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Diffstat (limited to 'src/mame/drivers/ht68k.cpp')
-rw-r--r-- | src/mame/drivers/ht68k.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/mame/drivers/ht68k.cpp b/src/mame/drivers/ht68k.cpp new file mode 100644 index 00000000000..155e3865621 --- /dev/null +++ b/src/mame/drivers/ht68k.cpp @@ -0,0 +1,161 @@ +// license:BSD-3-Clause +// copyright-holders:Miodrag Milanovic +/*************************************************************************** + + Hawthorne Technology TinyGiant HT68k + + 29/11/2009 Skeleton driver. + +Monitor commands (from ht68k manual) (must be in Uppercase) +B Load binary file from disk. +C Compare memory. +D Display memory in Hex and ASCII. +E Examine and/or change memory (2 bytes). (. to escape) +F Fill a block of memory with a value. +G Go to an address and execute program. +K Peek. +L Load program from serial port. +M Move memory. +P Poke. +R Read binary file from disk. +S System boot. +T Test printer. +W Write binary file to disk. +X Examine long and/or change memory (4 bytes). (. to escape) + + +Lot of infos available at: http://www.classiccmp.org/cini/ht68k.htm + +****************************************************************************/ + +#include "bus/rs232/rs232.h" +#include "cpu/m68000/m68000.h" +#include "machine/mc68681.h" +#include "machine/wd_fdc.h" +#include "softlist.h" + +class ht68k_state : public driver_device +{ +public: + ht68k_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_duart(*this, "duart68681"), + m_fdc(*this, "wd1770"), + m_floppy0(*this, "wd1770:0"), + m_floppy1(*this, "wd1770:1"), + m_floppy2(*this, "wd1770:2"), + m_floppy3(*this, "wd1770:3"), + m_floppy(NULL), + m_p_ram(*this, "p_ram") + { + } + + required_device<cpu_device> m_maincpu; + required_device<mc68681_device> m_duart; + required_device<wd1770_t> m_fdc; + required_device<floppy_connector> m_floppy0; + required_device<floppy_connector> m_floppy1; + required_device<floppy_connector> m_floppy2; + required_device<floppy_connector> m_floppy3; + floppy_image_device *m_floppy; + DECLARE_WRITE_LINE_MEMBER(duart_irq_handler); + DECLARE_WRITE_LINE_MEMBER(duart_txb); + DECLARE_WRITE8_MEMBER(duart_output); + required_shared_ptr<UINT16> m_p_ram; + virtual void machine_reset(); +}; + + +static ADDRESS_MAP_START(ht68k_mem, AS_PROGRAM, 16, ht68k_state) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x00000000, 0x0007ffff) AM_RAM AM_SHARE("p_ram") // 512 KB RAM / ROM at boot + //AM_RANGE(0x00080000, 0x000fffff) // Expansion + //AM_RANGE(0x00d80000, 0x00d8ffff) // Printer + AM_RANGE(0x00e00000, 0x00e00007) AM_MIRROR(0xfff8) AM_DEVREADWRITE8("wd1770", wd1770_t, read, write, 0x00ff) // FDC WD1770 + AM_RANGE(0x00e80000, 0x00e800ff) AM_MIRROR(0xff00) AM_DEVREADWRITE8("duart68681", mc68681_device, read, write, 0xff ) + AM_RANGE(0x00f00000, 0x00f07fff) AM_ROM AM_MIRROR(0xf8000) AM_REGION("user1",0) +ADDRESS_MAP_END + +/* Input ports */ +static INPUT_PORTS_START( ht68k ) +INPUT_PORTS_END + +void ht68k_state::machine_reset() +{ + UINT8* user1 = memregion("user1")->base(); + + memcpy((UINT8*)m_p_ram.target(),user1,0x8000); + + m_maincpu->reset(); + + m_fdc->reset(); + m_fdc->set_floppy(NULL); +} + +WRITE_LINE_MEMBER(ht68k_state::duart_irq_handler) +{ + m_maincpu->set_input_line_and_vector(M68K_IRQ_3, state, M68K_INT_ACK_AUTOVECTOR); +} + +WRITE_LINE_MEMBER(ht68k_state::duart_txb) +{ + //This is the second serial channel named AUX, for modem or other serial devices. +} + +WRITE8_MEMBER(ht68k_state::duart_output) +{ + m_floppy = NULL; + + if ((BIT(data, 7)) == 0) { m_floppy = m_floppy0->get_device(); } + if ((BIT(data, 6)) == 0) { m_floppy = m_floppy1->get_device(); } + if ((BIT(data, 5)) == 0) { m_floppy = m_floppy2->get_device(); } + if ((BIT(data, 4)) == 0) { m_floppy = m_floppy3->get_device(); } + + m_fdc->set_floppy(m_floppy); + + if (m_floppy) {m_floppy->ss_w(BIT(data,3) ? 0 : 1);} +} + +static SLOT_INTERFACE_START( ht68k_floppies ) + SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) +SLOT_INTERFACE_END + + +static MACHINE_CONFIG_START( ht68k, ht68k_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu",M68000, XTAL_8MHz) + MCFG_CPU_PROGRAM_MAP(ht68k_mem) + + /* video hardware */ + MCFG_MC68681_ADD( "duart68681", XTAL_8MHz / 2 ) + MCFG_MC68681_SET_EXTERNAL_CLOCKS(500000, 500000, 1000000, 1000000) + MCFG_MC68681_IRQ_CALLBACK(WRITELINE(ht68k_state, duart_irq_handler)) + MCFG_MC68681_A_TX_CALLBACK(DEVWRITELINE("rs232", rs232_port_device, write_txd)) + MCFG_MC68681_B_TX_CALLBACK(WRITELINE(ht68k_state, duart_txb)) + MCFG_MC68681_OUTPORT_CALLBACK(WRITE8(ht68k_state, duart_output)) + + MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal") + MCFG_RS232_RXD_HANDLER(DEVWRITELINE("duart68681", mc68681_device, rx_a_w)) + + MCFG_WD1770_ADD("wd1770", XTAL_8MHz ) + + MCFG_FLOPPY_DRIVE_ADD("wd1770:0", ht68k_floppies, "525dd", floppy_image_device::default_floppy_formats) + MCFG_FLOPPY_DRIVE_ADD("wd1770:1", ht68k_floppies, "525dd", floppy_image_device::default_floppy_formats) + MCFG_FLOPPY_DRIVE_ADD("wd1770:2", ht68k_floppies, "525dd", floppy_image_device::default_floppy_formats) + MCFG_FLOPPY_DRIVE_ADD("wd1770:3", ht68k_floppies, "525dd", floppy_image_device::default_floppy_formats) + + MCFG_SOFTWARE_LIST_ADD("flop525_list", "ht68k") +MACHINE_CONFIG_END + +/* ROM definition */ +ROM_START( ht68k ) + ROM_REGION( 0x8000, "user1", ROMREGION_ERASEFF ) + ROM_LOAD16_BYTE( "ht68k-u4.bin", 0x0000, 0x4000, CRC(3fbcdd0a) SHA1(45fcbbf920dc1e9eada3b7b0a55f5720d08ffdd5)) + ROM_LOAD16_BYTE( "ht68k-u3.bin", 0x0001, 0x4000, CRC(1d85d101) SHA1(8ba01e1595b0b3c4fb128a4a50242f3588b89c43)) +ROM_END + +/* Driver */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ +COMP( 1987, ht68k, 0, 0, ht68k, ht68k, driver_device, 0, "Hawthorne Technology", "TinyGiant HT68k", MACHINE_NO_SOUND) |