#include "emu.h"
#include "video/stic.h"
#include "includes/intv.h"
#include "cpu/cp1610/cp1610.h"
#include "hashfile.h"
#define INTELLIVOICE_MASK 0x02
#define ECS_MASK 0x01
WRITE16_MEMBER( intv_state::intvkbd_dualport16_w )
{
unsigned char *RAM;
COMBINE_DATA(&m_intvkbd_dualport_ram[offset]);
/* copy the LSB over to the 6502 OP RAM, in case they are opcodes */
RAM = m_region_keyboard->base();
RAM[offset] = (UINT8) (data >> 0);
}
READ8_MEMBER( intv_state::intvkbd_dualport8_lsb_r )
{
return (UINT8) (m_intvkbd_dualport_ram[offset] >> 0);
}
WRITE8_MEMBER( intv_state::intvkbd_dualport8_lsb_w )
{
unsigned char *RAM;
m_intvkbd_dualport_ram[offset] &= ~0x00FF;
m_intvkbd_dualport_ram[offset] |= ((UINT16) data) << 0;
/* copy over to the 6502 OP RAM, in case they are opcodes */
RAM = m_region_keyboard->base();
RAM[offset] = data;
}
READ8_MEMBER( intv_state::intvkbd_dualport8_msb_r )
{
unsigned char rv;
if (offset < 0x100)
{
switch (offset)
{
case 0x000:
rv = m_io_test->read() & 0x80;
logerror("TAPE: Read %02x from 0x40%02x - XOR Data?\n",rv,offset);
break;
case 0x001:
rv = (m_io_test->read() & 0x40) << 1;
logerror("TAPE: Read %02x from 0x40%02x - Sense 1?\n",rv,offset);
break;
case 0x002:
rv = (m_io_test->read() & 0x20) << 2;
logerror("TAPE: Read %02x from 0x40%02x - Sense 2?\n",rv,offset);
break;
case 0x003:
rv = (m_io_test->read() & 0x10) << 3;
logerror("TAPE: Read %02x from 0x40%02x - Tape Present\n",rv,offset);
break;
case 0x004:
rv = (m_io_test->read() & 0x08) << 4;
logerror("TAPE: Read %02x from 0x40%02x - Comp (339/1)\n",rv,offset);
break;
case 0x005:
rv = (m_io_test->read() & 0x04) << 5;
logerror("TAPE: Read %02x from 0x40%02x - Clocked Comp (339/13)\n",rv,offset);
break;
case 0x006:
if (m_sr1_int_pending)
rv = 0x00;
else
rv = 0x80;
logerror("TAPE: Read %02x from 0x40%02x - SR1 Int Pending\n",rv,offset);
break;
case 0x007:
if (m_tape_int_pending)
rv = 0x00;
else
rv = 0x80;
logerror("TAPE: Read %02x from 0x40%02x - Tape? Int Pending\n",rv,offset);
break;
case 0x060: /* Keyboard Read */
rv = 0xff;
if (m_intvkbd_keyboard_col < 10)
rv = m_intv_keyboard[m_intvkbd_keyboard_col]->read();
break;
case 0x80:
rv = 0x00;
logerror("TAPE: Read %02x from 0x40%02x, clear tape int pending\n",rv,offset);
m_tape_int_pending = 0;
break;
case 0xa0:
rv = 0x00;
logerror("TAPE: Read %02x from 0x40%02x, clear SR1 int pending\n",rv,offset);
m_sr1_int_pending = 0;
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:
/* TMS9927 regs */
rv = intvkbd_tms9927_r(space, offset-0xc0);
break;
default:
rv = (m_intvkbd_dualport_ram[offset]&0x0300)>>8;
logerror("Unknown read %02x from 0x40%02x\n",rv,offset);
break;
}
return rv;
}
else
return (m_intvkbd_dualport_ram[offset]&0x0300)>>8;
}
static const char *const tape_motor_mode_desc[8] =
{
"IDLE", "IDLE", "IDLE", "IDLE",
"EJECT", "PLAY/RECORD", "REWIND", "FF"
};
WRITE8_MEMBER( intv_state::intvkbd_dualport8_msb_w )
{
unsigned int mask;
if (offset < 0x100)
{
switch (offset)
{
case 0x020:
m_tape_motor_mode &= 3;
if (data & 1)
m_tape_motor_mode |= 4;
logerror("TAPE: Motor Mode: %s\n",tape_motor_mode_desc[m_tape_motor_mode]);
break;
case 0x021:
m_tape_motor_mode &= 5;
if (data & 1)
m_tape_motor_mode |= 2;
