diff --git a/assets/disk0/tvdos/bin/playmov.js b/assets/disk0/tvdos/bin/playmov.js
index e8ba0ff..1fcf250 100644
--- a/assets/disk0/tvdos/bin/playmov.js
+++ b/assets/disk0/tvdos/bin/playmov.js
@@ -12,6 +12,8 @@ const fullFilePath = _G.shell.resolvePathInput(exec_args[1])
 const FILE_LENGTH = files.open(fullFilePath.full).size
 
 con.clear();con.curs_set(0)
+graphics.clearPixels(255)
+graphics.clearPixels2(240)
 
 
 let seqread = require("seqread")
diff --git a/assets/disk0/tvdos/bin/playmp2.js b/assets/disk0/tvdos/bin/playmp2.js
index 3ff3ddb..77a151c 100644
--- a/assets/disk0/tvdos/bin/playmp2.js
+++ b/assets/disk0/tvdos/bin/playmp2.js
@@ -2,7 +2,7 @@ const SND_BASE_ADDR = audio.getBaseAddr()
 
 if (!SND_BASE_ADDR) return 10
 
-const MP2_BITRATES = ["VBR", 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384]
+const MP2_BITRATES = ["???", 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384]
 const MP2_CHANNELMODES = ["Stereo", "Joint", "Dual", "Mono"]
 const pcm = require("pcm")
 const interactive = exec_args[2] && exec_args[2].toLowerCase() == "/i"
diff --git a/assets/disk0/tvdos/sbin/sysctl.js b/assets/disk0/tvdos/sbin/sysctl.js
new file mode 100644
index 0000000..3917d45
--- /dev/null
+++ b/assets/disk0/tvdos/sbin/sysctl.js
@@ -0,0 +1,54 @@
+// synopsis: sysctl {reset|...} target
+
+
+const verbs = {
+    "reset": ["Reset", "Resetting"]
+}
+const actions = {
+    "reset": {
+        "mmu": ()=>{
+            for (let k = 0; k < sys.maxmem(); k += 64) {
+                try {
+                    sys.free(k)
+                }
+                catch (e) {}
+            }
+        },
+        "graphics": ()=>{
+            graphics.resetPalette()
+            con.reset_graphics()
+            graphics.clearPixels(255)
+            graphics.clearPixels2(240)
+            graphics.setGraphicsMode(0)
+            graphics.setBackground(34,51,68)
+            sys.poke(-1299460, 20)
+            sys.poke(-1299460, 21)
+        }
+        "audio": ()=>{
+            for (let k = 0; k < 4; k++) {
+                audio.stop(k)
+                audio.purgeQueue(k)
+                audio.resetParams(k)
+            }
+        }
+    }
+}
+
+const verb = exec_args[1]
+const target = exec_args[2]
+
+if (verb && !target) {
+    println(`sysctl: no target specified for ${verbs[verb][1]}`)
+    return 1
+}
+if (!verb) {
+    println("Usage: sysctl {reset|...} target")
+    return 10
+}
+
+let actionfun = actions[verb][target]
+if (actionfun) actionfun()
+else {
+    printerrln(`sysctl: unknown target ${target}`)
+    return 1
+}
diff --git a/doc/implementation.tex b/doc/implementation.tex
index ad8b59f..647f18c 100644
--- a/doc/implementation.tex
+++ b/doc/implementation.tex
@@ -971,14 +971,15 @@ Address & RW & Description \\
 -131086 & RW & Current Layer Arrangement Index \\
 -131087..-131088 & RW & Framebuffer Horizontal Scroll \\
 -131089..-131090 & RW & Framebuffer Vertical Scroll \\
--132097..-131120 & RW & Scanline Offsets \\
+-132097..-133120 & RW & Scanline Offsets \\
+-133121..-135168 & RW & Font ROM Mapping Area \\
+-196609..-262144 & RW & Draw Instructions Area \\
 -1048577..-1299456 & RW & First Framebuffer \\
 -1299457 & RW & Screen Background RED \\
 -1299458 & RW & Screen Background GREEN \\
 -1299459 & RW & Screen Background BLUE \\
 -1299460 & RW & Command \\
 -1299461..-1299472 & RW & Command Arguments \\
--1300607..-1302526 & RW & Font ROM Mapping Area \\
 -1302527..-1302528 & RW & Text Cursor Position in $row \times 80 + col$ \\
 -1302529..-1305088 & RW & Text Foreground Colours \\
 -1305089..-1307648 & RW & Text Background Colours \\