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https://github.com/holub/mame
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New working systems
------------------- Liberty Electronics Freedom 200 [Bitsavers] - Rename freedom220.cpp to freedom200.cpp - Add support for font selection - Improve double-width support - Support 'invisible' attribute - Reduce NVRAM size
This commit is contained in:
Dirk Best
parent
d798958d5c
commit
a4732500a5
@ -2,8 +2,10 @@
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// copyright-holders: Dirk Best
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/****************************************************************************
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Liberty Electronics Freedom 220 Video Display Terminal
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Liberty Electronics Freedom 200 Video Display Terminal
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Serial terminal
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Liberty Electronics Freedom 220 Video Display Terminal
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VT220 compatible serial terminal
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Hardware:
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@ -26,10 +28,10 @@
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- Expansion slot
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TODO:
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- Font selection
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- Light/dark background
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- Soft scroll
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- Pixel clock, characters should be 9 pixels?
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- I/O write to 0xc0
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Notes:
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- On first boot you will get an "error 8" - this is because
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@ -60,10 +62,10 @@ namespace {
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// TYPE DEFINITIONS
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//**************************************************************************
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class freedom220_state : public driver_device
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class freedom200_state : public driver_device
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{
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public:
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freedom220_state(const machine_config &mconfig, device_type type, const char *tag) :
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freedom200_state(const machine_config &mconfig, device_type type, const char *tag) :
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driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_avdc(*this, "avdc"),
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@ -74,11 +76,10 @@ public:
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m_translate(*this, "translate"),
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m_charram(*this, "charram%u", 0U),
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m_attrram(*this, "attrram%u", 0U),
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m_video_ctrl(0x00),
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m_dw_active(false)
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m_video_ctrl(0x00)
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{ }
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void freedom220(machine_config &config);
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void freedom200(machine_config &config);
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protected:
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virtual void machine_start() override;
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@ -96,7 +97,14 @@ private:
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required_shared_ptr_array<uint8_t, 2> m_attrram;
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uint8_t m_video_ctrl;
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// double width support
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bool m_dw_active;
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uint8_t m_dw_char;
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uint8_t m_dw_attr;
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bool m_dw_ul;
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bool m_dw_blink;
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bool m_dw_cursor;
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void mem_map(address_map &map);
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void io_map(address_map &map);
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@ -113,17 +121,18 @@ private:
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// ADDRESS MAPS
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//**************************************************************************
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void freedom220_state::mem_map(address_map &map)
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void freedom200_state::mem_map(address_map &map)
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{
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map(0x0000, 0x5fff).rom();
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map(0x8000, 0x87ff).ram().share(m_charram[0]);
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map(0x8800, 0x8fff).ram().share(m_attrram[0]);
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map(0x9000, 0x97ff).ram().share(m_charram[1]);
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map(0x9800, 0x9fff).ram().share(m_attrram[1]);
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map(0xa000, 0xafff).ram().share("nvram"); // actual NVRAM possibly only 0x800 in size
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map(0xa000, 0xa7ff).ram().share("nvram");
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map(0xa800, 0xafff).ram().share("workram");
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}
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void freedom220_state::io_map(address_map &map)
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void freedom200_state::io_map(address_map &map)
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{
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map.global_mask(0xff);
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map(0x00, 0x07).rw(m_avdc, FUNC(scn2674_device::read), FUNC(scn2674_device::write));
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@ -131,7 +140,8 @@ void freedom220_state::io_map(address_map &map)
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map(0x40, 0x41).rw(m_usart[0], FUNC(i8251_device::read), FUNC(i8251_device::write));
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map(0x60, 0x61).rw(m_usart[1], FUNC(i8251_device::read), FUNC(i8251_device::write));
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map(0x80, 0x81).rw(m_usart[2], FUNC(i8251_device::read), FUNC(i8251_device::write));
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map(0xa0, 0xa0).w(FUNC(freedom220_state::video_ctrl_w));
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map(0xa0, 0xa0).w(FUNC(freedom200_state::video_ctrl_w));
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// c0 - used by free200 only
