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https://github.com/holub/mame
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AT&T Blit terminal (skeleton) (#7469)
New machines marked as NOT_WORKING ------------------ AT&T Blit
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@ -4355,6 +4355,7 @@ files {
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MAME_DIR .. "src/mame/drivers/bert.cpp",
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MAME_DIR .. "src/mame/drivers/besta.cpp",
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MAME_DIR .. "src/mame/drivers/bitgraph.cpp",
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MAME_DIR .. "src/mame/drivers/blit.cpp",
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MAME_DIR .. "src/mame/drivers/bpmmicro.cpp",
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MAME_DIR .. "src/mame/drivers/blw700i.cpp",
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MAME_DIR .. "src/mame/drivers/br8641.cpp",
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291
src/mame/drivers/blit.cpp
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291
src/mame/drivers/blit.cpp
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@ -0,0 +1,291 @@
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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 Blit -- monochrome, raster graphics (800x1024), serial terminal.
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https://code.9front.org/hg/plan9front/file/f4fa0b9d0397/sys/src/games/blit/mmap
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memory map
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https://pbs.twimg.com/media/C_uxVGgUwAAImk6.jpg:orig
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board photo
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Onboard hardware (common to all revisions) is
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- 24K ROM
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- 256K RAM (includes frame buffer)
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- 2 serial ports, each driven by 6850 ACIA
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To do:
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- keyboard
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- mouse
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- make 'mux' window system work -- "68ld: load protocol failed"
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- sound?
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- what do dip switches do?
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****************************************************************************/
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#include "emu.h"
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#include "bus/rs232/rs232.h"
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#include "cpu/m68000/m68000.h"
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#include "machine/6850acia.h"
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#include "machine/clock.h"
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#include "machine/ram.h"
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#include "emupal.h"
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#include "screen.h"
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#include "speaker.h"
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#define M68K_TAG "maincpu"
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#define ACIA0_TAG "acia0"
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#define ACIA1_TAG "acia1"
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#define RS232_H_TAG "host"
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#define RS232_K_TAG "keyboard"
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//#define LOG_GENERAL (1U << 0) //defined in logmacro.h already
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#define LOG_PIA (1U << 1)
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#define LOG_DEBUG (1U << 2)
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//#define VERBOSE (LOG_DEBUG)
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//#define LOG_OUTPUT_FUNC printf
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#include "logmacro.h"
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#define LOGPIA(...) LOGMASKED(LOG_PIA, __VA_ARGS__)
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#define LOGDBG(...) LOGMASKED(LOG_DEBUG, __VA_ARGS__)
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class blit_state : public driver_device
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{
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public:
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blit_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, M68K_TAG)
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, m_ram(*this, RAM_TAG)
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, m_acia0(*this, ACIA0_TAG)
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, m_acia1(*this, ACIA1_TAG)
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, m_screen(*this, "screen")
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, m_misccr(*this, "misccr")
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, m_p_ram(*this, "p_ram")
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, m_sysrom(*this, M68K_TAG)
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{ }
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DECLARE_WRITE_LINE_MEMBER(system_clock_write);
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void start_write(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
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void vblank_ack(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
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uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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void blit(machine_config &config);
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void blit_mem(address_map &map);
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protected:
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virtual void machine_start() override;
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virtual void machine_reset() override;
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private:
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required_device<cpu_device> m_maincpu;
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required_device<ram_device> m_ram;
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required_device<acia6850_device> m_acia0;
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required_device<acia6850_device> m_acia1;
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required_device<screen_device> m_screen;
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required_shared_ptr<uint16_t> m_misccr;
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required_shared_ptr<uint16_t> m_p_ram;
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required_region_ptr<uint16_t> m_sysrom;
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memory_passthrough_handler *m_rom_shadow_tap;
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int m_videostart = 0;
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};
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void blit_state::blit_mem(address_map &map)
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{
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map.unmap_value_high();
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map(0x000000, 0x03ffff).ram().share("p_ram");
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map(0x040000, 0x045fff).rom().region(M68K_TAG, 0);
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// octal 0000, 0002 - 16-bit
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// map(0x060000, 0x060003).r(FUNC(blit_state::mouse_xy));
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// octal 0011, 0013 - 8-bit - host
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map(0x060008, 0x060009).rw(m_acia0, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
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map(0x06000a, 0x06000b).rw(m_acia0, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w));
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// octal 0021 - 8-bit
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// map(0x060010, 0x060011).r(FUNC(blit_state::mouse_buttons)).mask(0x00ff);
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// octal 0025 - mirror
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// map(0x060014, 0x060015).r(FUNC(blit_state::mouse_buttons)).mask(0x00ff);
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// octal 0027 - ???
