Added basic GFX wrapper

1 files changed, 21 insertions, 14 deletions

diff --git a/src/zx81.c b/src/zx81.c
index 59b5960..9fa09f6 100644
--- a/src/zx81.c
+++ b/src/zx81.c
@@ -29,9 +29,10 @@ static const char ident[]="$Id$";
 #include <stdio.h>
 #include <string.h>
 #include "zx81.h"
+#include "config.h"
 #include "exit.h"
 
-static const char ident_h[]=EZX81_ZX81_H;
+static const char ident_h[]=EZX81ZX81H;
 
 
 /* ---------------------------------------- STATICS
@@ -40,6 +41,11 @@ static const int	ROMLEN=0x2000;
 static const int	ROM_SAVE=0x2fc;
 static const int	ROM_LOAD=0x347;
 
+/* These assume a 320x200 screen
+*/
+static const int	OFF_X=(320-256)/2;
+static const int	OFF_Y=(200-192)/2;
+
 static Z80Byte		mem[0x10000];
 
 static Z80Word		RAMBOT=0;
@@ -56,16 +62,13 @@ void ULA_Video_Shifter(Z80 *z80, Z80Byte val)
 
 /* ---------------------------------------- EXPORTED INTERFACES
 */
-void ZX81_Init(void)
+void ZX81Init(void)
 {
-    /* TODO: Config for ROM
-    */
-    const char rom[]="/files/emu/ROM/zx81.rom";
     FILE *fp;
     Z80Word f;
 
-    if (!(fp=fopen(rom,"rb")))
-    	Exit("Failed to open ZX81 ROM - %s\n",rom);
+    if (!(fp=fopen(SConfig(CONF_ROMFILE),"rb")))
+    	Exit("Failed to open ZX81 ROM - %s\n",SConfig(CONF_ROMFILE));
 
     if (fread(mem,1,ROMLEN,fp)!=ROMLEN)
     {
@@ -79,9 +82,13 @@ void ZX81_Init(void)
 
     RAMBOT=0x4000;
 
-    /* TODO: Memory size (1 or 16K)
+    /* Memory size (1 or 16K)
     */
-    RAMLEN=0x2000;
+    if (IConfig(CONF_MEMSIZE)==16)
+	RAMLEN=0x2000;
+    else
+	RAMLEN=0x400;
+
     RAMTOP=RAMBOT+RAMLEN;
 
     for(f=RAMBOT;f<=RAMTOP;f++)
@@ -89,7 +96,7 @@ void ZX81_Init(void)
 }
 
 
-Z80Byte ZX81_ReadMem(Z80 *z80, Z80Word addr)
+Z80Byte ZX81ReadMem(Z80 *z80, Z80Word addr)
 {
     /* Memory reads above 32K invoke the ULA
     */
@@ -125,25 +132,25 @@ Z80Byte ZX81_ReadMem(Z80 *z80, Z80Word addr)
 }
 
 
-void ZX81_WriteMem(Z80 *z80, Z80Word addr, Z80Byte val)
+void ZX81WriteMem(Z80 *z80, Z80Word addr, Z80Byte val)
 {
     if (addr>=RAMBOT && addr<=RAMTOP)
 	mem[addr&0x7fff]=val;
 }
 
 
-Z80Byte ZX81_ReadPort(Z80 *z80, Z80Word port)
+Z80Byte ZX81ReadPort(Z80 *z80, Z80Word port)
 {
     return 0;
 }
 
 
-void ZX81_WritePort(Z80 *z80, Z80Word port, Z80Byte val)
+void ZX81WritePort(Z80 *z80, Z80Word port, Z80Byte val)
 {
 }
 
 
-Z80Byte ZX81_ReadForDisassem(Z80 *z80, Z80Word addr)
+Z80Byte ZX81ReadForDisassem(Z80 *z80, Z80Word addr)
 {
     return mem[addr&0x7fff];
 }