diff options
Diffstat (limited to 'src/devices/bus/nubus/nubus_radiustpd.c')
-rw-r--r-- | src/devices/bus/nubus/nubus_radiustpd.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/src/devices/bus/nubus/nubus_radiustpd.c b/src/devices/bus/nubus/nubus_radiustpd.c new file mode 100644 index 00000000000..3b30fc4a384 --- /dev/null +++ b/src/devices/bus/nubus/nubus_radiustpd.c @@ -0,0 +1,214 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont +/*************************************************************************** + + Radius Two Page Display (1280x960?) + + Fsx8000a = DAC data + Fsx8000e = DAC control + Fsx00000 = VRAM (offset 0x200, stride 0x1b0) + +***************************************************************************/ + +#include "emu.h" +#include "nubus_radiustpd.h" + +#define RADIUSTPD_SCREEN_NAME "tpd_screen" +#define RADIUSTPD_ROM_REGION "tpd_rom" + +#define VRAM_SIZE (0x40000) // 256k. 1152x880 1 bit per pixel fits nicely. + +MACHINE_CONFIG_FRAGMENT( radiustpd ) + MCFG_SCREEN_ADD( RADIUSTPD_SCREEN_NAME, RASTER) + MCFG_SCREEN_UPDATE_DEVICE(DEVICE_SELF, nubus_radiustpd_device, screen_update) + MCFG_SCREEN_SIZE(1280, 960) + MCFG_SCREEN_REFRESH_RATE(70) + MCFG_SCREEN_VISIBLE_AREA(0, 1152-1, 0, 880-1) +MACHINE_CONFIG_END + +ROM_START( radiustpd ) + ROM_REGION(0x8000, RADIUSTPD_ROM_REGION, 0) + ROM_LOAD( "tpd_v22.bin", 0x0000, 0x8000, CRC(7dc5ed05) SHA1(4abb64e49201e966c17a255a94b670564b229934) ) +ROM_END + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type NUBUS_RADIUSTPD = &device_creator<nubus_radiustpd_device>; + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor nubus_radiustpd_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( radiustpd ); +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *nubus_radiustpd_device::device_rom_region() const +{ + return ROM_NAME( radiustpd ); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// nubus_radiustpd_device - constructor +//------------------------------------------------- + +nubus_radiustpd_device::nubus_radiustpd_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, NUBUS_RADIUSTPD, "Radius Two Page Display video card", tag, owner, clock, "nb_rtpd", __FILE__), + device_video_interface(mconfig, *this), + device_nubus_card_interface(mconfig, *this) +{ + m_assembled_tag = std::string(tag).append(":").append(RADIUSTPD_SCREEN_NAME); + m_screen_tag = m_assembled_tag.c_str(); +} + +nubus_radiustpd_device::nubus_radiustpd_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_video_interface(mconfig, *this), + device_nubus_card_interface(mconfig, *this) +{ + m_assembled_tag = std::string(tag).append(":").append(RADIUSTPD_SCREEN_NAME); + m_screen_tag = m_assembled_tag.c_str(); +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void nubus_radiustpd_device::device_start() +{ + UINT32 slotspace; + + // set_nubus_device makes m_slot valid + set_nubus_device(); + install_declaration_rom(this, RADIUSTPD_ROM_REGION, true, true); + + slotspace = get_slotspace(); + + printf("[radiustpd %p] slotspace = %x\n", (void *)this, slotspace); + + m_vram.resize(VRAM_SIZE); + m_vram32 = (UINT32 *)&m_vram[0]; + + m_nubus->install_device(slotspace, slotspace+VRAM_SIZE-1, read32_delegate(FUNC(nubus_radiustpd_device::vram_r), this), write32_delegate(FUNC(nubus_radiustpd_device::vram_w), this)); + m_nubus->install_device(slotspace+0x900000, slotspace+VRAM_SIZE-1+0x900000, read32_delegate(FUNC(nubus_radiustpd_device::vram_r), this), write32_delegate(FUNC(nubus_radiustpd_device::vram_w), this)); + m_nubus->install_device(slotspace+0x80000, slotspace+0xeffff, read32_delegate(FUNC(nubus_radiustpd_device::radiustpd_r), this), write32_delegate(FUNC(nubus_radiustpd_device::radiustpd_w), this)); + m_nubus->install_device(slotspace+0x980000, slotspace+0x9effff, read32_delegate(FUNC(nubus_radiustpd_device::radiustpd_r), this), write32_delegate(FUNC(nubus_radiustpd_device::radiustpd_w), this)); + + m_timer = timer_alloc(0, NULL); + m_timer->adjust(m_screen->time_until_pos(479, 0), 0); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void nubus_radiustpd_device::device_reset() +{ + m_count = 0; + m_clutoffs = 0; + m_vbl_disable = 1; + m_mode = 0; + memset(&m_vram[0], 0, VRAM_SIZE); + memset(m_palette, 0, sizeof(m_palette)); + + m_palette[1] = rgb_t(255, 255, 255); + m_palette[0] = rgb_t(0, 0, 0); +} + + +void nubus_radiustpd_device::device_timer(emu_timer &timer, device_timer_id tid, int param, void *ptr) +{ + if (!m_vbl_disable) + { + raise_slot_irq(); + } + + m_timer->adjust(m_screen->time_until_pos(479, 0), 0); +} + +/*************************************************************************** + + Two Page Display section + +***************************************************************************/ + +UINT32 nubus_radiustpd_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) +{ + UINT32 *scanline; + int x, y; + UINT8 pixels, *vram; + + vram = &m_vram[0x200]; + + for (y = 0; y < 880; y++) + { + scanline = &bitmap.pix32(y); + for (x = 0; x < 1152/8; x++) + { + pixels = vram[(y * (1152/8)) + (BYTE4_XOR_BE(x))]; + + *scanline++ = m_palette[((pixels>>7)&0x1)]; + *scanline++ = m_palette[((pixels>>6)&0x1)]; + *scanline++ = m_palette[((pixels>>5)&0x1)]; + *scanline++ = m_palette[((pixels>>4)&0x1)]; + *scanline++ = m_palette[((pixels>>3)&0x1)]; + *scanline++ = m_palette[((pixels>>2)&0x1)]; + *scanline++ = m_palette[((pixels>>1)&0x1)]; + *scanline++ = m_palette[(pixels&1)]; + } + } + + return 0; +} + +WRITE32_MEMBER( nubus_radiustpd_device::radiustpd_w ) +{ +// printf("TPD: write %08x to %x, mask %08x\n", data, offset, mem_mask); +} + +READ32_MEMBER( nubus_radiustpd_device::radiustpd_r ) +{ +// printf("TPD: read @ %x, mask %08x\n", offset, mem_mask); + + if (offset == 0) + { + lower_slot_irq(); + m_vbl_disable = true; + } + + if (offset == 0x8000) + { + m_vbl_disable = false; + } + + if (offset == 0x18000) + { + return 0xffffffff; + } + + return 0; +} + +WRITE32_MEMBER( nubus_radiustpd_device::vram_w ) +{ + data ^= 0xffffffff; + COMBINE_DATA(&m_vram32[offset]); +} + +READ32_MEMBER( nubus_radiustpd_device::vram_r ) +{ + return m_vram32[offset] ^ 0xffffffff; +} |