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// octal 0030 - 16-bit
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map(0x060018, 0x060019).w(FUNC(blit_state::start_write));
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// octal 0040 - 16-bit
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map(0x060020, 0x060029).ram().share("misccr");
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// octal 0050 - 16-bit
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// map(0x060028, 0x060029).w(FUNC(blit_state::init_write));
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// octal 0060, 0062 - 8-bit - keyboard
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map(0x060030, 0x060031).rw(m_acia1, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
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map(0x060032, 0x060033).rw(m_acia1, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w));
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// octal 0070 - 16-bit
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map(0x060038, 0x060039).w(FUNC(blit_state::vblank_ack));
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}
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static INPUT_PORTS_START(blit)
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INPUT_PORTS_END
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static DEVICE_INPUT_DEFAULTS_START( host_rs232_defaults )
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DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_19200 )
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DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_19200 )
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DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 )
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DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 )
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DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE )
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DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_2 )
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DEVICE_INPUT_DEFAULTS( "FLOW_CONTROL", 0x01, 0x01 )
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DEVICE_INPUT_DEFAULTS_END
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static DEVICE_INPUT_DEFAULTS_START( kbd_rs232_defaults )
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DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_19200 )
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DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_19200 )
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DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 )
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DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 )
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DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE )
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DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_2 )
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DEVICE_INPUT_DEFAULTS( "FLOW_CONTROL", 0x01, 0x01 )
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DEVICE_INPUT_DEFAULTS_END
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void blit_state::start_write(offs_t offset, uint16_t data, uint16_t mem_mask)
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{
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LOG("START <- %04X (addr %06X)\n", data, data << 2);
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m_videostart = data << 1;
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}
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WRITE_LINE_MEMBER(blit_state::system_clock_write)
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{
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m_acia0->write_txc(state);
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m_acia0->write_rxc(state);
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//
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m_acia1->write_txc(state);
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m_acia1->write_rxc(state);
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}
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void blit_state::vblank_ack(offs_t offset, uint16_t data, uint16_t mem_mask)
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{
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m_maincpu->set_input_line(M68K_IRQ_1, CLEAR_LINE);
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}
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uint32_t blit_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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int fg, bg;
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if (BIT(*m_misccr, 0))
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{
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fg = 0; bg = 1;
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}
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else
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{
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fg = 1; bg = 0;
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}
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for (int y = 0; y < 1024; y++)
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{
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uint16_t *p = &bitmap.pix(y);
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for (int x = 0; x < 800 / 16; x += 1)
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{
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uint16_t gfx;
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gfx = m_p_ram[m_videostart + x + y * 50];
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for (int z = 15; z >= 0; z--)
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{
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*p++ = BIT(gfx, z) ? fg : bg;
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}
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}
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}
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return 0;
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}
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void blit_state::machine_start()
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{
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}
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void blit_state::machine_reset()
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{
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address_space &program = m_maincpu->space(AS_PROGRAM);
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program.install_rom(0x000000, 0x000007, m_sysrom); // do it here for F3
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m_rom_shadow_tap = program.install_read_tap(0x040000, 0x045fff, "rom_shadow_r",[this](offs_t offset, u16 &data, u16 mem_mask)
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{
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if (!machine().side_effects_disabled())
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{
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// delete this tap
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m_rom_shadow_tap->remove();
