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| author | Simon Howard | 2009-05-28 18:37:31 +0000 |
|---|---|---|
| committer | Simon Howard | 2009-05-28 18:37:31 +0000 |
| commit | 6e4f6ab9626d81e4106d3ccc974a76d832fdff13 (patch) | |
| tree | 297aed4697be1fbfb36679495f21ded18010ccb7 /opl/examples | |
| parent | b695843cc549e3de4845e340c611efb0ae98866c (diff) | |
| download | chocolate-doom-6e4f6ab9626d81e4106d3ccc974a76d832fdff13.tar.gz chocolate-doom-6e4f6ab9626d81e4106d3ccc974a76d832fdff13.tar.bz2 chocolate-doom-6e4f6ab9626d81e4106d3ccc974a76d832fdff13.zip | |
Set channel bits for OPL3 so that OPL2 traces will play back properly.
Subversion-branch: /branches/opl-branch
Subversion-revision: 1537
Diffstat (limited to 'opl/examples')
| -rw-r--r-- | opl/examples/droplay.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/opl/examples/droplay.c b/opl/examples/droplay.c index af1a59d9..5f09fe11 100644 --- a/opl/examples/droplay.c +++ b/opl/examples/droplay.c @@ -39,6 +39,15 @@ void WriteReg(unsigned int reg, unsigned int val) { int i; + // This was recorded from an OPL2, but we are probably playing + // back on an OPL3, so we need to enable the original OPL2 + // channels. Doom does this already, but other games don't. + + if ((reg & 0xf0) == OPL_REGS_FEEDBACK) + { + val |= 0x30; + } + OPL_WritePort(OPL_REGISTER_PORT, reg); for (i=0; i<6; ++i) |