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zaxxon.cpp: Add 74LS259 latches (nw)

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This commit is contained in:
AJR 2017-07-27 19:07:27 -04:00
parent 8408a79059
commit 9fccd030c5
3 changed files with 93 additions and 66 deletions
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106
src/mame/drivers/zaxxon.cpp
View File

@ -310,9 +310,9 @@ WRITE_LINE_MEMBER(zaxxon_state::vblank_int)
}
WRITE8_MEMBER(zaxxon_state::int_enable_w)
WRITE_LINE_MEMBER(zaxxon_state::int_enable_w)
{
m_int_enabled = data & 1;
m_int_enabled = state;
if (!m_int_enabled)
m_maincpu->set_input_line(0, CLEAR_LINE);
}
@ -330,7 +330,6 @@ void zaxxon_state::machine_start()
/* register for save states */
save_item(NAME(m_int_enabled));
save_item(NAME(m_coin_status));
save_item(NAME(m_coin_enable));
}
@ -382,28 +381,44 @@ CUSTOM_INPUT_MEMBER(zaxxon_state::razmataz_dial_r)
*
*************************************/
WRITE8_MEMBER(zaxxon_state::zaxxon_coin_counter_w)
WRITE8_MEMBER(zaxxon_state::zaxxon_control_w)
{
machine().bookkeeping().coin_counter_w(offset, data & 0x01);
// address decode for E0F8/E0F9 (74LS138 @ U57) has its G2B enable input in common with this latch
bool a3 = BIT(offset, 3);
m_mainlatch[1]->write_bit((a3 ? 4 : 0) | (offset & 3), BIT(data, 0));
if (a3 && !BIT(offset, 1))
bg_position_w(space, offset & 1, data);
}
WRITE_LINE_MEMBER(zaxxon_state::coin_counter_a_w)
{
machine().bookkeeping().coin_counter_w(0, state);
}
WRITE_LINE_MEMBER(zaxxon_state::coin_counter_b_w)
{
machine().bookkeeping().coin_counter_w(1, state);
}
// There is no external coin lockout circuitry; instead, the pcb simply latches
// the coin input, which then needs to be explicitly cleared by the game.
WRITE8_MEMBER(zaxxon_state::zaxxon_coin_enable_w)
// each coin input, which then needs to be explicitly cleared by the game.
// Each coin input first passes through a debounce circuit consisting of a
// LS175 quad flip-flop and LS10 3-input NAND gate, which is not emulated.
WRITE_LINE_MEMBER(zaxxon_state::coin_enable_w)
{
m_coin_enable[offset] = data & 1;
if (!m_coin_enable[offset])
m_coin_status[offset] = 0;
for (int n = 0; n < 3; n++)
if (!BIT(m_mainlatch[0]->output_state(), n))
m_coin_status[n] = 0;
}
INPUT_CHANGED_MEMBER(zaxxon_state::zaxxon_coin_inserted)
{
if (newval)
{
m_coin_status[(int)(uintptr_t)param] = m_coin_enable[(int)(uintptr_t)param];
}
if (newval && BIT(m_mainlatch[0]->output_state(), (int)(uintptr_t)param))
m_coin_status[(int)(uintptr_t)param] = 1;
}
@ -431,15 +446,9 @@ static ADDRESS_MAP_START( zaxxon_map, AS_PROGRAM, 8, zaxxon_state )
AM_RANGE(0xc002, 0xc002) AM_MIRROR(0x18fc) AM_READ_PORT("DSW02")
