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Diffstat (limited to 'src/devices/machine/cs4031.cpp')
-rw-r--r--src/devices/machine/cs4031.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/devices/machine/cs4031.cpp b/src/devices/machine/cs4031.cpp
index 4331747e506..f9d9108597a 100644
--- a/src/devices/machine/cs4031.cpp
+++ b/src/devices/machine/cs4031.cpp
@@ -362,7 +362,7 @@ READ8_MEMBER( cs4031_device::dma_read_word )
if (m_dma_channel == -1)
return 0xff;
- UINT16 result = m_space->read_word(page_offset() + (offset << 1));
+ UINT16 result = m_space->read_word(page_offset() + ((offset << 1) & 0xffff));
m_dma_high_byte = result >> 8;
return result;
@@ -373,7 +373,7 @@ WRITE8_MEMBER( cs4031_device::dma_write_word )
if (m_dma_channel == -1)
return;
- m_space->write_word(page_offset() + (offset << 1), (m_dma_high_byte << 8) | data);
+ m_space->write_word(page_offset() + ((offset << 1) & 0xffff), (m_dma_high_byte << 8) | data);
}
WRITE_LINE_MEMBER( cs4031_device::dma2_dack0_w )