diff options
Diffstat (limited to 'src/devices/bus/vip/vp590.cpp')
-rw-r--r-- | src/devices/bus/vip/vp590.cpp | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/src/devices/bus/vip/vp590.cpp b/src/devices/bus/vip/vp590.cpp new file mode 100644 index 00000000000..e4a045388dd --- /dev/null +++ b/src/devices/bus/vip/vp590.cpp @@ -0,0 +1,261 @@ +// 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; +} |