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Diffstat (limited to 'src/mess/machine/cuda.c')
-rw-r--r-- | src/mess/machine/cuda.c | 567 |
1 files changed, 0 insertions, 567 deletions
diff --git a/src/mess/machine/cuda.c b/src/mess/machine/cuda.c deleted file mode 100644 index 5c4964653b1..00000000000 --- a/src/mess/machine/cuda.c +++ /dev/null @@ -1,567 +0,0 @@ -// 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); -} |