diff --git a/src/nostalgia/modules/gfx/src/gfx-gba.cpp b/src/nostalgia/modules/gfx/src/gfx-gba.cpp
index faea11bd..ad67b35b 100644
--- a/src/nostalgia/modules/gfx/src/gfx-gba.cpp
+++ b/src/nostalgia/modules/gfx/src/gfx-gba.cpp
@@ -35,11 +35,6 @@ class Context {
 		Context(Context const &&other) noexcept = delete;
 		virtual ~Context() noexcept = default;
 
-		[[nodiscard]]
-		ox::MemFS const &rom() const noexcept {
-			return static_cast<ox::MemFS const&>(*turbine::rom(turbineCtx));
-		}
-
 };
 
 void safeDelete(Context *ctx) noexcept {
@@ -81,7 +76,7 @@ ox::Error loadBgPalette(
 	if (palette.pages.empty()) {
 		return {};
 	}
-	auto const paletteMem = MEM_BG_PALETTE + palBank * 16;
+	auto const paletteMem = ox::Span{MEM_BG_PALETTE} + palBank * 16;
 	for (auto i = 0u; i < colorCnt(palette, page); ++i) {
 		paletteMem[i] = color(palette, page, i);
 	}
@@ -95,9 +90,8 @@ ox::Error loadSpritePalette(
 	if (palette.pages.empty()) {
 		return {};
 	}
-	auto const paletteMem = MEM_SPRITE_PALETTE;
 	for (auto i = 0u; i < colorCnt(palette, page); ++i) {
-		paletteMem[i] = color(palette, page, i);
+		MEM_SPRITE_PALETTE[i] = color(palette, page, i);
 	}
 	return {};
 }
@@ -240,7 +234,7 @@ ox::Error loadSpriteTileSheet(
 		Context &ctx,
 		TileSheetSet const &set) noexcept {
 	auto const bpp = static_cast<unsigned>(set.bpp);
-	OX_RETURN_ERROR(loadTileSheetSet(ctx, {MEM_SPRITE_TILES, 32 * ox::units::KB}, set));
+	OX_RETURN_ERROR(loadTileSheetSet(ctx, MEM_SPRITE_TILES, set));
 	setSpritesBpp(bpp);
 	return {};
 }
@@ -349,9 +343,9 @@ void panic(char const *file, int line, char const *panicMsg, ox::Error const &er
 	using namespace nostalgia::gfx;
 	// reset heap to make sure we have enough memory to allocate context data
 	OX_ALLOW_UNSAFE_BUFFERS_BEGIN
-	auto const heapBegin = reinterpret_cast<char*>(MEM_EWRAM_BEGIN);
-	auto const heapSz = (MEM_EWRAM_END - MEM_EWRAM_BEGIN) / 2;
-	auto const heapEnd = reinterpret_cast<char*>(MEM_EWRAM_BEGIN + heapSz);
+	auto const heapBegin = reinterpret_cast<char*>(MEM_EWRAM.data());
+	auto const heapSz = MEM_EWRAM.size() / 2;
+	auto const heapEnd = reinterpret_cast<char*>(MEM_EWRAM.data() + heapSz);
 	ox::heapmgr::initHeap(heapBegin, heapEnd);
 	OX_ALLOW_UNSAFE_BUFFERS_END
 	auto tctx = turbine::init(keel::loadRomFs("").unwrap(), "Nostalgia").unwrap();
diff --git a/src/olympic/turbine/src/gba/turbine.cpp b/src/olympic/turbine/src/gba/turbine.cpp
index df24c0ed..e8706d02 100644
--- a/src/olympic/turbine/src/gba/turbine.cpp
+++ b/src/olympic/turbine/src/gba/turbine.cpp
@@ -50,7 +50,7 @@ OX_ALLOW_UNSAFE_BUFFERS_BEGIN
 	constexpr auto headerP1Len = ox::strlen(headerP2);
 	constexpr auto headerP2Len = ox::strlen(headerP1);
 	constexpr auto headerLen = headerP1Len + headerP2Len;
-	for (auto current = MEM_ROM; current < reinterpret_cast<char*>(0x0a000000); current += headerLen) {
+	for (auto current = MEM_ROM.data(); current < reinterpret_cast<char*>(0x0a000000); current += headerLen) {
 		if (memcmp(current, headerP1, headerP1Len) == 0 &&
 		    memcmp(current + headerP1Len, headerP2, headerP2Len) == 0) {
 			return reinterpret_cast<std::size_t>(current + headerLen);