passthru

Author: holub

src/devices/bus/spectrum/musicmachine.cpp

@@ -31,8 +31,11 @@ void spectrum_musicmachine_device::device_add_mconfig(machine_config &config)
 	SPEAKER(config, "speaker").front_center();
 	ZN429E(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.2);
 
+	// passthru
 	SPECTRUM_EXPANSION_SLOT(config, m_exp, spectrum_expansion_devices, nullptr);
 	m_exp->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::irq_w));
+	m_exp->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w));
+	m_exp->fb_r_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::fb_r));
 }
 
 //**************************************************************************

src/devices/bus/spectrum/musicmachine.h

@@ -36,6 +36,15 @@ class spectrum_musicmachine_device  : public device_t,
 	virtual u8 iorq_r(offs_t offset) override;
 	virtual void iorq_w(offs_t offset, u8 data) override;
 
+	// passthru
+	virtual void pre_opcode_fetch(offs_t offset) override { m_exp->pre_opcode_fetch(offset); }
+	virtual void post_opcode_fetch(offs_t offset) override { m_exp->post_opcode_fetch(offset); }
+	virtual void pre_data_fetch(offs_t offset) override { m_exp->pre_data_fetch(offset); }
+	virtual void post_data_fetch(offs_t offset) override { m_exp->post_data_fetch(offset); }
+	virtual u8 mreq_r(offs_t offset) override { return m_exp->romcs() ? m_exp->mreq_r(offset) : 0xff; }
+	virtual void mreq_w(offs_t offset, u8 data) override { if (m_exp->romcs()) m_exp->mreq_w(offset, data); }
+	virtual bool romcs() override { return m_exp->romcs(); }
+
 private:
 	required_device<acia6850_device> m_acia;
 	required_device<dac_byte_interface> m_dac;