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author R. Belmont <rb6502@users.noreply.github.com>2012-09-23 16:22:00 +0000
committer R. Belmont <rb6502@users.noreply.github.com>2012-09-23 16:22:00 +0000
commit4a412e9cfa1b86fa6f096900614d307c5f6c1838 (patch)
tree7ef8c986906af3b3d474628d20441652eb7cb45b /src/mess/machine/a2arcadebd.c
parentec82f9f1ebf597d98746f7f79bfa3775f5bd375b (diff)
(MESS) Apple II: Add preliminary support for TME Arcade Board [R. Belmont]
Diffstat (limited to 'src/mess/machine/a2arcadebd.c')
-rw-r--r--src/mess/machine/a2arcadebd.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/src/mess/machine/a2arcadebd.c b/src/mess/machine/a2arcadebd.c
new file mode 100644
index 00000000000..6638261bfec
--- /dev/null
+++ b/src/mess/machine/a2arcadebd.c
@@ -0,0 +1,145 @@
+/*********************************************************************
+
+ a2arcadeboard.c
+
+ Implementation of the Third Millenium Engineering Arcade Board
+
+*********************************************************************/
+
+#include "emu.h"
+#include "machine/a2arcadebd.h"
+
+
+/***************************************************************************
+ PARAMETERS
+***************************************************************************/
+
+#define TMS_TAG "arcbd_tms"
+#define AY_TAG "arcbd_ay"
+#define SCREEN_TAG "screen"
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type A2BUS_ARCADEBOARD = &device_creator<a2bus_arcboard_device>;
+
+static const ay8910_interface arcadeboard_ay8910_interface =
+{
+ AY8910_LEGACY_OUTPUT,
+ AY8910_DEFAULT_LOADS,
+ DEVCB_NULL
+};
+
+static TMS9928A_INTERFACE(arcadeboard_tms9918a_interface)
+{
+ SCREEN_TAG,
+ 0x4000, // 16k of VRAM
+ DEVCB_NULL // VBL interrupt
+};
+
+MACHINE_CONFIG_FRAGMENT( arcadeboard )
+ MCFG_TMS9928A_ADD( TMS_TAG, TMS9918A, arcadeboard_tms9918a_interface )
+ MCFG_TMS9928A_SCREEN_ADD_NTSC( SCREEN_TAG )
+ MCFG_SCREEN_UPDATE_DEVICE( TMS_TAG, tms9918a_device, screen_update )
+
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_ADD(AY_TAG, AY8910, 1022727)
+ MCFG_SOUND_CONFIG(arcadeboard_ay8910_interface)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
+MACHINE_CONFIG_END
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor a2bus_arcboard_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( arcadeboard );
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+a2bus_arcboard_device::a2bus_arcboard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, A2BUS_ARCADEBOARD, "Third Millenium Engineering Arcade Board", tag, owner, clock),
+ device_a2bus_card_interface(mconfig, *this),
+ m_tms(*this, TMS_TAG),
+ m_ay(*this, AY_TAG)
+{
+ m_shortname = "a2arcbd";
+}
+
+a2bus_arcboard_device::a2bus_arcboard_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, type, name, tag, owner, clock),
+ device_a2bus_card_interface(mconfig, *this),
+ m_tms(*this, TMS_TAG),
+ m_ay(*this, AY_TAG)
+{
+ m_shortname = "a2arcbd";
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void a2bus_arcboard_device::device_start()
+{
+ // set_a2bus_device makes m_slot valid
+ set_a2bus_device();
+}
+
+void a2bus_arcboard_device::device_reset()
+{
+}
+
+/*
+ C0nx map:
+ 0 - TMS read vram
+ 1 - TMS read status
+ 2 - TMS write vram
+ 3 - TMS write register
+ 5 - AY register select
+ 6 - AY data
+*/
+
+ UINT8 a2bus_arcboard_device::read_c0nx(address_space &space, UINT8 offset)
+{
+ switch (offset)
+ {
+ case 0:
+ return m_tms->vram_read(space, 0);
+
+ case 1:
+ return m_tms->register_read(space, 0);
+
+ case 6:
+ return ay8910_r(m_ay, space, 0);
+ }
+
+ return 0xff;
+}
+
+void a2bus_arcboard_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
+{
+ switch (offset)
+ {
+ case 2:
+ m_tms->vram_write(space, 0, data);
+ break;
+
+ case 3:
+ m_tms->register_write(space, 0, data);
+ break;
+
+ case 5:
+ ay8910_address_w(m_ay, space, 0, data);
+ break;
+
+ case 6:
+ ay8910_data_w(m_ay, space, 0, data);
+ break;
+ }
+}