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Diffstat (limited to 'src/mame/machine/apple3.cpp')
-rw-r--r-- | src/mame/machine/apple3.cpp | 1399 |
1 files changed, 0 insertions, 1399 deletions
diff --git a/src/mame/machine/apple3.cpp b/src/mame/machine/apple3.cpp deleted file mode 100644 index a875d6dfc9e..00000000000 --- a/src/mame/machine/apple3.cpp +++ /dev/null @@ -1,1399 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Nathan Woods,R. Belmont -/*************************************************************************** - - machine/apple3.c - - Apple /// - - VIA #0 (D VIA) - CA1: IRQ from the MM58167 RTC - CA2: 1 if key pressed, 0 otherwise - CB1/CB2: connected to VBL - - Port A: Environment register (all bits out) - bit 7: 1 for 1 MHz, 0 for 2 MHz - bit 6: 1 for I/O at C000-CFFF - bit 5: 1 to enable video - bit 4: 1 to enable NMI/Reset - bit 3: 1 to write-protect RAM in system bank C000-FFFF - bit 2: 1 to force primary stack at 0100-01FF - bit 1: 1 for primary ROM, 0 for secondary (Apple III doesn't have a secondary ROM, so this should always be '1' when bit 0 is) - bit 0: 1 to enable ROM in F000-FFFF - - Port B: Zero page high 8 address bits, also MM58167 RTC register select (all bits out) - - VIA #1 (E VIA) - CA1: OR of all 4 slots' IRQ status - CA2: SW1 (Open Apple key?) - CB1: SW3/SCO - CB2: SER - - Port A: - bits 0-2: bank select for $2000-$9FFF range - bit 3: n/c - bit 4: slot 4 IRQ (in) - bit 5: slot 3 IRQ (in) - bit 6: Apple II mode trap output (out) - bit 7: IRQ status (in) (0 = IRQ, 1 = no IRQ) - - Port B: - bits 0-5: 6-bit audio DAC output - bit 6: screen blank - bit 7: OR of NMI from slots - -***************************************************************************/ - -#include "emu.h" -#include "includes/apple3.h" - -#define LOG_MEMORY 0 -#define LOG_INDXADDR 0 - -#define ENV_SLOWSPEED (0x80) -#define ENV_IOENABLE (0x40) -#define ENV_VIDENABLE (0x20) -#define ENV_NMIENABLE (0x10) -#define ENV_WRITEPROT (0x08) -#define ENV_STACK1XX (0x04) -#define ENV_PRIMARYROM (0x02) -#define ENV_ROMENABLE (0x01) - -// 14M / 14, but with every 65th cycle stretched which we cannot reasonably emulate -// 2 MHz mode probably has every 33rd cycle stretched but this is currently unproven. -static constexpr XTAL APPLE2_CLOCK(1'021'800); - -uint8_t apple3_state::apple3_c0xx_r(offs_t offset) -{ - uint8_t result = 0xFF; - device_a2bus_card_interface *slotdevice; - - switch(offset) - { - /* keystrobe */ - case 0x00: case 0x01: case 0x02: case 0x03: - case 0x04: case 0x05: case 0x06: case 0x07: - result = (m_transchar & 0x7f) | m_strobe; - break; - - /* modifier keys */ - case 0x08: case 0x09: case 0x0A: case 0x0B: - case 0x0C: case 0x0D: case 0x0E: case 0x0F: - { - uint8_t tmp = m_kbspecial->read(); - - result = 0x7c | (m_transchar & 0x80); - - if (m_strobe) - { - result |= 1; - } - - if (tmp & 0x06) - { - result |= 0x02; - } - if (tmp & 0x08) - { - result &= ~0x04; - } - if (tmp & 0x01) - { - result &= ~0x08; - } - if (tmp & 0x10) - { - result &= ~0x10; - } - if (tmp & 0x20) - { - result &= ~0x20; - } - } -// printf("modifier = %02x\n", result); - break; - - case 0x10: case 0x11: case 0x12: case 0x13: - case 0x14: case 0x15: case 0x16: case 0x17: - case 0x18: case 0x19: case 0x1A: case 0x1B: - case 0x1C: case 0x1D: case 0x1E: case 0x1F: - m_strobe = 0; - break; - - case 0x20: case 0x21: case 0x22: case 0x23: - case 0x24: case 0x25: case 0x26: case 0x27: - case 0x28: case 0x29: case 0x2A: case 0x2B: - case 0x2C: case 0x2D: case 0x2E: case 0x2F: - if (!machine().side_effects_disabled()) - { - m_cnxx_slot = -1; - } - break; - - case 0x30: case 0x31: case 0x32: case 0x33: - case 0x34: case 0x35: case 0x36: case 0x37: - case 0x38: case 0x39: case 0x3A: case 0x3B: - case 0x3C: case 0x3D: case 0x3E: case 0x3F: - m_bell_state ^= 1; - m_bell->write(m_bell_state); - break; - - case 0x40: case 0x41: case 0x42: case 