diff --git a/NOTES.md b/NOTES.md
index fdda99e..cbcb8fc 100644
--- a/NOTES.md
+++ b/NOTES.md
@@ -5,3 +5,6 @@ RAM8
 
 RAM64
 : Interesting part here is that the MSB|LSB decision is arbitary. You could use the LSB to pick the RAM8 module, and use the MSB as the address within the RAM8, and it _would still work_. The caller for RAM64 doesn't care how you use the "complete address". It just cares that you return the same thing for that address.
+
+RAM512
+: I used the premise of the previous note and decided to index the RAM64 moduls by the LSB instead of the customary MSB. It still works :metal:
diff --git a/README.md b/README.md
index f2da89b..3c02c6c 100644
--- a/README.md
+++ b/README.md
@@ -43,8 +43,8 @@ Make sure you read through the [Hardware Simulator Tutorial](https://b1391bd6-da
 - [x] Bit (1 Mux, 1DFF)
 - [x] Register (16 Bits)
 - [x] RAM8 (8 Registers, 1 DMux8Way, 1 Mux8Way16)
-- [x] RAM64
-- [ ] RAM512
+- [x] RAM64 (8 RAM8, 1 DMux8Way, 1 Mux8Way16)
+- [x] RAM512 (8 RAM64, 1 DMux8Way, 1 Mux8Way16)
 - [ ] RAM4K
 - [ ] RAM16K
 - [ ] PC
diff --git a/projects/03/b/RAM4K.hdl b/projects/03/b/RAM4K.hdl
index c3bc33b..762a206 100644
--- a/projects/03/b/RAM4K.hdl
+++ b/projects/03/b/RAM4K.hdl
@@ -5,8 +5,8 @@
 
 /**
  * Memory of 4K registers, each 16 bit-wide. Out holds the value
- * stored at the memory location specified by address. If load==1, then 
- * the in value is loaded into the memory location specified by address 
+ * stored at the memory location specified by address. If load==1, then
+ * the in value is loaded into the memory location specified by address
  * (the loaded value will be emitted to out from the next time step onward).
  */
 
@@ -15,5 +15,37 @@ CHIP RAM4K {
     OUT out[16];
 
     PARTS:
-    // Put your code here:
-}
\ No newline at end of file
+
+    // The MSB of the address picks which RAM512 module is being picked
+    DMux8Way(in=load, sel=address[9..11],
+      a=load1,
+      b=load2,
+      c=load3,
+      d=load4,
+      e=load5,
+      f=load6,
+      g=load7,
+      h=load8);
+
+    // We use the LSB of the address to pick the register inside the RAM512
+    RAM512(in=in, load=load1, address=address[0..8], out=out1);
+    RAM512(in=in, load=load2, address=address[0..8], out=out2);
+    RAM512(in=in, load=load3, address=address[0..8], out=out3);
+    RAM512(in=in, load=load4, address=address[0..8], out=out4);
+    RAM512(in=in, load=load5, address=address[0..8], out=out5);
+    RAM512(in=in, load=load6, address=address[0..8], out=out6);
+    RAM512(in=in, load=load7, address=address[0..8], out=out7);
+    RAM512(in=in, load=load8, address=address[0..8], out=out8);
+
+    // MSB
+    Mux8Way16(
+      a=out1,
+      b=out2,
+      c=out3,
+      d=out4,
+      e=out5,
+      f=out6,
+      g=out7,
+      h=out8,
+      sel=address[9..11], out=out);
+}
diff --git a/projects/03/b/RAM4K.out b/projects/03/b/RAM4K.out
new file mode 100644
index 0000000..c53d23a
--- /dev/null
+++ b/projects/03/b/RAM4K.out
@@ -0,0 +1,320 @@
+| time |   in   |load |address |  out   |
+| 0+   |      0 |  0  |     0  |      0 |
+| 1    |      0 |  0  |     0  |      0 |
+| 1+   |      0 |  1  |     0  |      0 |
+| 2    |      0 |  1  |     0  |      0 |
+| 2+   |   1111 |  0  |     0  |      0 |
+| 3    |   1111 |  0  |     0  |      0 |
+| 3+   |   1111 |  1  |  1111  |      0 |
+| 4    |   1111 |  1  |  1111  |   1111 |
+| 4+   |   1111 |  0  |     0  |      0 |
+| 5    |   1111 |  0  |     0  |      0 |
+| 5+   |   3513 |  0  |  3513  |      0 |
+| 6    |   3513 |  0  |  3513  |      0 |
+| 6+   |   3513 |  1  |  3513  |      0 |
+| 7    |   3513 |  1  |  3513  |   3513 |
+| 7+   |   3513 |  0  |  3513  |   3513 |
+| 8    |   3513 |  0  |  3513  |   3513 |
+| 8    |   3513 |  0  |  1111  |   1111 |
+| 8+   |   4095 |  0  |  1111  |   1111 |
+| 9    |   4095 |  0  |  1111  |   1111 |
+| 9+   |   4095 |  1  |  4095  |      0 |
+| 10   |   4095 |  1  |  4095  |   4095 |
+| 10+  |   4095 |  0  |  4095  |   4095 |
+| 11   |   4095 |  0  |  4095  |   4095 |
+| 11   |   4095 |  0  |  3513  |   3513 |