logerror("TAPE: Motor Mode: %s\n",tape_motor_mode_desc[m_tape_motor_mode]);
break;
case 0x022:
m_tape_motor_mode &= 6;
if (data & 1)
m_tape_motor_mode |= 1;
logerror("TAPE: Motor Mode: %s\n",tape_motor_mode_desc[m_tape_motor_mode]);
break;
case 0x023:
case 0x024:
case 0x025:
case 0x026:
case 0x027:
m_tape_unknown_write[offset - 0x23] = (data & 1);
break;
case 0x040:
m_tape_unknown_write[5] = (data & 1);
break;
case 0x041:
if (data & 1)
logerror("TAPE: Tape Interrupts Enabled\n");
else
logerror("TAPE: Tape Interrupts Disabled\n");
m_tape_interrupts_enabled = (data & 1);
break;
case 0x042:
if (data & 1)
logerror("TAPE: Cart Bus Interrupts Disabled\n");
else
logerror("TAPE: Cart Bus Interrupts Enabled\n");
break;
case 0x043:
if (data & 0x01)
m_intvkbd_text_blanked = 0;
else
m_intvkbd_text_blanked = 1;
break;
case 0x044:
m_intvkbd_keyboard_col &= 0x0e;
m_intvkbd_keyboard_col |= (data&0x01);
break;
case 0x045:
m_intvkbd_keyboard_col &= 0x0d;
m_intvkbd_keyboard_col |= ((data&0x01)<<1);
break;
case 0x046:
m_intvkbd_keyboard_col &= 0x0b;
m_intvkbd_keyboard_col |= ((data&0x01)<<2);
break;
case 0x047:
m_intvkbd_keyboard_col &= 0x07;
m_intvkbd_keyboard_col |= ((data&0x01)<<3);
break;
case 0x80:
logerror("TAPE: Write to 0x40%02x, clear tape int pending\n",offset);
m_tape_int_pending = 0;
break;
case 0xa0:
logerror("TAPE: Write to 0x40%02x, clear SR1 int pending\n",offset);
m_sr1_int_pending = 0;
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:
/* TMS9927 regs */
intvkbd_tms9927_w(space, offset-0xc0, data);
break;
default:
logerror("%04X: Unknown write %02x to 0x40%02x\n",space.device().safe_pc(),data,offset);
break;
}
}
else
{
mask = m_intvkbd_dualport_ram[offset] & 0x00ff;
m_intvkbd_dualport_ram[offset] = mask | ((data<<8)&0x0300);
}
}
READ16_MEMBER( intv_state::intv_stic_r )
{
if (m_bus_copy_mode || !m_stic->read_stic_handshake())
return m_stic->read(space, offset, mem_mask);
else
return offset;
}
WRITE16_MEMBER( intv_state::intv_stic_w )
{
if (m_bus_copy_mode || !m_stic->read_stic_handshake())
m_stic->write(space, offset, data, mem_mask);
}
READ16_MEMBER( intv_state::intv_gram_r )
{
//logerror("read: %d = GRAM(%d)\n",state->m_gram[offset],offset);
if (m_bus_copy_mode || !m_stic->read_stic_handshake())
return m_stic->gram_read(space, offset, mem_mask);
else
return offset;
}
WRITE16_MEMBER( intv_state::intv_gram_w )
{
if (m_bus_copy_mode || !m_stic->read_stic_handshake())
m_stic->gram_write(space, offset, data, mem_mask);
}
READ16_MEMBER( intv_state::intv_ram8_r )
{
//logerror("%x = ram8_r(%x)\n",state->m_ram8[offset],offset);
return (int)m_ram8[offset];
}
WRITE16_MEMBER( intv_state::intv_ram8_w )
{
//logerror("ram8_w(%x) = %x\n",offset,data);
m_ram8[offset] = data&0xff;
}
READ16_MEMBER( intv_state::intv_ecs_ram8_r )
{
return (int)m_ecs_ram8[offset];
}
WRITE16_MEMBER( intv_state::intv_ecs_ram8_w )
{
m_ecs_ram8[offset] = data&0xff;
}
READ16_MEMBER( intv_state::intv_cart_ram8_r )
{
return (int)m_cart_ram8[offset];
}
WRITE16_MEMBER( intv_state::intv_cart_ram8_w )
{
m_cart_ram8[offset] = data&0xff;
}
READ16_MEMBER( intv_state::intv_ram16_r )
{
//logerror("%x = ram16_r(%x)\n",state->m_ram16[offset],offset);
return (int)m_ram16[offset];
}
WRITE16_MEMBER( intv_state::intv_ram16_w )
