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-rw-r--r--src/mess/machine/cuda.c567
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diff --git a/src/mess/machine/cuda.c b/src/mess/machine/cuda.c
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-// license:BSD-3-Clause
-// copyright-holders:R. Belmont
-/*
- Apple "Cuda" ADB/system controller MCU
- Emulation by R. Belmont
-
- Port definitions, primarily from the schematics.
-
- Port A:
-
- x------- O ADB data line out
- -x------ I ADB data line in
- --x----- I "1" for passive or soft power, "off sense" for secure
- ---x---- O DFAC latch
- ----x--- O "Fast Reset"
- -----x-- I Keyboard power switch
- ------x- I 1 for secure or passive power, chassis switch for soft
- -------x ? 1 for passive, power supply control on secure/soft power, input on secure/soft also?
-
- Port B:
-
- x------- O DFAC bit clock
- -x------ B DFAC data I/O (used in both directions)
- --x----- B VIA shift register data (used in both directions)
- ---x---- O VIA clock
- ----x--- I VIA TIP
- -----x-- I VIA BYTEACK
- ------x- O VIA TREQ
- -------x I +5v sense
-
- Port C:
- x--- O 680x0 reset
- -x-- ? 680x0 IPL 2 (used in both directions)
- --x- ? IPL 1/pull up for passive power, trickle sense for soft and secure
- ---x ? IPL 0 for passive power, pull-up for soft power, file server switch for secure power
-*/
-
-
-//#define CUDA_SUPER_VERBOSE
-
-#include "emu.h"
-#include "cuda.h"
-#include "cpu/m6805/m6805.h"
-#include "sound/asc.h"
-#include "includes/mac.h"
-
-//**************************************************************************
-// MACROS / CONSTANTS
-//**************************************************************************
-
-#define CUDA_CPU_TAG "cuda"
-
-//**************************************************************************
-// DEVICE DEFINITIONS
-//**************************************************************************
-
-const device_type CUDA = &device_creator<cuda_device>;
-
-ROM_START( cuda )
- ROM_REGION(0x4400, CUDA_CPU_TAG, 0)
- ROM_LOAD( "341s0060.bin", 0x1100, 0x1100, CRC(0f5e7b4a) SHA1(972b3778146d9787b18c3a9874d505cf606b3e15) )
- ROM_LOAD( "341s0788.bin", 0x2200, 0x1100, CRC(df6e1b43) SHA1(ec23cc6214c472d61b98964928c40589517a3172) )
- ROM_LOAD( "341s0417.bin", 0x3300, 0x1100, CRC(571f24c9) SHA1(a2ae12492389a00e5f4b1ef19b267d6f3a8eadc3) )
-ROM_END
-
-//-------------------------------------------------
-// ADDRESS_MAP
-//-------------------------------------------------
-
-static ADDRESS_MAP_START( cuda_map, AS_PROGRAM, 8, cuda_device )
- AM_RANGE(0x0000, 0x0002) AM_READWRITE(ports_r, ports_w)
- AM_RANGE(0x0004, 0x0006) AM_READWRITE(ddr_r, ddr_w)
- AM_RANGE(0x0007, 0x0007) AM_READWRITE(pll_r, pll_w)
- AM_RANGE(0x0008, 0x0008) AM_READWRITE(timer_ctrl_r, timer_ctrl_w)
- AM_RANGE(0x0009, 0x0009) AM_READWRITE(timer_counter_r, timer_counter_w)
- AM_RANGE(0x0012, 0x0012) AM_READWRITE(onesec_r, onesec_w)
- AM_RANGE(0x0090, 0x00ff) AM_RAM // work RAM and stack
