// license:BSD-3-Clause // copyright-holders:Curt Coder, Mike Naberezny /**************************************************************************** SSE HardBox emulation ****************************************************************************/ /* http://mikenaberezny.com/hardware/pet-cbm/sse-hardbox-corvus-interface/ The HardBox provides a CBM DOS interface for a Corvus hard disk. Before it can be used, a hard disk image must first be created and formatted. Use the CHDMAN utility to create a 20MB image: $ chdman createhd -o /path/to/corvus20mb.chd -chs 388,5,20 -ss 512 Start the pet8032 emulator with the HardBox attached as device 9, with the new CHD and the utilities floppy mounted: $ mame pet8032 -ieee9 hardbox \ -hard1 /path/to/corvus20mb.chd \ -flop1 /path/to/hardbox-utils.d80 Load and run the "configure" program from the floppy. When prompted for the HardBox device number, enter "9". Select "q" for quick configure at the menu. It will present a default drive size and ask if you want to alter it. If the size is not 20, change it to 20. After accepting the drive size, it will prompt if you want to perform a format check. This is optional. If you enter "y" to proceed with the format check, it will always report no bad sectors. Enter "y" to proceed with the format. After it has completed, the program will exit back to BASIC. The drive should now be usable. */ #include "emu.h" #include "hardbox.h" //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define Z80_TAG "z80" #define I8255_0_TAG "ic17" #define I8255_1_TAG "ic16" #define CORVUS_HDC_TAG "corvus" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(HARDBOX, hardbox_device, "hardbox", "SSE HardBox") //------------------------------------------------- // ROM( hardbox ) //------------------------------------------------- ROM_START( hardbox ) ROM_REGION( 0x2000, Z80_TAG, 0 ) ROM_DEFAULT_BIOS("v2.4") ROM_SYSTEM_BIOS( 0, "v2.3", "Version 2.3 (Corvus)" ) ROMX_LOAD( "295-2.3.ic3", 0x0000, 0x1000, CRC(a3eb5fc2) SHA1(39941b45b0696db928615c41c7eae18d951d9ada), ROM_BIOS(1) ) ROMX_LOAD( "296-2.3.ic4", 0x1000, 0x1000, CRC(fb55b058) SHA1(8f9ec313ec6beaf7b513edf39d9628e6abcc7bc3), ROM_BIOS(1) ) ROM_SYSTEM_BIOS( 1, "v2.4", "Version 2.4 (Corvus)" ) ROMX_LOAD( "289.ic3", 0x0000, 0x1000, CRC(c39e058f) SHA1(45b390d7125a40f84c7b411a479218baff079746), ROM_BIOS(2) ) ROMX_LOAD( "290.ic4", 0x1000, 0x1000, CRC(62f51405) SHA1(fdfa0d7b7e8d0182f2df0aa8163c790506104dcf), ROM_BIOS(2) ) ROM_SYSTEM_BIOS( 2, "v3.1", "Version 3.1 (Sunol)" ) ROMX_LOAD( "295-3.1.ic3", 0x0000, 0x1000, CRC(654a5db1) SHA1(c40859526921e3d8bfd58fc28cc9cc64e59ec638), ROM_BIOS(3) ) ROMX_LOAD( "296-3.1.ic4", 0x1000, 0x1000, CRC(4c62ddc0) SHA1(151f99dc554d3762b805fc8383cf1b3e1455784f), ROM_BIOS(3) ) /* Note: Two sets of EPROMs were found marked only "295" and "296" but they have different contents. The version numbers listed are the ROM version reported by the HardBox diagnostics program. Disassembling the ROMs showed that v2.3 and v2.4 are for Corvus Systems drives but v3.1 is for Sunol Systems drives. Both types use the Corvus flat cable interface but there may be some programming differences, e.g. the v3.1 firmware for Sunol does not have the park heads routine in the Corvus versions. MAME emulates a Corvus drive so we default to the last known HardBox firmware for Corvus (v2.4). */ ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *hardbox_device::device_rom_region() const { return ROM_NAME( hardbox ); } //------------------------------------------------- // ADDRESS_MAP( hardbox_mem ) //------------------------------------------------- void hardbox_device::hardbox_mem(address_map &map) { map(0x0000, 0x3fff).ram(); map(0xe000, 0xffff).rom().region(Z80_TAG, 0); } //------------------------------------------------- // ADDRESS_MAP( hardbox_io ) //------------------------------------------------- void hardbox_device::hardbox_io(address_map &map) { map.global_mask(0xff); map(0x10, 0x13).rw(I8255_0_TAG, FUNC(i8255_device::read), FUNC(i8255_device::write)); map(0x14, 0x17).rw(I8255_1_TAG, FUNC(i8255_device::read), FUNC(i8255_device::write)); map(0x18, 0x18).rw(CORVUS_HDC_TAG, FUNC(corvus_hdc_device::read), FUNC(corvus_hdc_device::write)); } //------------------------------------------------- // I8255A 0 interface //------------------------------------------------- READ8_MEMBER( hardbox_device::ppi0_pa_r ) { return m_bus->dio_r() ^ 0xff; } WRITE8_MEMBER( hardbox_device::ppi0_pb_w ) { m_bus->dio_w(this, data ^ 0xff); } READ8_MEMBER( hardbox_device::ppi0_pc_r ) { uint8_t data = ioport("SW1")->read(); /* DIP switches on PC1,PC2,PC3 configure the IEEE-488 primary address. We get the address from the slot instead. */ data |= ((m_slot->get_address() - 8) << 1) ^ 0xff; return data; } //------------------------------------------------- // I8255A 1 interface //------------------------------------------------- READ8_MEMBER( hardbox_device::ppi1_pa_r ) { /* bit description PA0 ATN PA1 DAV PA2 NDAC PA3 NRFD PA4 EOI PA5 SRQ PA6 REN PA7 IFC */ uint8_t data = 0; data |= !m_bus->atn_r(); data |= !m_bus->dav_r() << 1; data |= !m_bus->ndac_r() << 2; data |= !m_bus->nrfd_r() << 3; data |= !m_bus->eoi_r() << 4; data |= !m_bus->srq_r() << 5; data |= !m_bus->ren_r() << 6; data |= !m_bus->ifc_r() << 7; return data; } WRITE8_MEMBER( hardbox_device::ppi1_pb_w ) { /* bit description PB0 ATN PB1 DAV PB2 NDAC PB3 NRFD PB4 EOI PB5 SRQ PB6 REN PB7 IFC Note: When the PCB is configured as a HardBox instead of a SoftBox, IFC is read only. Do not connect IFC for output here. */ m_bus->atn_w(this, !BIT(data, 0)); m_bus->dav_w(this, !BIT(data, 1)); m_bus->ndac_w(this, !BIT(data, 2)); m_bus->nrfd_w(this, !BIT(data, 3)); m_bus->eoi_w(this, !BIT(data, 4)); m_bus->srq_w(this, !BIT(data, 5)); m_bus->ren_w(this, !BIT(data, 6)); } READ8_MEMBER( hardbox_device::ppi1_pc_r ) { /* bit description PC0 PC1 PC2 PC3 PC4 Corvus READY PC5 Corvus DIRC PC6 PC7 */ uint8_t status = m_hdc->status_r(space, 0); uint8_t data = 0; data |= (status & corvus_hdc_device::CONTROLLER_BUSY) ? 0 : 0x10; data |= (status & corvus_hdc_device::CONTROLLER_DIRECTION) ? 0 : 0x20; return data; } WRITE8_MEMBER( hardbox_device::ppi1_pc_w ) { /* bit description PC0 LED "A" PC1 LED "B" PC2 LED "READY" PC3 PC4 PC5 PC6 PC7 */ machine().output().set_led_value(LED_A, !BIT(data, 0)); machine().output().set_led_value(LED_B, !BIT(data, 1)); machine().output().set_led_value(LED_READY, !BIT(data, 2)); } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- MACHINE_CONFIG_START(hardbox_device::device_add_mconfig) // basic machine hardware MCFG_DEVICE_ADD(Z80_TAG, Z80, XTAL(8'000'000)/2) MCFG_DEVICE_PROGRAM_MAP(hardbox_mem) MCFG_DEVICE_IO_MAP(hardbox_io) // devices