diff options
-rw-r--r-- | src/devices/bus/a2bus/a2mockingboard.cpp | 27 |
1 files changed, 8 insertions, 19 deletions
diff --git a/src/devices/bus/a2bus/a2mockingboard.cpp b/src/devices/bus/a2bus/a2mockingboard.cpp index 4323bbe1aba..0968d55c9a0 100644 --- a/src/devices/bus/a2bus/a2mockingboard.cpp +++ b/src/devices/bus/a2bus/a2mockingboard.cpp @@ -137,9 +137,6 @@ protected: virtual void write_cnxx(u8 offset, u8 data) override; required_device<tms5220_device> m_tms; - -private: - u8 m_last_cnxx_addr; }; //------------------------------------------------- @@ -294,7 +291,6 @@ u8 a2bus_ayboard_device::read_cnxx(u8 offset) u8 a2bus_echoplus_device::read_cnxx(u8 offset) { - m_last_cnxx_addr = offset; return m_via1->read(offset & 0xf); } @@ -348,7 +344,6 @@ void a2bus_ayboard_device::write_cnxx(u8 offset, u8 data) void a2bus_echoplus_device::write_cnxx(u8 offset, u8 data) { - m_last_cnxx_addr = offset; m_via1->write(offset & 0xf, data); } @@ -437,13 +432,14 @@ void a2bus_ayboard_device::via1_out_b(u8 data) void a2bus_echoplus_device::via1_out_b(u8 data) { - if (!(m_last_cnxx_addr & 0x80)) + if (!BIT(data, 2)) { - if (!BIT(data, 2)) - { - m_ay1->reset_w(); - } - else + m_ay1->reset_w(); + m_ay2->reset_w(); + } + else + { + if (BIT(data, 3)) // BC2_1=1 (PSG1 active) { switch (data & 3) { @@ -463,14 +459,7 @@ void a2bus_echoplus_device::via1_out_b(u8 data) break; } } - } - else - { - if (!BIT(data, 2)) - { - m_ay2->reset_w(); - } - else + if (BIT(data, 4)) // BC2_2_=1 (PSG2 active) { switch (data & 3) { |