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// reinstall ram over the rom shadow
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m_maincpu->space(AS_PROGRAM).install_ram(0x000000, 0x000007, m_p_ram);
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}
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// return the original data
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return data;
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});
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*m_misccr = 0;
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}
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void blit_state::blit(machine_config &config)
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{
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M68000(config, m_maincpu, XTAL(33'000'000) / 4); // maybe XTAL(32'760'000)
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m_maincpu->set_addrmap(AS_PROGRAM, &blit_state::blit_mem);
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SCREEN(config, m_screen, SCREEN_TYPE_LCD, rgb_t::white());
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m_screen->set_refresh_hz(60);
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m_screen->set_size(800, 1024);
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m_screen->set_visarea(0, 800-1, 0, 1024-1);
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m_screen->set_screen_update(FUNC(blit_state::screen_update));
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m_screen->screen_vblank().set_inputline(M68K_TAG, M68K_IRQ_1);
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m_screen->set_palette("palette");
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PALETTE(config, "palette", palette_device::MONOCHROME);
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CLOCK(config, "system_clock", 19200 * 16).signal_handler().set(FUNC(blit_state::system_clock_write));
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ACIA6850(config, m_acia0, 0);
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m_acia0->txd_handler().set(RS232_H_TAG, FUNC(rs232_port_device::write_txd));
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m_acia0->rts_handler().set(RS232_H_TAG, FUNC(rs232_port_device::write_rts));
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m_acia0->irq_handler().set_inputline(M68K_TAG, M68K_IRQ_5);
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rs232_port_device &rs232h(RS232_PORT(config, RS232_H_TAG, default_rs232_devices, "null_modem"));
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rs232h.rxd_handler().set(m_acia0, FUNC(acia6850_device::write_rxd));
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rs232h.dcd_handler().set(m_acia0, FUNC(acia6850_device::write_dcd));
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rs232h.cts_handler().set(m_acia0, FUNC(acia6850_device::write_cts));
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rs232h.set_option_device_input_defaults("null_modem", DEVICE_INPUT_DEFAULTS_NAME(host_rs232_defaults));
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ACIA6850(config, m_acia1, 0);
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m_acia1->txd_handler().set(RS232_K_TAG, FUNC(rs232_port_device::write_txd));
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m_acia1->rts_handler().set(RS232_K_TAG, FUNC(rs232_port_device::write_rts));
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m_acia1->irq_handler().set_inputline(M68K_TAG, M68K_IRQ_2);
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rs232_port_device &rs232k(RS232_PORT(config, RS232_K_TAG, default_rs232_devices, "keyboard"));
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rs232k.rxd_handler().set(m_acia1, FUNC(acia6850_device::write_rxd));
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rs232k.dcd_handler().set(m_acia1, FUNC(acia6850_device::write_dcd));
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rs232k.cts_handler().set(m_acia1, FUNC(acia6850_device::write_cts));
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rs232k.set_option_device_input_defaults("keyboard", DEVICE_INPUT_DEFAULTS_NAME(kbd_rs232_defaults));
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RAM(config, RAM_TAG).set_default_size("256K");
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}
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ROM_START( blit )
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ROM_REGION16_BE(0x6000, M68K_TAG, 0)
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ROM_DEFAULT_BIOS("blit")
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ROM_SYSTEM_BIOS(0, "blit", "blit ROM")
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ROMX_LOAD("rom0.bin", 0x0001, 0x1000, CRC(e1cea320) SHA1(ba71ccd794b3bb87af58e2ff3056fc6b6e03a167), ROM_BIOS(0)|ROM_SKIP(1))
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ROMX_LOAD("rom1.bin", 0x0000, 0x1000, CRC(b717fa64) SHA1(45fbc6029031cfa6f16c258c131916f56f7d8d38), ROM_BIOS(0)|ROM_SKIP(1))
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ROMX_LOAD("rom2.bin", 0x2001, 0x1000, CRC(8a80bf57) SHA1(0b21ef8657a03418f5333772312b163d9a8e4ba0), ROM_BIOS(0)|ROM_SKIP(1))
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ROMX_LOAD("rom3.bin", 0x2000, 0x1000, CRC(846b742c) SHA1(7d27970df6e0304f3b026fd350acffa5fd921a96), ROM_BIOS(0)|ROM_SKIP(1))
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ROMX_LOAD("rom4.bin", 0x4001, 0x08bf, CRC(2af93f8b) SHA1(1168cb341bfe2a5bc283281f6afe42837adb60f1), ROM_BIOS(0)|ROM_SKIP(1))
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ROMX_LOAD("rom5.bin", 0x4000, 0x08bf, CRC(d87f121f) SHA1(6e776ac29554b8a8bb332168c155bcc502c927b5), ROM_BIOS(0)|ROM_SKIP(1))
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ROM_END
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/* Driver */
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// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
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COMP( 1981, blit, 0, 0, blit, blit, blit_state, empty_init, "AT&T", "Blit", MACHINE_IS_SKELETON )
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@ -9309,6 +9309,9 @@ bladestl // GX797 (c) 1987
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bladestle // GX797 (c) 1987
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bladestll // GX797 (c) 1987
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@source:blit.cpp
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blit
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@source:blitz68k.cpp
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bankrob // (c) 1993 Entertainment Technology Corp.
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bankroba // (c) 1993 Entertainment Technology Corp.
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@ -121,6 +121,7 @@ binbug.cpp
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bitel.cpp
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bitgraph.cpp
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bk.cpp
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blit.cpp
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blw700i.cpp
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bmjr.cpp
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bml3.cpp
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