// 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" #include "includes/apple2.h" #define LOG_MEMORY 1 #define LOG_INDXADDR 1 #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) READ8_MEMBER(apple3_state::apple3_c0xx_r) { UINT8 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 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: 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_speaker_state ^= 1; m_speaker->level_w(m_speaker_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: case 0x4E: case 0x4F: m_c040_time = 200; break; case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x55: case 0x56: case 0x57: /* 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 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(space, 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 != NULL) { result = slotdevice->read_c0nx(space, 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 != NULL) { result = slotdevice->read_c0nx(space, 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 != NULL) { result = slotdevice->read_c0nx(space, 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 != NULL) { result = slotdevice->read_c0nx(space, 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(space, offset&0xf); result = 0x00; break; case 0xd8: case 0xd9: m_smoothscr = offset & 1; break; case 0xDB: apple3_write_charmem(); break; case 0xE0: case 0xE1: result = m_fdc->read(space, offset&0xf); m_va = offset & 1; break; case 0xE2: case 0xE3: result = m_fdc->read(space, offset&0xf); m_vb = offset & 1; break; case 0xE4: case 0xE5: result = m_fdc->read(space, 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(space, offset&0xf); break; case 0xF0: case 0xF1: case 0xF2: case 0xF3: result = m_acia->read(space, offset & 0x03); break; } return result; } WRITE8_MEMBER(apple3_state::apple3_c0xx_w) { 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_speaker_state ^= 1; m_speaker->level_w(m_speaker_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: case 0x4E: case 0x4F: m_c040_time = 200; break; case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x55: case 0x56: case 0x57: /* 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(space, 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 != NULL) { slotdevice->write_c0nx(space, 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 != NULL) { slotdevice->write_c0nx(space, 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 != NULL) { slotdevice->write_c0nx(space, 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 != NULL) { slotdevice->write_c0nx(space, 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(space, offset&0xf, data); break; case 0xd9: popmessage("Smooth scroll enabled, contact MESSdev"); break; case 0xDB: apple3_write_charmem(); 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(space, offset&0xf, data); break; case 0xF0: case 0xF1: case 0xF2: case 0xF3: m_acia->write(space, offset & 0x03, data); break; } } TIMER_DEVICE_CALLBACK_MEMBER(apple3_state::apple3_interrupt) { m_via_1->write_cb1(machine().first_screen()->vblank()); m_via_1->write_cb2(machine().first_screen()->vblank()); } UINT8 *apple3_state::apple3_bankaddr(UINT16 bank, offs_t offset) { if (bank != (UINT16) ~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 *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 bank; UINT8 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); } machine().device("maincpu")->set_unscaled_clock((m_via_0_a & ENV_SLOWSPEED) ? 1021800 : 2000000); /* 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_rom_has_been_disabled = true; 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 *var, UINT8 data) { if (*var != data) { *var = data; apple3_update_memory(); } } WRITE8_MEMBER(apple3_state::apple3_via_0_out_a) { apple3_via_out(&m_via_0_a, data); } WRITE8_MEMBER(apple3_state::apple3_via_0_out_b) { // printf("ZP to %02x\n", data); apple3_via_out(&m_via_0_b, data); } WRITE8_MEMBER(apple3_state::apple3_via_1_out_a) { apple3_via_out(&m_via_1_a, data); } WRITE8_MEMBER(apple3_state::apple3_via_1_out_b) { m_dac->write_unsigned8(data<<2); apple3_via_out(&m_via_1_b, data); } void apple3_state::apple3_irq_update() { if (m_acia_irq || m_via_1_irq || m_via_0_irq) { // HACK: SOS floppy driver enables ROM at Fxxx *before* trying to // suppress IRQs. IRQ hits at inopportune time -> bad vector -> system crash. // This breaks the Confidence Test, but the Confidence Test // never disables the ROM so checking for that gets us // working in all cases. // Bonus points: for some reason this isn't a problem with -debug. // m6502 heisenbug maybe? if ((m_via_0_a & ENV_ROMENABLE) && (m_rom_has_been_disabled)) { return; } // printf(" setting IRQ\n"); m_maincpu->set_input_line(M6502_IRQ_LINE, ASSERT_LINE); m_via_1->write_pa7(0); // this is active