diff options
author | 2013-02-18 21:11:17 +0000 | |
---|---|---|
committer | 2013-02-18 21:11:17 +0000 | |
commit | d9cdaf16491d1ed13fb85054484d1b3fd9ed84f1 (patch) | |
tree | 5ab2831e8b5a6525590518cb3812021ea39caa9d /src/mess/machine/a2zipdrive.c | |
parent | b151e90f28ce25999e616f45dc6da1cacfb39036 (diff) |
(MESS) Apple II: Added support for Street Electronics Echo Plus and Zip Technologies ZipDrive cards [R. Belmont, Lord Nightmare]
Diffstat (limited to 'src/mess/machine/a2zipdrive.c')
-rw-r--r-- | src/mess/machine/a2zipdrive.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/src/mess/machine/a2zipdrive.c b/src/mess/machine/a2zipdrive.c new file mode 100644 index 00000000000..c3bdefe2a73 --- /dev/null +++ b/src/mess/machine/a2zipdrive.c @@ -0,0 +1,199 @@ +/********************************************************************* + + a2zipdrive.c + + ZIP Technologies ZipDrive IDE card + + NOTE: No known dump exists of the formatter utility and the + format of the custom partition record (block 0) that the card + expects has not yet been determined, so this is largely untested + and will work only with a drive dump from real h/w. + + PLEASE use it only on a backup copy of said dump and contact MESSdev + if you have one! + + Partition block format: + +0000: ASCII "Zip Technologies" + +*********************************************************************/ + +#include "a2zipdrive.h" +#include "includes/apple2.h" +#include "machine/idectrl.h" +#include "imagedev/harddriv.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type A2BUS_ZIPDRIVE = &device_creator<a2bus_zipdrive_device>; + +#define ZIPDRIVE_ROM_REGION "zipdrive_rom" +#define ZIPDRIVE_IDE_TAG "zipdrive_ide" + +static MACHINE_CONFIG_FRAGMENT( zipdrive ) + MCFG_IDE_CONTROLLER_ADD(ZIPDRIVE_IDE_TAG, ide_image_devices, "hdd", "hdd", false) +MACHINE_CONFIG_END + +ROM_START( zipdrive ) + ROM_REGION(0x2000, ZIPDRIVE_ROM_REGION, 0) + ROM_LOAD( "zip drive - rom.bin", 0x000000, 0x002000, CRC(fd800a40) SHA1(46636bfed88c864139e3d2826661908a8c07c459) ) +ROM_END + +/*************************************************************************** + FUNCTION PROTOTYPES +***************************************************************************/ + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor a2bus_zipdrivebase_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( zipdrive ); +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *a2bus_zipdrivebase_device::device_rom_region() const +{ + return ROM_NAME( zipdrive ); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +a2bus_zipdrivebase_device::a2bus_zipdrivebase_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, type, name, tag, owner, clock), + device_a2bus_card_interface(mconfig, *this), + m_ide(*this, ZIPDRIVE_IDE_TAG) +{ +} + +a2bus_zipdrive_device::a2bus_zipdrive_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + a2bus_zipdrivebase_device(mconfig, A2BUS_ZIPDRIVE, "Zip Technologies ZipDrive", tag, owner, clock) +{ + m_shortname = "a2zipdrv"; +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void a2bus_zipdrivebase_device::device_start() +{ + // set_a2bus_device makes m_slot valid + set_a2bus_device(); + + astring tempstring; + m_rom = device().machine().root_device().memregion(this->subtag(tempstring, ZIPDRIVE_ROM_REGION))->base(); + + save_item(NAME(m_lastdata)); +} + +void a2bus_zipdrivebase_device::device_reset() +{ + popmessage("Zip Drive partition format unknown, contact MESSdev if you have the software or a drive dump!"); +} + + +/*------------------------------------------------- + read_c0nx - called for reads from this card's c0nx space +-------------------------------------------------*/ + +UINT8 a2bus_zipdrivebase_device::read_c0nx(address_space &space, UINT8 offset) +{ + switch (offset) + { + case 0: + case 1: + case 2: + case 3: + case 4: + case 5: + case 6: + case 7: + return ide_controller_r(m_ide, 0x1f0+offset, 1); + + case 8: // data port + m_lastdata = ide_controller_r(m_ide, 0x1f0, 2); +// printf("%04x @ IDE data\n", m_lastdata); + return m_lastdata&0xff; + + case 9: + return (m_lastdata>>8) & 0xff; + + default: + logerror("a2zipdrive: unhandled read @ C0n%x\n", offset); + break; + } + + return 0xff; +} + + +/*------------------------------------------------- + write_c0nx - called for writes to this card's c0nx space +-------------------------------------------------*/ + +void a2bus_zipdrivebase_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) +{ + switch (offset) + { + case 0: + case 1: + case 2: + case 3: + case 4: + case 5: + case 6: + case 7: +// printf("%02x to IDE controller @ %x\n", data, offset); + ide_controller_w(m_ide, 0x1f0+offset, 1, data); + break; + + case 8: +// printf("%02x to IDE data lo\n", data); + m_lastdata = data; + break; + + case 9: +// printf("%02x to IDE data hi\n", data); + m_lastdata &= 0x00ff; + m_lastdata |= (data << 8); + ide_controller_w(m_ide, 0x1f0, 2, m_lastdata); + break; + + default: + logerror("a2zipdrive: write %02x @ unhandled C0n%x\n", data, offset); + break; + } +} + +/*------------------------------------------------- + read_cnxx - called for reads from this card's cnxx space +-------------------------------------------------*/ + +UINT8 a2bus_zipdrivebase_device::read_cnxx(address_space &space, UINT8 offset) +{ + int slotimg = m_slot * 0x100; + + // ROM contains CnXX images for each of slots 1-7 at 0x0 and 0x1000 + return m_rom[offset+slotimg+0x1000]; +} + +/*------------------------------------------------- + read_c800 - called for reads from this card's c800 space +-------------------------------------------------*/ + +UINT8 a2bus_zipdrivebase_device::read_c800(address_space &space, UINT16 offset) +{ + offset &= 0x7ff; + + return m_rom[offset+0x1800]; +} + |