/***************************************************************************
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"
#include "machine/applefdc.h"
#include "machine/appldriv.h"
static void apple3_update_drives(device_t *device);
#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:
return 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 */
if (offset & 1)
m_flags |= VAR_EXTA0 << ((offset - 0xD0) / 2);
else
m_flags &= ~(VAR_EXTA0 << ((offset - 0xD0) / 2));
apple3_update_drives(machine().device("fdc"));
result = 0x00;
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:
result = m_fdc->read(offset);
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 */
if (offset & 1)
m_flags |= VAR_EXTA0 << ((offset - 0xD0) / 2);
else
m_flags &= ~(VAR_EXTA0 << ((offset - 0xD0) / 2));
apple3_update_drives(machine().device("fdc"));
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(offset, 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) ? 1000000 : 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;
}
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;
}
static void apple3_update_drives(device_t *device)
{
apple3_state *state = device->machine().driver_data<apple3_state>();
int enable_mask = 0x00;
if (state->m_enable_mask & 0x01)
enable_mask |= 0x01;
if (state->m_enable_mask & 0x02)
{
switch(state->m_flags & (VAR_EXTA0 | VAR_EXTA1))
{
case VAR_EXTA0:
enable_mask |= 0x02;
break;
case VAR_EXTA1:
enable_mask |= 0x04;
break;
case VAR_EXTA1|VAR_EXTA0:
enable_mask |= 0x08;
break;
}
}
apple525_set_enable_lines(device,enable_mask);
}
static void apple3_set_enable_lines(device_t *device,int enable_mask)
{
apple3_state *state = device->machine().driver_data<apple3_state>();
state->m_enable_mask = enable_mask;
apple3_update_drives(device);
}
const applefdc_interface apple3_fdc_interface =
{
apple525_set_lines,
apple3_set_enable_lines,
apple525_read_data,
apple525_write_data
};
DRIVER_INIT_MEMBER(apple3_state,apple3)
{
m_enable_mask = 0;
apple3_update_drives(machine().device("fdc"));
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;
// 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));
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));
}
}