stuffs

assets/tvdos/TVDOS.SYS

@@ -1,5 +1,6 @@
 // Boot script
 var _TVDOS = {};
+_TVDOS.VERSION = "1.0";
 _TVDOS.DRIVES = {}; // Object where key-value pair is <drive-letter> : [serial-port, drive-number]
 // actually figure out the drive letter association
 // Drive A is always the device we're currently on

assets/tvdos/command.js

@@ -1,10 +1,9 @@
-const DOS_VERSION = "1.0";
-let PROMPT_TEXT = ">";
+const PROMPT_TEXT = ">";
 let CURRENT_DRIVE = "A";
 
 let shell_pwd = [""];
 
-const welcome_text = "TSVM Disk Operating System, version " + DOS_VERSION;
+const welcome_text = "TSVM Disk Operating System, version " + _TVDOS.VERSION;
 
 function get_prompt_text() {
     return CURRENT_DRIVE + ":\\" + shell_pwd.join("\\") + PROMPT_TEXT;

assets/tvdos/flsh.js

@@ -0,0 +1,106 @@
+let CURRENT_DRIVE = "A";
+
+let shell_pwd = [""];
+
+const welcome_text = "TSVM Disk Operating System, version " + _TVDOS.VERSION;
+
+function print_prompt_text() {
+    // oh-my-zsh-like prompt
+    con.color_pair(239,161);
+    print(" "+CURRENT_DRIVE);
+    con.color_pair(161,253);
+    con.addch(16);
+    con.color_pair(0,253);
+    print("\\"+shell_pwd.join("\\"));
+    con.color_pair(253,255);
+    con.addch(16);
+    con.addch(32);
+    con.color_pair(239,255);
+}
+
+function greet() {
+    con.color_pair(0,253);
+    //print(welcome_text + " ".repeat(_fsh.scrwidth - welcome_text.length));
+    print(welcome_text + " ".repeat(80 - welcome_text.length));
+    con.color_pair(239,255);
+    println();
+}
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+con.clear();
+
+greet();
+
+let cmdHistory = []; // zeroth element is the oldest
+let cmdHistoryScroll = 0; // 0 for outside-of-buffer, 1 for most recent
+while (true) {
+    print_prompt_text();
+
+    let cmdbuf = "";
+
+    while (true) {
+        let key = con.getch();
+
+        // printable chars
+        if (key >= 32 && key <= 126) {
+            let s = String.fromCharCode(key);
+            cmdbuf += s;
+            print(s);
+        }
+        // backspace
+        else if (key === 8 && cmdbuf.length > 0) {
+            cmdbuf = cmdbuf.substring(0, cmdbuf.length - 1);
+            print(String.fromCharCode(key));
+        }
+        // enter
+        else if (key === 10 || key === 13) {
+            println();
+            try {
+                println("You entered: " + cmdbuf);
+            }
+            catch (e) {
+                println(e);
+            }
+            finally {
+                if (cmdbuf.trim().length > 0)
+                    cmdHistory.push(cmdbuf);
+
+                cmdHistoryScroll = 0;
+                break;
+            }
+        }
+        // up arrow
+        else if (key === 19 && cmdHistory.length > 0 && cmdHistoryScroll < cmdHistory.length) {
+            cmdHistoryScroll += 1;
+
+            // back the cursor in order to type new cmd
+            let x = 0;
+            for (x = 0; x < cmdbuf.length; x++) print(String.fromCharCode(8));
+            cmdbuf = cmdHistory[cmdHistory.length - cmdHistoryScroll];
+            // re-type the new command
+            print(cmdbuf);
+
+        }
+        // down arrow
+        else if (key === 20) {
+            if (cmdHistoryScroll > 0) {
+                // back the cursor in order to type new cmd
+                let x = 0;
+                for (x = 0; x < cmdbuf.length; x++) print(String.fromCharCode(8));
+                cmdbuf = cmdHistory[cmdHistory.length - cmdHistoryScroll];
+                // re-type the new command
+                print(cmdbuf);
+
+                cmdHistoryScroll -= 1;
+            }
+            else {
+                // back the cursor in order to type new cmd
+                let x = 0;
+                for (x = 0; x < cmdbuf.length; x++) print(String.fromCharCode(8));
+                cmdbuf = "";
+            }
+        }
+    }
+}