- AM_RANGE(0x0100, 0x01ff) AM_READWRITE(pram_r, pram_w)
- AM_RANGE(0x0f00, 0x1fff) AM_ROM AM_REGION(CUDA_CPU_TAG, 0)
-ADDRESS_MAP_END
-
-//-------------------------------------------------
-// MACHINE_CONFIG
-//-------------------------------------------------
-
-static MACHINE_CONFIG_FRAGMENT( cuda )
- MCFG_CPU_ADD(CUDA_CPU_TAG, M68HC05EG, XTAL_32_768kHz*192) // 32.768 kHz input clock, can be PLL'ed to x128 = 4.1 MHz under s/w control
- MCFG_CPU_PROGRAM_MAP(cuda_map)
-MACHINE_CONFIG_END
-
-
-//-------------------------------------------------
-// machine_config_additions - device-specific
-// machine configurations
-//-------------------------------------------------
-
-machine_config_constructor cuda_device::device_mconfig_additions() const
-{
- return MACHINE_CONFIG_NAME( cuda );
-}
-
-const rom_entry *cuda_device::device_rom_region() const
-{
- return ROM_NAME( cuda );
-}
-
-//**************************************************************************
-// LIVE DEVICE
-//**************************************************************************
-
-void cuda_device::send_port(address_space &space, UINT8 offset, UINT8 data)
-{
-// printf("PORT %c write %02x (DDR = %02x) (PC=%x)\n", 'A' + offset, data, ddrs[offset], m_maincpu->pc());
-
- switch (offset)
- {
- case 0: // port A
-/* printf("PORT A ADB:%d DFAC:%d PFW:%d\n",
- (data & 0x80) ? 1 : 0,
- (data & 0x10) ? 1 : 0,
- (data & 0x01) ? 1 : 0);*/
-
- if ((data & 0x80) != last_adb)
- {
-/* if (data & 0x80)
- {
- printf("CU ADB: 1->0 time %lld\n", machine().time().as_ticks(1000000) - last_adb_time);
- }
- else
- {
- printf("CU ADB: 0->1 time %lld\n", machine().time().as_ticks(1000000) - last_adb_time);
- }*/
-
- // allow the linechange handler to override us
- adb_in = (data & 0x80) ? true : false;
-
- m_adb_dtime = (int)(machine().time().as_ticks(1000000) - last_adb_time);
- write_linechange(((data & 0x80) >> 7) ^ 1);
-
- last_adb = data & 0x80;
- last_adb_time = machine().time().as_ticks(1000000);
- }
- break;
-
- case 1: // port B
- {
- if (treq != ((data>>1)&1))
- {
- #ifdef CUDA_SUPER_VERBOSE
- printf("CU-> TREQ: %d (PC=%x)\n", (data>>1)&1, m_maincpu->pc());
- #endif
- treq = (data>>1) & 1;
- }
- if (via_data != ((data>>5)&1))
- {
- #ifdef CUDA_SUPER_VERBOSE
- printf("CU-> VIA_DATA: %d (PC=%x)\n", (data>>5)&1, m_maincpu->pc());
- #endif
- via_data = (data>>5) & 1;
- write_via_data(via_data);
- }
- if (via_clock != ((data>>4)&1))
- {
- #ifdef CUDA_SUPER_VERBOSE
- printf("CU-> VIA_CLOCK: %d (PC=%x)\n", ((data>>4)&1)^1, m_maincpu->pc());
- #endif
- via_clock = (data>>4) & 1;
- write_via_clock(via_clock);
- }
- }
- break;
-
- case 2: // port C
- if ((data & 8) != reset_line)
- {
- #ifdef CUDA_SUPER_VERBOSE
- printf("680x0 reset: %d -> %d (PC=%x)\n", (ports[2] & 8)>>3, (data & 8)>>3, m_maincpu->pc());
- #endif
- reset_line = (data & 8);
- // falling edge, should reset the machine too
- if ((ports[2] & 8) && !(data&8))
- {
- write_reset(ASSERT_LINE);