0x43: - case 0x44: case 0x45: case 0x46: case 0x47: - case 0x48: case 0x49: case 0x4A: case 0x4B: - case 0x4C: case 0x4D: - m_c040_time = 200; - break; - - case 0x4E: case 0x4F: // character RAM enable/disable - break; - - case 0x50: case 0x51: case 0x52: case 0x53: - case 0x54: case 0x55: case 0x56: case 0x57: - m_screen->update_partial(m_screen->vpos()); - /* graphics softswitches */ - if (offset & 1) - m_flags |= 1 << ((offset - 0x50) / 2); - else - m_flags &= ~(1 << ((offset - 0x50) / 2)); - break; - - case 0x58: - case 0x59: - case 0x5a: - case 0x5b: - case 0x5c: - case 0x5d: - case 0x5e: - case 0x5f: - pdl_handler(offset); - break; - - case 0x60: // joystick switch 0 - case 0x68: - result = (m_joybuttons->read() & 1) ? 0x80 : 0x00; - break; - - case 0x61: // joystick switch 1 (margin switch for Silentype) - case 0x69: - result = (m_joybuttons->read() & 4) ? 0x80 : 0x00; - break; - - case 0x62: // joystick switch 2 - case 0x6a: - result = (m_joybuttons->read() & 2) ? 0x80 : 0x00; - break; - - case 0x63: // joystick switch 3 (serial clock for silentype) - case 0x6b: - result = (m_joybuttons->read() & 8) ? 0x80 : 0x00; - break; - - case 0x64: // slot 2 IRQ status (negative logic) - case 0x6c: - result = (m_a2bus->get_a2bus_irq_mask() & (1<<2)) ? 0 : 0x80; - break; - - case 0x65: // slot 1 IRQ status (negative logic) - case 0x6d: - result = (m_a2bus->get_a2bus_irq_mask() & (1<<1)) ? 0 : 0x80; - break; - - case 0x66: // paddle A/D conversion done (bit 7 = 1 while counting, 0 when done) - case 0x6e: - result = m_ramp_active ? 0x80 : 0x00; - break; - - case 0x70: case 0x71: case 0x72: case 0x73: - case 0x74: case 0x75: case 0x76: case 0x77: - case 0x78: case 0x79: case 0x7A: case 0x7B: - case 0x7C: case 0x7D: case 0x7E: case 0x7F: - result = m_rtc->read(m_via_0_b); - break; - - case 0x90: case 0x91: case 0x92: case 0x93: - case 0x94: case 0x95: case 0x96: case 0x97: - case 0x98: case 0x99: case 0x9a: case 0x9b: - case 0x9c: case 0x9d: case 0x9e: case 0x9f: - slotdevice = m_a2bus->get_a2bus_card(1); - if (slotdevice != nullptr) - { - result = slotdevice->read_c0nx(offset&0xf); - } - break; - - case 0xa0: case 0xa1: case 0xa2: case 0xa3: - case 0xa4: case 0xa5: case 0xa6: case 0xa7: - case 0xa8: case 0xa9: case 0xaa: case 0xab: - case 0xac: case 0xad: case 0xae: case 0xaf: - slotdevice = m_a2bus->get_a2bus_card(2); - if (slotdevice != nullptr) - { - result = slotdevice->read_c0nx(offset&0xf); - } - break; - - case 0xb0: case 0xb1: case 0xb2: case 0xb3: - case 0xb4: case 0xb5: case 0xb6: case 0xb7: - case 0xb8: case 0xb9: case 0xba: case 0xbb: - case 0xbc: case 0xbd: case 0xbe: case 0xbf: - slotdevice = m_a2bus->get_a2bus_card(3); - if (slotdevice != nullptr) - { - result = slotdevice->read_c0nx(offset&0xf); - } - break; - - case 0xc0: case 0xc1: case 0xc2: case 0xc3: - case 0xc4: case 0xc5: case 0xc6: case 0xc7: - case 0xc8: case 0xc9: case 0xca: case 0xcb: - case 0xcc: case 0xcd: case 0xce: case 0xcf: - slotdevice = m_a2bus->get_a2bus_card(4); - if (slotdevice != nullptr) - { - result = slotdevice->read_c0nx(offset&0xf); - } - break; - - case 0xd0: case 0xd1: case 0xd2: case 0xd3: - case 0xd4: case 0xd5: case 0xd6: case 0xd7: - /* external drive stuff */ - m_fdc->read_c0dx(offset&0xf); - result = 0x00; - break; - - case 0xd8: case 0xd9: - m_smoothscr = offset & 1; - break; - - case 0xda: -// printf("ENCWRT off\n"); - m_charwrt = false; - break; - - case 0xdb: - m_charwrt = true; -// printf("ENCWRT on (write_charmem (r))\n"); - break; - - case 0xdc: -// printf("ENCSEL off\n"); - break; - - case 0xdd: -// printf("ENCSEL on\n"); - break; - - case 0xde: -// printf("ENSIO off\n"); - break; - - case 0xdf: -// printf("ENSIO on\n"); - break; - - case 0xe0: case 0xe1: - result = m_fdc->read(offset&0xf); - m_va = offset & 1; - break; - - case 0xe2: case 0xe3: - result = m_fdc->read(offset&0xf); - m_vb = offset & 