cd: fix cycle overflow issue

[picodrive.git] / pico / pico.c

diff --git a/pico/pico.c b/pico/pico.c
index 6888080..8535d48 100644 (file)
--- a/pico/pico.c
+++ b/pico/pico.c
@@ -285,8 +285,11 @@ int z80_scanline_cycles;  /* cycles done until z80_scanline */
 /* sync z80 to 68k */\r
 PICO_INTERNAL void PicoSyncZ80(unsigned int m68k_cycles_done)\r
 {\r
+  int m68k_cnt;\r
   int cnt;\r
-  z80_cycle_aim += cycles_68k_to_z80(m68k_cycles_done - last_z80_sync);\r
+\r
+  m68k_cnt = m68k_cycles_done - last_z80_sync;\r
+  z80_cycle_aim += cycles_68k_to_z80(m68k_cnt);\r
   cnt = z80_cycle_aim - z80_cycle_cnt;\r
   last_z80_sync = m68k_cycles_done;\r
 \r