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Diffstat (limited to 'src/mame/drivers/microkit.cpp')
-rw-r--r-- | src/mame/drivers/microkit.cpp | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/src/mame/drivers/microkit.cpp b/src/mame/drivers/microkit.cpp deleted file mode 100644 index 1861452e5ab..00000000000 --- a/src/mame/drivers/microkit.cpp +++ /dev/null @@ -1,193 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Curt Coder, Robbbert -/* - - RCA COSMAC Microkit - - http://www.vintagecomputer.net/browse_thread.cfm?id=511 - - Press CR or LF to get the * prompt. - Commands (must be in UPPERcase): - $Pxxxx - Jump to address xxxx - ?Mxxxx yyyy - Dump memory starting at xxxx for yyyy bytes - !Mxxxx yyzz... - Write data (yy etc) to memory xxxx onwards. - - There's no sound or storage facilities, therefore no software. - - The computer looks like a rack-mount metal box with a rudimentary front panel. - - Buttons are: Reset; Load; Run program; Run Utility - - There is a RUN LED. - - It also has a power switch and lamp, and a fuse. - - According to the schematic there are LEDs on every data, address and status line. - -*****************************************************************************************/ - -#include "emu.h" -#include "cpu/cosmac/cosmac.h" -#include "bus/rs232/rs232.h" -#include "machine/cdp1852.h" - - -class microkit_state : public driver_device -{ -public: - microkit_state(const machine_config &mconfig, device_type type, const char *tag) - : driver_device(mconfig, type, tag) - , m_a15(1) - , m_maincpu(*this, "maincpu") - , m_rom(*this, "maincpu") - , m_rs232(*this, "rs232") - { } - - void microkit(machine_config &config); - - DECLARE_INPUT_CHANGED_MEMBER(reset_button); - DECLARE_INPUT_CHANGED_MEMBER(runp_button); - DECLARE_INPUT_CHANGED_MEMBER(runu_button); - -private: - DECLARE_READ_LINE_MEMBER(clear_r); - DECLARE_WRITE8_MEMBER(ram_w); - DECLARE_READ8_MEMBER(ram_r); - - void microkit_io(address_map &map); - void microkit_mem(address_map &map); - - virtual void machine_start() override; - virtual void machine_reset() override; - std::unique_ptr<uint8_t[]> m_ram; - uint8_t m_resetcnt; - bool m_a15; - required_device<cosmac_device> m_maincpu; - required_memory_region m_rom; - required_device<rs232_port_device> m_rs232; -}; - -void microkit_state::microkit_mem(address_map &map) -{ - map(0x0000, 0x01ff).rw(FUNC(microkit_state::ram_r),FUNC(microkit_state::ram_w)); - map(0x0200, 0x0fff).ram(); - map(0x8000, 0x81ff).rom().region("maincpu", 0); // CDP1832.U2 - map(0x8c00, 0x8c1f).ram(); // CDP1824.U3 "Register Storage" -} - -void microkit_state::microkit_io(address_map &map) -{ - map(0x05, 0x05).r("u4", FUNC(cdp1852_device::read)).w("u4", FUNC(cdp1852_device::write)); // user output port - map(0x06, 0x06).r("u5", FUNC(cdp1852_device::read)).w("u5", FUNC(cdp1852_device::write)); // user input port - map(0x07, 0x07).nopw(); // writes lots of zeros here -} - -static INPUT_PORTS_START( microkit ) - PORT_START("RESET") - PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("RESET") PORT_CODE(KEYCODE_F3) PORT_CHANGED_MEMBER(DEVICE_SELF, microkit_state, reset_button, 0) - PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("RUN P") PORT_CODE(KEYCODE_F2) PORT_CHANGED_MEMBER(DEVICE_SELF, microkit_state, runp_button, 0) - PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("RUN U") PORT_CODE(KEYCODE_F1) PORT_CHANGED_MEMBER(DEVICE_SELF, microkit_state, runu_button, 0) -INPUT_PORTS_END - -INPUT_CHANGED_MEMBER(microkit_state::reset_button) -{ - m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE); - m_resetcnt = 0; -} - -INPUT_CHANGED_MEMBER(microkit_state::runp_button) -{ - m_a15 = 0; - m_resetcnt = 0; - m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE); -} - -INPUT_CHANGED_MEMBER(microkit_state::runu_button) -{ - m_a15 = 1; - m_resetcnt = 0; - m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE); -} - -READ_LINE_MEMBER( microkit_state::clear_r ) -{ - if (m_resetcnt < 0x20) - m_resetcnt++; - - if (m_resetcnt < 0x10) - return 0; - else - if (m_resetcnt == 0x1c) - m_a15 = 0; - - return 1; -} - -READ8_MEMBER( microkit_state::ram_r ) -{ - if (m_a15) - return m_rom->base()[offset]; - else - return m_ram[offset]; -} - -WRITE8_MEMBER( microkit_state::ram_w ) -{ - m_ram[offset] = data; -} - -void microkit_state::machine_reset() -{ - m_resetcnt = 0; - m_maincpu->reset(); -} - -void microkit_state::machine_start() -{ - // Register save state - save_item(NAME(m_resetcnt)); - save_item(NAME(m_a15)); - m_ram = make_unique_clear<uint8_t[]>(0x200); - save_pointer(NAME(m_ram), 0x200); -} - -static DEVICE_INPUT_DEFAULTS_START( serial_keyb ) - DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_300 ) - DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_300 ) - DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 ) - DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_7 ) - DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_MARK ) - DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_2 ) -DEVICE_INPUT_DEFAULTS_END - - -void microkit_state::microkit(machine_config &config) -{ - // basic machine hardware - CDP1802(config, m_maincpu, 2_MHz_XTAL); - m_maincpu->set_addrmap(AS_PROGRAM, µkit_state::microkit_mem); - m_maincpu->set_addrmap(AS_IO, µkit_state::microkit_io); - m_maincpu->wait_cb().set_constant(1); - m_maincpu->clear_cb().set(FUNC(microkit_state::clear_r)); - m_maincpu->q_cb().set(m_rs232, FUNC(rs232_port_device::write_txd)).invert(); - - /* video hardware */ - RS232_PORT(config, m_rs232, default_rs232_devices, "terminal"); - m_rs232->rxd_handler().set_inputline(m_maincpu, COSMAC_INPUT_LINE_EF4); - m_rs232->set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(serial_keyb)); - - cdp1852_device &u4(CDP1852(config, "u4")); - u4.mode_cb().set_constant(1); // output - - cdp1852_device &u5(CDP1852(config, "u5")); - u5.mode_cb().set_constant(0); // input -} - -ROM_START( microkit ) - ROM_REGION( 0x200, "maincpu", 0 ) - ROM_LOAD( "ut4.u2", 0x0000, 0x0200, CRC(ba642f8e) SHA1(8975a4c6a0bb699b53c753946aac54860054246a) ) - - // These are bad, with heaps of bugs - //ROM_REGION( 0x200, "maincpu", ROMREGION_INVERT ) - //ROM_LOAD( "3.2b", 0x000, 0x100, CRC(6799357e) SHA1(c46e3322b8b1b6534a7da04806be29fa265951b7) ) - //ROM_LOAD( "4.2a", 0x100, 0x100, CRC(27267bad) SHA1(838df9be2dc175584a1a6ee1770039118e49482e) ) - -ROM_END - -COMP( 1975, microkit, 0, 0, microkit, microkit, microkit_state, empty_init, "RCA", "COSMAC Microkit", MACHINE_SUPPORTS_SAVE ) |