+| 11   |   4095 |  0  |  4095  |   4095 |
+| 11+  |   4095 |  0  |  2728  |      0 |
+| 12   |   4095 |  0  |  2728  |      0 |
+| 12   |   4095 |  0  |  2729  |      0 |
+| 12   |   4095 |  0  |  2730  |      0 |
+| 12   |   4095 |  0  |  2731  |      0 |
+| 12   |   4095 |  0  |  2732  |      0 |
+| 12   |   4095 |  0  |  2733  |      0 |
+| 12   |   4095 |  0  |  2734  |      0 |
+| 12   |   4095 |  0  |  2735  |      0 |
+| 12+  |  21845 |  1  |  2728  |      0 |
+| 13   |  21845 |  1  |  2728  |  21845 |
+| 13+  |  21845 |  1  |  2729  |      0 |
+| 14   |  21845 |  1  |  2729  |  21845 |
+| 14+  |  21845 |  1  |  2730  |      0 |
+| 15   |  21845 |  1  |  2730  |  21845 |
+| 15+  |  21845 |  1  |  2731  |      0 |
+| 16   |  21845 |  1  |  2731  |  21845 |
+| 16+  |  21845 |  1  |  2732  |      0 |
+| 17   |  21845 |  1  |  2732  |  21845 |
+| 17+  |  21845 |  1  |  2733  |      0 |
+| 18   |  21845 |  1  |  2733  |  21845 |
+| 18+  |  21845 |  1  |  2734  |      0 |
+| 19   |  21845 |  1  |  2734  |  21845 |
+| 19+  |  21845 |  1  |  2735  |      0 |
+| 20   |  21845 |  1  |  2735  |  21845 |
+| 20+  |  21845 |  0  |  2728  |  21845 |
+| 21   |  21845 |  0  |  2728  |  21845 |
+| 21   |  21845 |  0  |  2729  |  21845 |
+| 21   |  21845 |  0  |  2730  |  21845 |
+| 21   |  21845 |  0  |  2731  |  21845 |
+| 21   |  21845 |  0  |  2732  |  21845 |
+| 21   |  21845 |  0  |  2733  |  21845 |
+| 21   |  21845 |  0  |  2734  |  21845 |
+| 21   |  21845 |  0  |  2735  |  21845 |
+| 21+  | -21846 |  1  |  2728  |  21845 |
+| 22   | -21846 |  1  |  2728  | -21846 |
+| 22+  | -21846 |  0  |  2728  | -21846 |
+| 23   | -21846 |  0  |  2728  | -21846 |
+| 23   | -21846 |  0  |  2729  |  21845 |
+| 23   | -21846 |  0  |  2730  |  21845 |
+| 23   | -21846 |  0  |  2731  |  21845 |
+| 23   | -21846 |  0  |  2732  |  21845 |
+| 23   | -21846 |  0  |  2733  |  21845 |
+| 23   | -21846 |  0  |  2734  |  21845 |
+| 23   | -21846 |  0  |  2735  |  21845 |
+| 23+  |  21845 |  1  |  2728  | -21846 |
+| 24   |  21845 |  1  |  2728  |  21845 |
+| 24+  | -21846 |  1  |  2729  |  21845 |
+| 25   | -21846 |  1  |  2729  | -21846 |
+| 25+  | -21846 |  0  |  2728  |  21845 |
+| 26   | -21846 |  0  |  2728  |  21845 |
+| 26   | -21846 |  0  |  2729  | -21846 |
+| 26   | -21846 |  0  |  2730  |  21845 |
+| 26   | -21846 |  0  |  2731  |  21845 |
+| 26   | -21846 |  0  |  2732  |  21845 |
+| 26   | -21846 |  0  |  2733  |  21845 |
+| 26   | -21846 |  0  |  2734  |  21845 |
+| 26   | -21846 |  0  |  2735  |  21845 |
+| 26+  |  21845 |  1  |  2729  | -21846 |
+| 27   |  21845 |  1  |  2729  |  21845 |
+| 27+  | -21846 |  1  |  2730  |  21845 |
+| 28   | -21846 |  1  |  2730  | -21846 |
+| 28+  | -21846 |  0  |  2728  |  21845 |
+| 29   | -21846 |  0  |  2728  |  21845 |
+| 29   | -21846 |  0  |  2729  |  21845 |
+| 29   | -21846 |  0  |  2730  | -21846 |
+| 29   | -21846 |  0  |  2731  |  21845 |
+| 29   | -21846 |  0  |  2732  |  21845 |
+| 29   | -21846 |  0  |  2733  |  21845 |
+| 29   | -21846 |  0  |  2734  |  21845 |
+| 29   | -21846 |  0  |  2735  |  21845 |
+| 29+  |  21845 |  1  |  2730  | -21846 |
+| 30   |  21845 |  1  |  2730  |  21845 |
+| 30+  | -21846 |  1  |  2731  |  21845 |
+| 31   | -21846 |  1  |  2731  | -21846 |
+| 31+  | -21846 |  0  |  2728  |  21845 |
+| 32   | -21846 |  0  |  2728  |  21845 |
+| 32   | -21846 |  0  |  2729  |  21845 |
+| 32   | -21846 |  0  |  2730  |  21845 |
+| 32   | -21846 |  0  |  2731  | -21846 |
+| 32   | -21846 |  0  |  2732  |  21845 |
+| 32   | -21846 |  0  |  2733  |  21845 |
+| 32   | -21846 |  0  |  2734  |  21845 |
+| 32   | -21846 |  0  |  2735  |  21845 |
+| 32+  |  21845 |  1  |  2731  | -21846 |
+| 33   |  21845 |  1  |  2731  |  21845 |
+| 33+  | -21846 |  1  |  2732  |  21845 |
+| 34   | -21846 |  1  |  2732  | -21846 |
+| 34+  | -21846 |  0  |  2728  |  21845 |
+| 35   | -21846 |  0  |  2728  |  21845 |
+| 35   | -21846 |  0  |  2729  |  21845 |
+| 35   | -21846 |  0  |  2730  |  21845 |
+| 35   | -21846 |  0  |  2731  |  21845 |
