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Diffstat (limited to 'src/mame/drivers/68ksbc.cpp')
-rw-r--r-- | src/mame/drivers/68ksbc.cpp | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/mame/drivers/68ksbc.cpp b/src/mame/drivers/68ksbc.cpp new file mode 100644 index 00000000000..2ff1bc85cac --- /dev/null +++ b/src/mame/drivers/68ksbc.cpp @@ -0,0 +1,98 @@ +// license:BSD-3-Clause +// copyright-holders:Robbbert +/*************************************************************************** + + Skeleton driver for 68k Single Board Computer + + 29/03/2011 + + http://www.kmitl.ac.th/~kswichit/68k/68k.html + + TODO: + - Add RTC (type DS12887) + + All of the address and i/o decoding is done by a pair of XC9536 + mask-programmed custom devices. + + There are some chips used for unclear purposes (GPI, GPO, LCD). + + This computer has no sound, and no facility for saving or loading programs. + + When started, press ? key for a list of commands. + + Has 1MB of flash (which is actually just 12k of program), + and 1MB of RAM. Memory map should probably be corrected. + + +****************************************************************************/ + +#include "bus/rs232/rs232.h" +#include "cpu/m68000/m68000.h" +#include "machine/6850acia.h" +#include "machine/clock.h" + + +class c68ksbc_state : public driver_device +{ +public: + c68ksbc_state(const machine_config &mconfig, device_type type, const char *tag) : + driver_device(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_acia(*this, "acia") + { + } + + DECLARE_WRITE_LINE_MEMBER(write_acia_clock); + +private: + required_device<cpu_device> m_maincpu; + required_device<acia6850_device> m_acia; +}; + +static ADDRESS_MAP_START(c68ksbc_mem, AS_PROGRAM, 16, c68ksbc_state) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x000000, 0x002fff) AM_ROM + AM_RANGE(0x003000, 0x5fffff) AM_RAM + AM_RANGE(0x600000, 0x600001) AM_DEVREADWRITE8("acia", acia6850_device, status_r, control_w, 0x00ff) + AM_RANGE(0x600002, 0x600003) AM_DEVREADWRITE8("acia", acia6850_device, data_r, data_w, 0x00ff) +ADDRESS_MAP_END + + +/* Input ports */ +static INPUT_PORTS_START( c68ksbc ) +INPUT_PORTS_END + + +WRITE_LINE_MEMBER(c68ksbc_state::write_acia_clock) +{ + m_acia->write_txc(state); + m_acia->write_rxc(state); +} + +static MACHINE_CONFIG_START( c68ksbc, c68ksbc_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu", M68000, 8000000) // text says 8MHz, schematic says 10MHz + MCFG_CPU_PROGRAM_MAP(c68ksbc_mem) + + MCFG_DEVICE_ADD("acia", ACIA6850, 0) + MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd)) + MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts)) + + MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal") + MCFG_RS232_RXD_HANDLER(DEVWRITELINE("acia", acia6850_device, write_rxd)) + MCFG_RS232_CTS_HANDLER(DEVWRITELINE("acia", acia6850_device, write_cts)) + + MCFG_DEVICE_ADD("acia_clock", CLOCK, 153600) + MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(c68ksbc_state, write_acia_clock)) +MACHINE_CONFIG_END + +/* ROM definition */ +ROM_START( 68ksbc ) + ROM_REGION(0x1000000, "maincpu", 0) + ROM_LOAD( "t68k.bin", 0x0000, 0x2f78, CRC(20a8d0d0) SHA1(544fd8bd8ed017115388c8b0f7a7a59a32253e43) ) +ROM_END + +/* Driver */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ +COMP( 2002, 68ksbc, 0, 0, c68ksbc, c68ksbc, driver_device, 0, "Wichit Sirichote", "68k Single Board Computer", MACHINE_NO_SOUND_HW) |