diff --git a/z80.cpp b/z80.cpp
index ce37fd7..394a3e2 100644
--- a/z80.cpp
+++ b/z80.cpp
@@ -136,7 +136,7 @@ void z80::daa() {
 	else
 		_add(a);
 	flags.C = c;
-	flags.P = parity_table[A];
+	flags.P = parity_table(A);
 }
 
 void z80::_step_idx(OP_IDX ops[]) {
@@ -641,7 +641,7 @@ void z80::ed() {
 		c = b + C + 1;
 		flags.N = (b & 0x80) != 0;
 		flags.C = flags.H = (c < b);
-		flags.P = parity_table[(c & 0x07) ^ B];
+		flags.P = parity_table((c & 0x07) ^ B);
 		_sz35(B);
 		break;
 	case 0xa3:
@@ -653,7 +653,7 @@ void z80::ed() {
 		c = b + L;
 		flags.N = (b & 0x80) != 0;
 		flags.C = flags.H = (c < b);
-		flags.P = parity_table[(c & 0x07) ^ B];
+		flags.P = parity_table((c & 0x07) ^ B);
 		_sz35(B);
 		break;
 	case 0xa8:
@@ -694,7 +694,7 @@ void z80::ed() {
 		c = b + C - 1;
 		flags.N = (b & 0x80) != 0;
 		flags.C = flags.H = (c < b);
-		flags.P = parity_table[(c & 0x07) ^ B];
+		flags.P = parity_table((c & 0x07) ^ B);
 		_sz35(B);
 		break;
 	case 0xab:
@@ -706,7 +706,7 @@ void z80::ed() {
 		c = b + L;
 		flags.N = (b & 0x80) != 0;
 		flags.C = flags.H = (c < b);
-		flags.P = parity_table[(c & 0x07) ^ B];
+		flags.P = parity_table((c & 0x07) ^ B);
 		_sz35(B);
 		break;
 	case 0xb0:
@@ -758,7 +758,7 @@ void z80::ed() {
 		c = b + flags.C + 1;
 		flags.N = (c & 0x80) != 0;
 		flags.C = flags.H = (c < b);
-		flags.P = parity_table[(c & 0x07) ^ B];
+		flags.P = parity_table((c & 0x07) ^ B);
 		_sz35(B);
 		if (B) {
 			_mc(HL, 1); _mc(HL, 1); _mc(HL, 1);
@@ -776,7 +776,7 @@ void z80::ed() {
 		c = b + L;
 		flags.N = (b & 0x80) != 0;
 		flags.C = flags.H = (c < b);
-		flags.P = parity_table[(c & 0x07) ^ B];
+		flags.P = parity_table((c & 0x07) ^ B);
 		_sz35(B);
 		if (B) {
 			_mc(BC, 1); _mc(BC, 1); _mc(BC, 1);
@@ -829,7 +829,7 @@ void z80::ed() {
 		c = b + flags.C + 1;
 		flags.N = (c & 0x80) != 0;
 		flags.C = flags.H = (c < b);
-		flags.P = parity_table[(c & 0x07) ^ B];
+		flags.P = parity_table((c & 0x07) ^ B);
 		_sz35(B);
 		if (B) {
 			_mc(HL, 1); _mc(HL, 1); _mc(HL, 1);
@@ -847,7 +847,7 @@ void z80::ed() {
 		c = b + L;
 		flags.N = (b & 0x80) != 0;
 		flags.C = flags.H = (c < b);
-		flags.P = parity_table[(c & 0x07) ^ B];
+		flags.P = parity_table((c & 0x07) ^ B);
 		_sz35(B);
 		if (B) {
 			_mc(BC, 1); _mc(BC, 1); _mc(BC, 1);
@@ -858,25 +858,19 @@ void z80::ed() {
 	}
 }
 
-int z80::parity_table[] = {
-	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,
-	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,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	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,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	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,
-	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,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
+const uint8_t partab[] PROGMEM = {
+	0x69, 0x96, 0x96, 0x69, 0x96, 0x69, 0x69, 0x96,
+	0x96, 0x69, 0x69, 0x96, 0x69, 0x96, 0x96, 0x69,
+	0x96, 0x69, 0x69, 0x96, 0x69, 0x96, 0x96, 0x69,
+	0x69, 0x96, 0x96, 0x69, 0x96, 0x69, 0x69, 0x96,
 };
 
+uint8_t z80::parity_table(uint8_t r) {
+	uint8_t i = r / 8, b = pgm_read_byte(partab + i);
+	uint8_t m = (1 << (r % 8));
+	return m == (b & m);
+}
+
 z80::z80(Memory &m, PortDevice<z80> &ports): CPU(m)
 {
 	_ports = &ports;
diff --git a/z80.h b/z80.h
index 048051a..c3316aa 100644
--- a/z80.h
+++ b/z80.h
@@ -144,7 +144,7 @@ private:
 	OP _ops[256], _cb[256];
 	OP_IDX _ddcb[256], _fdcb[256];
 
-	static int parity_table[256];
+	uint8_t parity_table(uint8_t);
 
 	inline uint8_t _rb(Memory::address a) {
 #if defined(CPU_DEBUG)
@@ -211,7 +211,7 @@ private:
 
 	inline void _szp35(uint8_t r) {
 		_sz35(r);
-		flags.P = parity_table[r];
+		flags.P = parity_table(r);
 	}
 
 	inline void _inc(uint8_t &b) {