feat: new instructions

examples/sdl/src/main.rs

@@ -80,10 +80,12 @@ fn main() {
 
     let mut game_boy = GameBoy::new();
     game_boy.load_boot_dmg();
+    game_boy.load_rom_file("../../res/roms.prop/tetris.gb");
     //game_boy.load_rom_file("../../res/roms/firstwhite.gb");
     //game_boy.load_rom_file("../../res/roms/opus5.gb");
     //game_boy.load_rom_file("../../res/roms/ld_r_r.gb");
-    game_boy.load_rom_file("../../res/roms/special.gb");
+    //game_boy.load_rom_file("../../res/roms/special.gb");
+    //game_boy.load_rom_file("../../res/roms/firstwhite.gb");
 
     let mut counter = 0;
 

src/cpu.rs

+use core::panic;
+
 use crate::{
     inst::{EXTENDED, INSTRUCTIONS},
     mmu::Mmu,
@@ -303,6 +305,11 @@ impl Cpu {
         self.halted = true;
     }
 
+    #[inline(always)]
+    pub fn stop(&mut self) {
+        panic!("STOP is not implemented");
+    }
+
     #[inline(always)]
     pub fn enable_int(&mut self) {
         // @todo implement this one

src/inst.rs

@@ -19,7 +19,7 @@ pub const INSTRUCTIONS: [(fn(&mut Cpu), u8, &'static str); 256] = [
     (ld_c_u8, 8, "LD C, u8"),
     (noimpl, 4, "! UNIMP !"),
     // 0x1 opcodes
-    (noimpl, 4, "! UNIMP !"),
+    (stop, 4, "STOP"),
     (ld_de_u16, 12, "LD DE, u16"),
     (ld_mde_a, 8, "LD [DE], A"),
     (inc_de, 8, "INC DE"),
@@ -62,7 +62,7 @@ pub const INSTRUCTIONS: [(fn(&mut Cpu), u8, &'static str); 256] = [
     (ld_mhl_u8, 12, "LD [HL], u8 "),
     (scf, 4, "SCF"),
     (jr_c_i8, 8, "JR C, i8"),
-    (noimpl, 4, "! UNIMP !"),
+    (add_hl_sp, 8, "ADD HL, SP"),
     (noimpl, 4, "! UNIMP !"),
     (noimpl, 4, "! UNIMP !"),
     (inc_a, 4, "INC A"),
@@ -656,6 +656,10 @@ fn ld_c_u8(cpu: &mut Cpu) {
     cpu.c = byte;
 }
 
+fn stop(cpu: &mut Cpu) {
+    cpu.stop();
+}
+
 fn ld_de_u16(cpu: &mut Cpu) {
     let word = cpu.read_u16();
     cpu.set_de(word);
@@ -923,6 +927,11 @@ fn jr_c_i8(cpu: &mut Cpu) {
     cpu.ticks = cpu.ticks.wrapping_add(4);
 }
 
+fn add_hl_sp(cpu: &mut Cpu) {
+    let value = add_u16_u16(cpu, cpu.hl(), cpu.sp());
+    cpu.set_hl(value);
+}
+
 fn inc_a(cpu: &mut Cpu) {
     let value = cpu.a.wrapping_add(1);
 

src/mmu.rs

@@ -51,9 +51,9 @@ impl Mmu {
                 }
                 self.rom[addr as usize]
             }
-            // ROM0 (12 KB/16 KB)
+            // ROM 0 (12 KB/16 KB)
             0x1000 | 0x2000 | 0x3000 => self.rom[addr as usize],
-            // ROM1 (Unbanked) (16 KB)
+            // ROM 1 (Unbanked) (16 KB)
             0x4000 | 0x5000 | 0x6000 | 0x7000 => self.rom[addr as usize],
             // Graphics: VRAM (8 KB)
             0x8000 | 0x9000 => self.ppu.vram[(addr & 0x1fff) as usize],
@@ -99,15 +99,15 @@ impl Mmu {
             // BOOT (256 B) + ROM0 (4 KB/16 KB)
             0x0000 => {
                 self.rom[addr as usize] = value;
-                println!("Writing to BOOT at 0x{:04x}", addr)
+                panic!("Writing to BOOT at 0x{:04x}", addr)
             }
-            // ROM0 (12 KB/16 KB)
+            // ROM 0 (12 KB/16 KB)
             0x1000 | 0x2000 | 0x3000 => {
-                println!("Writing to ROM 0 at 0x{:04x}", addr);
+                panic!("Writing to ROM 0 at 0x{:04x}", addr);
             }
-            // ROM1 (Unbanked) (16 KB)
+            // ROM 1 (Unbanked) (16 KB)
             0x4000 | 0x5000 | 0x6000 | 0x7000 => {
-                println!("Writing to ROM 1 at 0x{:04x}", addr);
+                panic!("Writing to ROM 1 at 0x{:04x}", addr);
             }
             // Graphics: VRAM (8 KB)
             0x8000 | 0x9000 => {