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Diffstat (limited to 'src/mame/machine/pc80s31k.cpp')
-rw-r--r-- | src/mame/machine/pc80s31k.cpp | 460 |
1 files changed, 0 insertions, 460 deletions
diff --git a/src/mame/machine/pc80s31k.cpp b/src/mame/machine/pc80s31k.cpp deleted file mode 100644 index eb05acb8cfd..00000000000 --- a/src/mame/machine/pc80s31k.cpp +++ /dev/null @@ -1,460 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Angelo Salese, Olivier Galibert -/************************************************************************************************** - - NEC PC-80S31(K) Mini Disk Unit - - Z80 + μPD765 + PPI that connects in cross with an host PPI - - "Mini" as compared to the PC-8881 8-inch floppy I/F - - Design is decidedly derived from Epson TF-20 and friends, - cfr. devices/bus/epson_sio/tf20.cpp - - TODO: - - What's PC-80S32? Is it the 88VA version or a different beast? - - PC=0x7dd reads from FDC bit 3 in ST3 (twosid_r fn), - expecting a bit 3 high for all the PC8001 games otherwise keeps looping and eventually dies. - Are those incorrectly identified as 2DD? Hacked to work for now; - - set_input_line_vector fn doesn't work properly when issued from a device_reset, - we currently just implement the irq_callback instead; - - Bus option; - - Cascade mode, i.e. the CN2 connector used to accept a second disk unit for drive 2 & 3; - - pc80s31k: verify that irq vector write (I/O port $f0) belongs here or just - whatever PC88VA uses. - - printer interface (used for debugging? 4-bit serial?) - - Pinpoint what host I/O ports $f6, $f7 truly are - (direct FDC access from this device or a different beast? cfr. play6lim with pc8001mk2) - - filemst tries to access undocumented I/O port $09 at PC=5000: - \- If that's 0 then it tries to read a vector at [0x8000]; - \- It then tries to read at memory [0xc0ff], set the value read in [0xf012]; - \- Expects that ROM [0x0000] is not equal to 0xc3; - Bottom line: Is it trying to access some custom HW? - -=================================================================================================== - -PCB (PC-80S31K) - -=================================================================================================== - - |--------------------------------------| - | P1 P2 P3 X1 | - | | - | CN2 | - | B6102C022 | - | FD1 FD2 (**) | - | | | | - | CN1 ------- D765AC D2364EC (*)| - | (*)| - | D8255AC-2 B6101C017 D780C-1 | - | | - |--------------------------------------| - - PCB is marked PC-80S31KFDC NEC-14T - P1, P2, P3 are power supplies (+5V, +12V, -5V for P1, lacks -5V for the other two) - μPD2364EC is at position IC13, it's a 8192 size ROM. (***) - (*) are μPD41416C - (**) marked as JP, unpopulated x 3; - μPB6101/2 are bipolar TTL gate arrays, presumably - Cannot read marking of X1 (8 MHz?) - - (***) Given this, we guess that PC80S31 is the 2D version while the 'K - variant is the 2D/2DD/2HD version. - -=================================================================================================== - -Command Protocol - -=================================================================================================== - -Command & parameters are normally communicated from Host via port B -(read on port A on FDC side) -An RPi implementation can be seen at https://github.com/MinatsuT/RPi_PC-80S31 - -[0x00] Initialize -[0x01] Write to disk - %1 number of sectors - %2 drive number - %3 track number - %4 sector number +1 -[0x02] Read from disk - %1 number of sectors - %2 drive number - %3 track number - %4 sector number +1 -[0x03] Send data to host -[0x04] Copy data in-place - %1 number of sectors - %2 source drive - %3 source track - %4 source sector number +1 - %5 destination drive - %6 destination track - %7 destination sector number +1 -[0x05] Format - %1 drive number -[0x06] Send result status to Host - x--- ---- I/O complete - -x-- ---- has unread buffer - ---- ---x error occurred -[0x07] Drive status -[0x0b] Send memory data -%1-%2 address start -%3-%4 length -[0x11] Fast write to disk - %1 number of sectors - %2 drive number - %3 