1; - break; - - case 0xe4: case 0xe5: - result = m_fdc->read(offset&0xf); - m_vc = offset & 1; - break; - - case 0xe6: case 0xe7: case 0xe8: case 0xe9: - case 0xea: case 0xeb: case 0xec: case 0xed: - case 0xee: case 0xef: - result = m_fdc->read(offset&0xf); - break; - - case 0xf0: - case 0xf1: - case 0xf2: - case 0xf3: - result = m_acia->read(offset & 0x03); - break; - } - return result; -} - - - -void apple3_state::apple3_c0xx_w(offs_t offset, uint8_t data) -{ - device_a2bus_card_interface *slotdevice; - - switch(offset) - { - case 0x10: case 0x11: case 0x12: case 0x13: - case 0x14: case 0x15: case 0x16: case 0x17: - case 0x18: case 0x19: case 0x1A: case 0x1B: - case 0x1C: case 0x1D: case 0x1E: case 0x1F: - m_strobe = 0; - break; - - case 0x20: case 0x21: case 0x22: case 0x23: - case 0x24: case 0x25: case 0x26: case 0x27: - case 0x28: case 0x29: case 0x2A: case 0x2B: - case 0x2C: case 0x2D: case 0x2E: case 0x2F: - m_cnxx_slot = -1; - break; - - case 0x30: case 0x31: case 0x32: case 0x33: - case 0x34: case 0x35: case 0x36: case 0x37: - case 0x38: case 0x39: case 0x3A: case 0x3B: - case 0x3C: case 0x3D: case 0x3E: case 0x3F: - m_bell_state ^= 1; - m_bell->write(m_bell_state); - break; - - case 0x40: case 0x41: case 0x42: case 0x43: - case 0x44: case 0x45: case 0x46: case 0x47: - case 0x48: case 0x49: case 0x4A: case 0x4B: - case 0x4C: case 0x4D: - m_c040_time = 200; - break; - - case 0x4E: case 0x4F: // character RAM disable/enable - break; - - case 0x50: case 0x51: case 0x52: case 0x53: - case 0x54: case 0x55: case 0x56: case 0x57: - m_screen->update_partial(m_screen->vpos()); - /* graphics softswitches */ - if (offset & 1) - m_flags |= 1 << ((offset - 0x50) / 2); - else - m_flags &= ~(1 << ((offset - 0x50) / 2)); - break; - - case 0x58: - case 0x59: - case 0x5a: - case 0x5b: - case 0x5c: - case 0x5d: - case 0x5e: - case 0x5f: - pdl_handler(offset); - break; - - case 0x70: case 0x71: case 0x72: case 0x73: - case 0x74: case 0x75: case 0x76: case 0x77: - case 0x78: case 0x79: case 0x7A: case 0x7B: - case 0x7C: case 0x7D: case 0x7E: case 0x7F: - m_rtc->write(m_via_0_b, data); - break; - - - case 0x90: case 0x91: case 0x92: case 0x93: - case 0x94: case 0x95: case 0x96: case 0x97: - case 0x98: case 0x99: case 0x9a: case 0x9b: - case 0x9c: case 0x9d: case 0x9e: case 0x9f: - slotdevice = m_a2bus->get_a2bus_card(1); - if (slotdevice != nullptr) - { - slotdevice->write_c0nx(offset&0xf, data); - } - break; - - case 0xa0: case 0xa1: case 0xa2: case 0xa3: - case 0xa4: case 0xa5: case 0xa6: case 0xa7: - case 0xa8: case 0xa9: case 0xaa: case 0xab: - case 0xac: case 0xad: case 0xae: case 0xaf: - slotdevice = m_a2bus->get_a2bus_card(2); - if (slotdevice != nullptr) - { - slotdevice->write_c0nx(offset&0xf, data); - } - break; - - case 0xb0: case 0xb1: case 0xb2: case 0xb3: - case 0xb4: case 0xb5: case 0xb6: case 0xb7: - case 0xb8: case 0xb9: case 0xba: case 0xbb: - case 0xbc: case 0xbd: case 0xbe: case 0xbf: - slotdevice = m_a2bus->get_a2bus_card(3); - if (slotdevice != nullptr) - { - slotdevice->write_c0nx(offset&0xf, data); - } - break; - - case 0xc0: case 0xc1: case 0xc2: case 0xc3: - case 0xc4: case 0xc5: case 0xc6: case 0xc7: - case 0xc8: case 0xc9: case 0xca: case 0xcb: - case 0xcc: case 0xcd: case 0xce: case 0xcf: - slotdevice = m_a2bus->get_a2bus_card(4); - if (slotdevice != nullptr) - { - slotdevice->write_c0nx(offset&0xf, data); - } - break; - - case 0xd0: case 0xd1: case 0xd2: case 0xd3: - case 0xd4: case 0xd5: case 0xd6: case 0xd7: - /* external drive stuff */ - m_fdc->write_c0dx(offset&0xf, data); - break; - - case 0xd8: case 0xd9: - m_smoothscr = offset & 1; - break; - - case 0xda: -// printf("ENCWRT off\n"); - m_charwrt = false; - break; - - case 0xdb: - m_charwrt = true; -// printf("ENCWRT on (write_charmem (w))\n"); - break; - - case 0xdc: -// printf("ENCSEL off\n"); - break; - - case 0xdd: -// printf("ENCSEL