+| 35   | -21846 |  0  |  2732  | -21846 |
+| 35   | -21846 |  0  |  2733  |  21845 |
+| 35   | -21846 |  0  |  2734  |  21845 |
+| 35   | -21846 |  0  |  2735  |  21845 |
+| 35+  |  21845 |  1  |  2732  | -21846 |
+| 36   |  21845 |  1  |  2732  |  21845 |
+| 36+  | -21846 |  1  |  2733  |  21845 |
+| 37   | -21846 |  1  |  2733  | -21846 |
+| 37+  | -21846 |  0  |  2728  |  21845 |
+| 38   | -21846 |  0  |  2728  |  21845 |
+| 38   | -21846 |  0  |  2729  |  21845 |
+| 38   | -21846 |  0  |  2730  |  21845 |
+| 38   | -21846 |  0  |  2731  |  21845 |
+| 38   | -21846 |  0  |  2732  |  21845 |
+| 38   | -21846 |  0  |  2733  | -21846 |
+| 38   | -21846 |  0  |  2734  |  21845 |
+| 38   | -21846 |  0  |  2735  |  21845 |
+| 38+  |  21845 |  1  |  2733  | -21846 |
+| 39   |  21845 |  1  |  2733  |  21845 |
+| 39+  | -21846 |  1  |  2734  |  21845 |
+| 40   | -21846 |  1  |  2734  | -21846 |
+| 40+  | -21846 |  0  |  2728  |  21845 |
+| 41   | -21846 |  0  |  2728  |  21845 |
+| 41   | -21846 |  0  |  2729  |  21845 |
+| 41   | -21846 |  0  |  2730  |  21845 |
+| 41   | -21846 |  0  |  2731  |  21845 |
+| 41   | -21846 |  0  |  2732  |  21845 |
+| 41   | -21846 |  0  |  2733  |  21845 |
+| 41   | -21846 |  0  |  2734  | -21846 |
+| 41   | -21846 |  0  |  2735  |  21845 |
+| 41+  |  21845 |  1  |  2734  | -21846 |
+| 42   |  21845 |  1  |  2734  |  21845 |
+| 42+  | -21846 |  1  |  2735  |  21845 |
+| 43   | -21846 |  1  |  2735  | -21846 |
+| 43+  | -21846 |  0  |  2728  |  21845 |
+| 44   | -21846 |  0  |  2728  |  21845 |
+| 44   | -21846 |  0  |  2729  |  21845 |
+| 44   | -21846 |  0  |  2730  |  21845 |
+| 44   | -21846 |  0  |  2731  |  21845 |
+| 44   | -21846 |  0  |  2732  |  21845 |
+| 44   | -21846 |  0  |  2733  |  21845 |
+| 44   | -21846 |  0  |  2734  |  21845 |
+| 44   | -21846 |  0  |  2735  | -21846 |
+| 44+  |  21845 |  1  |  2735  | -21846 |
+| 45   |  21845 |  1  |  2735  |  21845 |
+| 45+  |  21845 |  0  |  2728  |  21845 |
+| 46   |  21845 |  0  |  2728  |  21845 |
+| 46   |  21845 |  0  |  2729  |  21845 |
+| 46   |  21845 |  0  |  2730  |  21845 |
+| 46   |  21845 |  0  |  2731  |  21845 |
+| 46   |  21845 |  0  |  2732  |  21845 |
+| 46   |  21845 |  0  |  2733  |  21845 |
+| 46   |  21845 |  0  |  2734  |  21845 |
+| 46   |  21845 |  0  |  2735  |  21845 |
+| 46+  |  21845 |  0  |   341  |      0 |
+| 47   |  21845 |  0  |   341  |      0 |
+| 47   |  21845 |  0  |   853  |      0 |
+| 47   |  21845 |  0  |  1365  |      0 |
+| 47   |  21845 |  0  |  1877  |      0 |
+| 47   |  21845 |  0  |  2389  |      0 |
+| 47   |  21845 |  0  |  2901  |      0 |
+| 47   |  21845 |  0  |  3413  |      0 |
+| 47   |  21845 |  0  |  3925  |      0 |
+| 47+  |  21845 |  1  |   341  |      0 |
+| 48   |  21845 |  1  |   341  |  21845 |
+| 48+  |  21845 |  1  |   853  |      0 |
+| 49   |  21845 |  1  |   853  |  21845 |
+| 49+  |  21845 |  1  |  1365  |      0 |
+| 50   |  21845 |  1  |  1365  |  21845 |
+| 50+  |  21845 |  1  |  1877  |      0 |
+| 51   |  21845 |  1  |  1877  |  21845 |
+| 51+  |  21845 |  1  |  2389  |      0 |
+| 52   |  21845 |  1  |  2389  |  21845 |
+| 52+  |  21845 |  1  |  2901  |      0 |
+| 53   |  21845 |  1  |  2901  |  21845 |
+| 53+  |  21845 |  1  |  3413  |      0 |
+| 54   |  21845 |  1  |  3413  |  21845 |
+| 54+  |  21845 |  1  |  3925  |      0 |
+| 55   |  21845 |  1  |  3925  |  21845 |
+| 55+  |  21845 |  0  |   341  |  21845 |
+| 56   |  21845 |  0  |   341  |  21845 |
+| 56   |  21845 |  0  |   853  |  21845 |
+| 56   |  21845 |  0  |  1365  |  21845 |
+| 56   |  21845 |  0  |  1877  |  21845 |
+| 56   |  21845 |  0  |  2389  |  21845 |
+| 56   |  21845 |  0  |  2901  |  21845 |
+| 56   |  21845 |  0  |  3413  |  21845 |
+| 56   |  21845 |  0  |  3925  |  21845 |
+| 56+  | -21846 |  1  |   341  |  21845 |
+| 57   | -21846 |  1  |   341  | -21846 |
+| 57+  | -21846 |  0  |   341  | -21846 |
+| 58   | -21846 |  0  |   341  | -21846 |
+| 58   | -21846 |  0  |   853  |  21845 |
+| 58   | -21846 |  0  |  1365  |  21845 |
+| 58   | -21846 |  0  |  1877  |  21845 |
