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author mahlemiut <bsr@xnet.co.nz>2014-11-01 16:01:45 +1300
committer mahlemiut <bsr@xnet.co.nz>2014-11-01 16:03:29 +1300
commited94243929ba6b28118d713e535ea451430ca20c (patch)
tree2d5ee32c98eb74b3c10c8b44364dd677357d9bb4
parent9f236592c7095c0cebf5b1525ac4a8913433849c (diff)
(MESS) amstrad: Added preliminary support for the PlayCity.
-rw-r--r--src/emu/bus/bus.mak1
-rw-r--r--src/emu/bus/cpc/playcity.c156
-rw-r--r--src/emu/bus/cpc/playcity.h65
-rw-r--r--src/emu/machine/z80ctc.h2
-rw-r--r--src/mess/drivers/amstrad.c2
-rw-r--r--src/mess/includes/amstrad.h1
6 files changed, 227 insertions, 0 deletions
diff --git a/src/emu/bus/bus.mak b/src/emu/bus/bus.mak
index 6c448055d0d..49130a675d8 100644
--- a/src/emu/bus/bus.mak
+++ b/src/emu/bus/bus.mak
@@ -1294,6 +1294,7 @@ BUSOBJS += $(BUSOBJ)/cpc/cpc_rs232.o
BUSOBJS += $(BUSOBJ)/cpc/mface2.o
BUSOBJS += $(BUSOBJ)/cpc/symbfac2.o
BUSOBJS += $(BUSOBJ)/cpc/amdrum.o
+BUSOBJS += $(BUSOBJ)/cpc/playcity.o
endif
#-------------------------------------------------
diff --git a/src/emu/bus/cpc/playcity.c b/src/emu/bus/cpc/playcity.c
new file mode 100644
index 00000000000..c177970065d
--- /dev/null
+++ b/src/emu/bus/cpc/playcity.c
@@ -0,0 +1,156 @@
+/*
+ PlayCity expansion device
+
+ Z80 CTC
+ 2x YMZ294 (clocks provided by CTC)
+*/
+
+#include "playcity.h"
+#include "includes/amstrad.h"
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type CPC_PLAYCITY = &device_creator<cpc_playcity_device>;
+
+// device machine config
+static MACHINE_CONFIG_FRAGMENT( cpc_playcity )
+ MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL_4MHz)
+ MCFG_Z80CTC_ZC1_CB(WRITELINE(cpc_playcity_device,ctc_zc1_cb))
+ MCFG_Z80CTC_ZC2_CB(WRITELINE(cpc_playcity_device,ctc_zc2_cb))
+
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_ADD("ymz_1",YMZ294,XTAL_4MHz) // when timer is not set, operates at 4MHz (interally divided by 2, so equivalent to the ST)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)
+ MCFG_SOUND_ADD("ymz_2",YMZ294,XTAL_4MHz)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)
+
+ // pass-through
+ MCFG_DEVICE_ADD("exp", CPC_EXPANSION_SLOT, 0)
+ MCFG_DEVICE_SLOT_INTERFACE(cpc_exp_cards, NULL, false)
+ MCFG_CPC_EXPANSION_SLOT_OUT_IRQ_CB(DEVWRITELINE("^", cpc_expansion_slot_device, irq_w))
+ MCFG_CPC_EXPANSION_SLOT_OUT_NMI_CB(DEVWRITELINE("^", cpc_expansion_slot_device, nmi_w))
+ MCFG_CPC_EXPANSION_SLOT_OUT_ROMDIS_CB(DEVWRITELINE("^", cpc_expansion_slot_device, romdis_w)) // ROMDIS
+
+MACHINE_CONFIG_END
+
+
+machine_config_constructor cpc_playcity_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( cpc_playcity );
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+cpc_playcity_device::cpc_playcity_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, CPC_PLAYCITY, "PlayCity", tag, owner, clock, "cpc_playcity", __FILE__),
+ device_cpc_expansion_card_interface(mconfig, *this),
+ m_ctc(*this,"ctc"),
+ m_ymz1(*this,"ymz_1"),
+ m_ymz2(*this,"ymz_2")
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void cpc_playcity_device::device_start()
+{
+ device_t* cpu = machine().device("maincpu");
+ address_space& space = cpu->memory().space(AS_IO);
+ m_slot = dynamic_cast<cpc_expansion_slot_device *>(owner());
+
+ space.install_readwrite_handler(0xf880,0xf883,0,0,read8_delegate(FUNC(cpc_playcity_device::ctc_r),this),write8_delegate(FUNC(cpc_playcity_device::ctc_w),this));
+ space.install_readwrite_handler(0xf884,0xf884,0,0,read8_delegate(FUNC(cpc_playcity_device::ymz1_data_r),this),write8_delegate(FUNC(cpc_playcity_device::ymz1_data_w),this));
+ space.install_readwrite_handler(0xf888,0xf888,0,0,read8_delegate(FUNC(cpc_playcity_device::ymz2_data_r),this),write8_delegate(FUNC(cpc_playcity_device::ymz2_data_w),this));
+ space.install_write_handler(0xf984,0xf984,0,0,write8_delegate(FUNC(cpc_playcity_device::ymz1_address_w),this));
+ space.install_write_handler(0xf988,0xf988,0,0,write8_delegate(FUNC(cpc_playcity_device::ymz2_address_w),this));
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void cpc_playcity_device::device_reset()
+{
+}
+
+
+READ8_MEMBER(cpc_playcity_device::ctc_r)
+{
+ return m_ctc->read(space,offset);
+}
+
+WRITE8_MEMBER(cpc_playcity_device::ctc_w)
+{
+ m_ctc->write(space,offset,data);
+ update_ymz_clock();
+}
+
+WRITE8_MEMBER(cpc_playcity_device::ymz1_address_w)
+{
+ m_ymz1->address_w(space,offset,data);
+}
+
+WRITE8_MEMBER(cpc_playcity_device::ymz2_address_w)
+{
+ m_ymz2->address_w(space,offset,data);
+}
+
+WRITE8_MEMBER(cpc_playcity_device::ymz1_data_w)
+{
+ m_ymz1->data_w(space,offset,data);
+}
+
+WRITE8_MEMBER(cpc_playcity_device::ymz2_data_w)
+{
+ m_ymz2->data_w(space,offset,data);
+}
+
+READ8_MEMBER(cpc_playcity_device::ymz1_data_r)
+{
+ return m_ymz1->data_r(space,offset);
+}
+
+READ8_MEMBER(cpc_playcity_device::ymz2_data_r)
+{
+ return m_ymz2->data_r(space,offset);
+}
+
+void cpc_playcity_device::update_ymz_clock()
+{
+ // Bit of a hack job here, since there is no way currently to connect the CTC channel output directly to the YMZ clocks.
