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dim68k: fix boot bankswitch, additional FDC & RS232 hookups, it now tries to boot a floppy [R. Belmont]

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This commit is contained in:
arbee 2021-01-06 23:14:37 -05:00
parent 29e96c84a8
commit 6812f06a95
1 changed files with 31 additions and 8 deletions
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39
src/mame/drivers/dim68k.cpp
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@ -23,6 +23,13 @@
- The plug-in boards
- Emulator trap function
DUART I/O port bits:
INPUT:
bit 0 = Centronics RDY
OUTPUT:
all bits = Centronics data
****************************************************************************/
#include "emu.h"
@ -32,6 +39,7 @@
#include "machine/upd765.h"
#include "sound/spkrdev.h"
#include "video/mc6845.h"
#include "bus/rs232/rs232.h"
#include "emupal.h"
#include "screen.h"
#include "softlist.h"
@ -45,6 +53,8 @@ public:
, m_maincpu(*this, "maincpu")
, m_crtc(*this, "crtc")
, m_speaker(*this, "speaker")
, m_fdc(*this, "fdc")
, m_floppy(*this, "fdc:%u", 0U)
, m_ram(*this, "ram")
, m_palette(*this, "palette")
, m_p_chargen(*this, "chargen")
@ -79,6 +89,8 @@ private:
required_device<cpu_device> m_maincpu;
required_device<mc6845_device> m_crtc;
required_device<speaker_sound_device> m_speaker;
required_device<upd765a_device> m_fdc;
required_device_array<floppy_connector, 2> m_floppy;
required_shared_ptr<uint16_t> m_ram;
required_device<palette_device> m_palette;
required_region_ptr<u8> m_p_chargen;
@ -115,6 +127,14 @@ void dim68k_state::dim68k_speaker_w(u16 data)
void dim68k_state::dim68k_fdc_w(u16 data)
{
if (BIT(data, 1))
{
m_floppy[BIT(data, 0)^1]->get_device()->mon_w(true);
}
else
{
m_floppy[BIT(data, 0)^1]->get_device()->mon_w(false);
}
}
void dim68k_state::dim68k_video_high_w(u16 data)
@ -205,7 +225,7 @@ void dim68k_state::mem_map(address_map &map)
map(0xffc400, 0xffc41f).rw(m_duart, FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask16(0x00ff);
map(0xffc800, 0xffc801).rw(FUNC(dim68k_state::dim68k_speaker_r), FUNC(dim68k_state::dim68k_speaker_w));
map(0xffcc00, 0xffcc1f).rw(FUNC(dim68k_state::dim68k_game_switches_r), FUNC(dim68k_state::dim68k_reset_timers_w));
map(0xffd000, 0xffd003).m("fdc", FUNC(upd765a_device::map)).umask16(0x00ff); // NEC uPD765A
map(0xffd000, 0xffd003).m(m_fdc, FUNC(upd765a_device::map)).umask16(0x00ff); // NEC uPD765A
map(0xffd004, 0xffd005).rw(FUNC(dim68k_state::dim68k_fdc_r), FUNC(dim68k_state::dim68k_fdc_w));
//map(0x00ffd400, 0x00ffd403) emulation trap control
map(0xffd800, 0xffd801).w(FUNC(dim68k_state::dim68k_printer_strobe_w));
@ -219,9 +239,7 @@ INPUT_PORTS_END
void dim68k_state::machine_reset()
{
u16* ROM = &memregion("bootrom")->as_u16();
memcpy((u16*)m_ram.target(), ROM, 0x2000);
m_bootview.select(0);
}
// Text-only; graphics isn't emulated yet. Need to find out if hardware cursor is used.
@ -296,7 +314,7 @@ GFXDECODE_END
static void dim68k_floppies(device_slot_interface &device)
{
device.option_add("525hd", FLOPPY_525_HD);
device.option_add("525dd", FLOPPY_525_DD);
}
void dim68k_state::machine_start()
@ -326,9 +344,9 @@ void dim68k_state::dim68k(machine_config &config)
SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.50);
/* Devices */
UPD765A(config, "fdc", 8'000'000, true, true); // these options unknown
FLOPPY_CONNECTOR(config, "fdc:0", dim68k_floppies, "525hd", floppy_image_device::default_floppy_formats);
FLOPPY_CONNECTOR(config, "fdc:1", dim68k_floppies, "525hd", floppy_image_device::default_floppy_formats);
UPD765A(config, m_fdc, 8'000'000, true, true); // these options unknown
FLOPPY_CONNECTOR(config, m_floppy[0], dim68k_floppies, "525dd", floppy_image_device::default_floppy_formats);
FLOPPY_CONNECTOR(config, m_floppy[1], dim68k_floppies, "525dd", floppy_image_device::default_floppy_formats);
MC6845(config, m_crtc, 1790000);
m_crtc->set_screen("screen");
@ -336,7 +354,12 @@ void dim68k_state::dim68k(machine_config &config)
m_crtc->set_char_width(8);
m_crtc->set_update_row_callback(FUNC(dim68k_state::crtc_update_row));
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, nullptr));
SCN2681(config, m_duart, 3.6864_MHz_XTAL);
m_duart->b_tx_cb().set(rs232, FUNC(rs232_port_device::write_txd));
rs232.rxd_handler().set(m_duart, FUNC(scn2681_device::rx_b_w));
// software lists
SOFTWARE_LIST(config, "flop_list").set_original("dim68k");