mirror of
https://github.com/holub/mame
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digilog320: Various improvements, boots to setup screen now
- Implement I186/Z80 communication - Hook up most devices - Render cursor and reverse
This commit is contained in:
Dirk Best
parent
7c70628506
commit
b2867126a3
@ -6,8 +6,6 @@
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Protocol analyzer
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Status: Skeleton
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Hardware:
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PCB 24-0710-02B:
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@ -42,13 +40,30 @@
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- XTAL 2.688 MHz
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- XTAL 3.6864 MHz
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TODO:
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- Keyboard
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- Finish floppy hookup
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- SCC interrupts
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- Unknown DUART inputs/outputs
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- RS232
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- RTC
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- Artwork with LEDs
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Notes:
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- Everything here guessed, no manuals available
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****************************************************************************/
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#include "emu.h"
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#include "cpu/i86/i186.h"
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#include "cpu/z80/z80.h"
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#include "machine/am9519.h"
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#include "machine/i8251.h"
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#include "machine/mc68681.h"
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#include "machine/wd_fdc.h"
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#include "machine/z80scc.h"
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#include "video/mc6845.h"
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#include "imagedev/floppy.h"
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#include "emupal.h"
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#include "screen.h"
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@ -67,8 +82,13 @@ public:
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: driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_subcpu(*this, "subcpu"),
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m_uic(*this, "uic"),
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m_crtc(*this, "crtc"),
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m_palette(*this, "palette"),
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m_duart(*this, "duart"),
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m_scc(*this, "scc%u", 0U),
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m_fdc(*this, "fdc"),
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m_floppy(*this, "fdc:0"),
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m_vram(*this, "vram"),
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m_chargen(*this, "chargen")
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{ }
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@ -82,8 +102,13 @@ protected:
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private:
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required_device<i80186_cpu_device> m_maincpu;
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required_device<z80_device> m_subcpu;
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required_device<am9519_device> m_uic;
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required_device<mc6845_device> m_crtc;
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required_device<palette_device> m_palette;
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required_device<scn2681_device> m_duart;
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required_device_array<scc8530_device, 2> m_scc;
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required_device<mb8877_device> m_fdc;
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required_device<floppy_connector> m_floppy;
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required_shared_ptr<uint16_t> m_vram;
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required_region_ptr<uint8_t> m_chargen;
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@ -93,6 +118,20 @@ private:
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void sub_io_map(address_map &map);
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MC6845_UPDATE_ROW(update_row);
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uint8_t fdc_r(offs_t offset);
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void fdc_w(offs_t offset, uint8_t data);
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void fdc_ctrl_w(uint8_t data);
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uint8_t subcpu_to_maincpu_r();
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void maincpu_to_subcpu_w(uint8_t data);
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uint8_t maincpu_to_subcpu_r();
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void subcpu_to_maincpu_w(uint8_t data);
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uint8_t maincpu_status_r();
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uint8_t m_subcpu_to_maincpu;
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uint8_t m_maincpu_to_subcpu;
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uint8_t m_maincpu_status;
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};
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@ -104,14 +143,19 @@ void digilog320_state::main_mem_map(address_map &map)
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{
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map(0x00000, 0x1ffff).ram();
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map(0x80000, 0x83fff).ram().share("vram");
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map(0x90000, 0x90fff).ram();
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map(0xa0000, 0xfffff).rom().region("maincpu", 0);
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}
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void digilog320_state::main_io_map(address_map &map)
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{
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map(0x080, 0x09f).rw("duart", FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask16(0x00ff);
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map(0x000, 0x003).rw("usart", FUNC(i8251_device::read), FUNC(i8251_device::write)).umask16(0x00ff);
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map(0x080, 0x09f).rw(m_duart, FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask16(0x00ff);
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map(0x100, 0x107).rw(FUNC(digilog320_state::fdc_r), FUNC(digilog320_state::fdc_w)).umask16(0x00ff);
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map(0x180, 0x180).w(m_crtc, FUNC(mc6845_device::address_w));
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map(0x182, 0x182).w(m_crtc, FUNC(mc6845_device::register_w));
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map(0x200, 0x200).w(FUNC(digilog320_state::fdc_ctrl_w));
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map(0x280, 0x280).rw(FUNC(digilog320_state::subcpu_to_maincpu_r), FUNC(digilog320_state::maincpu_to_subcpu_w));
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}
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void digilog320_state::sub_mem_map(address_map &map)
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@ -123,6 +167,12 @@ void digilog320_state::sub_mem_map(address_map &map)
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void digilog320_state::sub_io_map(address_map &map)
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{
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map.global_mask(0xff);
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map(0x00, 0x00).rw(m_uic, FUNC(am9519_device::data_r), FUNC(am9519_device::data_w));
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map(0x01, 0x01).rw(m_uic, FUNC(am9519_device::stat_r), FUNC(am9519_device::cmd_w));
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map(0x04, 0x07).rw(m_scc[0], FUNC(z80scc_device::dc_ab_r), FUNC(z80scc_device::dc_ab_w));
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map(0x08, 0x0b).rw(m_scc[1], FUNC(z80scc_device::dc_ab_r), FUNC(z80scc_device::dc_ab_w));
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map(0x10, 0x10).rw(FUNC(digilog320_state::maincpu_to_subcpu_r), FUNC(digilog320_state::subcpu_to_maincpu_w));
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map(0x11, 0x11).r(FUNC(digilog320_state::maincpu_status_r));
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}
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@ -138,6 +188,14 @@ MC6845_UPDATE_ROW( digilog320_state::update_row )
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{
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uint16_t const data = (m_vram[ma + x]);
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uint8_t gfx = m_chargen[((data & 0xff) << 4) | ra];
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uint8_t attr = data >> 8;
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if (x == cursor_x)
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gfx ^= 0xff;
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// maybe
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if (BIT(attr, 3))
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gfx ^= 0xff;
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// draw 8 pixels of the character
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for (int i = 0; i < 8; i++)
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@ -161,16 +219,109 @@ static GFXDECODE_START(chars)
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GFXDECODE_END
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//**************************************************************************
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// FLOPPY
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//**************************************************************************
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// either cpu too fast or fdc too slow, assume some waitstates to pass check
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uint8_t digilog320_state::fdc_r(offs_t offset)
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{
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m_maincpu->adjust_icount(-2);
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return m_fdc->read(offset);
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}
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void digilog320_state::fdc_w(offs_t offset, uint8_t data)
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{
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m_maincpu->adjust_icount(-2);
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m_fdc->write(offset, data);
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}
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void digilog320_state::fdc_ctrl_w(uint8_t data)
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{
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logerror("fdc_ctrl_w: %02x\n", data);
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floppy_image_device *floppy = m_floppy->get_device();
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m_fdc->set_floppy(floppy);
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// motor always on for now
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if (floppy)
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floppy->mon_w(0);
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// set to mfm
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m_fdc->dden_w(0);
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}
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static void digilog320_floppies(device_slot_interface &device)
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{
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device.option_add("35dd", FLOPPY_35_DD);
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}
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//**************************************************************************
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// MACHINE EMULATION
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//**************************************************************************
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uint8_t digilog320_state::subcpu_to_maincpu_r()
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{
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logerror("subcpu_to_maincpu_r: %02x\n", m_subcpu_to_maincpu);
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m_maincpu_status &= ~0x40;
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m_duart->ip3_w(0);
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return m_subcpu_to_maincpu;
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}
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void digilog320_state::maincpu_to_subcpu_w(uint8_t data)
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{
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logerror("maincpu_to_subcpu_w: %02x\n", data);
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m_maincpu_to_subcpu = data;
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m_duart->ip0_w(1);
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m_uic->ireq4_w(0);
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}
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uint8_t digilog320_state::maincpu_to_subcpu_r()
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{
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logerror("maincpu_to_subcpu_r: %02x\n", m_maincpu_to_subcpu);
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m_duart->ip0_w(0);
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m_uic->ireq4_w(1);
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return m_maincpu_to_subcpu;
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}
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void digilog320_state::subcpu_to_maincpu_w(uint8_t data)
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{
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logerror("subcpu_to_maincpu_w: %02x\n", data);
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m_subcpu_to_maincpu = data;
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m_maincpu_status |= 0x40;
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m_duart->ip3_w(1);
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}
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uint8_t digilog320_state::maincpu_status_r()
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{
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// 7------- unknown
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// -6------ maincpu ready to receive data (0 = ready)
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// --543210 unknown
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return m_maincpu_status;
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}
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void digilog320_state::machine_start()
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{
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// register for save states
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save_item(NAME(m_subcpu_to_maincpu));
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save_item(NAME(m_maincpu_to_subcpu));
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save_item(NAME(m_maincpu_status));
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}
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void digilog320_state::machine_reset()
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{
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m_maincpu_status = 0x00;
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}
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@ -187,6 +338,10 @@ void digilog320_state::digilog320(machine_config &config)
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Z80(config, m_subcpu, 16_MHz_XTAL / 2); // Z0840008PSC
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m_subcpu->set_addrmap(AS_PROGRAM, &digilog320_state::sub_mem_map);
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m_subcpu->set_addrmap(AS_IO, &digilog320_state::sub_io_map);
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m_subcpu->set_irq_acknowledge_callback(m_uic, FUNC(am9519_device::iack_cb));
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AM9519(config, m_uic, 0);
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m_uic->out_int_callback().set_inputline(m_subcpu, INPUT_LINE_IRQ0);
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screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
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screen.set_raw(5.6592_MHz_XTAL, 320, 0, 256, 262, 0, 192);
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@ -201,7 +356,19 @@ void digilog320_state::digilog320(machine_config &config)
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m_crtc->set_show_border_area(false);
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m_crtc->set_update_row_callback(FUNC(digilog320_state::update_row));
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SCN2681(config, "duart", 3.6864_MHz_XTAL);
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SCN2681(config, m_duart, 3.6864_MHz_XTAL);
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m_duart->irq_cb().set(m_maincpu, FUNC(i80186_cpu_device::int0_w));
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I8251(config, "usart", 0);
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SCC8530N(config, m_scc[0], 3.6864_MHz_XTAL);
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SCC8530N(config, m_scc[1], 3.6864_MHz_XTAL);
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MB8877(config, m_fdc, 16_MHz_XTAL / 16);
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m_fdc->intrq_wr_callback().set(m_maincpu, FUNC(i80186_cpu_device::int3_w));
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//m_fdc->drq_wr_callback()
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FLOPPY_CONNECTOR(config, "fdc:0", digilog320_floppies, "35dd", floppy_image_device::default_mfm_floppy_formats);
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}
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@ -234,4 +401,4 @@ 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( 1988, digilog320, 0, 0, digilog320, 0, digilog320_state, empty_init, "Digilog", "320", MACHINE_IS_SKELETON )
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COMP( 1988, digilog320, 0, 0, digilog320, 0, digilog320_state, empty_init, "Digilog", "320", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )
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