mirror of
https://github.com/holub/mame
synced 2025-07-04 09:28:51 +03:00
att4425: new skeleton (AT&T 4425 / Teletype 56D text terminal)
This commit is contained in:
Sergey Svishchev
Vas Crabb
parent
9d1ead914c
commit
a3cdd96349
@ -3391,6 +3391,7 @@ files {
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MAME_DIR .. "src/mame/drivers/anzterm.cpp",
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MAME_DIR .. "src/mame/drivers/anzterm.cpp",
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MAME_DIR .. "src/mame/drivers/applix.cpp",
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MAME_DIR .. "src/mame/drivers/applix.cpp",
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MAME_DIR .. "src/mame/drivers/argox.cpp",
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MAME_DIR .. "src/mame/drivers/argox.cpp",
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MAME_DIR .. "src/mame/drivers/att4425.cpp",
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MAME_DIR .. "src/mame/drivers/attache.cpp",
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MAME_DIR .. "src/mame/drivers/attache.cpp",
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MAME_DIR .. "src/mame/drivers/aussiebyte.cpp",
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MAME_DIR .. "src/mame/drivers/aussiebyte.cpp",
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MAME_DIR .. "src/mame/includes/aussiebyte.h",
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MAME_DIR .. "src/mame/includes/aussiebyte.h",
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289
src/mame/drivers/att4425.cpp
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289
src/mame/drivers/att4425.cpp
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@ -0,0 +1,289 @@
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// license:BSD-3-Clause
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// copyright-holders:Sergey Svishchev
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/***************************************************************************
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AT&T model 4425 text terminal with mosaic graphics character set
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Also known as Teletype model 56D.
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Skeleton driver. This terminal is supported by netpbm -- pbmto4425(1)
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To do:
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- keyboard
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- everything else
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****************************************************************************/
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#include "emu.h"
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#include "cpu/z80/z80.h"
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#include "machine/clock.h"
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#include "machine/i8251.h"
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#include "machine/ram.h"
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#include "machine/z80ctc.h"
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#include "machine/z80sio.h"
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#include "bus/rs232/rs232.h"
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#include "machine/keyboard.h"
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#include "screen.h"
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#define SCREEN_TAG "screen"
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#define Z80_TAG "maincpu"
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#define Z80CTC_TAG "z80ctc"
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#define Z80SIO_TAG "z80sio"
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#define RS232_A_TAG "sioa"
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#define RS232_B_TAG "siob"
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#define I8251_TAG "i8251"
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class att4425_state : public driver_device
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{
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public:
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att4425_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, Z80_TAG)
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, m_i8251(*this, I8251_TAG)
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, m_sio(*this, Z80SIO_TAG)
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, m_p_videoram(*this, "videoram")
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, m_p_chargen(*this, "chargen")
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, m_screen(*this, SCREEN_TAG)
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{ }
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DECLARE_WRITE_LINE_MEMBER(write_line_clock);
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DECLARE_WRITE_LINE_MEMBER(write_keyboard_clock);
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uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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private:
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virtual void machine_start() override;
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virtual void video_start() override;
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required_device<z80_device> m_maincpu;
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required_device<i8251_device> m_i8251;
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required_device<z80sio_device> m_sio;
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required_shared_ptr<uint8_t> m_p_videoram;
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required_region_ptr<u8> m_p_chargen;
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required_device<screen_device> m_screen;
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};
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/* Memory Maps */
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static ADDRESS_MAP_START( att4425_mem, AS_PROGRAM, 8, att4425_state )
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AM_RANGE(0x0000, 0x7fff) AM_ROM AM_REGION(Z80_TAG, 0)
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AM_RANGE(0x8000, 0xffff) AM_RAM AM_SHARE("videoram") // c000..f7af?
