summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/unixpc.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/drivers/unixpc.cpp')
-rw-r--r--src/mame/drivers/unixpc.cpp235
1 files changed, 235 insertions, 0 deletions
diff --git a/src/mame/drivers/unixpc.cpp b/src/mame/drivers/unixpc.cpp
new file mode 100644
index 00000000000..0372d6493d2
--- /dev/null
+++ b/src/mame/drivers/unixpc.cpp
@@ -0,0 +1,235 @@
+// license:GPL-2.0+
+// copyright-holders:Dirk Best
+/***************************************************************************
+
+ AT&T Unix PC series
+
+ Skeleton driver
+
+ Note: The 68k core needs restartable instruction support for this
+ to have a chance to run.
+
+***************************************************************************/
+
+
+#include "emu.h"
+#include "cpu/m68000/m68000.h"
+#include "machine/ram.h"
+#include "machine/wd_fdc.h"
+#include "unixpc.lh"
+
+
+/***************************************************************************
+ DRIVER STATE
+***************************************************************************/
+
+class unixpc_state : public driver_device
+{
+public:
+ unixpc_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_maincpu(*this, "maincpu"),
+ m_ram(*this, RAM_TAG),
+ m_wd2797(*this, "wd2797"),
+ m_floppy(*this, "wd2797:0:525dd"),
+ m_mapram(*this, "mapram"),
+ m_videoram(*this, "videoram"){ }
+
+ required_device<cpu_device> m_maincpu;
+ required_device<ram_device> m_ram;
+ required_device<wd2797_t> m_wd2797;
+ required_device<floppy_image_device> m_floppy;
+
+ UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+
+ virtual void machine_reset();
+
+ DECLARE_READ16_MEMBER( line_printer_r );
+ DECLARE_WRITE16_MEMBER( misc_control_w );
+ DECLARE_WRITE16_MEMBER( disk_control_w );
+ DECLARE_WRITE16_MEMBER( romlmap_w );
+
+ DECLARE_WRITE_LINE_MEMBER( wd2797_intrq_w );
+ DECLARE_WRITE_LINE_MEMBER( wd2797_drq_w );
+
+ required_shared_ptr<UINT16> m_mapram;
+ required_shared_ptr<UINT16> m_videoram;
+};
+
+
+/***************************************************************************
+ MEMORY
+***************************************************************************/
+
+WRITE16_MEMBER( unixpc_state::romlmap_w )
+{
+ if (BIT(data, 15))
+ space.install_ram(0x000000, 0x3fffff, m_ram->pointer());
+ else
+ space.install_rom(0x000000, 0x3fffff, memregion("bootrom")->base());
+}
+
+void unixpc_state::machine_reset()
+{
+ address_space &program = m_maincpu->space(AS_PROGRAM);
+
+ // force ROM into lower mem on reset
+ romlmap_w(program, 0, 0, 0xffff);
+
+ // reset cpu so that it can pickup the new values
+ m_maincpu->reset();
+}
+
+
+/***************************************************************************
+ MISC
+***************************************************************************/
+
+READ16_MEMBER( unixpc_state::line_printer_r )
+{
+ UINT16 data = 0;
+
+ data |= 1; // no dial tone detected
+ data |= 1 << 1; // no parity error
+ data |= 0 << 2; // hdc intrq
+ data |= m_wd2797->intrq_r() << 3;
+
+ logerror("line_printer_r: %04x\n", data);
+
+ return data;
+}
+
+WRITE16_MEMBER( unixpc_state::misc_control_w )
+{
+ logerror("misc_control_w: %04x\n", data);
+
+ output_set_value("led_0", !BIT(data, 8));
+ output_set_value("led_1", !BIT(data, 9));
+ output_set_value("led_2", !BIT(data, 10));
+ output_set_value("led_3", !BIT(data, 11));
+}
+
+
+/***************************************************************************
+ FLOPPY
+***************************************************************************/
+
+WRITE16_MEMBER( unixpc_state::disk_control_w )
+{
+ logerror("disk_control_w: %04x\n", data);
+
+ m_floppy->mon_w(!BIT(data, 5));
+
+ // bit 6 = floppy selected / not selected
+ if (BIT(data, 6))
+ m_wd2797->set_floppy(m_floppy);
+ else
+ m_wd2797->set_floppy(NULL);
+}
+