on\n"); - break; - - case 0xde: -// printf("ENSIO off\n"); - break; - - case 0xdf: -// printf("ENSIO on\n"); - break; - - case 0xe0: case 0xe1: case 0xe2: case 0xe3: - case 0xe4: case 0xe5: case 0xe6: case 0xe7: - case 0xe8: case 0xe9: case 0xea: case 0xeb: - case 0xec: case 0xed: case 0xee: case 0xef: - m_fdc->write(offset&0xf, data); - break; - - case 0xf0: - case 0xf1: - case 0xf2: - case 0xf3: - m_acia->write(offset & 0x03, data); - break; - } -} - -WRITE_LINE_MEMBER(apple3_state::vbl_w) -{ - // do the font upload at the end of VBL, not the start - if ((!state) && (m_charwrt)) - { - apple3_write_charmem(); - } -} - -uint8_t *apple3_state::apple3_bankaddr(uint16_t bank, offs_t offset) -{ - if (bank != (uint16_t) ~0) - { - bank %= m_ram->size() / 0x8000; - if ((bank + 1) == (m_ram->size() / 0x8000)) - bank = 0x02; - } - offset += ((offs_t) bank) * 0x8000; - offset %= m_ram->size(); - return &m_ram->pointer()[offset]; -} - -uint8_t *apple3_state::apple3_get_zpa_addr(offs_t offset) -{ - m_zpa = (((offs_t) m_via_0_b) * 0x100) + offset; - - if (m_via_0_b < 0x20) - return apple3_bankaddr(~0, m_zpa); - else if (m_via_0_b > 0x9F) - return apple3_bankaddr(~0, m_zpa - 0x8000); - else - return apple3_bankaddr(m_via_1_a, m_zpa - 0x2000); -} - -void apple3_state::apple3_update_memory() -{ - uint16_t bank; - uint8_t page; - - if (LOG_MEMORY) - { - logerror("apple3_update_memory(): via_0_b=0x%02x via_1_a=0x0x%02x\n", m_via_0_b, m_via_1_a); - } - - m_maincpu->set_unscaled_clock(((m_via_0_a & ENV_SLOWSPEED) ? APPLE2_CLOCK : (14.318181_MHz_XTAL / 7))); - - /* bank 2 (0100-01FF) */ - if (!(m_via_0_a & ENV_STACK1XX)) - { - if (m_via_0_b < 0x20) - { - bank = ~0; /* system bank */ - page = m_via_0_b ^ 0x01; - } - else if (m_via_0_b >= 0xA0) - { - bank = ~0; /* system bank */ - page = (m_via_0_b ^ 0x01) - 0x80; - } - else - { - bank = m_via_1_a; - page = (m_via_0_b ^ 0x01) - 0x20; - } - } - else - { - bank = ~0; - page = 0x01; - } - m_bank2 = apple3_bankaddr(bank, ((offs_t) page) * 0x100); - - /* bank 3 (0200-1FFF) */ - m_bank3 = apple3_bankaddr(~0, 0x0200); - - /* bank 4 (2000-9FFF) */ - m_bank4 = apple3_bankaddr(m_via_1_a, 0x0000); - - /* bank 5 (A000-BFFF) */ - m_bank5 = apple3_bankaddr(~0, 0x2000); - - /* bank 8 (C000-C0FF) */ - if (!(m_via_0_a & ENV_IOENABLE)) - { - m_bank8 = apple3_bankaddr(~0, 0x4000); - } - - /* bank 9 (C100-C4FF) */ - if (!(m_via_0_a & ENV_IOENABLE)) - { - m_bank9 = apple3_bankaddr(~0, 0x4100); - } - - /* bank 10 (C500-C7FF) */ - m_bank10 = apple3_bankaddr(~0, 0x4500); - - /* bank 11 (C800-CFFF) */ - if (!(m_via_0_a & ENV_IOENABLE)) - { - m_bank11 = apple3_bankaddr(~0, 0x4800); - } - - /* install bank 6 (D000-EFFF) */ - m_bank6 = apple3_bankaddr(~0, 0x5000); - - /* install bank 7 (F000-FFFF) */ - m_bank7wr = apple3_bankaddr(~0, 0x7000); - if (m_via_0_a & ENV_ROMENABLE) - { - m_bank7rd = memregion("maincpu")->base(); - } - else - { - m_bank7rd = m_bank7wr; - - // if we had an IRQ waiting for RAM to be paged in... - //apple3_irq_update(); - } -} - - - -void apple3_state::apple3_via_out(uint8_t *var, uint8_t data) -{ - if (*var != data) - { - *var = data; - apple3_update_memory(); - } -} - - -void apple3_state::apple3_via_0_out_a(uint8_t data) -{ - apple3_via_out(&m_via_0_a, data); -} - -void apple3_state::apple3_via_0_out_b(uint8_t data) -{ -// printf("ZP to %02x\n", data); - apple3_via_out(&m_via_0_b, data); -} - -void apple3_state::apple3_via_1_out_a(uint8_t data) -{ - apple3_via_out(&m_via_1_a, data); -} - -void apple3_state::apple3_via_1_out_b(uint8_t data) -{ - m_dac->write(data); - apple3_via_out(&m_via_1_b, data); -} - - -void apple3_state::machine_reset() -{ - m_indir_bank = 0; - m_sync = false; - m_bell_state = 0; - m_bell->write(m_bell_state); - m_c040_time = 0; - m_strobe = 0; - m_lastchar = 0x0d; - m_cnxx_slot = -1; - m_analog_sel = 0; - m_ramp_active = false; - m_charwrt = false; - m_inh_state = false; - - m_fdc->set_floppies_4(floppy0, floppy1, floppy2, floppy3); - - m_scanstart->adjust(m_screen->time_until_pos(0, 0)); - m_scanend->adjust(attotime::never); -} - -WRITE_LINE_MEMBER(apple3_state::a2bus_inh_w) -{ - m_inh_state = state; -} - -uint8_t *apple3_state::apple3_get_indexed_addr(offs_t offset) -{ - uint8_t *result = nullptr; - - // m_indir_bank is guaranteed to be between 0x80 and 0x8f - if (m_indir_bank == 0x8f) - { - /* get at that special ram under the VIAs */ - if ((offset >= 0xFFD0) && (offset <= 0xFFEF)) - result = apple3_bankaddr(~0, offset & 0x7FFF); - else if (offset < 0x2000) - result = apple3_bankaddr(~0, offset); - else if (offset > 0x9FFF) - result = apple3_bankaddr(~0, offset - 0x8000); - else - result = &m_ram->pointer()[offset - 0x2000]; - } - else - { - result = apple3_bankaddr(m_indir_bank, offset); - } - - return result; -} - -void apple3_state::init_apple3() -{ - m_enable_mask = 0; - - m_flags = 0; - m_via_0_a = ~0; - m_via_1_a = ~0; - m_va = 0; - m_vb = 0; - m_vc = 0; - m_smoothscr = 0; - m_inh_state = false; - - // kludge round +12v pull up resistors, which after conversion will bring this low when nothing is plugged in. issue also affects dcd/dsr but those don't affect booting. - m_acia->write_cts(0); - - /* these are here to appease the Apple /// confidence tests */ - m_via[1]->write_pa0(1); - m_via[1]->write_pa1(1); - m_via[1]->write_pa2(1); - m_via[1]->write_pa3(1); - m_via[1]->write_pa4(1); - m_via[1]->write_pa5(1); - m_via[1]->write_pa6(1); - m_via[1]->write_pa7(1); - - m_via[1]->write_pb0(1); - m_via[1]->write_pb1(1); - m_via[1]->write_pb2(1); - m_via[1]->write_pb3(1); - m_via[1]->write_pb4(1); - m_via[1]->write_pb5(1); - m_via[1]->write_pb6(1); - m_via[1]->write_pb7(1); - - m_scanstart = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(apple3_state::scanstart_cb),this)); - m_scanend = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(apple3_state::scanend_cb),this)); - - apple3_update_memory(); - - save_item(NAME(m_via_0_a)); - save_item(NAME(m_via_0_b)); - save_item(NAME(m_via_1_a)); - save_item(NAME(m_via_1_b)); - save_item(NAME(m_zpa)); - save_item(NAME(m_last_n)); - save_item(NAME(m_sync)); - save_item(NAME(m_indir_bank)); - save_item(NAME(m_cnxx_slot)); - save_item(NAME(m_bell_state)); - save_item(NAME(m_c040_time)); - save_item(NAME(m_lastchar)); - save_item(NAME(m_strobe)); - save_item(NAME(m_transchar)); - save_item(NAME(m_flags)); - save_item(NAME(m_char_mem)); - save_item(NAME(m_analog_sel)); - save_item(NAME(m_ramp_active)); - save_item(NAME(m_pdl_charge)); - save_item(NAME(m_va)); - save_item(NAME(m_vb)); - save_item(NAME(m_vc)); - save_item(NAME(m_smoothscr)); - save_item(NAME(m_charwrt)); - save_item(NAME(m_inh_state)); -} - -void apple3_state::device_post_load() -{ - apple3_update_memory(); -} - -uint8_t apple3_state::apple3_memory_r(offs_t offset) -{ - uint8_t rv = 0xff; - - if (m_inh_state) - { - for (int slot = 1; slot < 4; slot++) - { - device_a2bus_card_interface *slotdevice = m_a2bus->get_a2bus_card(slot); - if (slotdevice != nullptr) - { - if ((slotdevice->inh_type() & INH_READ) == INH_READ) - { - if ((offset >= slotdevice->inh_start()) && (offset <= slotdevice->inh_end())) - { - return slotdevice->read_inh_rom(offset); - } - } - } - } - } - - // (zp), y or (zp,x) read - if (!machine().side_effects_disabled()) - { - if ((m_indir_bank & 0x80) && (offset >= 0x100)) - { - uint8_t *test; - test = apple3_get_indexed_addr(offset); - - if (test) - { - return *test; - } - } - } - - if (offset < 0x100) - { - rv = *apple3_get_zpa_addr(offset); - - if ((!m_sync) && (m_via_0_b >= 0x18) && (m_via_0_b <= 0x1F)) - { - // fetch the "X byte" - m_indir_bank = *apple3_bankaddr(~0, m_zpa ^ 0x0C00) & 0x8f; - } - } - else if (offset < 0x200) - { - rv = m_bank2[offset-0x100]; - } - else if (offset < 0x2000) - { - rv = m_bank3[offset-0x200]; - } - else if (offset < 0xa000) - { - rv = m_bank4[offset-0x2000]; - } - else if (offset < 0xc000) - { - rv = m_bank5[offset-0xa000]; - } - else if (offset < 0xc100) - { - if (m_via_0_a & ENV_IOENABLE) - { - if (!machine().side_effects_disabled()) - { - rv = apple3_c0xx_r(offset-0xc000); - } - } - else - { - rv = m_bank8[offset - 0xc000]; - } - } - else if (offset < 0xc500) - { - if (!