diff options
| author | Yuchen Pei <me@ypei.me> | 2017-11-29 12:30:41 +0100 |
|---|---|---|
| committer | Yuchen Pei <me@ypei.me> | 2017-11-29 12:30:41 +0100 |
| commit | a000308104aab27c2dde9a306f1bc654b2db4806 (patch) | |
| tree | aecc628e14c1628b5714281437aba18680cdc27b /projects/12/Sys.jack | |
first commit
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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