// license:BSD-3-Clause // copyright-holders:AJR /**************************************************************************** Skeleton driver for MC88100-based NCD X terminals. ****************************************************************************/ /* * WIP notes * * 88k "base" (19c, 19g, 17cr, 19cp) * - https://web-docs.gsi.de/~kraemer/COLLECTION/ftp.ncd.com/pub/ncd/Archive/NCD-Articles/NCD_X_Terminals/Memory_specs/NCD_88k_family_memory_specs * * MCX * - 2MB code and 4MB data memory on motherboard * - J10 SIMM slot for code, J11/J12 for data * - Code memory can be added as 256Kx32, 512Kx32, 1Mx32, 2Mx32, 4Mx32, * or 8Mx32 SIMMs. Data memory can be added as 1Mx32, 2Mx32, 4Mx32, * or 8Mx32 SIMMs. * - 256Kx32 and 512Kx32 SIMMs are only supported as code memory * */ #include "emu.h" #include "cpu/m88000/m88000.h" #include "machine/mc68681.h" #include "machine/am79c90.h" #include "machine/eepromser.h" #include "bus/rs232/rs232.h" #include "video/bt45x.h" #include "video/bt47x.h" #include "screen.h" class ncd88k_state : public driver_device { public: ncd88k_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_screen(*this, "screen") , m_ramdac(*this, "ramdac") , m_vram(*this, "vram") { } void ncd19c(machine_config &config); private: u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); void code_map(address_map &map); void data_map(address_map &map); required_device m_maincpu; required_device m_screen; required_device m_ramdac; required_shared_ptr m_vram; }; u32 ncd88k_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { u32 *pixel_pointer = m_vram; for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++) { for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 4) { u32 const pixel_data = *pixel_pointer++; bitmap.pix(y, x + 0) = m_ramdac->pen_color(u8(pixel_data >> 24)); bitmap.pix(y, x + 1) = m_ramdac->pen_color(u8(pixel_data >> 16)); bitmap.pix(y, x + 2) = m_ramdac->pen_color(u8(pixel_data >> 8)); bitmap.pix(y, x + 3) = m_ramdac->pen_color(u8(pixel_data >> 0)); } // compensate by 2048 - 1280 pixels per line pixel_pointer += 0xc0; } return 0; } void ncd88k_state::code_map(address_map &map) { map(0x00000000, 0x0001cfff).rom().region("program", 0); map(0x04000000, 0x07ffffff).ram().share("coderam"); } void ncd88k_state::data_map(address_map &map) { map(0x00000000, 0x0001cfff).rom().region("program", 0); map(0x01000000, 0x0100003f).rw("duart", FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0xff000000); map(0x01400000, 0x0140001f).m(m_ramdac, FUNC(bt458_device::map)).umask32(0xff000000); map(0x04000000, 0x07ffffff).ram().share("coderam"); map(0x08000000, 0x0d03ffff).ram().share("dataram"); map(0x0e000000, 0x0e1fffff).ram().share("vram"); } static INPUT_PORTS_START(ncd19c) INPUT_PORTS_END void ncd88k_state::ncd19c(machine_config &config) { MC88100(config, m_maincpu, 15'000'000); m_maincpu->set_addrmap(AS_PROGRAM, &ncd88k_state::code_map); m_maincpu->set_addrmap(AS_DATA, &ncd88k_state::data_map); SCN2681(config, "duart", 3'686'400); BT458(config, m_ramdac, 0); SCREEN(config, m_screen, SCREEN_TYPE_RASTER); m_screen->set_raw(125'000'000, 1680, 0, 1280, 1063, 0, 1024); // 74.4 kHz horizontal, 70 Hz vertical m_screen->set_screen_update(FUNC(ncd88k_state::screen_update)); } ROM_START(ncd19c) ROM_REGION32_BE(0x20000, "program", ROMREGION_ERASE00) // These dumps have very strange lengths. The actual ROMs should be standard EEPROM types. ROM_LOAD16_BYTE("ncd19c-e.rom", 0x0000, 