feat: new instructions

examples/sdl/src/main.rs

@@ -79,9 +79,9 @@ fn main() {
         .unwrap();
 
     let mut game_boy = GameBoy::new();
-    game_boy.load_boot_static();
-    game_boy.load_rom_file("../../res/roms/firstwhite.gb");
-    //game_boy.load_rom_file("../../res/roms/opus5.gb");
+    game_boy.load_boot_dmg();
+    //game_boy.load_rom_file("../../res/roms/firstwhite.gb");
+    game_boy.load_rom_file("../../res/roms/opus5.gb");
 
     let mut counter = 0;
 

src/data.rs

 /// Static data corresponding to the DMG boot ROM
 /// allows freely using the emulator without external dependency.
-pub const DMB_BOOT: [u8; 256] = [
+pub const DMG_BOOT: [u8; 256] = [
     49, 254, 255, 175, 33, 255, 159, 50, 203, 124, 32, 251, 33, 38, 255, 14, 17, 62, 128, 50, 226,
     12, 62, 243, 226, 50, 62, 119, 119, 62, 252, 224, 71, 17, 4, 1, 33, 16, 128, 26, 205, 149, 0,
     205, 150, 0, 19, 123, 254, 52, 32, 243, 17, 216, 0, 6, 8, 26, 19, 34, 35, 5, 32, 249, 62, 25,

src/gb.rs

 use crate::{
     cpu::Cpu,
-    data::SGB_BOOT,
+    data::{SGB_BOOT, DMG_BOOT},
     mmu::Mmu,
     ppu::{Ppu, FRAME_BUFFER_SIZE},
     util::read_file,
@@ -68,7 +68,11 @@ impl GameBoy {
         self.load_boot_file("./res/boot/dmg_boot.bin");
     }
 
-    pub fn load_boot_static(&mut self) {
+    pub fn load_boot_dmg(&mut self) {
+        self.load_boot(&DMG_BOOT);
+    }
+
+    pub fn load_boot_sgb(&mut self) {
         self.load_boot(&SGB_BOOT);
     }
 

src/inst.rs

@@ -12,7 +12,7 @@ pub const INSTRUCTIONS: [(fn(&mut Cpu), u8, &'static str); 256] = [
     (rlca, 4, "RLCA"),
     (ld_mu16_sp, 20, "LD [u16], SP"),
     (add_hl_bc, 8, "ADD HL, BC"),
-    (noimpl, 4, "! UNIMP !"),
+    (ld_a_mbc, 8, "LD A, [BC]"),
     (dec_bc, 8, "DEC BC"),
     (inc_c, 4, "INC C"),
     (dec_c, 4, "DEC C"),
@@ -78,12 +78,12 @@ pub const INSTRUCTIONS: [(fn(&mut Cpu), u8, &'static str); 256] = [
     (noimpl, 4, "! UNIMP !"),
     (ld_b_mhl, 8, "LD B, [HL]"),
     (ld_b_a, 4, "LD B, A"),
-    (noimpl, 4, "! UNIMP !"),
-    (noimpl, 4, "! UNIMP !"),
-    (noimpl, 4, "! UNIMP !"),
-    (noimpl, 4, "! UNIMP !"),
-    (noimpl, 4, "! UNIMP !"),
-    (noimpl, 4, "! UNIMP !"),
+    (ld_c_b, 4, "LD C, B"),
+    (ld_c_c, 4, "LD C, C"),
+    (ld_c_d, 4, "LD C, D"),
+    (ld_c_e, 4, "LD C, E"),
+    (ld_c_h, 4, "LD C, H"),
+    (ld_c_l, 4, "LD C, L"),
     (ld_c_mhl, 8, "LD C, [HL]"),
     (ld_c_a, 4, "LD C, A"),
     // 0x5 opcodes
@@ -617,6 +617,11 @@ fn add_hl_bc(cpu: &mut Cpu) {
     cpu.set_hl(value);
 }
 
+fn ld_a_mbc(cpu: &mut Cpu) {
+    let byte = cpu.mmu.read(cpu.bc());
+    cpu.a = byte;
+}
+
 fn dec_bc(cpu: &mut Cpu) {
     cpu.set_bc(cpu.bc().wrapping_sub(1));
 }
@@ -948,6 +953,30 @@ fn ld_b_a(cpu: &mut Cpu) {
     cpu.b = cpu.a;
 }
 
+fn ld_c_b(cpu: &mut Cpu) {
+    cpu.c = cpu.b;
+}
+
+fn ld_c_c(cpu: &mut Cpu) {
+    cpu.c = cpu.c;
+}
+
+fn ld_c_d(cpu: &mut Cpu) {
+    cpu.c = cpu.d;
+}
+
+fn ld_c_e(cpu: &mut Cpu) {
+    cpu.c = cpu.e;
+}
+
+fn ld_c_h(cpu: &mut Cpu) {
+    cpu.c = cpu.h;
+}
+
+fn ld_c_l(cpu: &mut Cpu) {
+    cpu.c = cpu.l;
+}
+
 fn ld_c_mhl(cpu: &mut Cpu) {
     let byte = cpu.mmu.read(cpu.hl());
     cpu.c = byte;