track number - %4 sector number +1 -[0x12] Fast send data - (picks up number of sector etc. from previous issued commands?) -[0x14] Device status - x--- ---- ESIG: error - -x-- ---- WPDR: write protected - --x- ---- RDY: ready - ---x ---- TRK0: track 0 - ---- x--- DSDR: double sided drive - ---- -x-- HDDR: head - ---- --xx DS1, DS2: drive select - (same as 765 ST3?) -[0x17] Mode change - %1 ---- xxxx mode select - -FDC normally puts ST0-1-2 to RAM buffers $7f0d-f, CHRN data in $7f10-13 - -=================================================================================================== - -Port C -Used as a communication protocol flags - -=================================================================================================== - - Host side - (swap 4-bit nibbles and r/w direction for FDC side, all bits are active high): - x--- ---- (w) ATN AtenTioN: - host sends a command to FDC, interrupts current one - (looks unconnected the other way around?) - -x-- ---- (w) DAC DAta aCcepted: - host just picked up data from FDC - --x- ---- (w) RFD Ready For Data: - host requests data from FDC - ---x ---- (w) DAV DAta Valid: - host outputs data to port B - ---- -x-- (r) DAC DAta aCcepted: - FDC has accepted data from port B - ---- --x- (r) RFD Ready For Data: - FDC requests data from host - ---- ---x (r) DAV DAta Valid: - FDC has output data to port A - -**************************************************************************************************/ - -#include "emu.h" -#include "pc80s31k.h" - -//#define VERBOSE 1 -#include "logmacro.h" - -//************************************************************************** -// GLOBAL VARIABLES -//************************************************************************** - - -// device type definition -DEFINE_DEVICE_TYPE(PC80S31, pc80s31_device, "pc80s31", "NEC PC-80S31 Mini Disk Unit I/F") -DEFINE_DEVICE_TYPE(PC80S31K, pc80s31k_device, "pc80s31k", "NEC PC-80S31K Mini Disk Unit I/F") - - -//************************************************************************** -// LIVE DEVICE -//************************************************************************** - - -//------------------------------------------------- -// pc80s31_device - constructor -//------------------------------------------------- - - -pc80s31_device::pc80s31_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) - : device_t(mconfig, type, tag, owner, clock) - , m_fdc(*this, "fdc") - , m_floppy(*this, "fdc:%u", 0U) - , m_fdc_cpu(*this, "fdc_cpu") - , m_fdc_rom(*this, "fdc_rom") - , m_ppi_host(*this, "ppi_host") - , m_ppi_fdc(*this, "ppi_fdc") - , m_latch(*this, "latch_%u", 0U) -{ -} - - -pc80s31_device::pc80s31_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : pc80s31_device(mconfig, PC80S31, tag, owner, clock) -{ - -} - -ROM_START( pc80s31 ) - // TODO: exact identification of these - ROM_REGION( 0x2000, "fdc_rom", ROMREGION_ERASEFF ) - ROM_SYSTEM_BIOS( 0, "disk", "disk BIOS" ) - ROMX_LOAD( "disk.rom", 0x0000, 0x0800, CRC(2158d307) SHA1(bb7103a0818850a039c67ff666a31ce49a8d516f), ROM_BIOS(0) ) - ROM_SYSTEM_BIOS( 1, "mk2fr", "mkIIFR disk BIOS" ) - ROMX_LOAD( "mk2fr_disk.rom", 0x0000, 0x0800, CRC(2163b304) SHA1(80da2dee49d4307f00895a129a5cfeff00cf5321), ROM_BIOS(1) ) - - ROM_FILL( 0x7df, 1, 0x00 ) - ROM_FILL( 0x7e0, 1, 0x00 ) -ROM_END - -const tiny_rom_entry *pc80s31_device::device_rom_region() const -{ - return ROM_NAME( pc80s31 ); -} - -//------------------------------------------------- -// device_add_mconfig - device-specific machine -// configuration addiitons -//------------------------------------------------- - -void pc80s31_device::host_map(address_map &map) -{ - map(0, 3).rw(m_ppi_host, FUNC(i8255_device::read), FUNC(i8255_device::write)); -} - -void pc80s31_device::fdc_map(address_map &map) -{ - map(0x0000, 0x1fff).rom().region("fdc_rom", 0); - map(0x4000, 0x7fff).ram(); -} - -void pc80s31_device::fdc_io(address_map &map) -{ - map.unmap_value_high(); - map.global_mask(0xff); -// map(0x09, 0x09).r accessed by filemst (pc8801), cfr. notes - -// map(0xf0, 