From 8ce9832c168e5c5b675599247fe9a605c473d6d9 Mon Sep 17 00:00:00 2001
From: SarahW <pcem@pcem-emulator.co.uk>
Date: Thu, 5 Apr 2018 20:54:50 +0100
Subject: [PATCH] Tweaked SB DSP write data ready timing. Fixes SB16 detection
 on Windows 98.

---
 src/sound_sb_dsp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/sound_sb_dsp.c b/src/sound_sb_dsp.c
index fb4c153..0300c24 100644
--- a/src/sound_sb_dsp.c
+++ b/src/sound_sb_dsp.c
@@ -734,11 +734,11 @@ uint8_t sb_read(uint16_t a, void *priv)
 //                pclog("SB read %02X\n",sbreaddat);
                 return dsp->sbreaddat;
                 case 0xC: /*Write data ready*/
-                if (dsp->sb_8_enable || dsp->sb_type >= SB16 )
-                        dsp->busy_count = (dsp->busy_count + 1) & 15;
+                if (dsp->sb_8_enable || dsp->sb_type >= SB16)
+                        dsp->busy_count = (dsp->busy_count + 1) & 3;
                 else
                         dsp->busy_count = 0;
-                if (dsp->wb_full || (dsp->busy_count & 8))
+                if (dsp->wb_full || (dsp->busy_count & 2))
                 {
                         dsp->wb_full = dsp->wb_time;
                         return 0xff;