From: Matthijs Kooijman <m.kooijman@student.utwente.nl>
Date: Thu, 29 Jan 2009 10:36:34 +0000 (+0100)
Subject: Add some comments.
X-Git-Url: https://git.stderr.nl/gitweb?p=matthijs%2Fmaster-project%2Fc%CE%BBash.git;a=commitdiff_plain;h=844555bd28c13cfe1bcb450960008e81928fe2c5

Add some comments.
---

diff --git a/Adders.hs b/Adders.hs
index c398578..f29927c 100644
--- a/Adders.hs
+++ b/Adders.hs
@@ -10,18 +10,18 @@ show_add f = do print ("Sum:   " ++ (displaysigs s)); print ("Carry: " ++ (displ
     b = [Low, Low, Low, High]
     (s, c) = f (a, b)
 
--- Combinatoric no-carry adder
+-- Combinatoric stateless no-carry adder
 -- A -> B -> S
 no_carry_adder :: (Bit, Bit) -> Bit
 no_carry_adder (a, b) = a `hwxor` b
 
--- Combinatoric half adder
+-- Combinatoric stateless half adder
 -- A -> B -> (S, C)
 half_adder :: (Bit, Bit) -> (Bit, Bit)
 half_adder (a, b) = 
   ( a `hwxor` b, a `hwand` b )
 
--- Combinatoric (one-bit) full adder
+-- Combinatoric stateless full adder
 -- (A, B, C) -> (S, C)
 full_adder :: (Bit, Bit, Bit) -> (Bit, Bit)
 full_adder (a, b, cin) = (s, c)
diff --git a/Alu.hs b/Alu.hs
index 2495df2..59e5fd5 100644
--- a/Alu.hs
+++ b/Alu.hs
@@ -16,8 +16,7 @@ program = [
 
 initial_state = ((Low, High), (), Low, Low)
 
---
---
+-- Register bank
 
 type RegAddr = Bit
 type RegisterBankState = (Bit, Bit)
@@ -40,6 +39,8 @@ register_bank (addr, High, d) s = -- Write
     r1' = if addr == High then d else r1
     s' = (r0', r1')
 
+-- ALU
+
 type AluState = ()
 type AluOp = Bit