+| 58   | -21846 |  0  |  2389  |  21845 |
+| 58   | -21846 |  0  |  2901  |  21845 |
+| 58   | -21846 |  0  |  3413  |  21845 |
+| 58   | -21846 |  0  |  3925  |  21845 |
+| 58+  |  21845 |  1  |   341  | -21846 |
+| 59   |  21845 |  1  |   341  |  21845 |
+| 59+  | -21846 |  1  |   853  |  21845 |
+| 60   | -21846 |  1  |   853  | -21846 |
+| 60+  | -21846 |  0  |   341  |  21845 |
+| 61   | -21846 |  0  |   341  |  21845 |
+| 61   | -21846 |  0  |   853  | -21846 |
+| 61   | -21846 |  0  |  1365  |  21845 |
+| 61   | -21846 |  0  |  1877  |  21845 |
+| 61   | -21846 |  0  |  2389  |  21845 |
+| 61   | -21846 |  0  |  2901  |  21845 |
+| 61   | -21846 |  0  |  3413  |  21845 |
+| 61   | -21846 |  0  |  3925  |  21845 |
+| 61+  |  21845 |  1  |   853  | -21846 |
+| 62   |  21845 |  1  |   853  |  21845 |
+| 62+  | -21846 |  1  |  1365  |  21845 |
+| 63   | -21846 |  1  |  1365  | -21846 |
+| 63+  | -21846 |  0  |   341  |  21845 |
+| 64   | -21846 |  0  |   341  |  21845 |
+| 64   | -21846 |  0  |   853  |  21845 |
+| 64   | -21846 |  0  |  1365  | -21846 |
+| 64   | -21846 |  0  |  1877  |  21845 |
+| 64   | -21846 |  0  |  2389  |  21845 |
+| 64   | -21846 |  0  |  2901  |  21845 |
+| 64   | -21846 |  0  |  3413  |  21845 |
+| 64   | -21846 |  0  |  3925  |  21845 |
+| 64+  |  21845 |  1  |  1365  | -21846 |
+| 65   |  21845 |  1  |  1365  |  21845 |
+| 65+  | -21846 |  1  |  1877  |  21845 |
+| 66   | -21846 |  1  |  1877  | -21846 |
+| 66+  | -21846 |  0  |   341  |  21845 |
+| 67   | -21846 |  0  |   341  |  21845 |
+| 67   | -21846 |  0  |   853  |  21845 |
+| 67   | -21846 |  0  |  1365  |  21845 |
+| 67   | -21846 |  0  |  1877  | -21846 |
+| 67   | -21846 |  0  |  2389  |  21845 |
+| 67   | -21846 |  0  |  2901  |  21845 |
+| 67   | -21846 |  0  |  3413  |  21845 |
+| 67   | -21846 |  0  |  3925  |  21845 |
+| 67+  |  21845 |  1  |  1877  | -21846 |
+| 68   |  21845 |  1  |  1877  |  21845 |
+| 68+  | -21846 |  1  |  2389  |  21845 |
+| 69   | -21846 |  1  |  2389  | -21846 |
+| 69+  | -21846 |  0  |   341  |  21845 |
+| 70   | -21846 |  0  |   341  |  21845 |
+| 70   | -21846 |  0  |   853  |  21845 |
+| 70   | -21846 |  0  |  1365  |  21845 |
+| 70   | -21846 |  0  |  1877  |  21845 |
+| 70   | -21846 |  0  |  2389  | -21846 |
+| 70   | -21846 |  0  |  2901  |  21845 |
+| 70   | -21846 |  0  |  3413  |  21845 |
+| 70   | -21846 |  0  |  3925  |  21845 |
+| 70+  |  21845 |  1  |  2389  | -21846 |
+| 71   |  21845 |  1  |  2389  |  21845 |
+| 71+  | -21846 |  1  |  2901  |  21845 |
+| 72   | -21846 |  1  |  2901  | -21846 |
+| 72+  | -21846 |  0  |   341  |  21845 |
+| 73   | -21846 |  0  |   341  |  21845 |
+| 73   | -21846 |  0  |   853  |  21845 |
+| 73   | -21846 |  0  |  1365  |  21845 |
+| 73   | -21846 |  0  |  1877  |  21845 |
+| 73   | -21846 |  0  |  2389  |  21845 |
+| 73   | -21846 |  0  |  2901  | -21846 |
+| 73   | -21846 |  0  |  3413  |  21845 |
+| 73   | -21846 |  0  |  3925  |  21845 |
+| 73+  |  21845 |  1  |  2901  | -21846 |
+| 74   |  21845 |  1  |  2901  |  21845 |
+| 74+  | -21846 |  1  |  3413  |  21845 |
+| 75   | -21846 |  1  |  3413  | -21846 |
+| 75+  | -21846 |  0  |   341  |  21845 |
+| 76   | -21846 |  0  |   341  |  21845 |
+| 76   | -21846 |  0  |   853  |  21845 |
+| 76   | -21846 |  0  |  1365  |  21845 |
+| 76   | -21846 |  0  |  1877  |  21845 |
+| 76   | -21846 |  0  |  2389  |  21845 |
+| 76   | -21846 |  0  |  2901  |  21845 |
+| 76   | -21846 |  0  |  3413  | -21846 |
+| 76   | -21846 |  0  |  3925  |  21845 |
+| 76+  |  21845 |  1  |  3413  | -21846 |
+| 77   |  21845 |  1  |  3413  |  21845 |
+| 77+  | -21846 |  1  |  3925  |  21845 |
+| 78   | -21846 |  1  |  3925  | -21846 |
+| 78+  | -21846 |  0  |   341  |  21845 |
+| 79   | -21846 |  0  |   341  |  21845 |
+| 79   | -21846 |  0  |   853  |  21845 |
+| 79   | -21846 |  0  |  1365  |  21845 |
+| 79   | -21846 |  0  |  1877  |  21845 |
+| 79   | -21846 |  0  |  2389  |  21845 |
+| 79   | -21846 |  0  |  2901  |  21845 |
+| 79   | -21846 |  0  |  3413  |  21845 |
