diff --git a/deps/teagba/include/teagba/addresses.hpp b/deps/teagba/include/teagba/addresses.hpp
index 23380b12..6b2e5e20 100644
--- a/deps/teagba/include/teagba/addresses.hpp
+++ b/deps/teagba/include/teagba/addresses.hpp
@@ -54,25 +54,41 @@ inline volatile BgCtl &regBgCtl(uintptr_t const bgIdx) noexcept {
 }
 
 // background horizontal scrolling registers
-#define REG_BG0HOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0010))
-#define REG_BG1HOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0014))
-#define REG_BG2HOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0018))
-#define REG_BG3HOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'001c))
+#define REG_BG0HOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0010))
+#define REG_BG1HOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0014))
+#define REG_BG2HOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0018))
+#define REG_BG3HOFS (*reinterpret_cast<volatile int16_t*>(0x0400'001c))
 
 [[nodiscard]]
-volatile uint32_t &regBgHofs(auto const bgIdx) noexcept {
-	return *reinterpret_cast<volatile uint32_t*>(0x0400'0010 + 4 * bgIdx);
+volatile int16_t &regBgHofs(auto const bgIdx) noexcept {
+	return *reinterpret_cast<volatile int16_t*>(0x0400'0010 + 4 * bgIdx);
 }
 
 // background vertical scrolling registers
-#define REG_BG0VOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0012))
-#define REG_BG1VOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0016))
-#define REG_BG2VOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'001a))
-#define REG_BG3VOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'001e))
+#define REG_BG0VOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0012))
+#define REG_BG1VOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0016))
+#define REG_BG2VOFS (*reinterpret_cast<volatile int16_t*>(0x0400'001a))
+#define REG_BG3VOFS (*reinterpret_cast<volatile int16_t*>(0x0400'001e))
 
 [[nodiscard]]
-volatile uint32_t &regBgVofs(auto const bgIdx) noexcept {
-	return *reinterpret_cast<volatile uint32_t*>(0x0400'0012 + 4 * bgIdx);
+volatile int16_t &regBgVofs(auto const bgIdx) noexcept {
+	return *reinterpret_cast<volatile int16_t*>(0x0400'0012 + 4 * bgIdx);
+}
+
+// background scrolling registers
+
+struct OffsetPair {
+	int16_t x{}, y{};
+};
+
+#define REG_BG0OFS (*reinterpret_cast<volatile OffsetPair*>(0x0400'0010))
+#define REG_BG1OFS (*reinterpret_cast<volatile OffsetPair*>(0x0400'0014))
+#define REG_BG2OFS (*reinterpret_cast<volatile OffsetPair*>(0x0400'0018))
+#define REG_BG3OFS (*reinterpret_cast<volatile OffsetPair*>(0x0400'001c))
+
+[[nodiscard]]
+volatile OffsetPair &regBgOfs(auto const bgIdx) noexcept {
+	return *reinterpret_cast<volatile OffsetPair*>(0x0400'0010 + sizeof(OffsetPair) * bgIdx);
 }
 
 /////////////////////////////////////////////////////////////////
diff --git a/deps/teagba/include/teagba/gfx.hpp b/deps/teagba/include/teagba/gfx.hpp
index bd18bb3f..4a252122 100644
--- a/deps/teagba/include/teagba/gfx.hpp
+++ b/deps/teagba/include/teagba/gfx.hpp
@@ -41,4 +41,8 @@ void addSpriteUpdate(GbaSpriteAttrUpdate const &upd) noexcept;
 
 void applySpriteUpdates() noexcept;
 
+void setBgOffset(uint16_t bg, int16_t x, int16_t y) noexcept;
+
+void scrollBgOffset(uint16_t bg, int16_t x, int16_t y) noexcept;
+
 }
diff --git a/deps/teagba/src/gfx.cpp b/deps/teagba/src/gfx.cpp
index b458eeff..cd1e38b3 100644
--- a/deps/teagba/src/gfx.cpp
+++ b/deps/teagba/src/gfx.cpp
@@ -12,7 +12,7 @@ namespace teagba {
 
 static ox::Array<GbaSpriteAttrUpdate, 128> g_spriteBuffer;
 
-GbaSpriteAttrUpdate &spriteAttr(size_t i) noexcept {
+GbaSpriteAttrUpdate &spriteAttr(size_t const i) noexcept {
 	return g_spriteBuffer[i];
 }
 
@@ -29,4 +29,16 @@ void applySpriteUpdates() noexcept {
 	}
 }
 
+void setBgOffset(uint16_t const bg, int16_t const x, int16_t const y) noexcept {
+	auto &o = regBgOfs(bg);
+	o.x = x;
+	o.y = y;
+}
+
+void scrollBgOffset(uint16_t const bg, int16_t const x, int16_t const y) noexcept {
+	auto &o = regBgOfs(bg);
+	o.x = o.x + x;
+	o.y = o.y + y;
+}
+
 }