AM_RANGE(0xc003, 0xc003) AM_MIRROR(0x18fc) AM_READ_PORT("DSW03")
AM_RANGE(0xc100, 0xc100) AM_MIRROR(0x18ff) AM_READ_PORT("SW100")
AM_RANGE(0xc000, 0xc002) AM_MIRROR(0x18f8) AM_WRITE(zaxxon_coin_enable_w)
AM_RANGE(0xc003, 0xc004) AM_MIRROR(0x18f8) AM_WRITE(zaxxon_coin_counter_w)
AM_RANGE(0xc006, 0xc006) AM_MIRROR(0x18f8) AM_WRITE(zaxxon_flipscreen_w)
AM_RANGE(0xc000, 0xc007) AM_MIRROR(0x18f8) AM_DEVWRITE("mainlatch1", ls259_device, write_d0)
AM_RANGE(0xe03c, 0xe03f) AM_MIRROR(0x1f00) AM_DEVREADWRITE("ppi8255", i8255_device, read, write)
AM_RANGE(0xe0f0, 0xe0f0) AM_MIRROR(0x1f00) AM_WRITE(int_enable_w)
AM_RANGE(0xe0f1, 0xe0f1) AM_MIRROR(0x1f00) AM_WRITE(zaxxon_fg_color_w)
AM_RANGE(0xe0f8, 0xe0f9) AM_MIRROR(0x1f00) AM_WRITE(zaxxon_bg_position_w)
AM_RANGE(0xe0fa, 0xe0fa) AM_MIRROR(0x1f00) AM_WRITE(zaxxon_bg_color_w)
AM_RANGE(0xe0fb, 0xe0fb) AM_MIRROR(0x1f00) AM_WRITE(zaxxon_bg_enable_w)
AM_RANGE(0xe0f0, 0xe0f3) AM_MIRROR(0x1f00) AM_SELECT(0x0008) AM_WRITE(zaxxon_control_w)
ADDRESS_MAP_END
static ADDRESS_MAP_START( decrypted_opcodes_map, AS_OPCODES, 8, zaxxon_state )
@ -457,15 +466,9 @@ static ADDRESS_MAP_START( ixion_map, AS_PROGRAM, 8, zaxxon_state )
AM_RANGE(0xc002, 0xc002) AM_MIRROR(0x18fc) AM_READ_PORT("DSW02")
AM_RANGE(0xc003, 0xc003) AM_MIRROR(0x18fc) AM_READ_PORT("DSW03")
AM_RANGE(0xc100, 0xc100) AM_MIRROR(0x18ff) AM_READ_PORT("SW100")
AM_RANGE(0xc000, 0xc002) AM_MIRROR(0x18f8) AM_WRITE(zaxxon_coin_enable_w)
AM_RANGE(0xc003, 0xc004) AM_MIRROR(0x18f8) AM_WRITE(zaxxon_coin_counter_w)
AM_RANGE(0xc006, 0xc006) AM_MIRROR(0x18f8) AM_WRITE(zaxxon_flipscreen_w)
AM_RANGE(0xc000, 0xc007) AM_MIRROR(0x18f8) AM_DEVWRITE("mainlatch1", ls259_device, write_d0)
AM_RANGE(0xe03c, 0xe03c) AM_MIRROR(0x1f00) AM_DEVREADWRITE("usbsnd", usb_sound_device, status_r, data_w)
AM_RANGE(0xe0f0, 0xe0f0) AM_MIRROR(0x1f00) AM_WRITE(int_enable_w)
AM_RANGE(0xe0f1, 0xe0f1) AM_MIRROR(0x1f00) AM_WRITE(zaxxon_fg_color_w)
AM_RANGE(0xe0f8, 0xe0f9) AM_MIRROR(0x1f00) AM_WRITE(zaxxon_bg_position_w)
AM_RANGE(0xe0fa, 0xe0fa) AM_MIRROR(0x1f00) AM_WRITE(zaxxon_bg_color_w)
AM_RANGE(0xe0fb, 0xe0fb) AM_MIRROR(0x1f00) AM_WRITE(zaxxon_bg_enable_w)
AM_RANGE(0xe0f0, 0xe0f3) AM_MIRROR(0x1f00) AM_SELECT(0x0008) AM_WRITE(zaxxon_control_w)
ADDRESS_MAP_END
@ -480,16 +483,9 @@ static ADDRESS_MAP_START( congo_map, AS_PROGRAM, 8, zaxxon_state )
AM_RANGE(0xc002, 0xc002) AM_MIRROR(0x1fc4) AM_READ_PORT("DSW02")
AM_RANGE(0xc003, 0xc003) AM_MIRROR(0x1fc4) AM_READ_PORT("DSW03")
AM_RANGE(0xc008, 0xc008) AM_MIRROR(0x1fc7) AM_READ_PORT("SW100")
AM_RANGE(0xc018, 0xc01a) AM_MIRROR(0x1fc0) AM_WRITE(zaxxon_coin_enable_w)
AM_RANGE(0xc01b, 0xc01c) AM_MIRROR(0x1fc0) AM_WRITE(zaxxon_coin_counter_w)