0xb000, CRC(01e31b42) SHA1(28da6e4465415d00a739742ded7937a144129aad) BAD_DUMP) ROM_LOAD16_BYTE("ncd19c-o.rom", 0x0001, 0xb000, CRC(dfd9be7c) SHA1(2e99a325b039f8c3bb89833cd1940e6737b64d79) BAD_DUMP) ROM_END class ncdmcx_state : public driver_device { public: ncdmcx_state(machine_config const &mconfig, device_type type, char const *tag) : driver_device(mconfig, type, tag) , m_cpu(*this, "cpu") , m_eeprom(*this, "eeprom") , m_lance(*this, "lance") , m_duart(*this, "duart") , m_ramdac(*this, "ramdac") , m_screen(*this, "screen") , m_vram(*this, "vram") { } void ncdmcx(machine_config &config); private: u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rectangle const &cliprect); void code_map(address_map &map); void data_map(address_map &map); required_device m_cpu; required_device m_eeprom; required_device m_lance; required_device m_duart; required_device m_ramdac; required_device m_screen; required_shared_ptr m_vram; }; u32 ncdmcx_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rectangle const &cliprect) { u32 *pixel_pointer = m_vram; for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++) { for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 4) { u32 const pixel_data = *pixel_pointer++; bitmap.pix(y, x + 0) = m_ramdac->pen_color(u8(pixel_data >> 24)); bitmap.pix(y, x + 1) = m_ramdac->pen_color(u8(pixel_data >> 16)); bitmap.pix(y, x + 2) = m_ramdac->pen_color(u8(pixel_data >> 8)); bitmap.pix(y, x + 3) = m_ramdac->pen_color(u8(pixel_data >> 0)); } // compensate by 2048 - 1280 pixels per line pixel_pointer += 0xc0; } return 0; } void ncdmcx_state::ncdmcx(machine_config &config) { MC88100(config, m_cpu, 80_MHz_XTAL / 4); m_cpu->set_addrmap(AS_PROGRAM, &ncdmcx_state::code_map); m_cpu->set_addrmap(AS_DATA, &ncdmcx_state::data_map); // CAT35C104P 256x16 or 512x8 4K-Bit SERIAL E2PROM EEPROM_93C66_8BIT(config, m_eeprom); // ICD2061ASC-1 // 4100004 AM79C90(config, m_lance, 20_MHz_XTAL); SCN2681(config, m_duart, 3'686'400); // ATT20C497-11 BT477(config, m_ramdac, 125'000'000); SCREEN(config, m_screen, SCREEN_TYPE_RASTER); m_screen->set_raw(125'000'000, 1680, 0, 1280, 1063, 0, 1024); // 74.4 kHz horizontal, 70 Hz vertical m_screen->set_screen_update(FUNC(ncdmcx_state::screen_update)); } void ncdmcx_state::code_map(address_map &map) { map(0x00000000, 0x0003ffff).rom().region("program", 0); map(0x04000000, 0x07ffffff).ram().share("coderam"); } void ncdmcx_state::data_map(address_map &map) { map(0x00000000, 0x0003ffff).rom().region("program", 0); map(0x01000000, 0x0100003f).rw(m_duart, FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0xff000000); map(0x01400000, 0x0140001f).m(m_ramdac, FUNC(bt477_device::map)).umask32(0xff000000); // bit 0 -> icd2061a clock // bit 1 -> icd2016a data map(0x01580000, 0x01580003).nopw(); map(0x04000000, 0x07ffffff).ram().share("coderam"); // maximum 64M map(0x08000000, 0x0dffffff).ram().share("dataram"); // maximum 96M map(0x0e000000, 0x0e3fffff).ram().share("vram"); } ROM_START(ncdmcx) ROM_REGION32_BE(0x40000, "program", 0) ROM_LOAD16_BYTE("ncd88k_mcx_bm.u3", 0x0000, 0x20000, CRC(70305680) SHA1(b10b250fe319e823cff28ba7b449b0a40755f5a2)) ROM_LOAD16_BYTE("ncd88k_mcx_bm.u14", 0x0001, 0x20000, CRC(fc066464) SHA1(fa894de56b77bd4bc619040a2cf3a0d260914727)) ROM_END COMP(1990, ncd19c, 0, 0, ncd19c, ncd19c, ncd88k_state, empty_init, "Network Computing Devices", "19c", MACHINE_IS_SKELETON) COMP(1990, ncdmcx, 0, 0, ncdmcx, 0, ncdmcx_state, empty_init, "Network Computing Devices", "MCX", MACHINE_IS_SKELETON)