MCFG_DEVICE_ADD(I8255_0_TAG, I8255A, 0) MCFG_I8255_IN_PORTA_CB(READ8(*this, hardbox_device, ppi0_pa_r)) MCFG_I8255_OUT_PORTB_CB(WRITE8(*this, hardbox_device, ppi0_pb_w)) MCFG_I8255_IN_PORTC_CB(READ8(*this, hardbox_device, ppi0_pc_r)) MCFG_DEVICE_ADD(I8255_1_TAG, I8255A, 0) MCFG_I8255_IN_PORTA_CB(READ8(*this, hardbox_device, ppi1_pa_r)) MCFG_I8255_OUT_PORTB_CB(WRITE8(*this, hardbox_device, ppi1_pb_w)) MCFG_I8255_IN_PORTC_CB(READ8(*this, hardbox_device, ppi1_pc_r)) MCFG_I8255_OUT_PORTC_CB(WRITE8(*this, hardbox_device, ppi1_pc_w)) MCFG_DEVICE_ADD(CORVUS_HDC_TAG, CORVUS_HDC, 0) MCFG_HARDDISK_ADD("harddisk1") MCFG_HARDDISK_INTERFACE("corvus_hdd") MCFG_HARDDISK_ADD("harddisk2") MCFG_HARDDISK_INTERFACE("corvus_hdd") MCFG_HARDDISK_ADD("harddisk3") MCFG_HARDDISK_INTERFACE("corvus_hdd") MCFG_HARDDISK_ADD("harddisk4") MCFG_HARDDISK_INTERFACE("corvus_hdd") MACHINE_CONFIG_END //------------------------------------------------- // INPUT_PORTS( hardbox ) //------------------------------------------------- INPUT_PORTS_START( hardbox ) PORT_START("SW1") PORT_DIPUNKNOWN_DIPLOC( 0x01, IP_ACTIVE_LOW, "SW1:1" ) PORT_DIPNAME( 0x0e, 0x0c, "Device Address" ) PORT_DIPLOCATION("SW1:2,3,4") PORT_DIPSETTING( 0x0e, "8" ) PORT_DIPSETTING( 0x0c, "9" ) PORT_DIPSETTING( 0x0a, "10" ) PORT_DIPSETTING( 0x08, "11" ) PORT_DIPSETTING( 0x06, "12" ) PORT_DIPSETTING( 0x04, "13" ) PORT_DIPSETTING( 0x02, "14" ) PORT_DIPSETTING( 0x00, "15" ) PORT_DIPUNKNOWN_DIPLOC( 0x10, IP_ACTIVE_LOW, "SW1:5" ) PORT_DIPUNKNOWN_DIPLOC( 0x20, IP_ACTIVE_LOW, "SW1:6" ) PORT_DIPUNKNOWN_DIPLOC( 0x40, IP_ACTIVE_LOW, "SW1:7" ) PORT_DIPUNKNOWN_DIPLOC( 0x80, IP_ACTIVE_LOW, "SW1:8" ) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor hardbox_device::device_input_ports() const { return INPUT_PORTS_NAME( hardbox ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // hardbox_device - constructor //------------------------------------------------- hardbox_device::hardbox_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, HARDBOX, tag, owner, clock) , device_ieee488_interface(mconfig, *this) , m_maincpu(*this, Z80_TAG) , m_hdc(*this, CORVUS_HDC_TAG) , m_ifc(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void hardbox_device::device_start() { } //------------------------------------------------- // device_reset_after_children - device-specific // reset that must happen after child devices // have performed their resets //------------------------------------------------- void hardbox_device::device_reset_after_children() { /* The Z80 starts at address 0x0000 but the HardBox has RAM there and needs to start from the BIOS at 0xe000. The PCB has logic and a 74S287 PROM that temporarily changes the memory map so that the IC3 EPROM at 0xe000 is mapped to 0x0000 for the first instruction fetch only. The instruction normally at 0xe000 is an absolute jump into the ROM. On reset, the Z80 will fetch it from 0x0000 and set its PC, then the normal map will be restored before the next instruction fetch. Here we just set the PC to 0xe000 after the Z80 resets, which has the same effect. */ m_maincpu->set_state_int(Z80_PC, 0xe000); } //------------------------------------------------- // ieee488_ifc - interface clear (reset) //------------------------------------------------- void hardbox_device::ieee488_ifc(int state) { if (!m_ifc && state) { device_reset(); } m_ifc = state; }