diff options
Diffstat (limited to 'src/devices/bus/a2bus/a2vulcan.c')
-rw-r--r-- | src/devices/bus/a2bus/a2vulcan.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/src/devices/bus/a2bus/a2vulcan.c b/src/devices/bus/a2bus/a2vulcan.c new file mode 100644 index 00000000000..ff155f25acd --- /dev/null +++ b/src/devices/bus/a2bus/a2vulcan.c @@ -0,0 +1,302 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont +/********************************************************************* + + a2vulcan.c + + Applied Engineering Vulcan IDE controller + + Our copy of ROM version 1.4 will refuse any drive > 40 megs (top 2 bytes of # blocks >= 0x15b). + Protection against field upgrades? + + Vulcan Gold ROMs omit this protection but don't work with the version of the partitioner program + we have. + + Recognized drives by IDE features parameters: + (# of cylinders is never checked, just heads, sectors, and the vendor specific at 0x0A) + + H S Vendor specific #5 + 8, 33 + 0x69 0x31d blocks (400K?!) + 2, 33 + 0x69 0xa208 blocks (20 megs, 21237760 bytes) + 4, 26 + 0x69 0x14500 blocks (40 megs, 42598400 bytes) + 5, 29 + (any) 0x25c5b blocks (80 megs, 79214080 bytes) (chs = 1067,5,29) + 7, 29 + 0x44 0x34e19 blocks (100 megs, 110899712 bytes) + 9, 29 + (any) 0x44068 blocks (140 megs, 142659584 bytes) (chs = 1068,9,29) + 9, 36 + 0x44 0x54888 blocks (180 megs, 177278976 bytes) + 9, 36 + 0xff 0x645a8 blocks (200 megs, 210456576 bytes) + 7, 34 + (any) 0x32252 blocks (100 megs, 105161728 bytes) (chs = 863,7,34) + 4, 17 + 0x55 0xa218 blocks (20 megs, 21245952 bytes) + 4, 26 + 0x55 0xa218 blocks (20 megs, 21245952 bytes) + 5, 17 + 0x55 0x15234 blocks (40 megs, 44328960 bytes) + 6, 26 + 0x55 0x15234 blocks (40 megs, 44328960 bytes) + 2, 28 + 0x36 0xa250 blocks (20 megs, 21274624 bytes) + 4, 28 + 0x36 0x143c0 blocks (40 megs, 42434450 bytes) + 4, 28 + 0x67 0x143c0 blocks (40 megs, 42434450 bytes) + 4, 27 + 0x43 0x147cc blocks (40 megs, 42964992 bytes) + 5, 17 + 0x26 0x13ec0 blocks (40 megs, 41779200 bytes) (chs = 960,5,17) + 15, 32 + 0x43 0x5f6e0 blocks (200 megs, 200130560 bytes) + 16, 38 + 0x94 0x6540c blocks (200 megs, 212342784 bytes) + 10, 17 + (any) 0x2792f blocks (80 megs, 82992640 bytes) (chs = 954,10,17) + + Partition block: + +0000: 0xAE 0xAE signature + +0002: bytesum of remaining 508 bytes of partition block + +0005: total # of blocks (3 bytes) + +000E: boot partition # (0 based) + +0100: partition records + + Partition record: + +02: partition number (seems to be only valud for non-CLEAR partitions) + +03: little-endian unsigned word: # of 512 byte blocks + +06: bit 6 set for ON, bits 0-2 = 0 CLEAR, 1 PRODOS, 2 DOS 3.3, 3 PASCAL, 4 CP/M + +07: Partition name (Apple high-ASCII, zero terminated unless full 10 chars) + +*********************************************************************/ + +#include "a2vulcan.h" +#include "includes/apple2.h" +#include "machine/ataintf.h" +#include "imagedev/harddriv.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type A2BUS_VULCAN = &device_creator<a2bus_vulcan_device>; +const device_type A2BUS_VULCANGOLD = &device_creator<a2bus_vulcangold_device>; + +#define VULCAN_ROM_REGION "vulcan_rom" +#define VULCAN_ATA_TAG "vulcan_ata" + +static MACHINE_CONFIG_FRAGMENT( vulcan ) + MCFG_ATA_INTERFACE_ADD(VULCAN_ATA_TAG, ata_devices, "hdd", NULL, false) +MACHINE_CONFIG_END + +ROM_START( vulcan ) + ROM_REGION(0x4000, VULCAN_ROM_REGION, 0) + ROM_LOAD( "ae vulcan rom v1.4.bin", 0x000000, 0x004000, CRC(798d5825) SHA1(1d668e856e33c6eeb10fe26975341afa8acb81f5) ) +ROM_END + +ROM_START( vulcangold ) + ROM_REGION(0x4000, VULCAN_ROM_REGION, 0) + ROM_LOAD( "ae vulcan gold rom v2.0.bin", 0x000000, 0x004000, CRC(19bc3958) SHA1(96a22c2540fa603648a4e638e176eee76523b4e1) ) +ROM_END + +/*************************************************************************** + FUNCTION PROTOTYPES +***************************************************************************/ + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor a2bus_vulcanbase_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( vulcan ); +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *a2bus_vulcan_device::device_rom_region() const +{ + return ROM_NAME( vulcan ); +} + +const rom_entry *a2bus_vulcangold_device::device_rom_region() const +{ + return ROM_NAME( vulcangold ); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +a2bus_vulcanbase_device::a2bus_vulcanbase_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_a2bus_card_interface(mconfig, *this), + m_ata(*this, VULCAN_ATA_TAG) +{ +} + +a2bus_vulcan_device::a2bus_vulcan_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + a2bus_vulcanbase_device(mconfig, A2BUS_VULCAN, "Applied Engineering Vulcan IDE controller", tag, owner, clock, "a2vulcan", __FILE__) +{ +} + +a2bus_vulcangold_device::a2bus_vulcangold_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + a2bus_vulcanbase_device(mconfig, A2BUS_VULCAN, "Applied Engineering Vulcan Gold IDE controller", tag, owner, clock, "a2vulgld", __FILE__) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void a2bus_vulcanbase_device::device_start() +{ + // set_a2bus_device makes m_slot valid + set_a2bus_device(); + + m_rom = device().machine().root_device().memregion(this->subtag(VULCAN_ROM_REGION).c_str())->base(); + + save_item(NAME(m_lastdata)); + save_item(NAME(m_ram)); + save_item(NAME(m_rombank)); + save_item(NAME(m_rambank)); +} + +void a2bus_vulcan_device::device_start() +{ + // call base class + a2bus_vulcanbase_device::device_start(); + + // disable 40 meg partition size limit / protection in v1.4 ROMs + m_rom[0x59e] = 0xea; + m_rom[0x59f] = 0xea; +} + +void a2bus_vulcanbase_device::device_reset() +{ + m_rombank = m_rambank = 0; + m_last_read_was_0 = false; +} + + +/*------------------------------------------------- + read_c0nx - called for reads from this card's c0nx space +-------------------------------------------------*/ + +UINT8 a2bus_vulcanbase_device::read_c0nx(address_space &space, UINT8 offset) +{ + switch (offset) + { + case 0: + m_lastdata = m_ata->read_cs0(space, offset, 0xffff); +// printf("IDE: read %04x\n", m_lastdata); + m_last_read_was_0 = true; + return m_lastdata&0xff; + + case 1: + if (m_last_read_was_0) + { + m_last_read_was_0 = false; + return (m_lastdata>>8) & 0xff; + } + else + { + return m_ata->read_cs0(space, offset, 0xff); + } + + case 2: + case 3: + case 4: + case 5: + case 6: + case 7: + return m_ata->read_cs0(space, offset, 0xff); + + default: + logerror("a2vulcan: unknown read @ C0n%x\n", offset); + break; + + } + + return 0xff; +} + + +/*------------------------------------------------- + write_c0nx - called for writes to this card's c0nx space +-------------------------------------------------*/ + +void a2bus_vulcanbase_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) +{ + switch (offset) + { + case 0: + m_lastdata = data; + m_last_read_was_0 = true; + break; + + case 1: + if (m_last_read_was_0) + { + m_last_read_was_0 = false; + m_lastdata &= 0x00ff; + m_lastdata |= (data << 8); +// printf("IDE: write %04x\n", m_lastdata); + m_ata->write_cs0(space, 0, m_lastdata, 0xffff); + } + else + { + m_ata->write_cs0(space, offset, data, 0xff); + } + break; + + case 2: + case 3: + case 4: + case 5: + case 6: + case 7: +// printf("%02x to IDE controller @ %x\n", data, offset); + m_ata->write_cs0(space, offset, data, 0xff); + break; + + case 9: // ROM bank +// printf("%x (%x) to ROM bank\n", data, (data & 0xf) * 0x400); + m_rombank = (data & 0xf) * 0x400; + break; + + case 0xa: // RAM bank +// printf("%x to RAM bank\n", data); + m_rambank = (data & 7) * 0x400; + break; + + default: + logerror("a2vulcan: write %02x @ unhandled C0n%x\n", data, offset); + break; + } +} + +/*------------------------------------------------- + read_cnxx - called for reads from this card's cnxx space +-------------------------------------------------*/ + +UINT8 a2bus_vulcanbase_device::read_cnxx(address_space &space, UINT8 offset) +{ + int slotimg = m_slot * 0x100; + + // ROM contains a CnXX image for each of slots 1-7 at 0x3400 + return m_rom[offset+slotimg+0x3400]; +} + +/*------------------------------------------------- + read_c800 - called for reads from this card's c800 space +-------------------------------------------------*/ + +UINT8 a2bus_vulcanbase_device::read_c800(address_space &space, UINT16 offset) +{ + offset &= 0x7ff; + if (offset < 0x400) // c800-cbff is banked RAM window, cc00-cfff is banked ROM window + { +// printf("read RAM @ %x (bank %x)\n", offset, m_rambank); + return m_ram[offset + m_rambank]; + } + + offset -= 0x400; + return m_rom[offset+m_rombank]; +} + +void a2bus_vulcanbase_device::write_c800(address_space &space, UINT16 offset, UINT8 data) +{ + offset &= 0x7ff; + if (offset < 0x400) + { +// printf("%02x to RAM @ %x (bank %x)\n", data, offset, m_rambank); + m_ram[offset + m_rambank] = data; + } +} |