(m_via_0_a & ENV_IOENABLE)) - { - rv = m_bank9[offset - 0xc100]; - } - else if (!machine().side_effects_disabled()) - { - /* now identify the device */ - device_a2bus_card_interface *slotdevice = m_a2bus->get_a2bus_card((offset>>8) & 0x7); - - if (slotdevice != nullptr) - { - if (slotdevice->take_c800()) - { - m_cnxx_slot = ((offset>>8) & 7); - } - - return slotdevice->read_cnxx(offset&0xff); - } - } - } - else if (offset < 0xc800) - { - rv = m_bank10[offset - 0xc500]; - } - else if (offset < 0xd000) - { - if (!(m_via_0_a & ENV_IOENABLE)) - { - rv = m_bank11[offset - 0xc800]; - } - else - { - if (!machine().side_effects_disabled()) - { - if (offset == 0xcfff) - { - m_cnxx_slot = -1; - } - } - - if (m_cnxx_slot != -1) - { - device_a2bus_card_interface *slotdevice = m_a2bus->get_a2bus_card(m_cnxx_slot); - - if (slotdevice != nullptr) - { - rv = slotdevice->read_c800(offset&0x7ff); - } - } - } - } - else if (offset < 0xf000) - { - rv = m_bank6[offset - 0xd000]; - } - else - { - if (offset >= 0xffc0 && offset <= 0xffcf) - { - rv = m_bank7wr[offset - 0xf000]; - } - else if (offset >= 0xffd0 && offset <= 0xffdf) - { - rv = m_via[0]->read(offset); - } - else if (offset >= 0xffe0 && offset <= 0xffef) - { - rv = m_via[1]->read(offset); - } - else - { - rv = m_bank7rd[offset - 0xf000]; - } - } - - return rv; -} - -void apple3_state::apple3_memory_w(offs_t offset, uint8_t data) -{ - if (m_inh_state) - { - for (int slot = 1; slot < 4; slot++) - { - device_a2bus_card_interface *slotdevice = m_a2bus->get_a2bus_card(slot); - if (slotdevice != nullptr) - { - if ((slotdevice->inh_type() & INH_WRITE) == INH_WRITE) - { - if ((offset >= slotdevice->inh_start()) && (offset <= slotdevice->inh_end())) - { - slotdevice->write_inh_rom(offset, data); - return; - } - } - } - } - } - - if ((m_indir_bank & 0x80) && (offset >= 0x100)) - { - uint8_t *test; - test = apple3_get_indexed_addr(offset); - - if (test) - { - *test = data; - return; - } - } - - if (offset < 0x100) - { - *apple3_get_zpa_addr(offset) = data; - } - else if (offset < 0x200) - { - m_bank2[offset-0x100] = data; - } - else if (offset < 0x2000) - { - m_bank3[offset-0x200] = data; - } - else if (offset < 0xa000) - { - m_bank4[offset-0x2000] = data; - } - else if (offset < 0xc000) - { - m_bank5[offset-0xa000] = data; - } - else if (offset < 0xc100) - { - if (m_via_0_a & ENV_IOENABLE) - { - if (!machine().side_effects_disabled()) - { - apple3_c0xx_w(offset-0xc000, data); - } - } - else - { - // is this page write protected? - if (!(m_via_0_a & ENV_WRITEPROT)) - { - m_bank8[offset - 0xc000] = data; - } - } - } - else if (offset < 0xc500) - { - if (!(m_via_0_a & ENV_IOENABLE)) - { - if (!(m_via_0_a & ENV_WRITEPROT)) - { - m_bank9[offset - 0xc100] = data; - } - } - else - { - /* now identify the device */ - device_a2bus_card_interface *slotdevice = m_a2bus->get_a2bus_card((offset>>8) & 0x7); - - if (slotdevice != nullptr) - { - if (slotdevice->take_c800()) - { - m_cnxx_slot = ((offset>>8) & 7); - } - - slotdevice->write_cnxx(offset&0xff, data); - } - } - } - else if (offset < 0xc800) - { - if (!(m_via_0_a & ENV_WRITEPROT)) - { - m_bank10[offset - 0xc500] = data; - } - } - else if (offset < 0xd000) - { - if (!(m_via_0_a & ENV_IOENABLE)) - { - if (!(m_via_0_a & ENV_WRITEPROT)) - { - m_bank11[offset - 0xc800] = data; - } - } - else - { - if (offset == 0xcfff) - { - m_cnxx_slot = -1; - } - - if (m_cnxx_slot != -1) - { - device_a2bus_card_interface *slotdevice = m_a2bus->get_a2bus_card(m_cnxx_slot); - - if (slotdevice != nullptr) - { - slotdevice->write_c800(offset&0x7ff, data); - } - } - } - } - else if (offset < 0xf000) - { - if (!