diff --git a/notes b/notes
index da6cd1a..f2e5551 100644
--- a/notes
+++ b/notes
@@ -46,3 +46,22 @@ mov 420, [A]    --  imm idr  --  mem[ip + 1] <- mem[A]
 add $13, $32    --  ida ida  --  mem[13] <- mem[13] + mem[32]
 inc A, 14       --  reg imm  --  A <- A + 1  |  Z <- (A == 14)   # Cursed zero flag
 
+
+
+---------------
+--  Signals  --
+---------------
+
+IR_W        --  level  --  D_BUS -> IR
+LATCH_PC    --  edge   --  PC_MUX -> PC, PC_MUX is either PC++ or from branch logic, see SEL_PC_LOAD
+SEL_PC_LOAD --  mux    --  Selects between PC++ or branch logic, feeds PC register
+PC_BUF      --  level  --  PC -> A_BUS
+MAR_W       --  level  --  A_BUS -> MEM_A
+MBR_W       --  level  --  MEM_D -> D_BUS or D_BUS -> MEM_D depending on MBR_W
+MEM_R       --  level  --  Put mem[MEM_A] on MEM_D
+IN_SEL      --  bus    --  Selects register to write to
+A_SEL       --  bus    --  Selects "A"(first operand) register
+B_SEL       --  bus    --  Selects "B"(second operand) register
+REG_WR      --  edge   --  regs[IN_SEL] <- REG_D_IN
+REG_A_RD    --  level  --  A_OUT <- regs[A_SEL]
+REG_B_RD    --  level  --  B_OUT <- regs[B_SEL]