diff options
Diffstat (limited to 'src/devices/bus/isa/finalchs.c')
-rw-r--r-- | src/devices/bus/isa/finalchs.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/devices/bus/isa/finalchs.c b/src/devices/bus/isa/finalchs.c new file mode 100644 index 00000000000..212a05cad87 --- /dev/null +++ b/src/devices/bus/isa/finalchs.c @@ -0,0 +1,127 @@ +// license:BSD-3-Clause +// copyright-holders:Jonathan Gevaryahu +/*************************************************************************** + + Final Chess Card by TASC + + TODO: + - skeleton, just boots the CPU + +***************************************************************************/ + +#include "emu.h" +#include "finalchs.h" +#include "cpu/m6502/m65c02.h" + +WRITE8_MEMBER( isa8_finalchs_device::io7ff8_write ) +{ + m_FCH_latch_data = data; +} + +READ8_MEMBER( isa8_finalchs_device::io7ff8_read ) +{ + static unsigned char table[] = { 0xff, 0xfd, 0xfe }; + static int i = -1; + i++; + if (i == 3) i = 0; + return table[i]; // exercise the NMI handler for now with known commands +} + +READ8_MEMBER( isa8_finalchs_device::io6000_read ) +{ + return 0x55; +} + +WRITE8_MEMBER( isa8_finalchs_device::io6000_write ) +{ + m_FCH_latch_data = data; +} + +static ADDRESS_MAP_START(finalchs_mem , AS_PROGRAM, 8, isa8_finalchs_device) + AM_RANGE( 0x0000, 0x1fff ) AM_RAM + AM_RANGE( 0x7ff8, 0x7ff8 ) AM_READ(io7ff8_read) + AM_RANGE( 0x7ff8, 0x7ff8 ) AM_WRITE(io7ff8_write) + AM_RANGE( 0x6000, 0x6000 ) AM_READ(io6000_read) + AM_RANGE( 0x6000, 0x6000 ) AM_WRITE(io6000_write) + AM_RANGE( 0x8000, 0xffff ) AM_ROM +ADDRESS_MAP_END + +static MACHINE_CONFIG_FRAGMENT( finalchs_config ) + MCFG_CPU_ADD("maincpu",M65C02,5000000) + MCFG_CPU_PROGRAM_MAP(finalchs_mem) +MACHINE_CONFIG_END + +ROM_START(finalchs) + ROM_REGION(0x10000,"maincpu",0) + ROM_LOAD("finalchs.bin", 0x8000, 0x8000, CRC(c8e72dff) SHA1(f422b19a806cef4fadd580caefaaf8c32b644098)) +ROM_END + +READ8_MEMBER( isa8_finalchs_device::finalchs_r ) +{ + return 0; +} + +WRITE8_MEMBER( isa8_finalchs_device::finalchs_w ) +{ +} + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type ISA8_FINALCHS = &device_creator<isa8_finalchs_device>; + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor isa8_finalchs_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( finalchs_config ); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// isa8_finalchs_device - constructor +//------------------------------------------------- + +isa8_finalchs_device::isa8_finalchs_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, ISA8_FINALCHS, "Final Chess Card", tag, owner, clock, "finalchs", __FILE__), + device_isa8_card_interface( mconfig, *this ) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void isa8_finalchs_device::device_start() +{ + set_isa_device(); + //the included setup program allows any port from 0x100 to 0x1F0 to be selected, at increments of 0x10 + //picked the following at random until we get dips hooked up + m_isa->install_device(0x160, 0x0161, 0, 0, read8_delegate(FUNC(isa8_finalchs_device::finalchs_r), this), write8_delegate(FUNC(isa8_finalchs_device::finalchs_w), this)); +// timer_pulse(machine, ATTOTIME_IN_HZ(1), NULL, 0, cause_M6502_irq); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void isa8_finalchs_device::device_reset() +{ + m_FCH_latch_data = 0; +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *isa8_finalchs_device::device_rom_region() const +{ + return ROM_NAME( finalchs ); +} |