From 5106ea51907aa9f6a15070041fefd820671cc4ed Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Thu, 19 Mar 2020 22:51:10 +0000
Subject: First attempt at display routine.  Still keyboard handling to do.

---
 src/Makefile |  7 ++++--
 src/czx81.c  | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+), 2 deletions(-)

diff --git a/src/Makefile b/src/Makefile
index 8deb3e5..9fc766e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -21,6 +21,9 @@ TARGET=czx81
 #	ncursesw
 CURSES=-lncurses
 
+# For debug build
+#CFLAGS+=-g
+
 OBJS=	czx81.o		\
 	z80.o		\
 	z80_decode.o	\
@@ -29,12 +32,12 @@ OBJS=	czx81.o		\
 	zx81rom.o
 
 $(TARGET): $(OBJS)
-	$(CC) -o $(TARGET) $(OBJS) $(CURSES)
+	$(CC) $(CFLAGS) -o $(TARGET) $(OBJS) $(CURSES)
 
 clean:
 	rm -f $(TARGET) $(OBJS) core
 
-czx81.o: czx81.c wide_curses.h
+czx81.o: czx81.c wide_curses.h z80.h z80_config.h zx81rom.h
 stream.o: stream.c stream.h
 z80.o: z80.c z80.h z80_config.h z80_private.h stream.h
 z80_decode.o: z80_decode.c z80.h z80_config.h z80_private.h
diff --git a/src/czx81.c b/src/czx81.c
index 6ba48a8..1e50c5c 100644
--- a/src/czx81.c
+++ b/src/czx81.c
@@ -83,6 +83,26 @@ static Z80		*z80;
 
 static Z80Byte		matrix[8];
 
+static wchar_t		scrcode[0x40] =
+{
+	L' ', L'\u2598', L'\u259d', L'\u2580', 		/* 00 - 03 */		
+	L'\u2596', L'\u258c', L'\u259e', L'\u259b', 	/* 04 - 07 */		
+	L'\u2592', L'\u2584', L'\u2580', L'"', 		/* 08 - 0b */		
+	L'\u00a3', L'$', L':', L'?', 			/* 0c - 0f */		
+	L'(', L')', L'>', L'<', 			/* 10 - 13 */		
+	L'=', L'+', L'-', L'*', 			/* 14 - 17 */		
+	L'/', L';', L',', L'.', 			/* 18 - 1b */		
+	L'0', L'1', L'2', L'3',				/* 1c - 1f */
+	L'4', L'5', L'6', L'7',				/* 20 - 23 */
+	L'8', L'9', L'A', L'B',				/* 24 - 27 */
+	L'C', L'D', L'E', L'F',				/* 28 - 2b */
+	L'G', L'H', L'I', L'J',				/* 2c - 2f */
+	L'K', L'L', L'M', L'N',				/* 30 - 33 */
+	L'O', L'P', L'Q', L'R',				/* 34 - 37 */
+	L'S', L'T', L'U', L'V',				/* 38 - 3b */
+	L'W', L'X', L'Y', L'Z',				/* 3c - 3f */
+};
+
 
 /* -------------------------------------------------- ZX81 CODE
 */
@@ -420,6 +440,60 @@ static void ZX81Init(void)
 }
 
 
+static void DrawScreen(void)
+{
+    int fast;
+    int x,y;
+
+    fast = (FRAME_TSTATES == FAST_TSTATES);
+
+    if (fast)
+    {
+    	for(y = 0; y < TXT_H; y++)
+	{
+	    for(x = 0; x < TXT_W; x++)
+	    {
+	    	mvprintw(y, x, "%lc", L'\u2592');
+	    }
+	}
+    }
+    else
+    {
+	Z80Byte *scr;
+
+	scr = mem + PEEKW(DFILE);
+	y = 0;
+
+	while(y < TXT_H)
+	{
+	    scr++;
+	    x = 0;
+
+	    while(*scr != 118 && x < TXT_W)
+	    {
+	    	Z80Byte ch = *scr++;
+
+		if (ch & 0x80)
+		{
+		    attron(A_REVERSE);
+		}
+
+		mvprintw(y, x, "%lc", scrcode[ch & 0x3f]);
+
+		if (ch & 0x80)
+		{
+		    attroff(A_REVERSE);
+		}
+
+	    	x++;
+	    }
+
+	    y++;
+	}
+    }
+}
+
+
 /* -------------------------------------------------- UTILS
 */
 static long TimeDiff(const struct timespec *start,
@@ -475,6 +549,8 @@ int main(void)
 
 	clear();
 
+	DrawScreen();
+
 	ch = getch();
 
 	if (ch == 3)
-- 
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