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Diffstat (limited to 'src/mame/drivers/systel1.cpp')
-rw-r--r-- | src/mame/drivers/systel1.cpp | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/src/mame/drivers/systel1.cpp b/src/mame/drivers/systel1.cpp deleted file mode 100644 index 98bd3af70bc..00000000000 --- a/src/mame/drivers/systel1.cpp +++ /dev/null @@ -1,231 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:AJR -/*************************************************************************** - - Skeleton driver for Systel System 1/System 100 computer. - - This minimalistic luggable computer has a green-screen monitor and - 5ΒΌ-inch floppy drive (Shugart SA455) built into the unit. The detached - keyboard may be replaced with a standard electric typewriter. - -***************************************************************************/ - -#include "emu.h" -#include "bus/rs232/rs232.h" -#include "cpu/z80/z80.h" -#include "imagedev/floppy.h" -#include "machine/clock.h" -#include "machine/input_merger.h" -#include "machine/i8251.h" -#include "machine/i8257.h" -#include "machine/wd_fdc.h" -#include "video/i8275.h" -#include "screen.h" - -class systel1_state : public driver_device -{ -public: - systel1_state(const machine_config &mconfig, device_type type, const char *tag) - : driver_device(mconfig, type, tag) - , m_maincpu(*this, "maincpu") - , m_dmac(*this, "dmac") - , m_fdc(*this, "fdc") - , m_floppy(*this, "fdc:0") - , m_rom(*this, "bootrom") - , m_chargen(*this, "chargen") - { - } - - void systel1(machine_config &config); - -protected: - virtual void machine_start() override; - virtual void machine_reset() override; - -private: - DECLARE_WRITE_LINE_MEMBER(hrq_w); - u8 memory_r(offs_t offset); - void memory_w(offs_t offset, u8 data); - void floppy_control_w(u8 data); - DECLARE_WRITE_LINE_MEMBER(rts_w); - DECLARE_WRITE_LINE_MEMBER(dtr_w); - - I8275_DRAW_CHARACTER_MEMBER(draw_character); - - void mem_map(address_map &map); - void io_map(address_map &map); - - required_device<cpu_device> m_maincpu; - required_device<i8257_device> m_dmac; - required_device<fd1797_device> m_fdc; - required_device<floppy_connector> m_floppy; - required_region_ptr<u8> m_rom; - required_region_ptr<u8> m_chargen; - - std::unique_ptr<u8[]> m_ram; - - bool m_boot_read; -}; - -void systel1_state::machine_start() -{ - m_ram = make_unique_clear<u8[]>(0x10000); - m_fdc->set_floppy(m_floppy->get_device()); - - save_item(NAME(m_boot_read)); - save_pointer(NAME(m_ram), 0x10000); -} - -void systel1_state::machine_reset() -{ - m_boot_read = true; -} - -WRITE_LINE_MEMBER(systel1_state::hrq_w) -{ - m_maincpu->set_input_line(INPUT_LINE_HALT, state); - m_dmac->hlda_w(state); -} - -u8 systel1_state::memory_r(offs_t offset) -{ - if (m_boot_read && offset < 0x4000) - return m_rom[offset & 0x7ff]; - else - return m_ram[offset]; -} - -void systel1_state::memory_w(offs_t offset, u8 data) -{ - m_ram[offset] = data; -} - -I8275_DRAW_CHARACTER_MEMBER(systel1_state::draw_character) -{ - u8 dots = lten ? 0xff : vsp ? 0 : m_chargen[(charcode << 4) | linecount]; - if (rvv) - dots ^= 0xff; - - for (int i = 0; i < 7; i++) - { - bitmap.pix32(y, x + i) = BIT(dots, 7) ? rgb_t::white() : rgb_t::black(); - dots <<= 1; - } -} - -void systel1_state::floppy_control_w(u8 data) -{ - if (m_floppy->get_device() != nullptr) - m_floppy->get_device()->ss_w(!BIT(data, 0)); - - m_boot_read = false; -} - -WRITE_LINE_MEMBER(systel1_state::rts_w) -{ - m_fdc->mr_w(state); - if (m_floppy->get_device() != nullptr) - m_floppy->get_device()->mon_w(!state); -} - -WRITE_LINE_MEMBER(systel1_state::dtr_w) -{ - // probably floppy-related -} - -void systel1_state::mem_map(address_map &map) -{ - map(0x0000, 0xffff).rw(FUNC(systel1_state::memory_r), FUNC(systel1_state::memory_w)); -} - -void systel1_state::io_map(address_map &map) -{ - map.global_mask(0xff); - map(0x00, 0x00).portr("JUMPERS"); - map(0x10, 0x11).rw("usart", FUNC(i8251_device::read), FUNC(i8251_device::write)); - map(0x20, 