low } else { // printf(" clearing IRQ\n"); m_maincpu->set_input_line(M6502_IRQ_LINE, CLEAR_LINE); m_via_1->write_pa7(1); } } WRITE_LINE_MEMBER(apple3_state::apple3_acia_irq_func) { // printf("acia IRQ: %d\n", state); m_acia_irq = state; apple3_irq_update(); } WRITE_LINE_MEMBER(apple3_state::apple3_via_1_irq_func) { // printf("via 1 IRQ: %d\n", state); m_via_1_irq = state; apple3_irq_update(); } WRITE_LINE_MEMBER(apple3_state::apple3_via_0_irq_func) { // printf("via 0 IRQ: %d\n", state); m_via_0_irq = state; apple3_irq_update(); } MACHINE_RESET_MEMBER(apple3_state,apple3) { m_indir_bank = 0; m_sync = false; m_speaker_state = 0; m_speaker->level_w(0); m_c040_time = 0; m_strobe = 0; m_lastchar = 0x0d; m_rom_has_been_disabled = false; m_cnxx_slot = -1; m_analog_sel = 0; m_ramp_active = false; m_fdc->set_floppies_4(floppy0, floppy1, floppy2, floppy3); } UINT8 *apple3_state::apple3_get_indexed_addr(offs_t offset) { UINT8 *result = NULL; // 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 - 0x2000); 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; } DRIVER_INIT_MEMBER(apple3_state,apple3) { m_enable_mask = 0; m_flags = 0; m_acia_irq = 0; m_via_0_a = ~0; m_via_1_a = ~0; m_via_0_irq = 0; m_via_1_irq = 0; m_va = 0; m_vb = 0; m_vc = 0; m_smoothscr = 0; // 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); apple3_update_memory(); save_item(NAME(m_acia_irq)); 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_via_0_irq)); save_item(NAME(m_via_1_irq)); save_item(NAME(m_zpa)); save_item(NAME(m_last_n)); save_item(NAME(m_sync)); save_item(NAME(m_rom_has_been_disabled)); save_item(NAME(m_indir_bank)); save_item(NAME(m_cnxx_slot)); save_item(NAME(m_speaker_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)); machine().save().register_postload(save_prepost_delegate(FUNC(apple3_state::apple3_postload), this)); } void apple3_state::apple3_postload() { apple3_update_memory(); } READ8_MEMBER(apple3_state::apple3_memory_r) { UINT8 rv = 0xff; // (zp), y or (zp,x) read if (!space.debugger_access()) { if ((m_indir_bank & 0x80) && (offset >= 0x100)) { UINT8 *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 (!space.debugger_access()) { rv = apple3_c0xx_r(space, 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 { /* now identify the device */ device_a2bus_card_interface *slotdevice = m_a2bus->get_a2bus_card((offset>>8) & 0x7); if (slotdevice != NULL) { if (slotdevice->take_c800()) { m_cnxx_slot = ((offset>>8) & 7); } return slotdevice->read_cnxx(space, 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 (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 != NULL) { rv = slotdevice->read_c800(space, offset&0x7ff); } } } } else if (offset < 0xf000) { rv = m_bank6[offset - 0xd000]; } else { if (offset >= 0xffd0 && offset <= 0xffdf) { rv = m_via_0->read(space, offset); } else if (offset >= 0xffe0 && offset <= 0xffef) { rv = m_via_1->read(space, offset); } else { rv = m_bank7rd[offset - 0xf000]; } } return rv; } WRITE8_MEMBER(apple3_state::apple3_memory_w) { if ((m_indir_bank & 0x80) && (offset >= 0x100)) { UINT8 *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 (!space.debugger_access()) { apple3_c0xx_w(space, 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 != NULL) { if (slotdevice->take_c800()) { m_cnxx_slot = ((offset>>8) & 7); } slotdevice->write_cnxx(space, 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 != NULL) { slotdevice->write_c800(space, offset&0x7ff, data); } } } } else if (offset < 0xf000) { if (!(m_via_0_a & ENV_WRITEPROT)) { m_bank6[offset - 0xd000] = data; } } else { if (offset >= 0xffd0 && offset <= 0xffdf) { if (!space.debugger_access()) { m_via_0->write(space, offset, data); } } else if (offset >= 0xffe0 && offset <= 0xffef) { if (!space.debugger_access()) { m_via_1->write(space, 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_speaker_state ^= 1; m_speaker->level_w(m_speaker_state); m_c040_time--; } } 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 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 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 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 = m_joy1y->read(); break; case 4: pdlread = m_joy2x->read(); break; case 5: pdlread = m_joy2y->read(); break; default: pdlread = 127; break; } // help the ROM self-test if (m_pdl_charge > 82) { m_pdl_charge += (pdlread*4); m_pdl_charge -= 93; } 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 irq_mask = m_a2bus->get_a2bus_irq_mask(); m_via_1->write_ca1(state); m_via_1->write_pa7(state); if (irq_mask & (1<<4)) { m_via_1->write_pa4(ASSERT_LINE); } else { m_via_1->write_pa4(CLEAR_LINE); } if (irq_mask & (1<<3)) { m_via_1->write_pa5(ASSERT_LINE); } else { m_via_1->write_pa5(CLEAR_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); } }