From 60680a36e22aa97db7411b17bece37adb430f4c7 Mon Sep 17 00:00:00 2001
From: Rekai Musuka <rekai@musuka.dev>
Date: Fri, 21 Oct 2022 05:13:00 -0300
Subject: [PATCH] fix: account for lateness in RTC scheduler event

---
 src/core/bus/GamePak.zig | 4 ++--
 src/core/scheduler.zig   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/core/bus/GamePak.zig b/src/core/bus/GamePak.zig
index b75d934..7bfde15 100644
--- a/src/core/bus/GamePak.zig
+++ b/src/core/bus/GamePak.zig
@@ -505,8 +505,8 @@ pub const Clock = struct {
         cpu.sched.push(.RealTimeClock, 1 << 24); // Every Second
     }
 
-    pub fn updateTime(self: *This) void {
-        self.cpu.sched.push(.RealTimeClock, 1 << 24); // Reschedule
+    pub fn updateTime(self: *This, late: u64) void {
+        self.cpu.sched.push(.RealTimeClock, (1 << 24) -| late); // Reschedule
 
         const now = DateTime.now();
         self.year = toBcd(u8, @intCast(u8, now.date.year - 2000));
diff --git a/src/core/scheduler.zig b/src/core/scheduler.zig
index af6989c..4c96c3b 100644
--- a/src/core/scheduler.zig
+++ b/src/core/scheduler.zig
@@ -66,7 +66,7 @@ pub const Scheduler = struct {
                     if (device.kind != .Rtc or device.ptr == null) return;
 
                     const clock = @ptrCast(*Clock, @alignCast(@alignOf(*Clock), device.ptr.?));
-                    clock.updateTime();
+                    clock.updateTime(late);
                 },
                 .FrameSequencer => cpu.bus.apu.tickFrameSequencer(late),
                 .SampleAudio => cpu.bus.apu.sampleAudio(late),