- write_reset(CLEAR_LINE);
-
- // if PRAM's waiting to be loaded, transfer it now
- if (!pram_loaded)
- {
-// memcpy(pram, disk_pram, 0x100);
- pram_loaded = true;
- }
- }
- }
- break;
- }
-}
-
-READ8_MEMBER( cuda_device::ddr_r )
-{
- return ddrs[offset];
-}
-
-WRITE8_MEMBER( cuda_device::ddr_w )
-{
-// printf("%02x to PORT %c DDR (PC=%x)\n", data, 'A' + offset, m_maincpu->pc());
-
- send_port(space, offset, ports[offset] & data);
-
- ddrs[offset] = data;
-}
-
-READ8_MEMBER( cuda_device::ports_r )
-{
- UINT8 incoming = 0;
-
- switch (offset)
- {
- case 0: // port A
- if (cuda_controls_power)
- {
- incoming = 0x20; // pull up + chassis switch (which is 0 = on)
- }
- else
- {
- incoming = 0x02 | 0x01; // pull-up + PFW
- }
-
- if (adb_in)
- {
- incoming |= 0x40;
- }
- break;
-
- case 1: // port B
-// printf("Read: byteack %d tip %d via_data %d\n", byteack, tip, via_data);
- incoming |= 0x01; // +5v sense
- incoming |= byteack<<2;
- incoming |= tip<<3;
- incoming |= via_data<<5;
- incoming |= 0xc0; // show DFAC lines high
- break;
-
- case 2: // port C
- if (cuda_controls_power)
- {
- incoming = 0x02 | 0x01; // soft power: trickle sense + pull-up
- }
- else
- {
- incoming = 0x02 | 0x01; // secure power: pull-up + file server
- }
- break;
- }
-
- // apply data direction registers
- incoming &= (ddrs[offset] ^ 0xff);
- // add in ddr-masked version of port writes
- incoming |= (ports[offset] & ddrs[offset]);
-
- // HACK: don't know how this works on h/w...
- if (!offset)
- {
- incoming |= 0x01;
- }
-
-// printf("PORT %c read = %02x (DDR = %02x latch = %02x) (PC=%x)\n", 'A' + offset, ports[offset], ddrs[offset], ports[offset], m_maincpu->pc());
-
- return incoming;
-}
-
-WRITE8_MEMBER( cuda_device::ports_w )
-{
- send_port(space, offset, data);
-
- ports[offset] = data;
-}
-
-READ8_MEMBER( cuda_device::pll_r )
-{
- return pll_ctrl;
-}
-
-WRITE8_MEMBER( cuda_device::pll_w )
-{
- #ifdef CUDA_SUPER_VERBOSE
- if (pll_ctrl != data)
- {
- static const int clocks[4] = { 524288, 1048576, 2097152, 4194304 };
- printf("PLL ctrl: clock %d TCS:%d BCS:%d AUTO:%d BWC:%d PLLON:%d (PC=%x)\n", clocks[data&3],
- (data & 0x80) ? 1 : 0,
- (data & 0x40) ? 1 : 0,
- (data & 0x20) ? 1 : 0,
- (data & 0x10) ? 1 : 0,
- (data & 0x08) ? 1 : 0, m_maincpu->pc());
- }
- #endif
- pll_ctrl = data;
-}
-
-READ8_MEMBER( cuda_device::timer_ctrl_r )
-{
- return timer_ctrl;
-}
-
-WRITE8_MEMBER( cuda_device::timer_ctrl_w )
-{
- static const attotime rates[4][5] =
- {
- { attotime::from_seconds(1), attotime::from_msec(31.3f), attotime::from_msec(15.6f), attotime::from_msec(7.8f), attotime::from_msec(3.9f) },
- { attotime::from_seconds(2), attotime::from_msec(62.5f), attotime::from_msec(31.3f), attotime::from_msec(15.6f), attotime::from_msec(7.8f) },
- { attotime::from_seconds(4), attotime::from_msec(125.0f), attotime::from_msec(62.5f), attotime::from_msec(31.3f), attotime::from_msec(15.6f) },
