diff --git a/main.cpp b/main.cpp
index e39a8db..d41dcc4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -81,7 +81,7 @@ int main(int argc, char *argv[])
 
     SDL_Init(SDL_INIT_EVERYTHING);
     z80debug::init();
-    zxscreen::init();
+    zxscreen::init(0x4000, 0x5800);
 
     ui::menu::init();
     ui::menu::setexitcallback(actions::exitMenu);
diff --git a/zx_screen.cpp b/zx_screen.cpp
index 7b47ac4..ba96ca9 100644
--- a/zx_screen.cpp
+++ b/zx_screen.cpp
@@ -33,6 +33,9 @@ namespace zxscreen
 
     int pixels_draw = 0;
 
+    uint16_t pixel_base_addr = 0x4000;
+    uint16_t color_base_addr = 0x5800;
+
     uint16_t pixel_addr[69888];
     uint16_t color_addr[69888];
     uint8_t zx_pixels[352*296];
@@ -175,8 +178,15 @@ namespace zxscreen
         focus();
     }
 
-    void init()
+    void setBaseAddresses(const uint16_t pixeladdr, const uint16_t coloraddr)
     {
+        pixel_base_addr = pixeladdr;
+        color_base_addr = coloraddr;
+    }
+
+    void init(const uint16_t pixeladdr, const uint16_t coloraddr)
+    {
+        setBaseAddresses(pixeladdr, coloraddr);
         create_tables();
         reinit();
     }
@@ -203,13 +213,13 @@ namespace zxscreen
                     *(ptr_pixel++) = border_color;
                     *(ptr_pixel++) = border_color;
                 } else {
-                    uint8_t color = z80mem::get()->readMem(0x5800+color_addr[t_screen]);
+                    uint8_t color = z80mem::get()->readMem(color_base_addr + color_addr[t_screen]);
                     uint8_t c1 = color&0x7, c2 = (color>>3)&0x7;
                     if ((color&0x80) && flash) { c1=c2; c2=color&0x7; }
                     if ((color&0x40)) { c1 |= 0x8; c2 |= 0x8; }
                     uint16_t address = /*(0x4000) |*/ (pixel_addr[t_screen]&0x1FFF);
                     uint8_t mask = 1 << (pixel_addr[t_screen]>>13);
-                    uint8_t block = z80mem::get()->readMem(0x4000 + address);
+                    uint8_t block = z80mem::get()->readMem(pixel_base_addr + address);
                     *(ptr_pixel++)=(block&mask) ? c1 : c2;
                     mask>>=1;
                     *(ptr_pixel++)=(block&mask) ? c1 : c2;
diff --git a/zx_screen.h b/zx_screen.h
index 269a701..6b4790e 100644
--- a/zx_screen.h
+++ b/zx_screen.h
@@ -3,7 +3,8 @@
 
 namespace zxscreen
 {
-    void init();
+    void init(const uint16_t pixeladdr, const uint16_t coloraddr);
+    void setBaseAddresses(const uint16_t pixeladdr, const uint16_t coloraddr);
     void reinit();
     void focus();
     void refresh(const uint32_t dt, const bool full=false);