[20]	String Reg	Stores the last response found by EYE_RAW_COMMAND

Note

Once the registers are chosen, consider them reserved by Asyril.

Reserved registers

Three registers must never be modified by another program.

Table 37 Reserved registers for private use
Register number	Register type
R[18]	Registers
R[19]	Registers
R[20]	Registers

Important

If you modify any of these private registers, you may encounter unexpected behavior.

Semaphores

Semaphores are only dedicated to KAREL programs. These semaphores are shared from one KAREL program to another. Therefore, if you use another KAREL program, make sure you do not use the same semaphore as these:

Semaphore 22
Semaphore 23
Semaphore 24
Semaphore 25
Semaphore 26
Semaphore 27

Warning

These semaphores are dedicated to communication synchronization. If you modify one of them, you may encounter unexpected behavior.