- { attotime::from_seconds(8), attotime::from_msec(250.0f), attotime::from_msec(125.1f), attotime::from_msec(62.5f), attotime::from_msec(31.3f) },
- };
-
-// printf("%02x to timer control (PC=%x)\n", data, m_maincpu->pc());
-
- if (data & 0x50)
- {
- m_prog_timer->adjust(rates[data & 3][(pll_ctrl&3)+1], 1, rates[data&3][(pll_ctrl&3)+1]);
- ripple_counter = timer_counter;
- }
- else
- {
- m_prog_timer->adjust(attotime::never);
- }
-
- if ((timer_ctrl & 0x80) && !(data & 0x80))
- {
- m_maincpu->set_input_line(M68HC05EG_INT_TIMER, CLEAR_LINE);
- timer_ctrl &= ~0x80;
- }
- else if ((timer_ctrl & 0x40) && !(data & 0x40))
- {
- m_maincpu->set_input_line(M68HC05EG_INT_TIMER, CLEAR_LINE);
- timer_ctrl &= ~0x40;
- }
-
- timer_ctrl &= 0xc0;
- timer_ctrl |= (data & ~0xc0);
-}
-
-READ8_MEMBER( cuda_device::timer_counter_r )
-{
- return timer_counter;
-}
-
-WRITE8_MEMBER( cuda_device::timer_counter_w )
-{
-// printf("%02x to timer counter (PC=%x)\n", data, m_maincpu->pc());
- timer_counter = data;
- ripple_counter = timer_counter;
-}
-
-READ8_MEMBER( cuda_device::onesec_r )
-{
- return onesec;
-}
-
-WRITE8_MEMBER( cuda_device::onesec_w )
-{
- m_timer->adjust(attotime::from_seconds(1), 0, attotime::from_seconds(1));
-
- if ((onesec & 0x40) && !(data & 0x40))
- {
- m_maincpu->set_input_line(M68HC05EG_INT_CPI, CLEAR_LINE);
- }
-
- onesec = data;
-}
-
-READ8_MEMBER( cuda_device::pram_r )
-{
- return pram[offset];
-}
-
-WRITE8_MEMBER( cuda_device::pram_w )
-{
- pram[offset] = data;
-}
-
-//-------------------------------------------------
-// cuda_device - constructor
-//-------------------------------------------------
-
-cuda_device::cuda_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
- : device_t(mconfig, CUDA, "Apple Cuda", tag, owner, clock, "cuda", __FILE__),
- device_nvram_interface(mconfig, *this),
- write_reset(*this),
- write_linechange(*this),
- write_via_clock(*this),
- write_via_data(*this),
- m_maincpu(*this, CUDA_CPU_TAG)
-{
-}
-
-//-------------------------------------------------
-// static_set_type - configuration helper to set
-// the chip type
-//-------------------------------------------------
-
-void cuda_device::static_set_type(device_t &device, int type)
-{
- cuda_device &cuda = downcast<cuda_device &>(device);
- cuda.rom_offset = type;
-}
-
-//-------------------------------------------------
-// device_start - device-specific startup
-//-------------------------------------------------
-
-void cuda_device::device_start()
-{
- write_reset.resolve_safe();
- write_linechange.resolve_safe();
- write_via_clock.resolve_safe();
- write_via_data.resolve_safe();
-
- m_timer = timer_alloc(0, NULL);
- m_prog_timer = timer_alloc(1, NULL);
- save_item(NAME(ddrs[0]));
- save_item(NAME(ddrs[1]));
- save_item(NAME(ddrs[2]));
- save_item(NAME(ports[0]));
- save_item(NAME(ports[1]));
- save_item(NAME(ports[2]));
- save_item(NAME(pll_ctrl));
- save_item(NAME(timer_ctrl));
- save_item(NAME(timer_counter));
- save_item(NAME(ripple_counter));
- save_item(NAME(onesec));
