diff options
Diffstat (limited to 'src/devices/bus/a1bus/a1cffa.c')
-rw-r--r-- | src/devices/bus/a1bus/a1cffa.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/devices/bus/a1bus/a1cffa.c b/src/devices/bus/a1bus/a1cffa.c new file mode 100644 index 00000000000..f67470bb5db --- /dev/null +++ b/src/devices/bus/a1bus/a1cffa.c @@ -0,0 +1,156 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont +/********************************************************************* + + a1cffa.c + + Rich Dreher's Compact Flash for Apple I + +*********************************************************************/ + +#include "a1cffa.h" + +/*************************************************************************** + PARAMETERS +***************************************************************************/ + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +#define CFFA_ROM_REGION "cffa_rom" +#define CFFA_ATA_TAG "cffa_ata" + +const device_type A1BUS_CFFA = &device_creator<a1bus_cffa_device>; + +MACHINE_CONFIG_FRAGMENT( cffa ) + MCFG_ATA_INTERFACE_ADD(CFFA_ATA_TAG, ata_devices, "hdd", NULL, false) +MACHINE_CONFIG_END + +ROM_START( cffa ) + ROM_REGION(0x2000, CFFA_ROM_REGION, 0) + ROM_LOAD ("cffaromv1.1.bin", 0x0000, 0x1fe0, CRC(bf6b55ad) SHA1(6a290be18485a06f243a3561c4e01be5aafa4bfe) ) +ROM_END + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor a1bus_cffa_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( cffa ); +} + +const rom_entry *a1bus_cffa_device::device_rom_region() const +{ + return ROM_NAME( cffa ); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +a1bus_cffa_device::a1bus_cffa_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, A1BUS_CFFA, "CFFA Compact Flash for Apple I", tag, owner, clock, "cffa1", __FILE__), + device_a1bus_card_interface(mconfig, *this), + m_ata(*this, CFFA_ATA_TAG) +{ +} + +a1bus_cffa_device::a1bus_cffa_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) : + device_t(mconfig, type, name, tag, owner, clock, shortname, source), + device_a1bus_card_interface(mconfig, *this), + m_ata(*this, CFFA_ATA_TAG) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void a1bus_cffa_device::device_start() +{ + set_a1bus_device(); + + m_rom = device().machine().root_device().memregion(this->subtag(CFFA_ROM_REGION).c_str())->base(); + + install_device(0xafe0, 0xafff, read8_delegate(FUNC(a1bus_cffa_device::cffa_r), this), write8_delegate(FUNC(a1bus_cffa_device::cffa_w), this)); + install_bank(0x9000, 0xafdf, 0, 0, (char *)"bank_cffa1", m_rom); + + save_item(NAME(m_lastdata)); + save_item(NAME(m_writeprotect)); +} + +void a1bus_cffa_device::device_reset() +{ + m_writeprotect = false; + m_lastdata = 0; +} + +READ8_MEMBER(a1bus_cffa_device::cffa_r) +{ + switch (offset & 0xf) + { + case 0x0: + return m_lastdata>>8; + + case 0x3: + m_writeprotect = false; + break; + + case 0x4: + m_writeprotect = true; + break; + + case 0x8: + m_lastdata = m_ata->read_cs0(space, (offset & 0xf) - 8, 0xff); + return m_lastdata & 0x00ff; + + case 0x9: + case 0xa: + case 0xb: + case 0xc: + case 0xd: + case 0xe: + case 0xf: + return m_ata->read_cs0(space, (offset & 0xf) - 8, 0xff); + } + + return 0xff; +} + +WRITE8_MEMBER(a1bus_cffa_device::cffa_w) +{ + switch (offset & 0xf) + { + case 0x0: + m_lastdata &= 0x00ff; + m_lastdata |= data<<8; + break; + + case 0x3: + m_writeprotect = false; + break; + + case 0x4: + m_writeprotect = true; + break; + + + case 0x8: + m_ata->write_cs0(space, (offset & 0xf) - 8, data, 0xff); + break; + + case 0x9: + case 0xa: + case 0xb: + case 0xc: + case 0xd: + case 0xe: + case 0xf: + m_ata->write_cs0(space, (offset & 0xf) - 8, data, 0xff); + break; + + } +} |