summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/bus/cpc/playcity.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/emu/bus/cpc/playcity.h')
-rw-r--r--src/emu/bus/cpc/playcity.h65
1 files changed, 65 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..5f1f46d08fb
--- /dev/null
+++ b/src/emu/bus/cpc/playcity.h
@@ -0,0 +1,65 @@
+/*
+ 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, output to IRQ)
+ * 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_zc2_cb) { m_slot->irq_w(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_ */
+