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

irixxxx · Jul 2, 2024 · 2f0c563 · 2f0c563
1 parent 25559e5
commit 2f0c563
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Showing 2 changed files with 6 additions and 3 deletions.
diff --git 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
@@ -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)