0xf0).w(FUNC(pc8801_state::fdc_irq_vector_w)); // Interrupt Opcode Port -// map(0xf4, 0xf4).w(FUNC(pc8801_state::fdc_drive_mode_w)); // Drive mode, 2d, 2dd, 2hd -// map(0xf6, 0xf6).nopw(); // printer related - map(0xf7, 0xf7).nopw(); // printer port output - map(0xf8, 0xf8).rw(FUNC(pc80s31_device::terminal_count_r), FUNC(pc80s31_device::motor_control_w)); - map(0xfa, 0xfb).m(m_fdc, FUNC(upd765a_device::map)); - map(0xfc, 0xff).rw(m_ppi_fdc, FUNC(i8255_device::read), FUNC(i8255_device::write)); -} - -static void pc88_floppies(device_slot_interface &device) -{ - // TODO: definitely not correct for base device - device.option_add("525hd", FLOPPY_525_HD); -} - -IRQ_CALLBACK_MEMBER(pc80s31_device::irq_cb) -{ - return m_irq_vector; -} - -void pc80s31_device::device_add_mconfig(machine_config &config) -{ - constexpr XTAL fdc_xtal = XTAL(4'000'000); - Z80(config, m_fdc_cpu, fdc_xtal); - m_fdc_cpu->set_addrmap(AS_PROGRAM, &pc80s31_device::fdc_map); - m_fdc_cpu->set_addrmap(AS_IO, &pc80s31_device::fdc_io); - m_fdc_cpu->set_irq_acknowledge_callback(FUNC(pc80s31_device::irq_cb)); - - UPD765A(config, m_fdc, XTAL(4'000'000), true, true); - m_fdc->intrq_wr_callback().set_inputline(m_fdc_cpu, INPUT_LINE_IRQ0); - - for (auto &floppy : m_floppy) - { - FLOPPY_CONNECTOR(config, floppy, pc88_floppies, "525hd", floppy_image_device::default_mfm_floppy_formats); - floppy->enable_sound(true); - } - - for (auto &latch : m_latch) - GENERIC_LATCH_8(config, latch); - - I8255A(config, m_ppi_host); - m_ppi_host->in_pa_callback().set(FUNC(pc80s31_device::latch_r<0>)); - m_ppi_host->out_pa_callback().set(FUNC(pc80s31_device::latch_w<1>)); - m_ppi_host->in_pb_callback().set(FUNC(pc80s31_device::latch_r<2>)); - m_ppi_host->out_pb_callback().set(FUNC(pc80s31_device::latch_w<3>)); - m_ppi_host->in_pc_callback().set(FUNC(pc80s31_device::latch_r<4>)); - m_ppi_host->out_pc_callback().set(FUNC(pc80s31_device::latch_w<5>)); - - // 8255AC-2 - I8255A(config, m_ppi_fdc); - m_ppi_fdc->in_pa_callback().set(FUNC(pc80s31_device::latch_r<3>)); - m_ppi_fdc->out_pa_callback().set(FUNC(pc80s31_device::latch_w<2>)); - m_ppi_fdc->in_pb_callback().set(FUNC(pc80s31_device::latch_r<1>)); - m_ppi_fdc->out_pb_callback().set(FUNC(pc80s31_device::latch_w<0>)); - m_ppi_fdc->in_pc_callback().set(FUNC(pc80s31_device::latch_r<5>)); - m_ppi_fdc->out_pc_callback().set(FUNC(pc80s31_device::latch_w<4>)); -} - -//------------------------------------------------- -// device_timer - device-specific timers -//------------------------------------------------- - -void pc80s31_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) -{ - assert(id == 0); - - m_fdc->tc_w(false); - - // several games tries to scan invalid IDs from their structures, if this hits then - // it's possibly an attempt to scan a missing sector from the floppy structure. - // cfr. acrojet: the third read data command issued tries to access a CHRN of (0, 0, 16, 256) - // and checks at PC=500B if any of these status flags are satisfied: - // ST0 & 0xdf - // ST1 & 0xff - // ST2 & 0x73 - // Data doesn't matter, it also seems to have some activity to the printer port - // (debugging left on?) - if ((u8)m_fdc_cpu->state_int(Z80_HALT) == 1) - { - logerror("%s: attempt to trigger TC while in HALT state (read ID copy protection warning)\n", machine().describe_context()); -// throw emu_fatalerror("copy protection hit"); - } -} - -//------------------------------------------------- -// device_start - device-specific startup -//------------------------------------------------- - -void pc80s31_device::device_start() -{ - m_tc_zero_timer = timer_alloc(0); - - save_item(NAME(m_irq_vector)); -} - -//------------------------------------------------- -// device_reset - device-specific reset -//------------------------------------------------- - - -void pc80s31_device::device_reset() -{ - m_floppy[0]->get_device()->set_rpm(300); - m_floppy[1]->get_device()->set_rpm(300); - m_fdc->set_rate(250000); - - // TODO: doesn't seem to work for devices? - m_fdc_cpu->set_input_line_vector(0, 0); - m_irq_vector = 0; - - m_tc_zero_timer->adjust(attotime::never); -} - - -//************************************************************************** -// READ/WRITE HANDLERS -//************************************************************************** - -// Comms are simple dual port connected in cross fashion. -// Even at "perfect" interleave tho we need to mailbox the connections. -// - barbatus will hang at Artec logo the first time around (works if you soft reset); -template <unsigned N> u8 pc80s31_device::latch_r() -{ - const int port_mask = N & 4 ? 