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author hap <happppp@users.noreply.github.com>2019-04-05 14:22:08 +0200
committer hap <happppp@users.noreply.github.com>2019-04-05 14:22:21 +0200
commit7769fed424c7bd4994210ef83fd6e4c39bc54ca8 (patch)
tree45aa3dee20ce4a382624c8a31fb64707a6e4a728 /src/devices/sound/ay8910.cpp
parentf4000a69711ed1853af74598cdbed78da17e2a41 (diff)
ay8910: reset i/o reg on port direction change (nw)
Diffstat (limited to 'src/devices/sound/ay8910.cpp')
-rw-r--r--src/devices/sound/ay8910.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/devices/sound/ay8910.cpp b/src/devices/sound/ay8910.cpp
index 9ee02834f67..efe54b2c048 100644
--- a/src/devices/sound/ay8910.cpp
+++ b/src/devices/sound/ay8910.cpp
@@ -966,6 +966,9 @@ void ay8910_device::ay8910_write_reg(int r, int v)
if ((m_last_enable == -1) ||
((m_last_enable & 0x40) != (m_regs[AY_ENABLE] & 0x40)))
{
+ if (!m_port_a_read_cb.isnull())
+ m_regs[AY_PORTA] = m_port_a_read_cb(0);
+
/* write out 0xff if port set to input */
if (!m_port_a_write_cb.isnull())
m_port_a_write_cb((offs_t)0, (m_regs[AY_ENABLE] & 0x40) ? m_regs[AY_PORTA] : 0xff);
@@ -974,6 +977,9 @@ void ay8910_device::ay8910_write_reg(int r, int v)
if ((m_last_enable == -1) ||
((m_last_enable & 0x80) != (m_regs[AY_ENABLE] & 0x80)))
{
+ if (!m_port_b_read_cb.isnull())
+ m_regs[AY_PORTB] = m_port_b_read_cb(0);
+
/* write out 0xff if port set to input */
if (!m_port_b_write_cb.isnull())
m_port_b_write_cb((offs_t)0, (m_regs[AY_ENABLE] & 0x80) ? m_regs[AY_PORTB] : 0xff);