From 29eb97170cf9f87f6695bfeff8d964f1fa7ed6d4 Mon Sep 17 00:00:00 2001
From: Andre Weissflog <floooh@gmail.com>
Date: Fri, 12 Jul 2024 13:39:38 +0200
Subject: [PATCH] add a Z80.init function

---
 src/chips/z80.zig        | 4 ++++
 src/systems/bombjack.zig | 4 ++--
 src/systems/namco.zig    | 2 +-
 tests/z80int.zig         | 2 +-
 tests/z80test.zig        | 2 +-
 tests/z80timing.zig      | 2 +-
 tests/z80zex.zig         | 2 +-
 7 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/chips/z80.zig b/src/chips/z80.zig
index f25f152..c7cf9ed 100644
--- a/src/chips/z80.zig
+++ b/src/chips/z80.zig
@@ -174,6 +174,10 @@ pub fn Z80(comptime P: Pins, comptime Bus: anytype) type {
         de2: u16 = 0xFFFF,
         hl2: u16 = 0xFFFF,
 
+        pub fn init() Self {
+            return .{};
+        }
+
         pub fn prefetch(self: *Self, addr: u16) void {
             self.pc = addr;
             self.step = 0;
diff --git a/src/systems/bombjack.zig b/src/systems/bombjack.zig
index ae46141..0af1409 100644
--- a/src/systems/bombjack.zig
+++ b/src/systems/bombjack.zig
@@ -269,7 +269,7 @@ pub const Bombjack = struct {
     pub fn initInPlace(self: *Self, opts: Options) void {
         self.* = .{
             .main_board = .{
-                .cpu = .{},
+                .cpu = Z80.init(),
                 .vsync_count = VSYNC_PERIOD_4MHZ,
                 .mem = Memory.init(.{
                     .junk_page = &self.junk_page,
@@ -278,7 +278,7 @@ pub const Bombjack = struct {
                 .palette = std.mem.zeroes(@TypeOf(self.main_board.palette)),
             },
             .sound_board = .{
-                .cpu = .{},
+                .cpu = Z80.init(),
                 .psg0 = Psg0.init(.{
                     .tick_hz = PSG_FREQUENCY,
                     .sound_hz = @intCast(opts.audio.sample_rate),
diff --git a/src/systems/namco.zig b/src/systems/namco.zig
index b5aa478..9a14f90 100644
--- a/src/systems/namco.zig
+++ b/src/systems/namco.zig
@@ -430,7 +430,7 @@ pub fn Namco(comptime sys: System) type {
 
         pub fn initInPlace(self: *Self, opts: Options) void {
             self.* = .{
-                .cpu = .{},
+                .cpu = Z80.init(),
                 .mem = Memory.init(.{
                     .junk_page = &self.junk_page,
                     .unmapped_page = &self.unmapped_page,
diff --git a/tests/z80int.zig b/tests/z80int.zig
index 5fda0d5..cf2f6b2 100644
--- a/tests/z80int.zig
+++ b/tests/z80int.zig
@@ -75,7 +75,7 @@ fn copy(start_addr: u16, bytes: []const u8) void {
 fn init(start_addr: u16, bytes: []const u8) void {
     mem = std.mem.zeroes(@TypeOf(mem));
     bus = 0;
-    cpu = Z80{};
+    cpu = Z80.init();
     copy(start_addr, bytes);
     cpu.prefetch(start_addr);
 }
diff --git a/tests/z80test.zig b/tests/z80test.zig
index df632dd..0523142 100644
--- a/tests/z80test.zig
+++ b/tests/z80test.zig
@@ -56,7 +56,7 @@ fn ok() void {
 fn init(start_addr: u16, bytes: []const u8) void {
     mem = std.mem.zeroes(@TypeOf(mem));
     bus = 0;
-    cpu = Z80{};
+    cpu = Z80.init();
     cpu.r[Z80.F] = 0;
     cpu.af2 = 0xFF00;
     cpu.bc2 = 0xFFFF;
diff --git a/tests/z80timing.zig b/tests/z80timing.zig
index 96d7924..9644623 100644
--- a/tests/z80timing.zig
+++ b/tests/z80timing.zig
@@ -151,7 +151,7 @@ fn copy(start_addr: u16, bytes: []const u8) void {
 fn init(bytes: []const u8) void {
     mem = std.mem.zeroes(@TypeOf(mem));
     bus = 0;
-    cpu = Z80{};
+    cpu = Z80.init();
     copy(0, bytes);
     cpu.prefetch(0);
 }
diff --git a/tests/z80zex.zig b/tests/z80zex.zig
index 4203213..51962ac 100644
--- a/tests/z80zex.zig
+++ b/tests/z80zex.zig
@@ -71,7 +71,7 @@ fn cpmBDOS() void {
 
 // run the currently configured test
 fn runTest() u64 {
-    cpu = Z80{};
+    cpu = Z80.init();
     cpu.setSP(0xF000);
     cpu.prefetch(0x0100);
     const bdos_call: Bus = Z80.setAddr(M1 | MREQ | RD, 0x0005);