+ UINT8 rate = m_ctc->get_channel_constant(0);
+ UINT64 clk = XTAL_4MHz;
+
+ switch(rate)
+ {
+ case 0x00: clk = 3980000; break;
+ case 0x01: clk = 2000000; break;
+ case 0x02: clk = 3000000; break;
+ case 0x03: clk = 3330000; break;
+ case 0x04: clk = 3500000; break;
+ case 0x05: clk = 3600000; break;
+ case 0x06: clk = 3670000; break;
+ case 0x07: clk = 3710000; break;
+ case 0x08: clk = 3750000; break;
+ case 0x09: clk = 3780000; break;
+ case 0x0a: clk = 3800000; break;
+ case 0x0b: clk = 3820000; break;
+ case 0x0c: clk = 3830000; break;
+ case 0x0d: clk = 3850000; break;
+ case 0x0e: clk = 3860000; break;
+ case 0x0f: clk = 3870000; break;
+ }
+
+ clk = clk / 2; // YMZ294 has an internal /2 divider (not handled in AY core?)
+ m_ymz1->ay_set_clock(clk);
+ m_ymz2->ay_set_clock(clk);
+ popmessage("YMZ clocks set to %lliHz",clk);
+}
+
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_ */
+
diff --git a/src/emu/machine/z80ctc.h b/src/emu/machine/z80ctc.h
index 4e395517092..a9945d547bf 100644
--- a/src/emu/machine/z80ctc.h
+++ b/src/emu/machine/z80ctc.h
@@ -74,6 +74,8 @@ public:
DECLARE_WRITE_LINE_MEMBER( trg2 );
DECLARE_WRITE_LINE_MEMBER( trg3 );
+ UINT16 get_channel_constant(UINT8 channel) { return m_channel[channel].m_tconst; }
+
protected:
// device-level overrides
virtual void device_start();
diff --git a/src/mess/drivers/amstrad.c b/src/mess/drivers/amstrad.c
index 9d2e84d7f04..f81ffbcec82 100644
--- a/src/mess/drivers/amstrad.c
+++ b/src/mess/drivers/amstrad.c
@@ -804,6 +804,7 @@ SLOT_INTERFACE_START(cpc_exp_cards)
SLOT_INTERFACE("amsrs232", CPC_RS232_AMS)
SLOT_INTERFACE("sf2", CPC_SYMBIFACE2)
SLOT_INTERFACE("amdrum", CPC_AMDRUM)
+ SLOT_INTERFACE("playcity", CPC_PLAYCITY)
SLOT_INTERFACE_END
SLOT_INTERFACE_START(cpcplus_exp_cards)
@@ -815,6 +816,7 @@ SLOT_INTERFACE_START(cpcplus_exp_cards)
SLOT_INTERFACE("amsrs232", CPC_RS232_AMS)
SLOT_INTERFACE("sf2", CPC_SYMBIFACE2)
SLOT_INTERFACE("amdrum", CPC_AMDRUM)
+ SLOT_INTERFACE("playcity", CPC_PLAYCITY)
SLOT_INTERFACE_END
SLOT_INTERFACE_START(amstrad_centronics_devices)
diff --git a/src/mess/includes/amstrad.h b/src/mess/includes/amstrad.h
index 1b0a281917e..69bad9589d2 100644
--- a/src/mess/includes/amstrad.h
+++ b/src/mess/includes/amstrad.h
@@ -22,6 +22,7 @@
#include "bus/cpc/cpc_rs232.h"
#include "bus/cpc/symbfac2.h"
#include "bus/cpc/amdrum.h"
+#include "bus/cpc/playcity.h"
#include "machine/ram.h"
#include "imagedev/cassette.h"
#include "bus/centronics/ctronics.h"