From 824655e7f37cac76ecbdbb66566599ac85138ffe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Magalh=C3=A3es?= <joamag@gmail.com>
Date: Sat, 2 Jul 2022 23:29:58 +0100
Subject: [PATCH] fest: more instructions
---
src/inst.rs | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/src/inst.rs b/src/inst.rs
index c1b64f12..0aba58f9 100644
--- a/src/inst.rs
+++ b/src/inst.rs
@@ -48,7 +48,7 @@ pub const INSTRUCTIONS: [(fn(&mut Cpu), u8, &'static str); 256] = [
(noimpl, 4, "! UNIMP !"),
(ld_a_mhli, 8, "LD A, [HL+] "),
(noimpl, 4, "! UNIMP !"),
- (noimpl, 4, "! UNIMP !"),
+ (inc_l, 4, "INC L"),
(noimpl, 4, "! UNIMP !"),
(ld_l_u8, 8, "LD L, u8"),
(cpl, 4, "CPL"),
@@ -267,7 +267,7 @@ pub const INSTRUCTIONS: [(fn(&mut Cpu), u8, &'static str); 256] = [
(noimpl, 4, "! UNIMP !"),
(noimpl, 4, "! UNIMP !"),
(noimpl, 4, "! UNIMP !"),
- (noimpl, 4, "! UNIMP !"),
+ (ld_a_mu16, 16, "LD A [u16]"),
(ei, 4, "EI"),
(noimpl, 4, "! UNIMP !"),
(noimpl, 4, "! UNIMP !"),
@@ -701,6 +701,16 @@ fn ld_a_mhli(cpu: &mut Cpu) {
cpu.set_hl(cpu.hl().wrapping_add(1));
}
+fn inc_l(cpu: &mut Cpu) {
+ let value = cpu.l.wrapping_add(1);
+
+ cpu.set_sub(false);
+ cpu.set_zero(value == 0);
+ cpu.set_half_carry((value & 0xf) == 0xf);
+
+ cpu.l = value;
+}
+
fn ld_l_u8(cpu: &mut Cpu) {
let byte = cpu.read_u8();
cpu.l = byte;
@@ -968,6 +978,12 @@ fn push_af(cpu: &mut Cpu) {
cpu.push_word(cpu.af());
}
+fn ld_a_mu16(cpu: &mut Cpu) {
+ let word = cpu.read_u16();
+ let byte = cpu.mmu.read(word);
+ cpu.a = byte;
+}
+
fn ei(cpu: &mut Cpu) {
cpu.enable_int();
}
--
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