From: kub <derkub@gmail.com>
Date: Thu, 23 May 2024 22:06:39 +0000 (+0200)
Subject: core z80, partially revert ebde43d (bus blocking DMA)
X-Git-Tag: v2.00~45
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3b480be4c0ef9dd82df9d9634987ee02e8eed028;p=picodrive.git

core z80, partially revert ebde43d (bus blocking DMA)

it causes audio lag in OD2
---

diff --git a/pico/memory.c b/pico/memory.c
index fa3cf0f9..de5e3e5e 100644
--- a/pico/memory.c
+++ b/pico/memory.c
@@ -1372,7 +1372,8 @@ static void access_68k_bus(int delay) // bus delay as Q8
   // TODO: if the 68K is in DMA wait, Z80 has to wait until DMA ends
   if (Pico.video.status & (PVS_CPUWR|PVS_CPURD)) {
     z80_subCLeft(z80_cyclesLeft); // rather rough on both condition and action
-    Pico.video.status |= PVS_Z80WAIT;
+    // TODO the next line will cause audio lag in Overdrive 2 demo?
+    //Pico.video.status |= PVS_Z80WAIT;
   }
 
   // 68k bus access delay for z80. The fractional part needs to be accumulated