From 6220948f30b0abe230ed9f93491bd7b83fba5246 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Sun, 25 Dec 2022 08:50:46 +0000
Subject: Fixed BIT documented.  Still not passing undocumented.

---
 z80_decode.c  | 16 ++++++++--------
 z80_private.h |  1 +
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/z80_decode.c b/z80_decode.c
index 0a9ba00..f675fc5 100644
--- a/z80_decode.c
+++ b/z80_decode.c
@@ -443,14 +443,14 @@ do { \
     cpu->AF.b.lo&=C_Z80; \
     if ((REG)&(1<<B)) \
     { \
-	if (B==7) cpu->AF.b.lo|=S_Z80; \
-        cpu->AF.b.lo|=(REG & (B3_Z80|B5_Z80)); \
+	cpu->AF.b.lo|=S_Z80&REG; \
     } \
     else \
     { \
-	cpu->AF.b.lo|=Z_Z80; \
-	cpu->AF.b.lo|=P_Z80; \
+	cpu->AF.b.lo|=Z_Z80|P_Z80; \
     } \
+    cpu->AF.b.lo|=H_Z80; \
+    SETHIDDEN(REG); \
 } while(0)
 
 #define BIT_MEMPTR(REG,B) \
@@ -458,14 +458,14 @@ do { \
     cpu->AF.b.lo&=C_Z80; \
     if ((REG)&(1<<B)) \
     { \
-	if (B==7) cpu->AF.b.lo|=S_Z80; \
-        cpu->AF.b.lo|=(PRIV->memptr.b.hi & (B3_Z80|B5_Z80)); \
+	cpu->AF.b.lo|=S_Z80&REG; \
     } \
     else \
     { \
-	cpu->AF.b.lo|=Z_Z80; \
-	cpu->AF.b.lo|=P_Z80; \
+	cpu->AF.b.lo|=Z_Z80|P_Z80; \
     } \
+    cpu->AF.b.lo|=H_Z80; \
+    SETHIDDEN(PRIV->memptr.b.hi); \
 } while(0)
 
 #define BIT_SET(REG,B) (REG)|=(1<<B)
diff --git a/z80_private.h b/z80_private.h
index b052c04..2583766 100644
--- a/z80_private.h
+++ b/z80_private.h
@@ -118,6 +118,7 @@ extern Z80Byte	Z80_MEMORY[];
 
 #define B3_Z80			0x08
 #define B5_Z80			0x20
+#define HIDDEN_Z80              (B3_Z80|B5_Z80)
 
 
 #define SET(v,b)		(v)|=b
-- 
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