diff --git a/assets/disk0/home/hdk/jmp.js b/assets/disk0/home/hdk/jmp.js
new file mode 100644
index 0000000..dd16417
--- /dev/null
+++ b/assets/disk0/home/hdk/jmp.js
@@ -0,0 +1,61 @@
+if (exec_args[1] === undefined) {
+    println("Usage: jmp pointer_in_hexadecimal")
+    println("   This will execute the binary image stored on the Core Memory at the given pointer.")
+    return 1
+}
+
+
+const ptr = parseInt(exec_args[1], 16)
+const magic = sys.peek(ptr)
+
+if (magic != 0xA5) return 1
+
+//////////////////////////////////
+
+function seq(s) {
+    let out = ""
+    let cnt = 0
+    let oldchar = s[0]
+    for (let char of s) {
+        if (char === oldchar) {
+            cnt += 1
+        }
+        else {
+            out += ('' + cnt) + oldchar
+            cnt = 1
+        }
+        oldchar = char
+    }
+    return out + cnt + oldchar
+}
+
+let key = "00"
+let keyBytes = [0x00]
+let keyCursor = 0
+
+function getNewKeySeq() {
+    key = seq(key)
+    keyBytes = []
+    keyCursor = 0
+    for (let i = 0; i < key.length; i += 2) {
+        keyBytes.push(parseInt(key.substring(i, i+2), 16))
+    }
+}
+
+//////////////////////////////////
+
+const payloadSize = (sys.peek(ptr+1) << 16) | (sys.peek(ptr+2) << 8) | sys.peek(ptr+3)
+
+let encrypted = new Int8Array(payloadSize)
+
+// read and decrypt
+for (let outcnt = 0; outcnt < payloadSize; outcnt++) {
+    encrypted[outcnt] = sys.peek(ptr+4+outcnt) ^ keyBytes[keyCursor++]
+    if (keyCursor >= keyBytes.length) {
+        getNewKeySeq()
+    }
+}
+
+let image = gzip.decomp(encrypted)
+
+eval(image)
\ No newline at end of file
diff --git a/assets/disk0/home/hdk/link.js b/assets/disk0/home/hdk/link.js
new file mode 100644
index 0000000..28a1e3f
--- /dev/null
+++ b/assets/disk0/home/hdk/link.js
@@ -0,0 +1,49 @@
+if (exec_args[1] === undefined || exec_args[2] === undefined) {
+    println("Usage: link -e/-o myfile.bin")
+    println("   This will produce generic [E]xecutable/[O]bject code that will be loaded dynamically in the Core Memory")
+    println("Usage: link -e/-o myfile.bin -a 1e00")
+    println("   This will produce [E]xecutable/[O]bject code that will be loaded at memory address 1E00h")
+    return 1
+}
+
+let infilePath = _G.shell.resolvePathInput(exec_args[2]).full
+let infile = files.open(infilePath)
+let outfile = files.open(infilePath + ".out")
+let outMode = exec_args[1].toLowerCase()
+
+let type = {
+    "-r": "\x01",
+    "-e": "\x02",
+    "-o": "\x03",
+    "-c": "\x04"
+}
+
+function toI32(num) {
+    const buffer = new ArrayBuffer(4)
+    const view = new DataView(buffer)
+    view.setInt32(0, num, false)
+    return Array.from(new Uint8Array(buffer))
+}
+
+function toI24(num) {
+    return toI32(num).slice(-3)
+}
+
+function i32ToI24(int) {
+    return int.slice(-3)
+}
+
+let addr = 0
+if (exec_args[3] !== undefined && exec_args[3].toLowerCase() == "-a" && exec_args[4] !== undefined)
+    addr = parseInt(exec_args[4], 16)
+
+outfile.sappend("\x20\xC0\xCC\x0A")
+outfile.sappend(type[outMode] || "\x00")
+outfile.bappend(toI24(addr))
+outfile.bappend(toI32(infile.size))
+outfile.sappend(infile.sread())
+
+infile.close()
+outfile.close()
+
+return 0
\ No newline at end of file
diff --git a/assets/disk0/home/hdk/load.js b/assets/disk0/home/hdk/load.js
new file mode 100644
index 0000000..6545c52
--- /dev/null
+++ b/assets/disk0/home/hdk/load.js
@@ -0,0 +1,29 @@
+if (exec_args[1] === undefined) {
+    println("Usage: load myfile.out")
+    println("   This will load the binary image onto the Core Memory")
+    return 1
+}
+
+let infilePath = _G.shell.resolvePathInput(exec_args[1]).full
+let infile = files.open(infilePath)
+
+const metaArea = sys.malloc(12)
+infile.pread(metaArea, 12, 0)
+let addrToLoad = (sys.peek(metaArea+5) << 16) | (sys.peek(metaArea+6) << 8) | (sys.peek(metaArea+7))
+const imageSize = (sys.peek(metaArea+9) << 16) | (sys.peek(metaArea+10) << 8) | (sys.peek(metaArea+11))
+sys.free(metaArea)
+
+if (addrToLoad == 0)
+    addrToLoad = sys.malloc(imageSize + 4)
+else
+    forceAlloc(addrToLoad, imageSize + 4)
+
+// writes IMAGE_SIZE and the BINARY_IMAGE directly to the memory
+infile.pread(addrToLoad, imageSize + 4, 8)
+infile.close()
+
+// write magic 0xA5 to the beginning of the image area
+sys.poke(addrToLoad, 0xA5)
+
+println(addrToLoad.toString(16).toUpperCase() + "h")
+return addrToLoad
\ No newline at end of file
diff --git a/assets/disk0/tvdos/TVDOS.SYS b/assets/disk0/tvdos/TVDOS.SYS
index e296392..8e4a3ed 100644
--- a/assets/disk0/tvdos/TVDOS.SYS
+++ b/assets/disk0/tvdos/TVDOS.SYS
@@ -1022,6 +1022,8 @@ files.reservedNames = ["AUX", // unused
 
 /** This function only creates a file descriptor; will not actually interact with the drives yet. */
 files.open = (fullPath) => {
+    if (fullPath == undefined) throw Error("path is undefined")
+
     if (files.reservedNames.includes(fullPath.toUpperCase())) {
         return new TVDOSFileDescriptor(fullPath.toUpperCase())
     }
@@ -1263,7 +1265,7 @@ var require = (absdir) => {
 }
 
 
-var GL = require("A:/tvdos/include/gl.js")
+var GL = require("A:/tvdos/include/gl.mjs")
 
 
 // @param cmdsrc JS source code