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Diffstat (limited to 'src/devices/bus/bbc/1mhzbus/sprite.cpp')
-rw-r--r--src/devices/bus/bbc/1mhzbus/sprite.cpp99
1 files changed, 99 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/1mhzbus/sprite.cpp b/src/devices/bus/bbc/1mhzbus/sprite.cpp
new file mode 100644
index 00000000000..ee7f5f292e7
--- /dev/null
+++ b/src/devices/bus/bbc/1mhzbus/sprite.cpp
@@ -0,0 +1,99 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Logotron Sprite Board
+
+**********************************************************************/
+
+
+#include "emu.h"
+#include "sprite.h"
+#include "screen.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_SPRITE, bbc_sprite_device, "bbc_sprite", "Logotron Sprite Board");
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void bbc_sprite_device::device_add_mconfig(machine_config &config)
+{
+ TMS9129(config, m_vdp, 10.738635_MHz_XTAL);
+ m_vdp->int_callback().set(DEVICE_SELF_OWNER, FUNC(bbc_1mhzbus_slot_device::irq_w));
+ m_vdp->set_screen("screen");
+ m_vdp->set_vram_size(0x4000);
+
+ SCREEN(config, "screen", SCREEN_TYPE_RASTER);
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbc_sprite_device - constructor
+//-------------------------------------------------
+
+bbc_sprite_device::bbc_sprite_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, BBC_SPRITE, tag, owner, clock)
+ , device_bbc_1mhzbus_interface(mconfig, *this)
+ , m_vdp(*this, "vdp")
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_sprite_device::device_start()
+{
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void bbc_sprite_device::device_reset()
+{
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+uint8_t bbc_sprite_device::fred_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ switch (offset)
+ {
+ case 0xa0:
+ data = m_vdp->vram_read();
+ break;
+ case 0xa2:
+ data = m_vdp->register_read();
+ break;
+ }
+ return data;
+}
+
+void bbc_sprite_device::fred_w(offs_t offset, uint8_t data)
+{
+ switch (offset)
+ {
+ case 0xa1:
+ m_vdp->vram_write(data);
+ break;
+ case 0xa3:
+ m_vdp->register_write(data);
+ break;
+ }
+}