From fd879f6ccc1359314be17a52ed9cfe167276ef09 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sebastian=20Strohh=C3=A4cker?= Date: Fri, 29 Jun 2007 17:56:07 +0000 Subject: [PATCH] fix tandy sound zero writes (NewRisingSun) Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2905 --- src/hardware/tandy_sound.cpp | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/src/hardware/tandy_sound.cpp b/src/hardware/tandy_sound.cpp index ab48087d..23d10421 100644 --- a/src/hardware/tandy_sound.cpp +++ b/src/hardware/tandy_sound.cpp @@ -106,7 +106,7 @@ static void SN76496Write(Bitu port,Bitu data,Bitu iolen) { case 2: /* tone 1 : frequency */ case 4: /* tone 2 : frequency */ R->Period[c] = R->UpdateStep * R->Register[r]; - if (R->Period[c] == 0) R->Period[c] = R->UpdateStep; + if (R->Period[c] == 0) R->Period[c] = 0x3fe; if (r == 4) { /* update noise shift frequency */ @@ -129,8 +129,8 @@ static void SN76496Write(Bitu port,Bitu data,Bitu iolen) { R->Period[3] = (n == 3) ? 2 * R->Period[2] : (R->UpdateStep << (5+n)); /* reset noise shifter */ - R->RNG = NG_PRESET; - R->Output[3] = R->RNG & 1; +// R->RNG = NG_PRESET; +// R->Output[3] = R->RNG & 1; } break; } @@ -147,7 +147,7 @@ static void SN76496Write(Bitu port,Bitu data,Bitu iolen) { case 4: /* tone 2 : frequency */ R->Register[r] = (R->Register[r] & 0x0f) | ((data & 0x3f) << 4); R->Period[c] = R->UpdateStep * R->Register[r]; - if (R->Period[c] == 0) R->Period[c] = R->UpdateStep; + if (R->Period[c] == 0) R->Period[c] = 0x3fe; if (r == 4) { /* update noise shift frequency */