(m_via_0_a & ENV_WRITEPROT)) - { - m_bank6[offset - 0xd000] = data; - } - } - else - { - if (offset >= 0xffc0 && offset <= 0xffcf) - { - // does writeprot really apply to ffcx? - if (!(m_via_0_a & ENV_WRITEPROT)) - { - m_bank7wr[offset - 0xf000] = data; - } - } - else if (offset >= 0xffd0 && offset <= 0xffdf) - { - if (!machine().side_effects_disabled()) - { - m_via[0]->write(offset, data); - } - } - else if (offset >= 0xffe0 && offset <= 0xffef) - { - if (!machine().side_effects_disabled()) - { - m_via[1]->write(offset, data); - } - } - else - { - if (!(m_via_0_a & ENV_WRITEPROT)) - { - m_bank7wr[offset - 0xf000] = data; - } - } - } -} - -WRITE_LINE_MEMBER(apple3_state::apple3_sync_w) -{ -// printf("sync: %d\n", state); - m_sync = (state == ASSERT_LINE) ? true : false; - - if (m_sync) - { - m_indir_bank = 0; - } -} - -TIMER_DEVICE_CALLBACK_MEMBER(apple3_state::apple3_c040_tick) -{ - if (m_c040_time > 0) - { - m_bell_state ^= 1; - m_bell->write(m_bell_state); - m_c040_time--; - } -} - -TIMER_CALLBACK_MEMBER(apple3_state::scanstart_cb) -{ - int scanline; - - scanline = m_screen->vpos(); - //m_screen->update_partial(m_screen->vpos()); - - m_via[1]->write_pb6(0); - - m_scanend->adjust(m_screen->time_until_pos(scanline, 559)); -} - -TIMER_CALLBACK_MEMBER(apple3_state::scanend_cb) -{ - int scanline = m_screen->vpos(); - - m_via[1]->write_pb6(1); - - m_scanstart->adjust(m_screen->time_until_pos((scanline+1) % 224, 0)); -} - -READ_LINE_MEMBER(apple3_state::ay3600_shift_r) -{ - // either shift key - if (m_kbspecial->read() & 0x06) - { - return ASSERT_LINE; - } - - return CLEAR_LINE; -} - -READ_LINE_MEMBER(apple3_state::ay3600_control_r) -{ - if (m_kbspecial->read() & 0x08) - { - return ASSERT_LINE; - } - - return CLEAR_LINE; -} - -static const uint8_t key_remap[0x50][4] = -{ -/* norm shft ctrl both */ - { 0x9b,0x9b,0x9b,0x9b }, /* Escape 00 */ - { 0x31,0x21,0x31,0x31 }, /* 1 ! 01 */ - { 0x32,0x40,0x32,0x00 }, /* 2 @ 02 */ - { 0x33,0x23,0x33,0x23 }, /* 3 # 03 */ - { 0x34,0x24,0x34,0x24 }, /* 4 $ 04 */ - { 0x35,0x25,0x35,0x25 }, /* 5 % 05 */ - { 0x36,0x5e,0x35,0x53 }, /* 6 ^ 06 */ - { 0x37,0x26,0x37,0x26 }, /* 7 & 07 */ - { 0x38,0x2a,0x38,0x2a }, /* 8 * 08 */ - { 0x39,0x28,0x39,0x28 }, /* 9 ( 09 */ - { 0x89,0x89,0x89,0x89 }, /* Tab 0a */ - { 0x51,0x51,0x11,0x11 }, /* q Q 0b */ - { 0x57,0x57,0x17,0x17 }, /* w W 0c */ - { 0x45,0x45,0x05,0x05 }, /* e E 0d */ - { 0x52,0x52,0x12,0x12 }, /* r R 0e */ - { 0x54,0x54,0x14,0x14 }, /* t T 0f */ - { 0x59,0x59,0x19,0x19 }, /* y Y 10 */ - { 0x55,0x55,0x15,0x15 }, /* u U 11 */ - { 0x49,0x49,0x09,0x09 }, /* i I 12 */ - { 0x4f,0x4f,0x0f,0x0f }, /* o O 13 */ - { 0x41,0x41,0x01,0x01 }, /* a A 14 */ - { 0x53,0x53,0x13,0x13 }, /* s S 15 */ - { 0x44,0x44,0x04,0x04 }, /* d D 16 */ - { 0x46,0x46,0x06,0x06 }, /* f F 17 */ - { 0x48,0x48,0x08,0x08 }, /* h H 18 */ - { 0x47,0x47,0x07,0x07 }, /* g G 19 */ - { 0x4a,0x4a,0x0a,0x0a }, /* j J 1a */ - { 0x4b,0x4b,0x0b,0x0b }, /* k K 1b */ - { 0x3b,0x3a,0x3b,0x3a }, /* ; : 1c */ - { 0x4c,0x4c,0x0c,0x0c }, /* l L 1d */ - { 0x5a,0x5a,0x1a,0x1a }, /* z Z 1e */ - { 0x58,0x58,0x18,0x18 }, /* x X 1f */ - { 0x43,0x43,0x03,0x03 }, /* c C 20 */ - { 0x56,0x56,0x16,0x16 }, /* v V 21 */ - { 0x42,0x42,0x02,0x02 }, /* b B 22 */ - { 0x4e,0x4e,0x0e,0x0e }, /* n N 23 */ - { 0x4d,0x4d,0x0d,0x0d }, /* m M 24 */ - { 0x2c,0x3c,0x2c,0x3c }, /* , < 25 */ - { 0x2e,0x3e,0x2e,0x3e }, /* . > 26 */ - { 0x2f,0x3f,0x2f,0x3f }, /* / ? 