+| 79   | -21846 |  0  |  3925  | -21846 |
+| 79+  |  21845 |  1  |  3925  | -21846 |
+| 80   |  21845 |  1  |  3925  |  21845 |
+| 80+  |  21845 |  0  |   341  |  21845 |
+| 81   |  21845 |  0  |   341  |  21845 |
+| 81   |  21845 |  0  |   853  |  21845 |
+| 81   |  21845 |  0  |  1365  |  21845 |
+| 81   |  21845 |  0  |  1877  |  21845 |
+| 81   |  21845 |  0  |  2389  |  21845 |
+| 81   |  21845 |  0  |  2901  |  21845 |
+| 81   |  21845 |  0  |  3413  |  21845 |
+| 81   |  21845 |  0  |  3925  |  21845 |
diff --git a/projects/03/b/RAM512.hdl b/projects/03/b/RAM512.hdl
index 2db7ada..4d4981e 100644
--- a/projects/03/b/RAM512.hdl
+++ b/projects/03/b/RAM512.hdl
@@ -1,12 +1,12 @@
-// This file is part of the materials accompanying the book 
-// "The Elements of Computing Systems" by Nisan and Schocken, 
+// This file is part of the materials accompanying the book
+// "The Elements of Computing Systems" by Nisan and Schocken,
 // MIT Press. Book site: www.idc.ac.il/tecs
 // File name: projects/03/b/RAM512.hdl
 
 /**
  * Memory of 512 registers, each 16 bit-wide. Out holds the value
- * stored at the memory location specified by address. If load==1, then 
- * the in value is loaded into the memory location specified by address 
+ * stored at the memory location specified by address. If load==1, then
+ * the in value is loaded into the memory location specified by address
  * (the loaded value will be emitted to out from the next time step onward).
  */
 
@@ -15,5 +15,37 @@ CHIP RAM512 {
     OUT out[16];
 
     PARTS:
-    // Put your code here:
-}
\ No newline at end of file
+    // To flip things here, let's use the
+    // LSB to address the RAM64 modules
+    DMux8Way(in=load, sel=address[0..2],
+      a=load1,
+      b=load2,
+      c=load3,
+      d=load4,
+      e=load5,
+      f=load6,
+      g=load7,
+      h=load8);
+
+    // We use the MSB to index inside the RAM64s
+    RAM64(in=in, load=load1, address=address[3..8], out=out1);
+    RAM64(in=in, load=load2, address=address[3..8], out=out2);
+    RAM64(in=in, load=load3, address=address[3..8], out=out3);
+    RAM64(in=in, load=load4, address=address[3..8], out=out4);
+    RAM64(in=in, load=load5, address=address[3..8], out=out5);
+    RAM64(in=in, load=load6, address=address[3..8], out=out6);
+    RAM64(in=in, load=load7, address=address[3..8], out=out7);
+    RAM64(in=in, load=load8, address=address[3..8], out=out8);
+
+    // Now we use the LSB again to pick the correct RAM output
+    Mux8Way16(
+      a=out1,
+      b=out2,
+      c=out3,
+      d=out4,
+      e=out5,
+      f=out6,
+      g=out7,
+      h=out8,
+      sel=address[0..2], out=out);
+}
diff --git a/projects/03/b/RAM512.out b/projects/03/b/RAM512.out
new file mode 100644
index 0000000..b947117
--- /dev/null
+++ b/projects/03/b/RAM512.out
@@ -0,0 +1,320 @@
+| time |   in   |load |address|  out   |
+| 0+   |      0 |  0  |    0  |      0 |
+| 1    |      0 |  0  |    0  |      0 |
+| 1+   |      0 |  1  |    0  |      0 |
+| 2    |      0 |  1  |    0  |      0 |
+| 2+   |  13099 |  0  |    0  |      0 |
+| 3    |  13099 |  0  |    0  |      0 |
+| 3+   |  13099 |  1  |  130  |      0 |
+| 4    |  13099 |  1  |  130  |  13099 |
+| 4+   |  13099 |  0  |    0  |      0 |
+| 5    |  13099 |  0  |    0  |      0 |
+| 5+   |   4729 |  0  |  472  |      0 |
+| 6    |   4729 |  0  |  472  |      0 |
+| 6+   |   4729 |  1  |  472  |      0 |
+| 7    |   4729 |  1  |  472  |   4729 |
+| 7+   |   4729 |  0  |  472  |   4729 |
+| 8    |   4729 |  0  |  472  |   4729 |
+| 8    |   4729 |  0  |  130  |  13099 |
+| 8+   |   5119 |  0  |  130  |  13099 |
+| 9    |   5119 |  0  |  130  |  13099 |
+| 9+   |   5119 |  1  |  511  |      0 |
+| 10   |   5119 |  1  |  511  |   5119 |
+| 10+  |   5119 |  0  |  511  |   5119 |
+| 11   |   5119 |  0  |  511  |   5119 |
+| 11   |   5119 |  0  |  472  |   4729 |
+| 11   |   5119 |  0  |  511  |   5119 |
+| 11+  |   5119 |  0  |  168  |      0 |
+| 12   |   5119 |  0  |  168  |      0 |
+| 12   |   5119 |  0  |  169  |      0 |
+| 12   |   5119 |  0  |  170  |      0 |
