diff --git a/lib/src/processor/memory/mmio/cgb/vram_dma.rs b/lib/src/processor/memory/mmio/cgb/vram_dma.rs
index 9432eb1..c098261 100644
--- a/lib/src/processor/memory/mmio/cgb/vram_dma.rs
+++ b/lib/src/processor/memory/mmio/cgb/vram_dma.rs
@@ -86,22 +86,27 @@ where
         let returning = if let Some(cgb_peripherals) = &mut self.cgb_peripherals {
             match cgb_peripherals.vram_dma.mode {
                 DmaMode::Halt(l) => {
+                    let length = 16 * ((l as u16) + 1);
                     copy = Some((
-                        cgb_peripherals.vram_dma.destination,
                         cgb_peripherals.vram_dma.source,
-                        16 * ((l as u16) + 1),
+                        cgb_peripherals.vram_dma.destination,
+                        length,
                     ));
+                    cgb_peripherals.vram_dma.source += length;
+                    cgb_peripherals.vram_dma.destination += length;
                     cgb_peripherals.vram_dma.mode = DmaMode::Waiting;
                     ((l as usize) + 1) * 8
                 }
                 DmaMode::Hblank(l, ref mut progress) => {
                     if self.gpu.get_mode() == DrawMode::HBlank {
-                        let offset = *progress * 16;
+                        let length = 16;
                         copy = Some((
-                            cgb_peripherals.vram_dma.destination + offset,
-                            cgb_peripherals.vram_dma.source + offset,
-                            16,
+                            cgb_peripherals.vram_dma.source,
+                            cgb_peripherals.vram_dma.destination,
+                            length,
                         ));
+                        cgb_peripherals.vram_dma.source += length;
+                        cgb_peripherals.vram_dma.destination += length;
                         *progress += 1;
                         if *progress > (l as u16) {
                             cgb_peripherals.vram_dma.mode = DmaMode::Waiting
@@ -118,7 +123,7 @@ where
         };
         if let Some((source, dest, length)) = copy {
             for i in 0..length {
-                self.set(dest + i, self.get(source + i));
+                self.set(source + i, self.get(dest + i));
             }
         }
         if self.is_double_speed() {