+WRITE_LINE_MEMBER( unixpc_state::wd2797_intrq_w )
+{
+ logerror("wd2797_intrq_w: %d\n", state);
+}
+
+WRITE_LINE_MEMBER( unixpc_state::wd2797_drq_w )
+{
+ logerror("wd2797_drq_w: %d\n", state);
+}
+
+
+/***************************************************************************
+ VIDEO
+***************************************************************************/
+
+UINT32 unixpc_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ for (int y = 0; y < 348; y++)
+ for (int x = 0; x < 720/16; x++)
+ for (int b = 0; b < 16; b++)
+ bitmap.pix16(y, x * 16 + b) = BIT(m_videoram[y * (720/16) + x], b);
+
+ return 0;
+}
+
+
+/***************************************************************************
+ ADDRESS MAPS
+***************************************************************************/
+
+static ADDRESS_MAP_START( unixpc_mem, AS_PROGRAM, 16, unixpc_state )
+ AM_RANGE(0x000000, 0x3fffff) AM_RAMBANK("bank1")
+ AM_RANGE(0x400000, 0x4007ff) AM_RAM AM_SHARE("mapram")
+ AM_RANGE(0x420000, 0x427fff) AM_RAM AM_SHARE("videoram")
+ AM_RANGE(0x470000, 0x470001) AM_READ(line_printer_r)
+ AM_RANGE(0x4a0000, 0x4a0001) AM_WRITE(misc_control_w)
+ AM_RANGE(0x4e0000, 0x4e0001) AM_WRITE(disk_control_w)
+ AM_RANGE(0x800000, 0xbfffff) AM_MIRROR(0x7fc000) AM_ROM AM_REGION("bootrom", 0)
+ AM_RANGE(0xe10000, 0xe10007) AM_DEVREADWRITE8("wd2797", wd_fdc_t, read, write, 0x00ff)
+ AM_RANGE(0xe43000, 0xe43001) AM_WRITE(romlmap_w)
+ADDRESS_MAP_END
+
+
+/***************************************************************************
+ INPUT PORTS
+***************************************************************************/
+
+static INPUT_PORTS_START( unixpc )
+INPUT_PORTS_END
+
+
+/***************************************************************************
+ MACHINE DRIVERS
+***************************************************************************/
+
+static SLOT_INTERFACE_START( unixpc_floppies )
+ SLOT_INTERFACE( "525dd", FLOPPY_525_DD )
+SLOT_INTERFACE_END
+
+static MACHINE_CONFIG_START( unixpc, unixpc_state )
+ // basic machine hardware
+ MCFG_CPU_ADD("maincpu", M68010, XTAL_10MHz)
+ MCFG_CPU_PROGRAM_MAP(unixpc_mem)
+
+ // video hardware
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_UPDATE_DRIVER(unixpc_state, screen_update)
+ MCFG_SCREEN_RAW_PARAMS(XTAL_20MHz, 896, 0, 720, 367, 0, 348)
+ MCFG_SCREEN_PALETTE("palette")
+ // vsync should actually last 17264 pixels
+
+ MCFG_DEFAULT_LAYOUT(layout_unixpc)
+
+ MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
+
+ // internal ram
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("1M")
+ MCFG_RAM_EXTRA_OPTIONS("2M")
+
+ // floppy
+ MCFG_DEVICE_ADD("wd2797", WD2797, 1000000)
+ MCFG_WD_FDC_INTRQ_CALLBACK(WRITELINE(unixpc_state, wd2797_intrq_w))
+ MCFG_WD_FDC_DRQ_CALLBACK(WRITELINE(unixpc_state, wd2797_drq_w))
+ MCFG_FLOPPY_DRIVE_ADD("wd2797:0", unixpc_floppies, "525dd", floppy_image_device::default_floppy_formats)
+MACHINE_CONFIG_END
+
+
+/***************************************************************************
+ ROM DEFINITIONS
+***************************************************************************/
+
+// ROMs were provided by Michael Lee und imaged by Philip Pemberton
+ROM_START( 3b1 )
+ ROM_REGION16_BE(0x400000, "bootrom", 0)
+ ROM_LOAD16_BYTE("72-00617.15c", 0x000000, 0x002000, CRC(4e93ff40) SHA1(1a97c8d32ec862f7f5fa1032f1688b76ea0672cc))
+ ROM_LOAD16_BYTE("72-00616.14c", 0x000001, 0x002000, CRC(c61f7ae0) SHA1(ab3ac29935a2a587a083c4d175a5376badd39058))
+ROM_END
+
+
+/***************************************************************************
+ GAME DRIVERS
+***************************************************************************/
+
+// YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS
+COMP( 1985, 3b1, 0, 0, unixpc, unixpc, driver_device, 0, "AT&T", "3B1", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )