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Diffstat (limited to 'src/emu/bus/a2bus/ezcgi.c')
-rw-r--r--src/emu/bus/a2bus/ezcgi.c314
1 files changed, 314 insertions, 0 deletions
diff --git a/src/emu/bus/a2bus/ezcgi.c b/src/emu/bus/a2bus/ezcgi.c
new file mode 100644
index 00000000000..d7a9cf3d469
--- /dev/null
+++ b/src/emu/bus/a2bus/ezcgi.c
@@ -0,0 +1,314 @@
+/*********************************************************************
+
+ ezcgi.c
+
+ "E-Z Color Graphics Interface" by Steve Ciarcia
+ from BYTE Magazine, August, 1982
+ https://archive.org/details/byte-magazine-1982-08-rescan
+
+*********************************************************************/
+
+#include "emu.h"
+#include "ezcgi.h"
+
+
+/***************************************************************************
+ PARAMETERS
+***************************************************************************/
+
+#define TMS_TAG "ezcgi_tms"
+#define SCREEN_TAG "screen"
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type A2BUS_EZCGI = &device_creator<a2bus_ezcgi_device>;
+const device_type A2BUS_EZCGI_9938 = &device_creator<a2bus_ezcgi_9938_device>;
+const device_type A2BUS_EZCGI_9958 = &device_creator<a2bus_ezcgi_9958_device>;
+
+MACHINE_CONFIG_FRAGMENT( ezcgi )
+ MCFG_DEVICE_ADD( TMS_TAG, TMS9918A, XTAL_10_738635MHz / 2 )
+ MCFG_TMS9928A_VRAM_SIZE(0x4000) // 16k of VRAM
+ MCFG_TMS9928A_OUT_INT_LINE_CB(WRITELINE(a2bus_ezcgi_device, tms_irq_w))
+ MCFG_TMS9928A_SCREEN_ADD_NTSC( SCREEN_TAG )
+ MCFG_SCREEN_UPDATE_DEVICE( TMS_TAG, tms9918a_device, screen_update )
+MACHINE_CONFIG_END
+
+#define MSX2_XBORDER_PIXELS 16
+#define MSX2_YBORDER_PIXELS 28
+#define MSX2_TOTAL_XRES_PIXELS 256 * 2 + (MSX2_XBORDER_PIXELS * 2)
+#define MSX2_TOTAL_YRES_PIXELS 212 * 2 + (MSX2_YBORDER_PIXELS * 2)
+#define MSX2_VISIBLE_XBORDER_PIXELS 8 * 2
+#define MSX2_VISIBLE_YBORDER_PIXELS 14 * 2
+
+MACHINE_CONFIG_FRAGMENT( ezcgi9938 )
+ MCFG_V9938_ADD(TMS_TAG, SCREEN_TAG, 0x30000) // 192K of VRAM
+ MCFG_V99X8_INTERRUPT_CALLBACK(WRITELINE(a2bus_ezcgi_9938_device, tms_irq_w))
+
+ MCFG_SCREEN_ADD(SCREEN_TAG, RASTER)
+ MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK)
+ MCFG_SCREEN_REFRESH_RATE(60)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
+ MCFG_SCREEN_UPDATE_DEVICE(TMS_TAG, v9938_device, screen_update)
+ MCFG_SCREEN_SIZE(MSX2_TOTAL_XRES_PIXELS, 262*2)
+ MCFG_SCREEN_VISIBLE_AREA(MSX2_XBORDER_PIXELS - MSX2_VISIBLE_XBORDER_PIXELS, MSX2_TOTAL_XRES_PIXELS - MSX2_XBORDER_PIXELS + MSX2_VISIBLE_XBORDER_PIXELS - 1, MSX2_YBORDER_PIXELS - MSX2_VISIBLE_YBORDER_PIXELS, MSX2_TOTAL_YRES_PIXELS - MSX2_YBORDER_PIXELS + MSX2_VISIBLE_YBORDER_PIXELS - 1)
+ MCFG_SCREEN_PALETTE("ezcgi_tms:palette")
+MACHINE_CONFIG_END
+
+MACHINE_CONFIG_FRAGMENT( ezcgi9958 )
+ MCFG_V9958_ADD(TMS_TAG, SCREEN_TAG, 0x30000) // 192K of VRAM
+ MCFG_V99X8_INTERRUPT_CALLBACK(WRITELINE(a2bus_ezcgi_9958_device, tms_irq_w))
+
+ MCFG_SCREEN_ADD(SCREEN_TAG, RASTER)
+ MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK)
+ MCFG_SCREEN_REFRESH_RATE(60)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
+ MCFG_SCREEN_UPDATE_DEVICE(TMS_TAG, v9938_device, screen_update)
+ MCFG_SCREEN_SIZE(MSX2_TOTAL_XRES_PIXELS, 262*2)
+ MCFG_SCREEN_VISIBLE_AREA(MSX2_XBORDER_PIXELS - MSX2_VISIBLE_XBORDER_PIXELS, MSX2_TOTAL_XRES_PIXELS - MSX2_XBORDER_PIXELS + MSX2_VISIBLE_XBORDER_PIXELS - 1, MSX2_YBORDER_PIXELS - MSX2_VISIBLE_YBORDER_PIXELS, MSX2_TOTAL_YRES_PIXELS - MSX2_YBORDER_PIXELS + MSX2_VISIBLE_YBORDER_PIXELS - 1)
+ MCFG_SCREEN_PALETTE("ezcgi_tms:palette")
+MACHINE_CONFIG_END
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor a2bus_ezcgi_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( ezcgi );
+}
+
+machine_config_constructor a2bus_ezcgi_9938_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( ezcgi9938 );
+}
+
+machine_config_constructor a2bus_ezcgi_9958_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( ezcgi9958 );
