summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/mz6500.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mess/drivers/mz6500.c')
-rw-r--r--src/mess/drivers/mz6500.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/mess/drivers/mz6500.c b/src/mess/drivers/mz6500.c
index 0d497e7f25d..3657f59b2d7 100644
--- a/src/mess/drivers/mz6500.c
+++ b/src/mess/drivers/mz6500.c
@@ -62,12 +62,15 @@ void mz6500_state::video_start()
READ8_MEMBER( mz6500_state::mz6500_vram_r )
{
- return m_video_ram[offset];
+ return m_video_ram[offset >> 1] >> ((offset & 1) ? 8 : 0);
}
WRITE8_MEMBER( mz6500_state::mz6500_vram_w )
{
- m_video_ram[offset] = data;
+ int mask = (offset & 1) ? 8 : 0;
+ offset >>= 1;
+ m_video_ram[offset] &= 0xff00 >> mask;
+ m_video_ram[offset] |= data << mask;
}
static ADDRESS_MAP_START(mz6500_map, AS_PROGRAM, 16, mz6500_state)