{
//logerror("%g: WRITING TO GRAM offset = %d\n",machine.time(),offset);
//logerror("ram16_w(%x) = %x\n",offset,data);
m_ram16[offset] = data & 0xffff;
}
// ECS and Wsmlb bank switching register handlers
WRITE16_MEMBER( intv_state::ecs_bank1_page_select )
{
if (offset == 0xfff)
{
if (data == 0x2a50)
{
m_ecs_bank_src[0] = 0;
m_bank1->set_base(m_bank_base[m_ecs_bank_src[0]] + (0x2000 << 1));
}
else if (data == 0x2a51)
{
m_ecs_bank_src[0] = 1;
m_bank1->set_base(m_bank_base[m_ecs_bank_src[0]] + (0x2000 << 1));
}
}
}
WRITE16_MEMBER( intv_state::ecs_bank2_page_select )
{
if (offset == 0xfff)
{
if (data == 0x7a50)
{
m_ecs_bank_src[1] = 1;
m_bank2->set_base(m_bank_base[m_ecs_bank_src[1]] + (0x7000 << 1)); // ECS ROM at 0x7000 is on page 1
}
else if (data == 0x7a51 )
{
m_ecs_bank_src[1] = 0;
m_bank2->set_base(m_bank_base[m_ecs_bank_src[1]] + (0x7000 << 1));
}
}
}
WRITE16_MEMBER( intv_state::ecs_bank3_page_select )
{
if (offset == 0xfff)
{
if (data == 0xea50)
{
m_ecs_bank_src[2] = 0;
m_bank3->set_base(m_bank_base[m_ecs_bank_src[2]] + (0xe000 << 1));
}
else if (data == 0xea51)
{
m_ecs_bank_src[2] = 1;
m_bank3->set_base(m_bank_base[m_ecs_bank_src[2]] + (0xe000 << 1));
}
}
}
WRITE16_MEMBER( intv_state::wsmlb_bank_page_select )
{
logerror("offset %x data %x\n", offset, data);
if (offset == 0xfff)
{
if (data == 0xfa50)
{
m_ecs_bank_src[3] = 0;
m_bank4->set_base(m_bank_base[m_ecs_bank_src[3]] + (0xf000 << 1));
}
else if (data == 0xfa51)
{
m_ecs_bank_src[3] = 1;
m_bank4->set_base(m_bank_base[m_ecs_bank_src[3]] + (0xf000 << 1));
}
}
}
int intv_state::intv_load_rom_file(device_image_interface &image)
{
int i,j;
UINT8 temp;
UINT8 num_segments;
UINT8 start_seg;
UINT8 end_seg;
UINT32 current_address;
UINT32 end_address;
UINT8 high_byte;
UINT8 low_byte;
UINT8 *memory = m_region_maincpu->base();
address_space &program = m_maincpu->space(AS_PROGRAM);
const char *filetype = image.filetype();
/* if it is in .rom format, we enter here */
if (!core_stricmp (filetype, "rom"))
{
image.fread( &temp, 1); /* header */
if (temp != 0xa8)
{
return IMAGE_INIT_FAIL;
}
image.fread( &num_segments, 1);
image.fread( &temp, 1);
if (temp != (num_segments ^ 0xff))
{
return IMAGE_INIT_FAIL;
}
for (i = 0; i < num_segments; i++)
{
image.fread( &start_seg, 1);
current_address = start_seg * 0x100;
image.fread( &end_seg, 1);
end_address = end_seg * 0x100 + 0xff;
while (current_address <= end_address)
{
image.fread( &low_byte, 1);
memory[(current_address << 1) + 1] = low_byte;
image.fread( &high_byte, 1);
memory[current_address << 1] = high_byte;
current_address++;
}
/* Here we should calculate and compare the CRC16... */
image.fread( &temp, 1);
image.fread( &temp, 1);
}
/* Access tables and fine address restriction tables are not supported ATM */
for (i = 0; i < (16 + 32 + 2); i++)
{
image.fread( &temp, 1);
}
return IMAGE_INIT_PASS;
}
/* otherwise, we load it as a .bin file, using extrainfo from intv.hsi in place of .cfg */
else
{
/* This code is a blatant hack, due to impossibility to load a separate .cfg file in MESS. */
/* It shall be eventually replaced by the .xml loading */
/* extrainfo format */
// 1. mapper number (to deal with bankswitch). no bankswitch is mapper 0 (most games).