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ADDRESS_MAP_END
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static ADDRESS_MAP_START( att4425_io, AS_IO, 8, att4425_state )
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AM_RANGE(0x0000, 0x0000) AM_MIRROR(0xff00) AM_DEVREADWRITE(I8251_TAG, i8251_device, data_r, data_w)
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AM_RANGE(0x0001, 0x0001) AM_MIRROR(0xff00) AM_DEVREADWRITE(I8251_TAG, i8251_device, status_r, control_w)
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AM_RANGE(0x0008, 0x0008) AM_MIRROR(0xff00) AM_UNMAP // write 08
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AM_RANGE(0x0010, 0x0010) AM_MIRROR(0xff00) AM_UNMAP // write 10
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AM_RANGE(0x0014, 0x0015) AM_MIRROR(0xff00) AM_UNMAP // NVRAM? read 14, 15; write 14
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AM_RANGE(0x0018, 0x001b) AM_MIRROR(0xff00) AM_DEVREADWRITE(Z80CTC_TAG, z80ctc_device, read, write)
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AM_RANGE(0x001c, 0x001f) AM_MIRROR(0xff00) AM_DEVREADWRITE(Z80SIO_TAG, z80sio_device, ba_cd_r, ba_cd_w)
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ADDRESS_MAP_END
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/* Input Ports */
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static INPUT_PORTS_START( att4425 )
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INPUT_PORTS_END
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/* Video */
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void att4425_state::video_start()
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{
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}
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uint32_t att4425_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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uint8_t y, ra, gfx, fg, bg, chr, attr;
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uint16_t sy = 0, ma, x, ca;
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fg = 2;
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bg = 0;
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for (y = 0; y < 27; y++)
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{
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ma = 0x7e9c + 4 * (81 - 27 + y);
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ma = (m_p_videoram[ma] << 8) + m_p_videoram[ma + 1] - 0x8000;
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for (ra = 0; ra < 13; ra++)
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{
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uint16_t *p = &bitmap.pix16(sy++);
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for (x = ma; x < ma + 160; x += 2)
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{
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chr = m_p_videoram[x + 1];
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attr = m_p_videoram[x];
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ca = (chr << 4) & 0x7f0;
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// font 2
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if (attr & 0x01)
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ca += 0x0800;
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// underline
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if (attr & 0x10 && ra == 12)
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gfx = 0xff;
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else
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gfx = m_p_chargen[ca | ra] ^ 255;
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// dim
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if (attr & 0x02)
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fg = 1;
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else
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fg = 2;
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// conceal
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if (attr & 0x04)
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fg = bg;
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// reverse video
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if (attr & 0x20)
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gfx ^= 255;
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/* Display a scanline of a character */
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*p++ = BIT(gfx, 7) ? fg : bg;
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*p++ = BIT(gfx, 6) ? fg : bg;
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*p++ = BIT(gfx, 5) ? fg : bg;
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*p++ = BIT(gfx, 4) ? fg : bg;
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*p++ = BIT(gfx, 3) ? fg : bg;
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*p++ = BIT(gfx, 2) ? fg : bg;
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*p++ = BIT(gfx, 1) ? fg : bg;
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*p++ = BIT(gfx, 0) ? fg : bg;
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*p++ = bg;
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}
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}
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ma += 160;
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}
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return 0;
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}
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static const gfx_layout att4425_charlayout =
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{
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8, 13,
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RGN_FRAC(1,1),
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1,
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{ 0 },
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{ STEP8(0,1) },
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{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, },
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16*8
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};
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static GFXDECODE_START( att4425 )
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GFXDECODE_ENTRY( "chargen", 0x0000, att4425_charlayout, 0, 1 )
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GFXDECODE_END
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/* Machine Initialization */
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void att4425_state::machine_start()
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{
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}
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/* Machine Driver */
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WRITE_LINE_MEMBER(att4425_state::write_line_clock)
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{
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m_sio->rxca_w(state);
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m_sio->txca_w(state);
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m_sio->rxtxcb_w(state);
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}
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WRITE_LINE_MEMBER(att4425_state::write_keyboard_clock)
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{
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m_i8251->write_txc(state);
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m_i8251->write_rxc(state);
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}
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static const z80_daisy_config att4425_daisy_chain[] =
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{
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// XXX order is unknown
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{ Z80SIO_TAG },
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{ Z80CTC_TAG },
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{ nullptr }
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};
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static MACHINE_CONFIG_START( att4425 )
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/* basic machine hardware */
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MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_32MHz/8) // XXX
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MCFG_CPU_PROGRAM_MAP(att4425_mem)
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MCFG_CPU_IO_MAP(att4425_io)
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MCFG_Z80_DAISY_CHAIN(att4425_daisy_chain)
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/* video hardware */
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MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::green())
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MCFG_SCREEN_REFRESH_RATE(50)
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MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
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MCFG_SCREEN_UPDATE_DRIVER(att4425_state, screen_update)
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MCFG_SCREEN_PALETTE("palette")
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MCFG_SCREEN_SIZE(720, 351)
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MCFG_SCREEN_VISIBLE_AREA(0, 720-1, 0, 351-1)
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MCFG_GFXDECODE_ADD("gfxdecode", "palette", att4425)
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MCFG_PALETTE_ADD_MONOCHROME_HIGHLIGHT("palette")
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// ch.3 -- timer?
