Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-23 00:39:36 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

ks0164: Actually lower TX full semaphore when host reads MPU-401 buffer. This fixes elfin losing sound and the ability to coin up during attract.

Browse Source
This commit is contained in:
AJR 2023-11-12 09:38:42 -05:00
parent 632f0a0e09
commit 3086a432ce
1 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/devices/sound/ks0164.cpp
View File

@ -221,7 +221,11 @@ void ks0164_device::mpu401_ctrl_w(u8 data)
u8 ks0164_device::mpu401_data_r()
{
// logerror("mpu pop %02x\n", m_mpu_out);
if (!machine().side_effects_disabled())
{
m_mpu_status &= ~MPUS_TX_FULL;
// logerror("mpu pop %02x\n", m_mpu_out);
}
return m_mpu_out;
}
@ -251,9 +255,12 @@ void ks0164_device::mpu401_istatus_w(u8 data)
u8 ks0164_device::mpu401_r()
{
m_mpu_status &= ~MPUS_RX_FULL;
m_cpu->set_input_line(11, CLEAR_LINE);
// logerror("mpu_r %02x (%04x)\n", m_mpu_in, m_cpu->pc());
if (!machine().side_effects_disabled())
{
m_mpu_status &= ~MPUS_RX_FULL;
m_cpu->set_input_line(11, CLEAR_LINE);
// logerror("mpu_r %02x (%04x)\n", m_mpu_in, m_cpu->pc());
}
return m_mpu_in;
}