From: kub <derkub@gmail.com>
Date: Tue, 2 Jul 2024 20:43:26 +0000 (+0200)
Subject: core z80, fix cycle counting if z80 in hold on frame change
X-Git-Tag: v2.00~16
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2f0c5639c13693092e36a00df5857b5b44302cef;p=picodrive.git

core z80, fix cycle counting if z80 in hold on frame change
---

diff --git a/pico/memory.c b/pico/memory.c
index 34d0cf7b..69ca8aa3 100644
--- a/pico/memory.c
+++ b/pico/memory.c
@@ -530,7 +530,8 @@ void NOINLINE ctl_write_z80busreq(u32 d)
   {
     if (d)
     {
-      Pico.t.z80c_aim = Pico.t.z80c_cnt = z80_cycles_from_68k() + (Pico.t.z80_busdelay >> 8) + 2;
+      Pico.t.z80c_aim = Pico.t.z80c_cnt = z80_cycles_from_68k() + 2;
+      Pico.t.z80c_cnt += Pico.t.z80_busdelay >> 8;
       Pico.t.z80_busdelay &= 0xff;
     }
     else
diff --git a/pico/pico_int.h b/pico/pico_int.h
index c57c5f6a..3d495739 100644
--- a/pico/pico_int.h
+++ b/pico/pico_int.h
@@ -201,8 +201,10 @@ extern struct DrZ80 drZ80;
 
 #define Z80_STATE_SIZE 0x60
 
-#define z80_resetCycles() \
-  Pico.t.z80c_cnt -= Pico.t.z80c_aim, Pico.t.z80c_aim = Pico.t.z80_scanline = 0
+#define z80_resetCycles() { \
+  Pico.t.z80c_cnt -= Pico.t.z80c_aim, Pico.t.z80c_aim = Pico.t.z80_scanline = 0; \
+  if (!Pico.m.z80Run | Pico.m.z80_reset) Pico.t.z80c_cnt = 0; \
+}
 
 #define z80_cyclesDone() \
   (Pico.t.z80c_aim - z80_cyclesLeft)