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}
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@ -139,53 +149,76 @@ void freedom220_state::io_map(address_map &map)
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// VIDEO EMULATION
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//**************************************************************************
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void freedom220_state::char_map(address_map &map)
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void freedom200_state::char_map(address_map &map)
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{
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map(0x0000, 0x07ff).ram().share(m_charram[0]);
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map(0x1000, 0x17ff).ram().share(m_charram[1]);
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map(0x2000, 0x2fff).ram().share("nvram");
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map(0x2000, 0x27ff).ram().share("nvram");
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map(0x2800, 0x2fff).ram().share("workram");
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}
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void freedom220_state::attr_map(address_map &map)
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void freedom200_state::attr_map(address_map &map)
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{
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map(0x0000, 0x07ff).ram().share(m_attrram[0]);
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map(0x1000, 0x17ff).ram().share(m_attrram[1]);
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map(0x2000, 0x2fff).ram().share("nvram");
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map(0x2000, 0x27ff).ram().share("workram");
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map(0x2800, 0x2fff).ram().share("workram");
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}
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void freedom220_state::avdc_intr_w(int state)
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void freedom200_state::avdc_intr_w(int state)
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{
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if (state)
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m_maincpu->pulse_input_line(INPUT_LINE_NMI, attotime::zero);
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}
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void freedom220_state::video_ctrl_w(uint8_t data)
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void freedom200_state::video_ctrl_w(uint8_t data)
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{
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// 7------- unknown
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// -6------ unknown
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// --5----- unknown
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// ---432-- font select
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// ---432-- translation table bit 210
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// ------1- normal/reverse video
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// -------0 unknown
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// -------0 translation table bit 3
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logerror("video_ctrl_w: %02x\n", data);
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m_video_ctrl = data;
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}
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SCN2674_DRAW_CHARACTER_MEMBER( freedom220_state::draw_character )
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SCN2674_DRAW_CHARACTER_MEMBER( freedom200_state::draw_character )
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{
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// 765----- unknown
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// ---4---- normal/bold
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// ----3--- underline
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// -----2-- invert
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// ------1- blink
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// -------0 unknown
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// -------0 invisible
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const pen_t *const pen = m_palette->pens();
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// translation table
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const int table = 0; // 0-f
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// either save or restore attributes for double-width
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if (dw)
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{
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if (m_dw_active)
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{
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charcode = m_dw_char;
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attrcode = m_dw_attr;
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ul = m_dw_ul;
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blink = m_dw_blink;
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cursor = m_dw_cursor;
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}
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else
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{
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m_dw_char = charcode;
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m_dw_attr = attrcode;
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m_dw_ul = ul;
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m_dw_blink = blink;
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m_dw_cursor = cursor;
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}
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}
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// apply translation table
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const int table = bitswap<4>(m_video_ctrl, 0, 4, 3, 2);
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charcode = m_translate[(table << 8) | charcode];
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uint8_t data = m_chargen[charcode << 4 | linecount];
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@ -196,6 +229,9 @@ SCN2674_DRAW_CHARACTER_MEMBER( freedom220_state::draw_character )
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if (blink && (BIT(attrcode, 1)))
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data = 0x00;
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if (BIT(attrcode, 0))
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data = 0x00;
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if (BIT(attrcode, 2))
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data = ~data;
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@ -247,14 +283,19 @@ GFXDECODE_END
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// MACHINE EMULATION
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//**************************************************************************
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void freedom220_state::machine_start()
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void freedom200_state::machine_start()
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{
