From 8eb5ab7755f23362b5fd230b1ef5708cd10f65a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Magalh=C3=A3es?= <joamag@gmail.com>
Date: Tue, 28 Jun 2022 18:50:14 +0100
Subject: [PATCH] feat: added LD A, [DE]
---
examples/sdl/src/main.rs | 2 +-
src/cpu.rs | 7 ++++++-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/examples/sdl/src/main.rs b/examples/sdl/src/main.rs
index 118f5845..77da12f8 100644
--- a/examples/sdl/src/main.rs
+++ b/examples/sdl/src/main.rs
@@ -6,7 +6,7 @@ fn main() {
for _ in 0..40000 {
game_boy.clock();
- if game_boy.cpu().pc() >= 0x0023 {
+ if game_boy.cpu().pc() >= 0x0032 {
break;
}
}
diff --git a/src/cpu.rs b/src/cpu.rs
index 2433f107..439b3783 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -31,7 +31,7 @@ pub const INSTRUCTIONS: [(fn(&mut Cpu), u8, &'static str); 256] = [
(nop, 4, "NOP"),
(nop, 4, "NOP"),
(nop, 4, "NOP"),
- (nop, 4, "NOP"),
+ (ld_a_mde, 8, "LD A, [DE]"),
(nop, 4, "NOP"),
(nop, 4, "NOP"),
(nop, 4, "NOP"),
@@ -736,6 +736,11 @@ fn ld_de_u16(cpu: &mut Cpu) {
cpu.set_de(word);
}
+fn ld_a_mde(cpu: &mut Cpu) {
+ let byte = cpu.mmu.read(cpu.de());
+ cpu.a = byte;
+}
+
fn jr_nz_i8(cpu: &mut Cpu) {
let byte = cpu.read_u8() as i8;
--
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