chore: initial Bees code structure

src/lib.rs

@@ -15,6 +15,7 @@ pub mod pad;
 pub mod ppu;
 pub mod rom;
 pub mod serial;
+pub mod state;
 pub mod test;
 pub mod timer;
 pub mod util;

src/state.rs

+#[repr(packed)]
+pub struct BeesBlock {
+    pub magic: u32,
+    pub size: u32,
+}
+
+#[repr(packed)]
+pub struct BeesBuffer {
+    pub size: u32,
+    pub offset: u32,
+}
+
+#[repr(packed)]
+pub struct BeesFooter {
+    pub start_offset: u32,
+    pub magic: u32,
+}
+
+#[repr(packed)]
+pub struct BeesCore {
+    pub header: BeesBlock,
+
+    pub major: u16,
+    pub minor: u16,
+
+    pub model: u32,
+
+    pub pc: u16,
+    pub af: u16,
+    pub bc: u16,
+    pub de: u16,
+    pub hl: u16,
+    pub sp: u16,
+
+    pub ime: u8,
+    pub ie: u8,
+    // 0 = running; 1 = halted; 2 = stopped
+    pub execution_mode: u8,
+    _padding: u8,
+
+    pub io_registers: [u8; 0x80],
+
+    pub ram: BeesBuffer,
+    pub vram: BeesBuffer,
+    pub mbc_ram: BeesBuffer,
+    pub oam: BeesBuffer,
+    pub hram: BeesBuffer,
+    pub background_palettes: BeesBuffer,
+    pub object_palettes: BeesBuffer,
+}