Added memory menu and some devel changes

1 files changed, 329 insertions, 0 deletions

diff --git a/src/memmenu.c b/src/memmenu.c
new file mode 100644
index 0000000..c2f5da7
--- /dev/null
+++ b/src/memmenu.c
@@ -0,0 +1,329 @@
+/*
+
+    ezx81 - X11 ZX81 emulator
+
+    Copyright (C) 2003  Ian Cowburn (ianc@noddybox.demon.co.uk)
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    -------------------------------------------------------------------------
+
+    Provides a common error exit point
+
+*/
+static const char ident[]="$Id$";
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "memmenu.h"
+#include "zx81.h"
+#include "gfx.h"
+#include "gui.h"
+
+#include <SDL.h>
+
+static const char ident_h[]=EZX81_MEMMENU_H;
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define WHITE	GFXRGB(255,255,255)
+#define BLACK	GFXRGB(0,0,0)
+#define RED	GFXRGB(255,100,100)
+#define GREEN	GFXRGB(100,255,100)
+#define BLUE	GFXRGB(100,100,255)
+
+#define MENU
+
+
+/* ---------------------------------------- PRIVATE FUNCTIONS
+*/
+static void Centre(const char *p, int y, Uint32 col)
+{
+    GFXPrint((320-strlen(p)*8)/2,y,col,"%s",p);
+}
+
+
+static void DisplayMenu(void)
+{
+    static const char *menu[]=
+    {
+    	"1. Disassemble/Hex dump",
+    	"2. Return              ",
+	NULL
+    };
+
+    int f;
+
+    GFXClear(BLACK);
+
+    Centre("MEMORY MENU",0,WHITE);
+    Centre("Select an option",8,WHITE);
+
+    f=0;
+
+    while(menu[f])
+    {
+    	Centre(menu[f],20+f*10,WHITE);
+	f++;
+    }
+}
+
+
+static const char *FlagString(Z80Byte flag)
+{
+    static char s[]="76543210";
+    static char c[]="SZ5H3PNC";
+    int f;
+
+    for(f=0;f<8;f++)
+        if (flag&(1<<(7-f)))
+            s[f]=c[f];
+        else
+            s[f]='-';
+
+    return s;
+}
+
+
+static int EnterAddress(Z80Word *w)
+{
+    unsigned long ul;
+    const char *p;
+
+    p=GUIInputString("Address?","");
+
+    if (*p)
+    {
+	ul=strtoul(p,NULL,0);
+
+	if (ul>0xffff)
+	{
+	    GUIMessage("ERROR","Bad address");
+	}
+	else
+	{
+	    *w=(Z80Word)ul;
+	    return TRUE;
+	}
+    }
+
+    return FALSE;
+}
+
+
+static void DoDisassem(Z80 *z80, const Z80State *s)
+{
+    static int hexmode=FALSE;
+    Z80Word pc=s->PC;
+    int quit=FALSE;
+
+    while(!quit)
+    {
+	SDL_Event *e;
+	Z80Word curr;
+	Z80Word next;
+	int f;
+
+	GFXClear(BLACK);
+
+    	Centre("Press F1 for help",0,RED);
+
+	curr=pc;
+
+	for(f=0;f<21;f++)
+	{
+	    char s[80];
+	    char *p;
+	    int y;
+
+	    y=16+f*8;
+
+	    GFXPrint(0,y,GREEN,"%4.4x",curr);
+
+	    if (hexmode)
+	    {
+		int n;
+
+	    	for(n=0;n<8;n++)
+		{
+		    GFXPrint(40+n*24,y,WHITE,"%2.2x",
