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-rw-r--r--src/devices/bus/vip/vp590.cpp261
1 files changed, 261 insertions, 0 deletions
diff --git a/src/devices/bus/vip/vp590.cpp b/src/devices/bus/vip/vp590.cpp
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+++ b/src/devices/bus/vip/vp590.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ RCA VIP Color Board VP590 emulation
+
+**********************************************************************/
+
+#include "vp590.h"
+
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define CDP1862_TAG "u2"
+#define SCREEN_TAG ":screen" // hijack the VIP's screen since the CDP1861 chip would be removed from the PCB on real hardware
+
+#define COLOR_RAM_SIZE 0x100
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type VP590 = &device_creator<vp590_device>;
+
+
+//-------------------------------------------------
+// CDP1862_INTERFACE( cgc_intf )
+//-------------------------------------------------
+
+READ_LINE_MEMBER( vp590_device::rd_r )
+{
+ return BIT(m_color, 1);
+}
+
+READ_LINE_MEMBER( vp590_device::bd_r )
+{
+ return BIT(m_color, 2);
+}
+
+READ_LINE_MEMBER( vp590_device::gd_r )
+{
+ return BIT(m_color, 3);
+}
+
+
+//-------------------------------------------------
+// MACHINE_CONFIG_FRAGMENT( vp590 )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( vp590 )
+ MCFG_DEVICE_ADD(CDP1862_TAG, CDP1862, CPD1862_CLOCK)
+ MCFG_CDP1861_RD_CALLBACK(DEVREADLINE(DEVICE_SELF, vp590_device, rd_r))
+ MCFG_CDP1861_BD_CALLBACK(DEVREADLINE(DEVICE_SELF, vp590_device, bd_r))
+ MCFG_CDP1861_GD_CALLBACK(DEVREADLINE(DEVICE_SELF, vp590_device, gd_r))
+ MCFG_CDP1862_LUMINANCE(RES_R(510), RES_R(360), RES_K(1), RES_K(1.5)) // R3, R4, R5, R6
+ MCFG_CDP1862_CHROMINANCE(RES_K(3.9), RES_K(10), RES_K(2), RES_K(3.3)) // R7, R8, R9, R10
+ MCFG_VIDEO_SET_SCREEN(SCREEN_TAG)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor vp590_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( vp590 );
+}
+
+
+//-------------------------------------------------
+// INPUT_PORTS( vp590 )
+//-------------------------------------------------
+
+static INPUT_PORTS_START( vp590 )
+ PORT_START("J1")
+ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 0")
+ PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 1")
+ PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 2")
+ PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 3")
+ PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 4")
+ PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 5")
+ PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 6")
+ PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 7")
+ PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 8")
+ PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad 9")
+ PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad A")
+ PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad B")
+ PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad C")
+ PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad D")
+ PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad E")
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 1 Keypad F")
+
+ PORT_START("J2")
+ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 0")
+ PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 1")
+ PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 2")
+ PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 3")
+ PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 4")
+ PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 5")
+ PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 6")
+ PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 7")
+ PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 8")
+ PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad 9")
+ PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad A")
+ PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad B")
+ PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad C")
+ PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad D")
+ PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad E")
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Player 2 Keypad F")
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor vp590_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( vp590 );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// vp590_device - constructor
+//-------------------------------------------------
+
+vp590_device::vp590_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, VP590, "VP590", tag, owner, clock, "vp590", __FILE__),
+ device_vip_expansion_card_interface(mconfig, *this),
+ m_cgc(*this, CDP1862_TAG),
+ m_color_ram(*this, "color_ram"),
+ m_j1(*this, "J1"),
+ m_j2(*this, "J2")
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void vp590_device::device_start()
+{
+ // allocate memory
+ m_color_ram.allocate(COLOR_RAM_SIZE);
+
+ // state saving
+ save_item(NAME(m_a12));
+ save_item(NAME(m_color));
+ save_item(NAME(m_keylatch));
+}
+
+
+//-------------------------------------------------
+// vip_program_w - program write
+//-------------------------------------------------
+
+void vp590_device::vip_program_w(address_space &space, offs_t offset, UINT8 data, int cdef, int *minh)
+{
+ if (offset >= 0xc000 && offset < 0xe000)
+ {
+ UINT8 mask = 0xff;
+
+ m_a12 = (offset & 0x1000) ? 1 : 0;
+
+ if (!m_a12)
+ {
+ // mask out A4 and A3
+ mask = 0xe7;
+ }
+
+ // write to CDP1822
+ m_color_ram[offset & mask] = data << 1;
+
+ m_cgc->con_w(0);
+ }
+}
+
+
+//-------------------------------------------------
+// vip_io_w - I/O write
+//-------------------------------------------------
+
+void vp590_device::vip_io_w(address_space &space, offs_t offset, UINT8 data)
+{
+ switch (offset)
+ {
+ case 0x02:
+ m_keylatch = data & 0x0f;
+ break;
+
+ case 0x05:
+ m_cgc->bkg_w(1);
+ m_cgc->bkg_w(0);
+ break;
+ }
+}
+
+
+//-------------------------------------------------
+// vip_dma_w - DMA write
+//-------------------------------------------------
+
+void vp590_device::vip_dma_w(address_space &space, offs_t offset, UINT8 data)
+{
+ UINT8 mask = 0xff;
+
+ if (!m_a12)
+ {
+ // mask out A4 and A3
+ mask = 0xe7;
+ }
+
+ m_color = m_color_ram[offset & mask];
+
+ m_cgc->dma_w(space, offset, data);
+}
+
+
+//-------------------------------------------------
+// vip_screen_update - screen update
+//-------------------------------------------------
+
+UINT32 vp590_device::vip_screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
+{
+ m_cgc->screen_update(screen, bitmap, cliprect);
+
+ return 0;
+}
+
+
+//-------------------------------------------------
+// vip_ef3_r - EF3 read
+//-------------------------------------------------
+
+int vp590_device::vip_ef3_r()
+{
+ return BIT(m_j1->read(), m_keylatch) ? CLEAR_LINE : ASSERT_LINE;
+}
+
+
+//-------------------------------------------------
+// vip_ef4_r - EF4 read
+//-------------------------------------------------
+
+int vp590_device::vip_ef4_r()
+{
+ return BIT(m_j2->read(), m_keylatch) ? CLEAR_LINE : ASSERT_LINE;
+}