From be91260b33fddc27d7ad8e60d934bf1aaf3c8469 Mon Sep 17 00:00:00 2001
From: Lokathor <zefria@gmail.com>
Date: Sun, 1 Jan 2023 18:01:23 -0700
Subject: [PATCH] palbank function

---
 src/mmio.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/mmio.rs b/src/mmio.rs
index 6690c30..23a31d1 100644
--- a/src/mmio.rs
+++ b/src/mmio.rs
@@ -201,6 +201,19 @@ def_mmio!(0x0500_0000 = BACKDROP_COLOR: VolAddress<Color, Safe, Safe>; "Color th
 def_mmio!(0x0500_0000 = BG_PALETTE: VolBlock<Color, Safe, Safe, 256>; "Background tile palette entries.");
 def_mmio!(0x0500_0200 = OBJ_PALETTE: VolBlock<Color, Safe, Safe, 256>; "Object tile palette entries.");
 
+#[inline]
+#[must_use]
+pub const fn bg_palbank(bank: usize) -> VolBlock<Color, Safe, Safe, 16> {
+  let u = BG_PALETTE.index(bank * 16).as_usize();
+  unsafe { VolBlock::new(u) }
+}
+#[inline]
+#[must_use]
+pub const fn obj_palbank(bank: usize) -> VolBlock<Color, Safe, Safe, 16> {
+  let u = OBJ_PALETTE.index(bank * 16).as_usize();
+  unsafe { VolBlock::new(u) }
+}
+
 // Video RAM (VRAM)
 
 /// The VRAM byte offset per screenblock index.