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Diffstat (limited to 'src/emu/bus/cpc/playcity.h')
-rw-r--r-- | src/emu/bus/cpc/playcity.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/emu/bus/cpc/playcity.h b/src/emu/bus/cpc/playcity.h new file mode 100644 index 00000000000..0f904da3bc3 --- /dev/null +++ b/src/emu/bus/cpc/playcity.h @@ -0,0 +1,67 @@ +/* + PlayCity expansion device + + I/O ports: + * F880 - Z80CTC channel 0 (input is system clock (4MHz), output to YMZ294 clock) + * F881 - Z80CTC channel 1 (input from CRTC CURSOR, output to /NMI) + * F882 - Z80CTC channel 2 (input is system clock (4MHz), output to channel 3 input) + * F883 - Z80CTC channel 3 (input is channel 2 output) + * F884 - YMZ294 #1 (right) data + * F888 - YMZ294 #2 (left) data + * F984 - YMZ294 #1 (right) register select + * F988 - YMZ294 #2 (left) register select +*/ + +#ifndef CPC_PLAYCITY_H_ +#define CPC_PLAYCITY_H_ + + +#include "emu.h" +#include "cpcexp.h" +#include "sound/ay8910.h" +#include "machine/z80ctc.h" + +class cpc_playcity_device : public device_t, + public device_cpc_expansion_card_interface +{ +public: + // construction/destruction + cpc_playcity_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // optional information overrides + virtual machine_config_constructor device_mconfig_additions() const; + + DECLARE_READ8_MEMBER(ctc_r); + DECLARE_WRITE8_MEMBER(ctc_w); + DECLARE_WRITE8_MEMBER(ymz1_address_w); + DECLARE_WRITE8_MEMBER(ymz2_address_w); + DECLARE_WRITE8_MEMBER(ymz1_data_w); + DECLARE_WRITE8_MEMBER(ymz2_data_w); + DECLARE_READ8_MEMBER(ymz1_data_r); + DECLARE_READ8_MEMBER(ymz2_data_r); + DECLARE_WRITE_LINE_MEMBER(ctc_zc1_cb) { if(state) { m_slot->nmi_w(1); m_slot->nmi_w(0); } } + DECLARE_WRITE_LINE_MEMBER(ctc_intr_cb) { m_slot->irq_w(state); } + + virtual WRITE_LINE_MEMBER(cursor_w) { m_ctc->trg1(state); } + +protected: + // device-level overrides + virtual void device_start(); + virtual void device_reset(); + +private: + cpc_expansion_slot_device *m_slot; + + required_device<z80ctc_device> m_ctc; + required_device<ymz294_device> m_ymz1; + required_device<ymz294_device> m_ymz2; + + void update_ymz_clock(); +}; + +// device type definition +extern const device_type CPC_PLAYCITY; + + +#endif /* CPC_PLAYCITY_H_ */ + |