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Diffstat (limited to 'projects/12/Sys.jack')
-rw-r--r-- | projects/12/Sys.jack | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/projects/12/Sys.jack b/projects/12/Sys.jack new file mode 100644 index 0000000..bee6f67 --- /dev/null +++ b/projects/12/Sys.jack @@ -0,0 +1,27 @@ +// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/12/Sys.jack
+
+/**
+ * A library that supports various program execution services.
+ */
+class Sys {
+
+ /** Performs all the initializations required by the OS. */
+ function void init() {
+ }
+
+ /** Halts the program execution. */
+ function void halt() {
+ }
+
+ /** Waits approximately duration milliseconds and returns. */
+ function void wait(int duration) {
+ }
+
+ /** Displays the given error code in the form "ERR<errorCode>",
+ * and halts the program's execution. */
+ function void error(int errorCode) {
+ }
+}
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