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dg640: Add base address select switch and screen raw parameters; improve documentation (nw)

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This commit is contained in:
AJR 2019-07-21 13:38:30 -04:00
parent 65054fc4f1
commit f53b9b5291
4 changed files with 71 additions and 24 deletions
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66
src/devices/bus/s100/dg640.cpp
View File

@ -2,11 +2,12 @@
// copyright-holders:Robbbert
/***************************************************************************
David Griffiths DG640 board.
David Griffiths DG640 Video Display Unit.
It was sold by Applied Technology. It uses a MCM6574 as a character generator.
The DG640 also supports blinking, reverse-video, and LORES graphics.
It is a S100 card, also known as ETI-640.
It is a S100 card, originally called "ETI 640" when it was first described
in the April 1978 issue of Electronics Today International (Australia).
****************************************************************************/
@ -18,12 +19,13 @@ It is a S100 card, also known as ETI-640.
DEFINE_DEVICE_TYPE_PRIVATE(S100_DG640, device_s100_card_interface, dg640_device, "dg640", "S100_DG640")
DEFINE_DEVICE_TYPE(S100_DG640, dg640_device, "dg640", "DG640 VDU")
dg640_device::dg640_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, S100_DG640, tag, owner, clock)
, device_s100_card_interface(mconfig, *this)
, m_p_chargen(*this, "chargen")
, m_dsw(*this, "DSW")
{}
void dg640_device::device_start()
@ -112,7 +114,10 @@ uint32_t dg640_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap
u8 dg640_device::s100_smemr_r(offs_t offset)
{
if ((offset & 0xfc00) == 0)
if (m_dsw->read() != (offset & 0xf800) >> 11)
return 0xff;
if ((offset & 0x400) == 0)
return m_p_videoram[offset & 0x3ff];
else
return m_p_attribram[offset & 0x3ff];
@ -120,13 +125,59 @@ u8 dg640_device::s100_smemr_r(offs_t offset)
void dg640_device::s100_mwrt_w(offs_t offset, u8 data)
{
if ((offset & 0xfc00) == 0)
if (m_dsw->read() != (offset & 0xf800) >> 11)
return;
if ((offset & 0x400) == 0)
m_p_videoram[offset & 0x3ff] = data;
else
m_p_attribram[offset & 0x3ff] = data;
}
static INPUT_PORTS_START(dg640)
PORT_START("DSW")
PORT_DIPNAME(0x1f, 0x0f, "Base Address") PORT_DIPLOCATION("SW1:1,2,3,4,5")
PORT_DIPSETTING(0x00, "0000")
PORT_DIPSETTING(0x01, "0800")
PORT_DIPSETTING(0x02, "1000")
PORT_DIPSETTING(0x03, "1800")
PORT_DIPSETTING(0x04, "2000")
PORT_DIPSETTING(0x05, "2800")
PORT_DIPSETTING(0x06, "3000")
PORT_DIPSETTING(0x07, "3800")
PORT_DIPSETTING(0x08, "4000")
PORT_DIPSETTING(0x09, "4800")
PORT_DIPSETTING(0x0a, "5000")
PORT_DIPSETTING(0x0b, "5800")
PORT_DIPSETTING(0x0c, "6000")
PORT_DIPSETTING(0x0d, "6800")
PORT_DIPSETTING(0x0e, "7000")
PORT_DIPSETTING(0x0f, "7800")
PORT_DIPSETTING(0x10, "8000")
PORT_DIPSETTING(0x11, "8800")
PORT_DIPSETTING(0x12, "9000")
PORT_DIPSETTING(0x13, "9800")
PORT_DIPSETTING(0x14, "A000")
PORT_DIPSETTING(0x15, "A800")
PORT_DIPSETTING(0x16, "B000")
PORT_DIPSETTING(0x17, "B800")
PORT_DIPSETTING(0x18, "C000")
PORT_DIPSETTING(0x19, "C800")
PORT_DIPSETTING(0x1a, "D000")
PORT_DIPSETTING(0x1b, "D800")
PORT_DIPSETTING(0x1c, "E000")
PORT_DIPSETTING(0x1d, "E800")
PORT_DIPSETTING(0x1e, "F000")
PORT_DIPSETTING(0x1f, "F800")
INPUT_PORTS_END
ioport_constructor dg640_device::device_input_ports() const
{
return INPUT_PORTS_NAME(dg640);
}
/* F4 Character Displayer */
static const gfx_layout dg640_charlayout =
{
@ -149,11 +200,8 @@ void dg640_device::device_add_mconfig(machine_config &config)
{
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_color(rgb_t::amber());
screen.set_refresh_hz(50);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
screen.set_raw(12_MHz_XTAL, 768, 0, 512, 312, 0, 256); // 15625 Hz horizontal
screen.set_screen_update(FUNC(dg640_device::screen_update));
screen.set_size(512, 256);
screen.set_visarea(0, 511, 0, 255);
screen.set_palette("palette");
GFXDECODE(config, "gfxdecode", "palette", gfx_dg640);

