// license:BSD-3-Clause // copyright-holders:AJR /*********************************************************************************************************************************** Skeleton driver for Decision Data IS-48x/LM-48xC IBM-compatible coax workstation displays. ***********************************************************************************************************************************/ #include "emu.h" #include "cpu/i86/i186.h" #include "cpu/bcp/dp8344.h" #include "machine/eeprompar.h" #include "video/mc6845.h" #include "screen.h" class is48x_state : public driver_device { public: is48x_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_bcp(*this, "bcp") , m_crtc(*this, "crtc") { } void is482(machine_config &config); private: MC6845_UPDATE_ROW(update_row); void mem_map(address_map &map); void io_map(address_map &map); void bcp_inst_map(address_map &map); void bcp_data_map(address_map &map); required_device m_maincpu; required_device m_bcp; required_device m_crtc; }; MC6845_UPDATE_ROW(is48x_state::update_row) { } void is48x_state::mem_map(address_map &map) { map(0x00000, 0x07fff).ram(); // W24257S-70LL map(0x40000, 0x47fff).rw(m_bcp, FUNC(dp8344_device::remote_read), FUNC(dp8344_device::remote_write)); map(0x50000, 0x51fff).ram(); // CY7C185-35VC map(0x54000, 0x55fff).ram(); // CY7C185-35VC map(0x60000, 0x67fff).rw("eeprom", FUNC(eeprom_parallel_28xx_device::read), FUNC(eeprom_parallel_28xx_device::write)); map(0x80000, 0xfffff).rom().region("program", 0); } void is48x_state::io_map(address_map &map) { map(0x8005, 0x8005).nopw(); map(0x8080, 0x8080).w(m_crtc, FUNC(mc6845_device::address_w)); map(0x8081, 0x8081).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w)); map(0x8101, 0x8101).nopr(); map(0x8180, 0x8180).rw(m_bcp, FUNC(dp8344_device::cmd_r), FUNC(dp8344_device::cmd_w)); } void is48x_state::bcp_inst_map(address_map &map) { map(0x0000, 0x1fff).ram(); // CY7C185-35VC x2 } void is48x_state::bcp_data_map(address_map &map) { map(0x0000, 0x7fff).ram(); // W24257S-70LL map(0xc000, 0xffff).ram(); } static INPUT_PORTS_START(is482) INPUT_PORTS_END void is48x_state::is482(machine_config &config) { I80188(config, m_maincpu, 16_MHz_XTAL); // N80C188-16 m_maincpu->set_addrmap(AS_PROGRAM, &is48x_state::mem_map); m_maincpu->set_addrmap(AS_IO, &is48x_state::io_map); DP8344B(config, m_bcp, 18.867_MHz_XTAL); // DP8344BV m_bcp->set_auto_start(false); m_bcp->set_addrmap(AS_PROGRAM, &is48x_state::bcp_inst_map); m_bcp->set_addrmap(AS_DATA, &is48x_state::bcp_data_map); EEPROM_28256(config, "eeprom"); // AT28C256 screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_raw(60_MHz_XTAL / 2, 770, 0, 560, 532, 0, 475); // FIXME: vertical rate is supposed to be 75 Hz screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update)); HD6845S(config, m_crtc, 60_MHz_XTAL / 28); // HD46505SP-1 m_crtc->set_char_width(14); // guess m_crtc->set_screen("screen"); m_crtc->set_show_border_area(false); m_crtc->set_update_row_callback(FUNC(is48x_state::update_row)); } ROM_START(is482) // "IS-488-A" on case ROM_REGION(0x80000, "program", 0) ROM_LOAD("is-482_u67_s008533243.bin", 0x00000, 0x80000, CRC(1e23ac17) SHA1(aadc73bc0454c5b1c33d440dc511009dc6b7f9e0)) // M27C4001-10FI ROM_END COMP(199?, is482, 0, 0, is482, is482, is48x_state, empty_init, "Decision Data", "IS-482 Workstation", MACHINE_IS_SKELETON)