27 */ - { 0x00,0x00,0x00,0x00 }, /* 0x28 unused */ - { 0xb9,0xb9,0xb9,0xb9 }, /* 9 (KP) 29 */ - { 0x00,0x00,0x00,0x00 }, /* 0x2a unused */ - { 0xb8,0xb8,0xb8,0xb8 }, /* 8 (KP) 2b */ - { 0x00,0x00,0x00,0x00 }, /* 0x2c unused */ - { 0xb7,0xb7,0xb7,0xb7 }, /* 7 (KP) 2d */ - { 0x5c,0x7c,0x7f,0x1c }, /* \ | 2e */ - { 0x3d,0x2b,0x3d,0x2b }, /* = + 2f */ - { 0x30,0x29,0x30,0x29 }, /* 0 ) 30 */ - { 0x2d,0x5f,0x2d,0x1f }, /* - _ 31 */ - { 0x00,0x00,0x00,0x00 }, /* 0x32 unused */ - { 0xb6,0xb6,0xb6,0xb6 }, /* 6 (KP) 33 */ - { 0x00,0x00,0x00,0x00 }, /* 0x34 unused */ - { 0xb5,0xb5,0xb5,0xb5 }, /* 5 (KP) 35 */ - { 0x00,0x00,0x00,0x00 }, /* 0x36 unused */ - { 0xb4,0xb4,0xb4,0xb4 }, /* 4 (KP) 37 */ - { 0x60,0x7e,0x60,0x7e }, /* ` ~ 38 */ - { 0x5d,0x7d,0x1d,0x1d }, /* ] } 39 */ - { 0x50,0x50,0x10,0x10 }, /* p P 3a */ - { 0x5b,0x7b,0x1b,0x1b }, /* [ { 3b */ - { 0x00,0x00,0x00,0x00 }, /* 0x3c unused */ - { 0xb3,0xb3,0xb3,0xb3 }, /* 3 (KP) 3d */ - { 0xae,0xae,0xae,0xae }, /* . (KP) 3e */ - { 0xb2,0xb2,0xb2,0xb2 }, /* 2 (KP) 3f */ - { 0xb0,0xb0,0xb0,0xb0 }, /* 0 (KP) 40 */ - { 0xb1,0xb1,0xb1,0xb1 }, /* 1 (KP) 41 */ - { 0x0d,0x0d,0x0d,0x0d }, /* Enter 42 */ - { 0x8b,0x8b,0x8b,0x8b }, /* Up 43 */ - { 0x00,0x00,0x00,0x00 }, /* 0x44 unused */ - { 0x27,0x22,0x27,0x22 }, /* ' " 45 */ - { 0x00,0x00,0x00,0x00 }, /* 0x46 unused */ - { 0x00,0x00,0x00,0x00 }, /* 0x47 unused */ - { 0x8d,0x8d,0x8d,0x8d }, /* Ent(KP) 48 */ - { 0xa0,0xa0,0xa0,0xa0 }, /* Space 49 */ - { 0x00,0x00,0x00,0x00 }, /* 0x4a unused */ - { 0xad,0xad,0xad,0xad }, /* - (KP) 4b */ - { 0x95,0x95,0x95,0x95 }, /* Right 4c */ - { 0x8a,0x8a,0x8a,0x8a }, /* Down 4d */ - { 0x88,0x88,0x88,0x88 }, /* Left 4e */ - { 0x00,0x00,0x00,0x00 } /* 0x4f unused */ -}; - -WRITE_LINE_MEMBER(apple3_state::ay3600_data_ready_w) -{ - m_via[1]->write_ca2(state); - - if (state == ASSERT_LINE) - { - uint16_t trans; - int mod = 0; - m_lastchar = m_ay3600->b_r(); - - trans = m_lastchar & ~(0x1c0); // clear the 3600's control/shift stuff - trans |= (m_lastchar & 0x100)>>2; // bring the 0x100 bit down to the 0x40 place - - mod = (m_kbspecial->read() & 0x06) ? 0x01 : 0x00; - mod |= (m_kbspecial->read() & 0x08) ? 0x02 : 0x00; - - m_transchar = key_remap[trans][mod]; - - if (m_transchar != 0) - { - m_strobe = 0x80; -// printf("new char = %04x (%02x)\n", trans, m_transchar); - } - } -} - -void apple3_state::pdl_handler(int offset) -{ - uint8_t pdlread; - - switch (offset) - { - case 0x58: - m_analog_sel &= ~1; - break; - - case 0x59: - m_analog_sel |= 1; - break; - - case 0x5a: - m_analog_sel &= ~4; - break; - - case 0x5b: - m_analog_sel |= 4; - break; - - case 0x5c: - m_ramp_active = false; - m_pdl_charge = 0; - m_pdltimer->adjust(attotime::from_hz(1000000.0)); - break; - - case 0x5d: - switch (m_analog_sel) - { - case 1: - pdlread = m_joy1x->read(); - break; - - case 2: - pdlread = 255 - m_joy1y->read(); - break; - - case 4: - pdlread = m_joy2x->read(); - break; - - case 5: - pdlread = 255 - m_joy2y->read(); - break; - - default: - pdlread = 127; - break; - } - - // help the ROM self-test - if (m_pdl_charge > 82) - { - m_pdl_charge += (pdlread*7); - m_pdl_charge -= 100; - } - m_pdltimer->adjust(attotime::from_hz(1000000.0)); - m_ramp_active = true; - break; - - case 0x5e: - m_analog_sel &= ~2; - break; - - case 0x5f: - m_analog_sel |= 2; - break; - } -} - -TIMER_DEVICE_CALLBACK_MEMBER(apple3_state::paddle_timer) -{ - if (m_ramp_active) - { - m_pdl_charge--; - - if (m_pdl_charge > 0) - { - m_pdltimer->adjust(attotime::from_hz(1000000.0)); - } - else - { - m_pdltimer->adjust(attotime::never); - m_ramp_active = false; - } - } - else - { - m_pdl_charge++; - m_pdltimer->adjust(attotime::from_hz(1000000.0)); - } -} - -WRITE_LINE_MEMBER(apple3_state::a2bus_irq_w) -{ - uint8_t irq_mask = m_a2bus->get_a2bus_irq_mask(); - - m_via[0]->write_ca1(!state); - - if (irq_mask & (1<<4)) - { - m_via[1]->write_pa4(CLEAR_LINE); - } - else - { - m_via[1]->write_pa4(ASSERT_LINE); - } - - if (irq_mask & (1<<3)) - { - m_via[1]->write_pa5(CLEAR_LINE); - } - else - { - m_via[1]->write_pa5(ASSERT_LINE); - } -} - -WRITE_LINE_MEMBER(apple3_state::a2bus_nmi_w) -{ - m_via[1]->write_pb7(state); - - if (m_via_0_a & ENV_NMIENABLE) - { - m_maincpu->set_input_line(INPUT_LINE_NMI, state); - } -} |