From 066a82e93ca7ea3c26091035b1d0a7fe49485c3d Mon Sep 17 00:00:00 2001
From: Stephen Crane <jscrane@gmail.com>
Date: Sun, 24 Feb 2019 12:29:18 +0000
Subject: [PATCH] move parity into PROGMEM

---
 i8080.cpp | 6 +++---
 i8080.h   | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/i8080.cpp b/i8080.cpp
index 0352d23..7e2d54d 100644
--- a/i8080.cpp
+++ b/i8080.cpp
@@ -84,7 +84,7 @@ void i8080::daa() {
 	flags.C = c;
 }
 
-int i8080::parity_table[] = {
+const uint8_t parity_table[] PROGMEM = {
 	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
 	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
 	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
@@ -103,8 +103,8 @@ int i8080::parity_table[] = {
 	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
 };
 
-i8080::i8080(Memory &m, PortDevice<i8080> &d): CPU(m), _ports(&d)
-{
+uint8_t parity_tbl(uint8_t r) {
+	return pgm_read_byte(parity_table + r);
 }
 
 void i8080::_op(uint8_t op) {
diff --git a/i8080.h b/i8080.h
index f2bd1e3..87bb9c9 100644
--- a/i8080.h
+++ b/i8080.h
@@ -5,9 +5,11 @@
 #undef PC
 #undef SP
 
+uint8_t parity_tbl(uint8_t);
+
 class i8080: public CPU {
 public:
-	i8080(Memory &, PortDevice<i8080> &);
+	i8080(Memory &m, PortDevice<i8080> &d): CPU(m), _ports(&d) {}
 
 	void run(unsigned);
 	void reset();
@@ -62,8 +64,6 @@ private:
 
 	void _op(uint8_t op);
 
-	static int parity_table[256];
-
 	inline uint16_t _rw(Memory::address a) {
 		return _mem[a] + (_mem[a+1] << 8);
 	}
@@ -76,7 +76,7 @@ private:
 	inline void _szp(uint8_t r) {
 		flags.S = ((r & 0x80) != 0);
 		flags.Z = (r == 0);
-		flags.P = parity_table[r];
+		flags.P = parity_tbl(r);
 	}
 
 	inline void _szhp(uint8_t b, uint8_t r) {