// 2.->5. current images have at most 4 chunks of data. we store here block size and location to load
// (value & 0xf0) >> 4 is the location / 0x1000
// (value & 0x0f) is the size / 0x800
// 6. some images have a ram chunk. as above we store location and size in 8 bits
// 7. extra = 1 ECS, 2 Intellivoice
int start, size;
int mapper, rom[5], ram, extra;
astring extrainfo;
if (!hashfile_extrainfo(image, extrainfo))
{
/* If no extrainfo, we assume a single 0x2000 chunk at 0x5000 */
for (i = 0; i < 0x2000; i++ )
{
image.fread( &low_byte, 1);
memory[((0x5000 + i) << 1) + 1] = low_byte;
image.fread( &high_byte, 1);
memory[(0x5000 + i) << 1] = high_byte;
}
}
else
{
sscanf(extrainfo.cstr() ,"%d %d %d %d %d %d %d", &mapper, &rom[0], &rom[1], &rom[2],
&rom[3], &ram, &extra);
// logerror("extrainfo: %d %d %d %d %d %d %d \n", mapper, rom[0], rom[1], rom[2],
// rom[3], ram, extra);
if (mapper)
{
logerror("Bankswitch not yet implemented! \n");
}
if (ram)
{
start = (( ram & 0xf0 ) >> 4) * 0x1000;
size = ( ram & 0x0f ) * 0x800;
program.install_readwrite_handler(start, start + size,
read16_delegate( FUNC( intv_state::intv_cart_ram8_r ), this),
write16_delegate( FUNC( intv_state::intv_cart_ram8_w ), this));
}
/* For now intellivoice always active
if (extra & INTELLIVOICE_MASK)
{
// tbd
}
*/
if (extra & ECS_MASK)
{
logerror("Requires ECS Module\n");
}
for (j = 0; j < 4; j++)
{
start = (( rom[j] & 0xf0 ) >> 4) * 0x1000;
size = ( rom[j] & 0x0f ) * 0x800;
/* some cart has to be loaded to 0x4800, but none goes to 0x4000. Hence, we use */
/* 0x04 << 4 in extrainfo (to reduce the stored values) and fix the value here. */
if (start == 0x4000) start += 0x800;
// logerror("step %d: %d %d \n", j, start / 0x1000, size / 0x1000);
for (i = 0; i < size; i++ )
{
image.fread( &low_byte, 1);
memory[((start + i) << 1) + 1] = low_byte;
image.fread( &high_byte, 1);
memory[(start + i) << 1] = high_byte;
}
}
}
return IMAGE_INIT_PASS;
}
}
DEVICE_IMAGE_LOAD_MEMBER( intv_state, intv_cart )
{
if (image.software_entry() == NULL)
return intv_load_rom_file(image);
else
{
UINT16 offset[] = {0x4800, 0x5000, 0x6000, 0x7000, 0x9000, 0xa000, 0xc000, 0xd000, 0xf000};
const char* region_name[] = {"4800", "5000", "6000", "7000", "9000", "A000", "C000", "D000", "F000"};
UINT8 *memory = m_region_maincpu->base();
address_space &program = m_maincpu->space(AS_PROGRAM);