- save_item(NAME(treq));
- save_item(NAME(byteack));
- save_item(NAME(tip));
- save_item(NAME(via_data));
- save_item(NAME(via_clock));
- save_item(NAME(adb_in));
- save_item(NAME(reset_line));
- save_item(NAME(m_adb_dtime));
- save_item(NAME(pram_loaded));
- save_item(NAME(pram));
- save_item(NAME(disk_pram));
-
- UINT8 *rom = device().machine().root_device().memregion(device().subtag(CUDA_CPU_TAG).c_str())->base();
-
- if (rom)
- {
- memcpy(rom, rom+rom_offset, 0x1100);
- }
-}
-
-
-//-------------------------------------------------
-// device_reset - device-specific reset
-//-------------------------------------------------
-
-void cuda_device::device_reset()
-{
- ddrs[0] = ddrs[1] = ddrs[2] = 0;
- ports[0] = ports[1] = ports[2] = 0;
-
- m_timer->adjust(attotime::never);
- m_prog_timer->adjust(attotime::never);
-
- cuda_controls_power = false; // set to hard power control
- adb_in = true; // line is pulled up to +5v, so nothing plugged in would read as "1"
- reset_line = 0;
- tip = 0;
- treq = 0;
- byteack = 0;
- via_data = 0;
- via_clock = 0;
- pll_ctrl = 0;
- timer_ctrl = 0;
- timer_counter = 32;
- last_adb_time = m_maincpu->total_cycles();
- onesec = 0;
- last_adb = 0;
-}
-
-void cuda_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
-{
- if (id == 0)
- {
- onesec |= 0x40;
-
- if (onesec & 0x10)
- {
- m_maincpu->set_input_line(M68HC05EG_INT_CPI, ASSERT_LINE);
- }
- }
- else
- {
- timer_ctrl |= 0x80;
-
- if (timer_ctrl & 0x20)
- {
- m_maincpu->set_input_line(M68HC05EG_INT_TIMER, ASSERT_LINE);
- }
-
- ripple_counter--;
- if (ripple_counter <= 0)
- {
- timer_ctrl |= 0x40;
-
- ripple_counter = timer_counter;
-
- if (timer_ctrl & 0x10)
- {
- m_maincpu->set_input_line(M68HC05EG_INT_TIMER, ASSERT_LINE);
- }
- }
- }
-}
-
-// the 6805 program clears PRAM on startup (on h/w it's always running once a battery is inserted)
-// we deal with that by loading pram from disk to a secondary buffer and then slapping it into "live"
-// once the cuda reboots the 68k
-void cuda_device::nvram_default()
-{
- memset(pram, 0, 0x100);
- memset(disk_pram, 0, 0x100);
-
- pram[0x1] = 0x10;
- pram[0x2] = 0x4f;
- pram[0x3] = 0x48;
- pram[0x8] = 0x13;
- pram[0x9] = 0x88;
- pram[0xb] = 0xcc;
- pram[0xc] = 0x4e;
- pram[0xd] = 0x75;
- pram[0xe] = 0x4d;
- pram[0xf] = 0x63;
- pram[0x10] = 0xa8;
- pram[0x14] = 0xcc;
- pram[0x15] = 0x0a;
- pram[0x16] = 0xcc;
- pram[0x17] = 0x0a;
- pram[0x1d] = 0x02;
- pram[0x1e] = 0x63;
- pram[0x4a] = 0x90;
- pram[0x4b] = 0xc7;
- pram[0x57] = 0x29;
- pram[0x58] = 0x80;
- pram[0x59] = 0x68;
- pram[0x5a] = 0x80;
- pram[0x5b] = 0x80;
- pram[0x6f] = 0x28;
- pram[0x77] = 0x01;
- pram[0x78] = 0xff;
- pram[0x79] = 0xff;
- pram[0x7a] = 0xff;
- pram[0x7b] = 0xdf;
- pram[0xb8] = 0x35;
- pram[0xb9] = 0x80;
- pram_loaded = false;
-}
-
-void cuda_device::nvram_read(emu_file &file)
-{
- file.read(disk_pram, 0x100);
- pram_loaded = false;
-}
-
-void cuda_device::nvram_write(emu_file &file)
-{
- file.write(pram, 0x100);
-}