+| 12   |   5119 |  0  |  171  |      0 |
+| 12   |   5119 |  0  |  172  |      0 |
+| 12   |   5119 |  0  |  173  |      0 |
+| 12   |   5119 |  0  |  174  |      0 |
+| 12   |   5119 |  0  |  175  |      0 |
+| 12+  |  21845 |  1  |  168  |      0 |
+| 13   |  21845 |  1  |  168  |  21845 |
+| 13+  |  21845 |  1  |  169  |      0 |
+| 14   |  21845 |  1  |  169  |  21845 |
+| 14+  |  21845 |  1  |  170  |      0 |
+| 15   |  21845 |  1  |  170  |  21845 |
+| 15+  |  21845 |  1  |  171  |      0 |
+| 16   |  21845 |  1  |  171  |  21845 |
+| 16+  |  21845 |  1  |  172  |      0 |
+| 17   |  21845 |  1  |  172  |  21845 |
+| 17+  |  21845 |  1  |  173  |      0 |
+| 18   |  21845 |  1  |  173  |  21845 |
+| 18+  |  21845 |  1  |  174  |      0 |
+| 19   |  21845 |  1  |  174  |  21845 |
+| 19+  |  21845 |  1  |  175  |      0 |
+| 20   |  21845 |  1  |  175  |  21845 |
+| 20+  |  21845 |  0  |  168  |  21845 |
+| 21   |  21845 |  0  |  168  |  21845 |
+| 21   |  21845 |  0  |  169  |  21845 |
+| 21   |  21845 |  0  |  170  |  21845 |
+| 21   |  21845 |  0  |  171  |  21845 |
+| 21   |  21845 |  0  |  172  |  21845 |
+| 21   |  21845 |  0  |  173  |  21845 |
+| 21   |  21845 |  0  |  174  |  21845 |
+| 21   |  21845 |  0  |  175  |  21845 |
+| 21+  | -21846 |  1  |  168  |  21845 |
+| 22   | -21846 |  1  |  168  | -21846 |
+| 22+  | -21846 |  0  |  168  | -21846 |
+| 23   | -21846 |  0  |  168  | -21846 |
+| 23   | -21846 |  0  |  169  |  21845 |
+| 23   | -21846 |  0  |  170  |  21845 |
+| 23   | -21846 |  0  |  171  |  21845 |
+| 23   | -21846 |  0  |  172  |  21845 |
+| 23   | -21846 |  0  |  173  |  21845 |
+| 23   | -21846 |  0  |  174  |  21845 |
+| 23   | -21846 |  0  |  175  |  21845 |
+| 23+  |  21845 |  1  |  168  | -21846 |
+| 24   |  21845 |  1  |  168  |  21845 |
+| 24+  | -21846 |  1  |  169  |  21845 |
+| 25   | -21846 |  1  |  169  | -21846 |
+| 25+  | -21846 |  0  |  168  |  21845 |
+| 26   | -21846 |  0  |  168  |  21845 |
+| 26   | -21846 |  0  |  169  | -21846 |
+| 26   | -21846 |  0  |  170  |  21845 |
+| 26   | -21846 |  0  |  171  |  21845 |
+| 26   | -21846 |  0  |  172  |  21845 |
+| 26   | -21846 |  0  |  173  |  21845 |
+| 26   | -21846 |  0  |  174  |  21845 |
+| 26   | -21846 |  0  |  175  |  21845 |
+| 26+  |  21845 |  1  |  169  | -21846 |
+| 27   |  21845 |  1  |  169  |  21845 |
+| 27+  | -21846 |  1  |  170  |  21845 |
+| 28   | -21846 |  1  |  170  | -21846 |
+| 28+  | -21846 |  0  |  168  |  21845 |
+| 29   | -21846 |  0  |  168  |  21845 |
+| 29   | -21846 |  0  |  169  |  21845 |
+| 29   | -21846 |  0  |  170  | -21846 |
+| 29   | -21846 |  0  |  171  |  21845 |
+| 29   | -21846 |  0  |  172  |  21845 |
+| 29   | -21846 |  0  |  173  |  21845 |
+| 29   | -21846 |  0  |  174  |  21845 |
+| 29   | -21846 |  0  |  175  |  21845 |
+| 29+  |  21845 |  1  |  170  | -21846 |
+| 30   |  21845 |  1  |  170  |  21845 |
+| 30+  | -21846 |  1  |  171  |  21845 |
+| 31   | -21846 |  1  |  171  | -21846 |
+| 31+  | -21846 |  0  |  168  |  21845 |
+| 32   | -21846 |  0  |  168  |  21845 |
+| 32   | -21846 |  0  |  169  |  21845 |
+| 32   | -21846 |  0  |  170  |  21845 |
+| 32   | -21846 |  0  |  171  | -21846 |
+| 32   | -21846 |  0  |  172  |  21845 |
+| 32   | -21846 |  0  |  173  |  21845 |
+| 32   | -21846 |  0  |  174  |  21845 |
+| 32   | -21846 |  0  |  175  |  21845 |
+| 32+  |  21845 |  1  |  171  | -21846 |
+| 33   |  21845 |  1  |  171  |  21845 |
+| 33+  | -21846 |  1  |  172  |  21845 |
+| 34   | -21846 |  1  |  172  | -21846 |
+| 34+  | -21846 |  0  |  168  |  21845 |
+| 35   | -21846 |  0  |  168  |  21845 |
+| 35   | -21846 |  0  |  169  |  21845 |
+| 35   | -21846 |  0  |  170  |  21845 |
+| 35   | -21846 |  0  |  171  |  21845 |
+| 35   | -21846 |  0  |  172  | -21846 |
+| 35   | -21846 |  0  |  173  |  21845 |
+| 35   | -21846 |  0  |  174  |  21845 |
+| 35   | -21846 |  0  |  175  |  21845 |
+| 35+  |  21845 |  1  |  172  | -21846 |
+| 36   |  21845 |  1  |  172  |  21845 |
+| 36+  | -21846 |  1  |  173  |  21845 |