UINT32 size=0;
UINT16 address = 0;
UINT8 *region;
for(int i = 0; i < 9; i++)
{
address = offset[i];
size = image.get_software_region_length(region_name[i]);
if (size)
{
region = image.get_software_region(region_name[i]);
for (int j = 0; j < (size>>1); j++)
{
memory[((address + j) << 1) + 1] = region[2*j];
memory[(address + j) << 1] = region[2*j+1];
}
}
}
// deal with wsmlb paged rom
size = image.get_software_region_length("F000_bank1");
if (size && m_region_ecs_rom) // only load if ecs is plugged in (should probably be done a different way)
{
UINT8 *ecs_rom_region = m_region_ecs_rom->base();
region = image.get_software_region("F000_bank1");
for (int j = 0; j < (size>>1); j++)
{
ecs_rom_region[((address + j) << 1) + 1] = region[2*j];
ecs_rom_region[(address + j) << 1] = region[2*j+1];
}
}
// Cartridge 8bit ram support
size = image.get_software_region_length("D000_RAM8");
if (size)
{
program.install_readwrite_handler(0xD000, 0xD000 + size,
read16_delegate( FUNC( intv_state::intv_cart_ram8_r ), this),
write16_delegate( FUNC( intv_state::intv_cart_ram8_w ), this));
}
size = image.get_software_region_length("8800_RAM8");
if (size)
{
program.install_readwrite_handler(0x8800, 0x8800 + size,
read16_delegate( FUNC( intv_state::intv_cart_ram8_r ), this),
write16_delegate( FUNC( intv_state::intv_cart_ram8_w ), this));
}
return IMAGE_INIT_PASS;
}
}
/* Set Reset and INTR/INTRM Vector */
void intv_state::machine_reset()
{
m_maincpu->set_input_line_vector(CP1610_RESET, 0x1000);
/* These are actually the same vector, and INTR is unused */
m_maincpu->set_input_line_vector(CP1610_INT_INTRM, 0x1004);
m_maincpu->set_input_line_vector(CP1610_INT_INTR, 0x1004);
/* Set initial PC */
m_maincpu->set_state_int(CP1610_R7, 0x1000);
if (m_is_ecs)
{
// ECS can switch between the maincpu and the ecs roms
m_ecs_bank_src[0] = 0; // CPU
m_ecs_bank_src[1] = 1; // ECS
m_ecs_bank_src[2] = 0; // CPU
m_ecs_bank_src[3] = 0; // CPU
m_bank_base[0] = m_region_maincpu->base();
m_bank_base[1] = m_region_ecs_rom->base();
m_bank1->set_base(m_bank_base[m_ecs_bank_src[0]] + (0x2000 << 1));
m_bank2->set_base(m_bank_base[m_ecs_bank_src[1]] + (0x7000 << 1));
m_bank3->set_base(m_bank_base[m_ecs_bank_src[2]] + (0xe000 << 1));
m_bank4->set_base(m_bank_base[m_ecs_bank_src[3]] + (0xf000 << 1));
}
}
void intv_state::machine_start()
{
// TODO: split these for intvkbd & intvecs??
