- SYS_HALT, /* Halts the operating system. */
- SYS_EXIT, /* Terminates this process. */
- SYS_EXEC, /* Start another process. */
- SYS_WAIT, /* Waits for a child process to die. */
- SYS_CREATE, /* Creates a file. */
- SYS_REMOVE, /* Deletes a file. */
- SYS_OPEN, /* Opens a file. */
- SYS_FILESIZE, /* Obtains a file's size. */
- SYS_READ, /* Reads from a file. */
- SYS_WRITE, /* Writes to a file. */
+ SYS_HALT, /* Halt the operating system. */
+ SYS_EXIT, /* Terminate this process. */
+ SYS_WAIT, /* Wait for a child process to die. */
+ SYS_YIELD, /* Yield to another process. */
+ SYS_CREATE, /* Create a file. */
+ SYS_REMOVE, /* Delete a file. */
+ SYS_OPEN, /* Open a file. */
+ SYS_FILESIZE, /* Obtain a file's size. */
+ SYS_READ, /* Read from a file. */
+ SYS_WRITE, /* Write to a file. */