+| 37   | -21846 |  1  |  173  | -21846 |
+| 37+  | -21846 |  0  |  168  |  21845 |
+| 38   | -21846 |  0  |  168  |  21845 |
+| 38   | -21846 |  0  |  169  |  21845 |
+| 38   | -21846 |  0  |  170  |  21845 |
+| 38   | -21846 |  0  |  171  |  21845 |
+| 38   | -21846 |  0  |  172  |  21845 |
+| 38   | -21846 |  0  |  173  | -21846 |
+| 38   | -21846 |  0  |  174  |  21845 |
+| 38   | -21846 |  0  |  175  |  21845 |
+| 38+  |  21845 |  1  |  173  | -21846 |
+| 39   |  21845 |  1  |  173  |  21845 |
+| 39+  | -21846 |  1  |  174  |  21845 |
+| 40   | -21846 |  1  |  174  | -21846 |
+| 40+  | -21846 |  0  |  168  |  21845 |
+| 41   | -21846 |  0  |  168  |  21845 |
+| 41   | -21846 |  0  |  169  |  21845 |
+| 41   | -21846 |  0  |  170  |  21845 |
+| 41   | -21846 |  0  |  171  |  21845 |
+| 41   | -21846 |  0  |  172  |  21845 |
+| 41   | -21846 |  0  |  173  |  21845 |
+| 41   | -21846 |  0  |  174  | -21846 |
+| 41   | -21846 |  0  |  175  |  21845 |
+| 41+  |  21845 |  1  |  174  | -21846 |
+| 42   |  21845 |  1  |  174  |  21845 |
+| 42+  | -21846 |  1  |  175  |  21845 |
+| 43   | -21846 |  1  |  175  | -21846 |
+| 43+  | -21846 |  0  |  168  |  21845 |
+| 44   | -21846 |  0  |  168  |  21845 |
+| 44   | -21846 |  0  |  169  |  21845 |
+| 44   | -21846 |  0  |  170  |  21845 |
+| 44   | -21846 |  0  |  171  |  21845 |
+| 44   | -21846 |  0  |  172  |  21845 |
+| 44   | -21846 |  0  |  173  |  21845 |
+| 44   | -21846 |  0  |  174  |  21845 |
+| 44   | -21846 |  0  |  175  | -21846 |
+| 44+  |  21845 |  1  |  175  | -21846 |
+| 45   |  21845 |  1  |  175  |  21845 |
+| 45+  |  21845 |  0  |  168  |  21845 |
+| 46   |  21845 |  0  |  168  |  21845 |
+| 46   |  21845 |  0  |  169  |  21845 |
+| 46   |  21845 |  0  |  170  |  21845 |
+| 46   |  21845 |  0  |  171  |  21845 |
+| 46   |  21845 |  0  |  172  |  21845 |
+| 46   |  21845 |  0  |  173  |  21845 |
+| 46   |  21845 |  0  |  174  |  21845 |
+| 46   |  21845 |  0  |  175  |  21845 |
+| 46+  |  21845 |  0  |   42  |      0 |
+| 47   |  21845 |  0  |   42  |      0 |
+| 47   |  21845 |  0  |  106  |      0 |
+| 47   |  21845 |  0  |  170  |  21845 |
+| 47   |  21845 |  0  |  234  |      0 |
+| 47   |  21845 |  0  |  298  |      0 |
+| 47   |  21845 |  0  |  362  |      0 |
+| 47   |  21845 |  0  |  426  |      0 |
+| 47   |  21845 |  0  |  490  |      0 |
+| 47+  |  21845 |  1  |   42  |      0 |
+| 48   |  21845 |  1  |   42  |  21845 |
+| 48+  |  21845 |  1  |  106  |      0 |
+| 49   |  21845 |  1  |  106  |  21845 |
+| 49+  |  21845 |  1  |  170  |  21845 |
+| 50   |  21845 |  1  |  170  |  21845 |
+| 50+  |  21845 |  1  |  234  |      0 |
+| 51   |  21845 |  1  |  234  |  21845 |
+| 51+  |  21845 |  1  |  298  |      0 |
+| 52   |  21845 |  1  |  298  |  21845 |
+| 52+  |  21845 |  1  |  362  |      0 |
+| 53   |  21845 |  1  |  362  |  21845 |
+| 53+  |  21845 |  1  |  426  |      0 |
+| 54   |  21845 |  1  |  426  |  21845 |
+| 54+  |  21845 |  1  |  490  |      0 |
+| 55   |  21845 |  1  |  490  |  21845 |
+| 55+  |  21845 |  0  |   42  |  21845 |
+| 56   |  21845 |  0  |   42  |  21845 |
+| 56   |  21845 |  0  |  106  |  21845 |
+| 56   |  21845 |  0  |  170  |  21845 |
+| 56   |  21845 |  0  |  234  |  21845 |
+| 56   |  21845 |  0  |  298  |  21845 |
+| 56   |  21845 |  0  |  362  |  21845 |
+| 56   |  21845 |  0  |  426  |  21845 |
+| 56   |  21845 |  0  |  490  |  21845 |
+| 56+  | -21846 |  1  |   42  |  21845 |
+| 57   | -21846 |  1  |   42  | -21846 |
+| 57+  | -21846 |  0  |   42  | -21846 |
+| 58   | -21846 |  0  |   42  | -21846 |
+| 58   | -21846 |  0  |  106  |  21845 |
+| 58   | -21846 |  0  |  170  |  21845 |
+| 58   | -21846 |  0  |  234  |  21845 |
+| 58   | -21846 |  0  |  298  |  21845 |
+| 58   | -21846 |  0  |  362  |  21845 |
+| 58   | -21846 |  0  |  426  |  21845 |
+| 58   | -21846 |  0  |  490  |  21845 |
+| 58+  |  21845 |  1  |   42  | -21846 |
+| 59   |  21845 |  1  |   42  |  21845 |
+| 59+  | -21846 |  1  |  106  |  21845 |
+| 60   | -21846 |  1  |  106  | -21846 |
+| 60+  | -21846 |  0  |   42  |  21845 |