for (int i = 0; i < 4; i++)
{
char str[8];
sprintf(str, "KEYPAD%i", i + 1);
m_keypad[i] = ioport(str);
}
for (int i = 0; i < 4; i++)
{
char str[6];
sprintf(str, "DISC%i", i + 1);
m_disc[i] = ioport(str);
}
for (int i = 0; i < 4; i++)
{
char str[7];
sprintf(str, "DISCX%i", i + 1);
m_discx[i] = ioport(str);
sprintf(str, "DISCY%i", i + 1);
m_discy[i] = ioport(str);
}
save_item(NAME(m_bus_copy_mode));
save_item(NAME(m_backtab_row));
save_item(NAME(m_ram16));
save_item(NAME(m_sr1_int_pending));
save_item(NAME(m_ram8));
save_item(NAME(m_cart_ram8));
// ecs
if (m_is_ecs)
{
for (int i = 0; i < 7; i++)
{
char str[9];
sprintf(str, "ECS_ROW%i", i);
m_ecs_keyboard[i] = ioport(str);
}
for (int i = 0; i < 7; i++)
{
char str[15];
sprintf(str, "ECS_SYNTH_ROW%i", i);
m_ecs_synth[i] = ioport(str);
}
save_item(NAME(m_ecs_ram8));
save_item(NAME(m_ecs_psg_porta));
save_item(NAME(m_ecs_bank_src));
machine().save().register_postload(save_prepost_delegate(FUNC(intv_state::ecs_banks_restore), this));
}
// intvkbd
if (m_is_keybd)
{
for (int i = 0; i < 10; i++)
{
char str[5];
sprintf(str, "ROW%i", i);
m_intv_keyboard[i] = ioport(str);
}
save_item(NAME(m_intvkbd_text_blanked));
save_item(NAME(m_intvkbd_keyboard_col));
save_item(NAME(m_tape_int_pending));
save_item(NAME(m_tape_interrupts_enabled));
save_item(NAME(m_tape_unknown_write));
save_item(NAME(m_tape_motor_mode));
save_item(NAME(m_tms9927_num_rows));
save_item(NAME(m_tms9927_cursor_col));
save_item(NAME(m_tms9927_cursor_row));
save_item(NAME(m_tms9927_last_row));
}
}
void intv_state::ecs_banks_restore()
{
m_bank1->set_base(m_bank_base[m_ecs_bank_src[0]] + (0x2000 << 1));
m_bank2->set_base(m_bank_base[m_ecs_bank_src[1]] + (0x7000 << 1));
m_bank3->set_base(m_bank_base[m_ecs_bank_src[2]] + (0xe000 << 1));
m_bank4->set_base(m_bank_base[m_ecs_bank_src[3]] + (0xf000 << 1));
}
TIMER_CALLBACK_MEMBER(intv_state::intv_interrupt_complete)
{
m_maincpu->set_input_line(CP1610_INT_INTRM, CLEAR_LINE);
m_bus_copy_mode = 0;
}
TIMER_CALLBACK_MEMBER(intv_state::intv_btb_fill)
{
UINT8 row = m_backtab_row;
//m_maincpu->adjust_icount(-STIC_ROW_FETCH);
for (int column = 0; column < STIC_BACKTAB_WIDTH; column++)
m_stic->write_to_btb(row, column, m_ram16[column + row * STIC_BACKTAB_WIDTH]);
m_backtab_row += 1;
}
INTERRUPT_GEN_MEMBER(intv_state::intv_interrupt)
{
int delay = m_stic->read_row_delay();
m_maincpu->set_input_line(CP1610_INT_INTRM, ASSERT_LINE);
m_sr1_int_pending = 1;
m_bus_copy_mode = 1;
m_backtab_row = 0;
m_maincpu->adjust_icount(-(12*STIC_ROW_BUSRQ+STIC_FRAME_BUSRQ)); // Account for stic cycle stealing
timer_set(m_maincpu->cycles_to_attotime(STIC_VBLANK_END), TIMER_INTV_INTERRUPT_COMPLETE);
for (int row = 0; row < STIC_BACKTAB_HEIGHT; row++)
{
timer_set(m_maincpu->cycles_to_attotime(STIC_FIRST_FETCH-STIC_FRAME_BUSRQ+STIC_CYCLES_PER_SCANLINE*STIC_Y_SCALE*delay + (STIC_CYCLES_PER_SCANLINE*STIC_Y_SCALE*STIC_CARD_HEIGHT - STIC_ROW_BUSRQ)*row), TIMER_INTV_BTB_FILL);
}
if (delay == 0)
{