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MCFG_DEVICE_ADD(Z80CTC_TAG, Z80CTC, XTAL_32MHz) // XXX
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MCFG_Z80CTC_INTR_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0))
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#ifdef notdef
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MCFG_Z80CTC_ZC0_CB(DEVWRITELINE(Z80SIO_TAG, z80sio_device, rxca_w))
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MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE(Z80SIO_TAG, z80sio_device, txca_w))
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MCFG_Z80CTC_ZC2_CB(DEVWRITELINE(Z80SIO_TAG, z80sio_device, rxtxcb_w))
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#endif
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MCFG_Z80SIO_ADD(Z80SIO_TAG, 4800, 0, 0, 0, 0) // XXX
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MCFG_Z80SIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0))
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MCFG_Z80SIO_OUT_TXDA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_txd))
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MCFG_Z80SIO_OUT_DTRA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_dtr))
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MCFG_Z80SIO_OUT_RTSA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_rts))
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MCFG_Z80SIO_OUT_TXDB_CB(DEVWRITELINE(RS232_B_TAG, rs232_port_device, write_txd))
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// host
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MCFG_RS232_PORT_ADD(RS232_A_TAG, default_rs232_devices, "null_modem")
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MCFG_RS232_RXD_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80sio_device, rxa_w))
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MCFG_RS232_DCD_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80sio_device, dcda_w))
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MCFG_RS232_CTS_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80sio_device, ctsa_w))
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// aux printer?
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MCFG_RS232_PORT_ADD(RS232_B_TAG, default_rs232_devices, "printer")
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MCFG_RS232_RXD_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80sio_device, rxb_w))
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// XXX
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MCFG_DEVICE_ADD("line_clock", CLOCK, 9600*64)
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MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(att4425_state, write_line_clock))
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MCFG_DEVICE_ADD(I8251_TAG, I8251, 0)
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MCFG_I8251_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd))
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MCFG_I8251_DTR_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_dtr))
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MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
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MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "keyboard")
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MCFG_RS232_RXD_HANDLER(DEVWRITELINE(I8251_TAG, i8251_device, write_rxd))
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MCFG_RS232_CTS_HANDLER(DEVWRITELINE(I8251_TAG, i8251_device, write_cts))
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MCFG_RS232_DSR_HANDLER(DEVWRITELINE(I8251_TAG, i8251_device, write_dsr))
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// XXX
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MCFG_DEVICE_ADD("keyboard_clock", CLOCK, 4800*64)
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MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(att4425_state, write_keyboard_clock))
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MCFG_RAM_ADD(RAM_TAG)
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MCFG_RAM_DEFAULT_SIZE("32K")
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MCFG_RAM_DEFAULT_VALUE(0)
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MACHINE_CONFIG_END
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/* ROMs */
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ROM_START( att4425 )
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ROM_REGION( 0x8000, Z80_TAG, 0 )
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ROM_LOAD( "455773-1.bin", 0x0000, 0x2000, CRC(d216515b) SHA1(6e098c35f8fe6be4f28a577a43145c92972041b1) )
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ROM_LOAD( "455774-1.bin", 0x2000, 0x2000, CRC(636c069a) SHA1(c00648eae44c574b983de6a0ba6cf74a7f07b098) )
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ROM_LOAD( "456305-1.bin", 0x4000, 0x2000, CRC(43cbf638) SHA1(939569e65957370ab8e60d4f90179373b72b9573) )
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ROM_LOAD( "456306-1.bin", 0x6000, 0x2000, CRC(e4f2b0f1) SHA1(c80c2b7219b313b4924834b0a9d1d42536d1ae63) )
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ROM_REGION( 0x2000, "chargen", 0 )
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ROM_LOAD( "char.bin", 0x0000, 0x2000, CRC(cca962cc) SHA1(201d97b954f782ceae8d17a08fb9a1c4d5ae7a58) )
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ROM_END
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/* System Drivers */
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// YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS
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COMP( 1983, att4425, 0, 0, att4425, att4425, att4425_state, 0, "AT&T", "AT&T Teletype 4425", MACHINE_IS_SKELETON )
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@ -2543,6 +2543,9 @@ shpinxii // Sphinx II
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splmastr // Spell Master
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splmastr // Spell Master
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tajmah // Tajmahal
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tajmah // Tajmahal
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@source:att4425.cpp
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att4425 //
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@source:attache.cpp
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@source:attache.cpp
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attache //
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attache //
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@ -65,6 +65,7 @@ atarist.cpp
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atm.cpp
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atm.cpp
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atom.cpp
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atom.cpp
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atpci.cpp
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atpci.cpp
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att4425.cpp
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attache.cpp
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attache.cpp
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aussiebyte.cpp
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aussiebyte.cpp
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avigo.cpp
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avigo.cpp
|
||||||
|
|||||||
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Reference in New Issue
Block a user