+		    		(int)ZX81ReadForDisassem(z80,curr));
+
+		    curr++;
+		}
+	    }
+	    else
+	    {
+		strcpy(s,Z80Disassemble(z80,&curr));
+
+		p=strtok(s,";");
+		GFXPrint(40,y,WHITE,"%s",p);
+	    }
+
+	    if (f==0)
+		next=curr;
+	}
+
+	GFXEndFrame(FALSE);
+
+	e=GFXWaitKey();
+
+	switch(e->key.keysym.sym)
+	{
+	    case SDLK_F1:
+		GUIMessage
+		    ("DISASSEMBLY HELP","%s",
+		       "ESC - Exit\n"
+		       "H - Switch between disassembly/hex\n"
+		       "Enter - Enter address to display\n"
+		       "Cursor Up - Prev op\n"
+		       "Cursor Down - Next op\n"
+		       "Page Up - Move back a page\n"
+		       "Page Down - Move forward a page\n"
+		       "Cursor Left - Move PC by -1024\n"
+		       "Cursor Right - Move PC by 1024");
+		break;
+
+	    case SDLK_ESCAPE:
+	    	quit=TRUE;
+		break;
+
+	    case SDLK_h:
+		hexmode=!hexmode;
+	    	break;
+
+	    case SDLK_RETURN:
+	    case SDLK_KP_ENTER:
+		EnterAddress(&pc);
+	    	break;
+
+	    case SDLK_UP:
+		if (hexmode)
+		    pc-=8;
+		else
+		    pc--;
+	    	break;
+
+	    case SDLK_DOWN:
+		pc=next;
+	    	break;
+
+	    case SDLK_PAGEUP:
+		if (hexmode)
+		    pc-=21*8;
+		else
+		    pc-=21;
+		break;
+
+	    case SDLK_PAGEDOWN:
+	    	pc=curr;
+		break;
+
+	    case SDLK_LEFT:
+	    	pc-=1024;
+		break;
+
+	    case SDLK_RIGHT:
+	    	pc+=1024;
+		break;
+
+	    default:
+	    	break;
+	}
+    }
+}
+
+
+/* ---------------------------------------- EXPORTED INTERFACES
+*/
+void MemoryMenu(Z80 *z80)
+{
+    SDL_Event *e;
+    int quit=FALSE;
+    Z80State s;
+
+    Z80GetState(z80,&s);
+
+    GFXKeyRepeat(TRUE);
+
+    while(!quit)
+    {
+	DisplayMenu();
+	DisplayState(z80);
+	GFXEndFrame(FALSE);
+
+	e=GFXWaitKey();
+
+	switch(e->key.keysym.sym)
+	{
+	    case SDLK_1:
+	    	DoDisassem(z80,&s);
+		break;
+
+	    case SDLK_ESCAPE:
+	    case SDLK_2:
+	    	quit=TRUE;
+		break;
+
+	    default:
+	    	break;
+	}
+    }
+
+    GFXKeyRepeat(FALSE);
+}
+
+
+void DisplayState(Z80 *z80)
+{
+    Z80State s;
+    int y;
+
+    Z80GetState(z80,&s);
+
+    y=136;
+
+    GFXPrintPaper(0,y,RED,BLACK,"PC=%4.4x  A=%2.2x     F=%s",
+                    s.PC,s.AF>>8,FlagString(s.AF&0xff));
+    y+=8;
+
+    GFXPrintPaper(0,y,RED,BLACK,"BC=%4.4x  DE=%4.4x  HL=%4.4x",s.BC,s.DE,s.HL);
+    y+=8;
+
+    GFXPrintPaper(0,y,RED,BLACK,"IX=%4.4x  IY=%4.4x  SP=%4.4x",s.IX,s.IY,s.SP);
+    y+=8;
+
+    GFXPrintPaper(0,y,RED,BLACK,"I=%2.2x     IM=%2.2x    R=%2.2x",s.I,s.IM,s.R);
+    y+=8;
+
+    GFXPrintPaper(0,y,RED,BLACK,"IFF1=%2.2x  IFF2=%2.2x",s.IFF1,s.IFF2);
+    y+=8;
+
+    y+=8;
+    GFXPrintPaper(0,y,RED,BLACK,"%s\n",ZX81Info(z80));
+    y+=8;
+}
+
+
+
+
+/* END OF FILE */