m_maincpu->adjust_icount(-STIC_ROW_BUSRQ); // extra row fetch occurs if vertical delay == 0
}
m_stic->screenrefresh();
}
/* hand 0 == left, 1 == right, 2 == ECS hand controller 1, 3 == ECS hand controller 2 */
UINT8 intv_state::intv_control_r(int hand)
{
static const UINT8 keypad_table[] =
{
0xFF, 0x3F, 0x9F, 0x5F, 0xD7, 0xB7, 0x77, 0xDB,
0xBB, 0x7B, 0xDD, 0xBD, 0x7D, 0xDE, 0xBE, 0x7E
};
static const UINT8 disc_table[] =
{
0xF3, 0xE3, 0xE7, 0xF7, 0xF6, 0xE6, 0xEE, 0xFE,
0xFC, 0xEC, 0xED, 0xFD, 0xF9, 0xE9, 0xEB, 0xFB
};
static const UINT8 discyx_table[5][5] =
{
{ 0xE3, 0xF3, 0xFB, 0xEB, 0xE9 },
{ 0xE7, 0xE3, 0xFB, 0xE9, 0xF9 },
{ 0xF7, 0xF7, 0xFF, 0xFD, 0xFD },
{ 0xF6, 0xE6, 0xFE, 0xEC, 0xED },
{ 0xE6, 0xEE, 0xFE, 0xFC, 0xEC }
};
int x, y;
UINT8 rv = 0xFF;
/* keypad */
x = m_keypad[hand]->read();
for (y = 0; y < 16; y++)
{
if (x & (1 << y))
{
rv &= keypad_table[y];
}
}
switch ((m_io_options->read() >> hand) & 1)
{
case 0: /* disc == digital */
default:
x = m_disc[hand]->read();
for (y = 0; y < 16; y++)
{
if (x & (1 << y))
{
rv &= disc_table[y];
}
}
break;
case 1: /* disc == _fake_ analog */
x = m_discx[hand]->read();
y = m_discy[hand]->read();
rv &= discyx_table[y / 32][x / 32];
}
return rv;
}
READ8_MEMBER( intv_state::intv_left_control_r )
{
return intv_control_r(0);
}
READ8_MEMBER( intv_state::intv_right_control_r )
{
return intv_control_r(1);
}
READ8_MEMBER( intv_state::intv_ecs_porta_r )
{
if (m_io_ecs_cntrlsel->read() == 0)
return intv_control_r(2);
else
return 0xff; // not sure what to return here, maybe it should be last output?
}
READ8_MEMBER( intv_state::intv_ecs_portb_r )
{
switch (m_io_ecs_cntrlsel->read())
{
case 0x00: // hand controller
{
return intv_control_r(3);
}
case 0x01: // synthesizer keyboard
{
UINT8 rv = 0xff;
// return correct result if more than one bit of 0xFE is set
for (int i = 0; i < 7; i++)
{
if (BIT(m_ecs_psg_porta, i))
rv &= m_ecs_synth[i]->read();
}
return rv;
}
case 0x02: // ecs keyboard
{
UINT8 rv = 0xff;
// return correct result if more than one bit of 0xFE is set
for (int i = 0; i < 7; i++)
{
if (BIT(m_ecs_psg_porta, i))
rv &= m_ecs_keyboard[i]->read();
}
return rv;
}
default:
return 0xff;
}
}
WRITE8_MEMBER( intv_state::intv_ecs_porta_w )
{
m_ecs_psg_porta = (~data) & 0xff;
}
/* Intellivision console + keyboard component */
DEVICE_IMAGE_LOAD_MEMBER( intv_state,intvkbd_cart )
{
if (strcmp(image.device().tag(),":cart1") == 0) /* Legacy cartridge slot */
{
/* First, initialize these as empty so that the intellivision
* will think that the playcable is not attached */
UINT8 *memory = m_region_maincpu->base();
/* assume playcable is absent */
memory[0x4800 << 1] = 0xff;
memory[(0x4800 << 1) + 1] = 0xff;
if (image.software_entry() == NULL)
{
return intv_load_rom_file(image);
}
// Shouldn't we report failure here???
}
if (strcmp(image.device().tag(),":cart2") == 0) /* Keyboard component cartridge slot */
{
UINT8 *memory = m_region_keyboard->base();
/* Assume an 8K cart, like BASIC */
image.fread(&memory[0xe000], 0x2000);
}
return IMAGE_INIT_PASS;
}