0x0f : 0xff; -// machine().scheduler().synchronize(); - return m_latch[N]->read() & port_mask; -} - -template <unsigned N> void pc80s31_device::latch_w(u8 data) -{ - const int lower_nibble = N & 4; -// machine().scheduler().synchronize(); - if (lower_nibble) - { - LOG("%s: %s port C write %02x (ATN=%d DAC=%d RFD=%d DAV=%d)\n" - , N & 1 ? "host" : "fdc" - , machine().describe_context() - , data - , BIT(data, 7) - , BIT(data, 6) - , BIT(data, 5) - , BIT(data, 4) - ); - } - return m_latch[N]->write(data >> lower_nibble); -} - -u8 pc80s31_device::terminal_count_r(address_space &space) -{ - if (!machine().side_effects_disabled()) - { - m_fdc->tc_w(true); - // TODO: accurate time of this going off - m_tc_zero_timer->reset(); - m_tc_zero_timer->adjust(attotime::from_usec(50)); - } - // value is meaningless (never readback) - // TODO: verify this being 0xff or open bus - return space.unmap(); -} - -void pc80s31_device::motor_control_w(uint8_t data) -{ - // FIXME: on pc80s31k device (particularly on later releases) this stays always on - // babylon: just spins indefinitely at PC=6d8 (using the internal routines), - // waiting for DAV or ATN being on. Never hits the port until a flag is issued. - // prajator: on idle times it spins at PC=7060, waiting for ATN and keep issuing a 0xff here. - // valis2: calls PC=7009 subroutine for idle, waits for ATN on. - // It eventually writes a 0 here, not before an extremely long time - // (~10000 frames!) - m_floppy[0]->get_device()->mon_w(!(data & 1)); - m_floppy[1]->get_device()->mon_w(!(data & 2)); - - // TODO: according to docs a value of 0x07 enables precompensation to tracks 0-19, 0xf enables it on 20-39 -} - -//************************************************************************** -// -// PC80S31K device overrides -// -//************************************************************************** - -pc80s31k_device::pc80s31k_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : pc80s31_device(mconfig, PC80S31K, tag, owner, clock) -{ - -} - -ROM_START( pc80s31k ) - // TODO: exact identification of these - ROM_REGION( 0x2000, "fdc_rom", ROMREGION_ERASEFF ) - ROM_SYSTEM_BIOS( 0, "ma", "MA disk BIOS") - ROMX_LOAD( "ma_disk.rom", 0x0000, 0x2000, CRC(a222ecf0) SHA1(79e9c0786a14142f7a83690bf41fb4f60c5c1004), ROM_BIOS(0) ) - ROM_SYSTEM_BIOS( 1, "mk2mr", "mkIIMR disk BIOS" ) - ROMX_LOAD( "m2mr_disk.rom", 0x0000, 0x2000, CRC(2447516b) SHA1(1492116f15c426f9796dc2bb6fcccf2656c0ca75), ROM_BIOS(1) ) - ROM_SYSTEM_BIOS( 2, "mh", "MH disk BIOS" ) - ROMX_LOAD( "mh_disk.rom", 0x0000, 0x2000, CRC(a222ecf0) SHA1(79e9c0786a14142f7a83690bf41fb4f60c5c1004), ROM_BIOS(2) ) - // TODO: this may belong to PC-80S32 - ROM_SYSTEM_BIOS( 3, "88va", "PC88VA disk BIOS") - ROMX_LOAD( "vasubsys.rom", 0x0000, 0x2000, CRC(08962850) SHA1(a9375aa480f85e1422a0e1385acb0ea170c5c2e0), ROM_BIOS(3) ) -ROM_END - -const tiny_rom_entry *pc80s31k_device::device_rom_region() const -{ - return ROM_NAME( pc80s31k ); -} - -void pc80s31k_device::drive_mode_w(uint8_t data) -{ - // TODO: fix implementation - // anything that isn't a 2D doesn't really set proper parameters in here - logerror("FDC drive mode %02x\n", data); - m_floppy[0]->get_device()->set_rpm(BIT(data, 0) ? 360 : 300); - m_floppy[1]->get_device()->set_rpm(BIT(data, 1) ? 360 : 300); - - m_fdc->set_rate(BIT(data, 5) ? 500000 : 250000); -} - -void pc80s31k_device::fdc_io(address_map &map) -{ - pc80s31_device::fdc_io(map); - - map(0xf0, 0xf0).lw8(NAME([this] (u8 data) { m_irq_vector = data; })); - map(0xf4, 0xf4).w(FUNC(pc80s31k_device::drive_mode_w)); -} |