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// register for save states
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save_item(NAME(m_video_ctrl));
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save_item(NAME(m_dw_active));
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save_item(NAME(m_dw_char));
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save_item(NAME(m_dw_attr));
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save_item(NAME(m_dw_ul));
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save_item(NAME(m_dw_blink));
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save_item(NAME(m_dw_cursor));
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}
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void freedom220_state::machine_reset()
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void freedom200_state::machine_reset()
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{
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m_dw_active = false;
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@ -268,11 +309,11 @@ void freedom220_state::machine_reset()
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// MACHINE DEFINTIONS
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//**************************************************************************
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void freedom220_state::freedom220(machine_config &config)
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void freedom200_state::freedom200(machine_config &config)
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{
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Z80(config, m_maincpu, 4_MHz_XTAL);
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m_maincpu->set_addrmap(AS_PROGRAM, &freedom220_state::mem_map);
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m_maincpu->set_addrmap(AS_IO, &freedom220_state::io_map);
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m_maincpu->set_addrmap(AS_PROGRAM, &freedom200_state::mem_map);
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m_maincpu->set_addrmap(AS_IO, &freedom200_state::io_map);
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input_merger_device &irq(INPUT_MERGER_ANY_HIGH(config, "irq"));
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irq.output_handler().set_inputline("maincpu", INPUT_LINE_IRQ0);
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@ -289,12 +330,12 @@ void freedom220_state::freedom220(machine_config &config)
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GFXDECODE(config, "gfxdecode", m_palette, chars);
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SCN2674(config, m_avdc, 16000000 / 8); // clock unverified
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m_avdc->intr_callback().set(FUNC(freedom220_state::avdc_intr_w));
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m_avdc->intr_callback().set(FUNC(freedom200_state::avdc_intr_w));
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m_avdc->set_screen(m_screen);
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m_avdc->set_character_width(8); // unverified
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m_avdc->set_addrmap(0, &freedom220_state::char_map);
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m_avdc->set_addrmap(1, &freedom220_state::attr_map);
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m_avdc->set_display_callback(FUNC(freedom220_state::draw_character));
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m_avdc->set_addrmap(0, &freedom200_state::char_map);
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m_avdc->set_addrmap(1, &freedom200_state::attr_map);
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m_avdc->set_display_callback(FUNC(freedom200_state::draw_character));
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pit8253_device &pit(PIT8253(config, "pit", 0));
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pit.set_clk<0>(18.432_MHz_XTAL / 10);
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@ -340,6 +381,19 @@ void freedom220_state::freedom220(machine_config &config)
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// ROM DEFINITIONS
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//**************************************************************************
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ROM_START( free200 )
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ROM_REGION(0x6000, "maincpu", 0)
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ROM_LOAD("m120020.ic213", 0x0000, 0x2000, CRC(869de37e) SHA1(22f9c847aa8d99c22791df7a40a7c1d67f21516b))
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ROM_LOAD("m220020.ic212", 0x2000, 0x2000, CRC(85095c20) SHA1(e7515c8b188732e391015f20ad38207876850589))
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ROM_LOAD("m320020.ic214", 0x4000, 0x2000, CRC(827cafe6) SHA1(887d78bfbfcdc07efc35a7c560822b1386300632))
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ROM_REGION(0x1000, "chargen", 0)
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ROM_LOAD("g020010.bin", 0x0000, 0x1000, CRC(b99bf3b1) SHA1(799395694d2f88c68230ce7f6bf5453b799926f4))
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ROM_REGION(0x1000, "translate", 0)
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ROM_LOAD("t020010.bin", 0x0000, 0x1000, CRC(19f9c677) SHA1(903eb82b2a7b63d79c00085c8c7ec2cb9583e2a0))
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ROM_END
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ROM_START( free220 )
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ROM_REGION(0x6000, "maincpu", 0)
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ROM_LOAD("m122010__8cdd.ic213", 0x0000, 0x2000, CRC(a1181809) SHA1(0ec0fd30c8a55f0bb9e1c6453120ab9a696f9041))
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@ -362,4 +416,5 @@ ROM_END
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//**************************************************************************
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// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
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COMP( 1984, free220, 0, 0, freedom220, 0, freedom220_state, empty_init, "Liberty Electronics", "Freedom 220", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )
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COMP( 1983, free200, 0, 0, freedom200, 0, freedom200_state, empty_init, "Liberty Electronics", "Freedom 200", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )
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COMP( 1984, free220, 0, 0, freedom200, 0, freedom200_state, empty_init, "Liberty Electronics", "Freedom 220", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )
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@ -24477,7 +24477,8 @@ adm36 //
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@source:liberty/freedom120.cpp
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free120 // (c) 1993 Liberty Electronics
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@source:liberty/freedom220.cpp
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@source:liberty/freedom200.cpp
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free200 // (c) 1983 Liberty Electronics
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free220 // (c) 1984 Liberty Electronics
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@source:lsi/m3.cpp
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