Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-10-06 17:08:28 +03:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity

Drop the upper bit of the address when shifting left, as described http://wiki.osdev.org/ISA_DMA#16_bit_issues. This fixes 16 bit audio in sb16 diagnose.exe [smf-]

Browse Source
This commit is contained in:
smf- 2016-10-06 09:20:42 +01:00
parent f9acb0c97b
commit ffdb2befff
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/devices/machine/cs4031.cpp
View File

@ -362,7 +362,7 @@ READ8_MEMBER( cs4031_device::dma_read_word )
if (m_dma_channel == -1) if (m_dma_channel == -1)
return 0xff; 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; m_dma_high_byte = result >> 8;
return result; return result;
@ -373,7 +373,7 @@ WRITE8_MEMBER( cs4031_device::dma_write_word )
if (m_dma_channel == -1) if (m_dma_channel == -1)
return; 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 ) WRITE_LINE_MEMBER( cs4031_device::dma2_dack0_w )