diff options
| -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) |