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+a2bus_ezcgi_device::a2bus_ezcgi_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, A2BUS_EZCGI, "E-Z Color Graphics Interface", tag, owner, clock, "a2ezcgi", __FILE__),
+ device_a2bus_card_interface(mconfig, *this),
+ m_tms(*this, TMS_TAG)
+{
+}
+
+a2bus_ezcgi_device::a2bus_ezcgi_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
+ device_t(mconfig, type, name, tag, owner, clock, shortname, source),
+ device_a2bus_card_interface(mconfig, *this),
+ m_tms(*this, TMS_TAG)
+{
+}
+
+a2bus_ezcgi_9938_device::a2bus_ezcgi_9938_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, A2BUS_EZCGI_9938, "E-Z Color Graphics Interface (TMS9938)", tag, owner, clock, "a2ezcgi3", __FILE__),
+ device_a2bus_card_interface(mconfig, *this),
+ m_tms(*this, TMS_TAG)
+{
+}
+
+a2bus_ezcgi_9938_device::a2bus_ezcgi_9938_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
+ device_t(mconfig, type, name, tag, owner, clock, shortname, source),
+ device_a2bus_card_interface(mconfig, *this),
+ m_tms(*this, TMS_TAG)
+{
+}
+
+a2bus_ezcgi_9958_device::a2bus_ezcgi_9958_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, A2BUS_EZCGI_9958, "E-Z Color Graphics Interface (TMS9958)", tag, owner, clock, "a2ezcgi5", __FILE__),
+ device_a2bus_card_interface(mconfig, *this),
+ m_tms(*this, TMS_TAG)
+{
+}
+
+a2bus_ezcgi_9958_device::a2bus_ezcgi_9958_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
+ device_t(mconfig, type, name, tag, owner, clock, shortname, source),
+ device_a2bus_card_interface(mconfig, *this),
+ m_tms(*this, TMS_TAG)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void a2bus_ezcgi_device::device_start()
+{
+ // set_a2bus_device makes m_slot valid
+ set_a2bus_device();
+}
+
+void a2bus_ezcgi_device::device_reset()
+{
+}
+
+void a2bus_ezcgi_9938_device::device_start()
+{
+ // set_a2bus_device makes m_slot valid
+ set_a2bus_device();
+}
+
+void a2bus_ezcgi_9938_device::device_reset()
+{
+}
+
+void a2bus_ezcgi_9958_device::device_start()
+{
+ // set_a2bus_device makes m_slot valid
+ set_a2bus_device();
+}
+
+void a2bus_ezcgi_9958_device::device_reset()
+{
+}
+
+/*
+ C0nx map:
+ 0 - TMS read
+ 1 - TMS write
+*/
+
+UINT8 a2bus_ezcgi_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);
+ }
+
+ return 0xff;
+}
+
+void a2bus_ezcgi_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
+{
+ switch (offset)
+ {
+ case 0:
+ m_tms->vram_write(space, 0, data);
+ break;
+
+ case 1:
+ m_tms->register_write(space, 0, data);
+ break;
+ }
+}
+
+UINT8 a2bus_ezcgi_9938_device::read_c0nx(address_space &space, UINT8 offset)
+{
+ switch (offset)
+ {
+ case 0:
+ return m_tms->vram_r();
+
+ case 1:
+ return m_tms->status_r();
+ }
+
+ return 0xff;
+}
+
+void a2bus_ezcgi_9938_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
+{
+ switch (offset)
+ {
+ case 0:
+ m_tms->vram_w(data);
+ break;
+
+ case 1:
+ m_tms->command_w(data);
+ break;
+
+ case 2:
+ m_tms->palette_w(data);
+ break;
+
+ case 3:
+ m_tms->register_w(data);
+ break;
+ }
+}
+
+UINT8 a2bus_ezcgi_9958_device::read_c0nx(address_space &space, UINT8 offset)
+{
+ switch (offset)
+ {
+ case 0:
+ return m_tms->vram_r();
+
+ case 1:
+ return m_tms->status_r();
+ }
+
+ return 0xff;
+}
+
+void a2bus_ezcgi_9958_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
+{
+ switch (offset)
+ {
+ case 0:
+ m_tms->vram_w(data);
+ break;
+
+ case 1:
+ m_tms->command_w(data);
+ break;
+
+ case 2:
+ m_tms->palette_w(data);
+ break;
+
+ case 3:
+ m_tms->register_w(data);
+ break;
+ }
+}
+
+WRITE_LINE_MEMBER( a2bus_ezcgi_device::tms_irq_w )
+{
+ if (state)
+ {
+ raise_slot_irq();
+ }
+ else
+ {
+ lower_slot_irq();
+ }
+}
+
+WRITE_LINE_MEMBER( a2bus_ezcgi_9938_device::tms_irq_w )
+{
+ if (state)
+ {
+ raise_slot_irq();
+ }
+ else
+ {
+ lower_slot_irq();
+ }
+}
+
+WRITE_LINE_MEMBER( a2bus_ezcgi_9958_device::tms_irq_w )
+{
+ if (state)
+ {
+ raise_slot_irq();
+ }
+ else
+ {
+ lower_slot_irq();
+ }
+}
+