+| 61   | -21846 |  0  |   42  |  21845 |
+| 61   | -21846 |  0  |  106  | -21846 |
+| 61   | -21846 |  0  |  170  |  21845 |
+| 61   | -21846 |  0  |  234  |  21845 |
+| 61   | -21846 |  0  |  298  |  21845 |
+| 61   | -21846 |  0  |  362  |  21845 |
+| 61   | -21846 |  0  |  426  |  21845 |
+| 61   | -21846 |  0  |  490  |  21845 |
+| 61+  |  21845 |  1  |  106  | -21846 |
+| 62   |  21845 |  1  |  106  |  21845 |
+| 62+  | -21846 |  1  |  170  |  21845 |
+| 63   | -21846 |  1  |  170  | -21846 |
+| 63+  | -21846 |  0  |   42  |  21845 |
+| 64   | -21846 |  0  |   42  |  21845 |
+| 64   | -21846 |  0  |  106  |  21845 |
+| 64   | -21846 |  0  |  170  | -21846 |
+| 64   | -21846 |  0  |  234  |  21845 |
+| 64   | -21846 |  0  |  298  |  21845 |
+| 64   | -21846 |  0  |  362  |  21845 |
+| 64   | -21846 |  0  |  426  |  21845 |
+| 64   | -21846 |  0  |  490  |  21845 |
+| 64+  |  21845 |  1  |  170  | -21846 |
+| 65   |  21845 |  1  |  170  |  21845 |
+| 65+  | -21846 |  1  |  234  |  21845 |
+| 66   | -21846 |  1  |  234  | -21846 |
+| 66+  | -21846 |  0  |   42  |  21845 |
+| 67   | -21846 |  0  |   42  |  21845 |
+| 67   | -21846 |  0  |  106  |  21845 |
+| 67   | -21846 |  0  |  170  |  21845 |
+| 67   | -21846 |  0  |  234  | -21846 |
+| 67   | -21846 |  0  |  298  |  21845 |
+| 67   | -21846 |  0  |  362  |  21845 |
+| 67   | -21846 |  0  |  426  |  21845 |
+| 67   | -21846 |  0  |  490  |  21845 |
+| 67+  |  21845 |  1  |  234  | -21846 |
+| 68   |  21845 |  1  |  234  |  21845 |
+| 68+  | -21846 |  1  |  298  |  21845 |
+| 69   | -21846 |  1  |  298  | -21846 |
+| 69+  | -21846 |  0  |   42  |  21845 |
+| 70   | -21846 |  0  |   42  |  21845 |
+| 70   | -21846 |  0  |  106  |  21845 |
+| 70   | -21846 |  0  |  170  |  21845 |
+| 70   | -21846 |  0  |  234  |  21845 |
+| 70   | -21846 |  0  |  298  | -21846 |
+| 70   | -21846 |  0  |  362  |  21845 |
+| 70   | -21846 |  0  |  426  |  21845 |
+| 70   | -21846 |  0  |  490  |  21845 |
+| 70+  |  21845 |  1  |  298  | -21846 |
+| 71   |  21845 |  1  |  298  |  21845 |
+| 71+  | -21846 |  1  |  362  |  21845 |
+| 72   | -21846 |  1  |  362  | -21846 |
+| 72+  | -21846 |  0  |   42  |  21845 |
+| 73   | -21846 |  0  |   42  |  21845 |
+| 73   | -21846 |  0  |  106  |  21845 |
+| 73   | -21846 |  0  |  170  |  21845 |
+| 73   | -21846 |  0  |  234  |  21845 |
+| 73   | -21846 |  0  |  298  |  21845 |
+| 73   | -21846 |  0  |  362  | -21846 |
+| 73   | -21846 |  0  |  426  |  21845 |
+| 73   | -21846 |  0  |  490  |  21845 |
+| 73+  |  21845 |  1  |  362  | -21846 |
+| 74   |  21845 |  1  |  362  |  21845 |
+| 74+  | -21846 |  1  |  426  |  21845 |
+| 75   | -21846 |  1  |  426  | -21846 |
+| 75+  | -21846 |  0  |   42  |  21845 |
+| 76   | -21846 |  0  |   42  |  21845 |
+| 76   | -21846 |  0  |  106  |  21845 |
+| 76   | -21846 |  0  |  170  |  21845 |
+| 76   | -21846 |  0  |  234  |  21845 |
+| 76   | -21846 |  0  |  298  |  21845 |
+| 76   | -21846 |  0  |  362  |  21845 |
+| 76   | -21846 |  0  |  426  | -21846 |
+| 76   | -21846 |  0  |  490  |  21845 |
+| 76+  |  21845 |  1  |  426  | -21846 |
+| 77   |  21845 |  1  |  426  |  21845 |
+| 77+  | -21846 |  1  |  490  |  21845 |
+| 78   | -21846 |  1  |  490  | -21846 |
+| 78+  | -21846 |  0  |   42  |  21845 |
+| 79   | -21846 |  0  |   42  |  21845 |
+| 79   | -21846 |  0  |  106  |  21845 |
+| 79   | -21846 |  0  |  170  |  21845 |
+| 79   | -21846 |  0  |  234  |  21845 |
+| 79   | -21846 |  0  |  298  |  21845 |
+| 79   | -21846 |  0  |  362  |  21845 |
+| 79   | -21846 |  0  |  426  |  21845 |
+| 79   | -21846 |  0  |  490  | -21846 |
+| 79+  |  21845 |  1  |  490  | -21846 |
+| 80   |  21845 |  1  |  490  |  21845 |
+| 80+  |  21845 |  0  |   42  |  21845 |
+| 81   |  21845 |  0  |   42  |  21845 |
+| 81   |  21845 |  0  |  106  |  21845 |
+| 81   |  21845 |  0  |  170  |  21845 |
+| 81   |  21845 |  0  |  234  |  21845 |
+| 81   |  21845 |  0  |  298  |  21845 |
+| 81   |  21845 |  0  |  362  |  21845 |
+| 81   |  21845 |  0  |  426  |  21845 |
+| 81   |  21845 |  0  |  490  |  21845 |