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Diffstat (limited to 'src/devices/sound/c140.cpp')
-rw-r--r--src/devices/sound/c140.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/devices/sound/c140.cpp b/src/devices/sound/c140.cpp
index c6e5a05271e..683f2a7ebda 100644
--- a/src/devices/sound/c140.cpp
+++ b/src/devices/sound/c140.cpp
@@ -478,7 +478,7 @@ inline u8 c140_device::keyon_status_read(u16 offset)
u8 c140_device::c140_r(offs_t offset)
{
offset &= 0x1ff;
- if ((offset & 0xf) == 0x5)
+ if ((offset & 0xf) == 0x5 && offset < 0x180)
return keyon_status_read(offset);
return m_REG[offset];
}
@@ -552,6 +552,8 @@ void c140_device::c140_w(offs_t offset, u8 data)
u8 c219_device::c219_r(offs_t offset)
{
+ offset &= 0x1ff;
+
// assume same as c140
// TODO: what happens here on reading unmapped voice regs?
return c140_r(offset);