4
src/devices/bus/s100/dg640.h
View File

@ -22,6 +22,7 @@ public:
protected:
// device-level overrides
virtual void device_start() override;
virtual ioport_constructor device_input_ports() const override;
virtual void device_add_mconfig(machine_config &config) override;
virtual const tiny_rom_entry *device_rom_region() const override;
@ -34,6 +35,7 @@ private:
// object finders
required_region_ptr<u8> m_p_chargen;
required_ioport m_dsw;
// internal state
std::unique_ptr<u8[]> m_p_videoram;
@ -42,6 +44,6 @@ private:
};
DECLARE_DEVICE_TYPE(S100_DG640, device_s100_card_interface)
DECLARE_DEVICE_TYPE(S100_DG640, dg640_device)
#endif // MAME_BUS_S100_DG640_H

4
src/mame/drivers/binbug.cpp
View File

@ -144,12 +144,12 @@ WRITE_LINE_MEMBER( binbug_state::binbug_serial_w )
READ8_MEMBER( binbug_state::mem_r )
{
return m_s100->smemr_r(offset);
return m_s100->smemr_r(offset + 0x7800);
}
WRITE8_MEMBER( binbug_state::mem_w )
{
m_s100->mwrt_w(offset, data);
m_s100->mwrt_w(offset + 0x7800, data);
}
void binbug_state::binbug_mem(address_map &map)

21
src/mame/drivers/dg680.cpp
View File

@ -168,12 +168,12 @@ TIMER_DEVICE_CALLBACK_MEMBER( dg680_state::kansas_r )
READ8_MEMBER( dg680_state::mem_r )
{
return m_s100->smemr_r(offset);
return m_s100->smemr_r(offset + 0xf000);
}
WRITE8_MEMBER( dg680_state::mem_w )
{
m_s100->mwrt_w(offset, data);
m_s100->mwrt_w(offset + 0xf000, data);
}
@ -183,7 +183,7 @@ void dg680_state::dg680_mem(address_map &map)
map(0x0000, 0xcfff).ram();
map(0xd000, 0xd7ff).rom();
map(0xd800, 0xefff).ram();
map(0xf000, 0xf7ff).rw(FUNC(dg680_state::mem_r),FUNC(dg680_state::mem_w));
map(0xf000, 0xffff).rw(FUNC(dg680_state::mem_r),FUNC(dg680_state::mem_w));
}
void dg680_state::dg680_io(address_map &map)
@ -261,19 +261,15 @@ WRITE8_MEMBER( dg680_state::port08_w )
}
static DEVICE_INPUT_DEFAULTS_START( keyboard )
DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_300 )
DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 )
DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 )
DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE )
DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 )
DEVICE_INPUT_DEFAULTS_END
static void dg680_s100_devices(device_slot_interface &device)
{
device.option_add("dg640", S100_DG640);
}
DEVICE_INPUT_DEFAULTS_START(dg680_dg640_f000)
DEVICE_INPUT_DEFAULTS("DSW", 0x1f, 0x1e) // F000-F7FF
DEVICE_INPUT_DEFAULTS_END
void dg680_state::dg680(machine_config &config)
{
SPEAKER(config, "mono").front_center();
@ -313,7 +309,8 @@ void dg680_state::dg680(machine_config &config)
m_pio->out_pb_callback().set(FUNC(dg680_state::portb_w));
S100_BUS(config, m_s100, 1_MHz_XTAL);
S100_SLOT(config, "s100:1", dg680_s100_devices, "dg640");
S100_SLOT(config, "s100:1", dg680_s100_devices, "dg640")
.set_option_device_input_defaults("dg640", DEVICE_INPUT_DEFAULTS_NAME(dg680_dg640_f000));
}
/* ROM definition */