0x29).rw(m_dmac, FUNC(i8257_device::read), FUNC(i8257_device::write)); - map(0x30, 0x33).rw(m_fdc, FUNC(fd1797_device::read), FUNC(fd1797_device::write)); - map(0x40, 0x41).rw("crtc", FUNC(i8276_device::read), FUNC(i8276_device::write)); - map(0x70, 0x70).w(FUNC(systel1_state::floppy_control_w)); -} - -static INPUT_PORTS_START(systel1) - PORT_START("JUMPERS") - PORT_DIPNAME(0x01, 0x00, "System Mode") // TYPE/WP switch on the front of the unit - PORT_DIPSETTING(0x01, "Typewriter") - PORT_DIPSETTING(0x00, "Word Processor") - PORT_DIPNAME(0x02, 0x00, "Screen Refresh") // probably at J6 - PORT_DIPSETTING(0x02, "50 Hz") - PORT_DIPSETTING(0x00, "60 Hz") -INPUT_PORTS_END - -static void systel1_floppies(device_slot_interface &device) -{ - device.option_add("525dd", FLOPPY_525_DD); -} - -static DEVICE_INPUT_DEFAULTS_START(keyboard) - DEVICE_INPUT_DEFAULTS("RS232_TXBAUD", 0xff, RS232_BAUD_1200) -DEVICE_INPUT_DEFAULTS_END - -void systel1_state::systel1(machine_config &config) -{ - Z80(config, m_maincpu, 10.8864_MHz_XTAL / 4); // Z8400A; clock verified - m_maincpu->set_addrmap(AS_PROGRAM, &systel1_state::mem_map); - m_maincpu->set_addrmap(AS_IO, &systel1_state::io_map); - - input_merger_device &mainint(INPUT_MERGER_ANY_HIGH(config, "mainint")); - mainint.output_handler().set_inputline(m_maincpu, INPUT_LINE_IRQ0); - - I8257(config, m_dmac, 10.8864_MHz_XTAL / 4); // P8257-5 - m_dmac->out_hrq_cb().set(FUNC(systel1_state::hrq_w)); - m_dmac->in_memr_cb().set(FUNC(systel1_state::memory_r)); - m_dmac->out_memw_cb().set(FUNC(systel1_state::memory_w)); - m_dmac->in_ior_cb<1>().set(m_fdc, FUNC(fd1797_device::data_r)); - m_dmac->out_iow_cb<1>().set(m_fdc, FUNC(fd1797_device::data_w)); - m_dmac->out_iow_cb<2>().set("crtc", FUNC(i8276_device::dack_w)); - - i8251_device &usart(I8251(config, "usart", 10.8864_MHz_XTAL / 4)); // AMD P8251A - usart.rxrdy_handler().set("mainint", FUNC(input_merger_device::in_w<0>)); - usart.rts_handler().set(FUNC(systel1_state::rts_w)); - usart.dtr_handler().set(FUNC(systel1_state::dtr_w)); - - clock_device &baudclock(CLOCK(config, "baudclock", 2_MHz_XTAL / 104)); // 19.23 kHz verified; rate probably fixed - baudclock.signal_handler().set("usart", FUNC(i8251_device::write_rxc)); - baudclock.signal_handler().append("usart", FUNC(i8251_device::write_txc)); - - screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); - screen.set_color(rgb_t::green()); - screen.set_raw(10.8864_MHz_XTAL, 672, 0, 560, 270, 0, 250); - screen.set_screen_update("crtc", FUNC(i8276_device::screen_update)); - - i8276_device &crtc(I8276(config, "crtc", 10.8864_MHz_XTAL / 7)); // WD8276PL-00 - crtc.set_character_width(7); - crtc.set_display_callback(FUNC(systel1_state::draw_character)); - crtc.drq_wr_callback().set(m_dmac, FUNC(i8257_device::dreq2_w)); - crtc.irq_wr_callback().set("mainint", FUNC(input_merger_device::in_w<1>)); - - FD1797(config, m_fdc, 2_MHz_XTAL / 2); - m_fdc->drq_wr_callback().set(m_dmac, FUNC(i8257_device::dreq1_w)); - - FLOPPY_CONNECTOR(config, m_floppy, systel1_floppies, "525dd", floppy_image_device::default_floppy_formats); - m_floppy->set_fixed(true); - m_floppy->enable_sound(true); - - rs232_port_device &kb(RS232_PORT(config, "kb", default_rs232_devices, "keyboard")); - kb.set_option_device_input_defaults("keyboard", DEVICE_INPUT_DEFAULTS_NAME(keyboard)); - kb.rxd_handler().set("usart", FUNC(i8251_device::write_rxd)); -} - -// RAM: 8x MCM6665AP20 -// XTALs: 10.8864 (Y1), 2.000 (Y2) -// Silkscreened on PCB: "SYSTEL / SYSTEM 1 / 1031-3101-00 REV H" -ROM_START(systel100) - ROM_REGION(0x800, "bootrom", 0) // TMS2716JL-45 - ROM_LOAD("u11.bin", 0x000, 0x800, CRC(29f1414a) SHA1(c87adfaaec45d0e5f4cf5946d2f04de0332b3413)) - - ROM_REGION(0x800, "chargen", 0) // TMS2516JL-45 - ROM_LOAD("u16.bin", 0x000, 0x800, CRC(61a8d742) SHA1(69dada638a17353f91bff34a1e2319a35d8a3ebf)) -ROM_END - -COMP(198?, systel100, 0, 0, systel1, systel1, systel1_state, empty_init, "Systel Computers", "System 100", MACHINE_IS_SKELETON) |