AM_RANGE(0xc01d, 0xc01d) AM_MIRROR(0x1fc0) AM_WRITE(zaxxon_bg_enable_w)
AM_RANGE(0xc01e, 0xc01e) AM_MIRROR(0x1fc0) AM_WRITE(zaxxon_flipscreen_w)
AM_RANGE(0xc01f, 0xc01f) AM_MIRROR(0x1fc0) AM_WRITE(int_enable_w)
AM_RANGE(0xc021, 0xc021) AM_MIRROR(0x1fc0) AM_WRITE(zaxxon_fg_color_w)
AM_RANGE(0xc023, 0xc023) AM_MIRROR(0x1fc0) AM_WRITE(zaxxon_bg_color_w)
AM_RANGE(0xc026, 0xc026) AM_MIRROR(0x1fc0) AM_WRITE(congo_fg_bank_w)
AM_RANGE(0xc027, 0xc027) AM_MIRROR(0x1fc0) AM_WRITE(congo_color_bank_w)
AM_RANGE(0xc028, 0xc029) AM_MIRROR(0x1fc4) AM_WRITE(zaxxon_bg_position_w)
AM_RANGE(0xc018, 0xc01f) AM_MIRROR(0x1fc0) AM_DEVWRITE("mainlatch1", ls259_device, write_d0)
AM_RANGE(0xc020, 0xc027) AM_MIRROR(0x1fc0) AM_DEVWRITE("mainlatch2", ls259_device, write_d0)
AM_RANGE(0xc028, 0xc029) AM_MIRROR(0x1fc4) AM_WRITE(bg_position_w)
AM_RANGE(0xc030, 0xc033) AM_MIRROR(0x1fc4) AM_WRITE(congo_sprite_custom_w)
AM_RANGE(0xc038, 0xc03f) AM_MIRROR(0x1fc0) AM_DEVWRITE("soundlatch", generic_latch_8_device, write)
ADDRESS_MAP_END
@ -925,6 +921,20 @@ static MACHINE_CONFIG_START( root )
MCFG_I8255_OUT_PORTB_CB(WRITE8(zaxxon_state, zaxxon_sound_b_w))
MCFG_I8255_OUT_PORTC_CB(WRITE8(zaxxon_state, zaxxon_sound_c_w))
MCFG_DEVICE_ADD("mainlatch1", LS259, 0) // U55 on Zaxxon IC Board A
MCFG_ADDRESSABLE_LATCH_Q0_OUT_CB(WRITELINE(zaxxon_state, coin_enable_w)) // COIN EN A
MCFG_ADDRESSABLE_LATCH_Q1_OUT_CB(WRITELINE(zaxxon_state, coin_enable_w)) // COIN EN B
MCFG_ADDRESSABLE_LATCH_Q2_OUT_CB(WRITELINE(zaxxon_state, coin_enable_w)) // SERV EN
MCFG_ADDRESSABLE_LATCH_Q3_OUT_CB(WRITELINE(zaxxon_state, coin_counter_a_w)) // COUNT A
MCFG_ADDRESSABLE_LATCH_Q4_OUT_CB(WRITELINE(zaxxon_state, coin_counter_b_w)) // COUNT B
MCFG_ADDRESSABLE_LATCH_Q6_OUT_CB(WRITELINE(zaxxon_state, flipscreen_w)) // FLIP
MCFG_DEVICE_ADD("mainlatch2", LS259, 0) // U56 on Zaxxon IC Board A
MCFG_ADDRESSABLE_LATCH_Q0_OUT_CB(WRITELINE(zaxxon_state, int_enable_w)) // INTON
MCFG_ADDRESSABLE_LATCH_Q1_OUT_CB(WRITELINE(zaxxon_state, fg_color_w)) // CREF 1
MCFG_ADDRESSABLE_LATCH_Q6_OUT_CB(WRITELINE(zaxxon_state, bg_color_w)) // CREF 3
MCFG_ADDRESSABLE_LATCH_Q7_OUT_CB(WRITELINE(zaxxon_state, bg_enable_w)) // BEN
/* video hardware */
MCFG_GFXDECODE_ADD("gfxdecode", "palette", zaxxon)
MCFG_PALETTE_ADD("palette", 256)
@ -1009,6 +1019,9 @@ static MACHINE_CONFIG_DERIVED( ixion, razmataze )
MCFG_CPU_DECRYPTED_OPCODES_MAP(decrypted_opcodes_map)
MCFG_SEGACRPT_SET_DECRYPTED_TAG(":decrypted_opcodes")
MCFG_SEGACRPT_SET_SIZE(0x6000)
MCFG_DEVICE_MODIFY("mainlatch1")
MCFG_ADDRESSABLE_LATCH_Q6_OUT_CB(NOOP) // flip screen not used
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( congo, root )
@ -1016,12 +1029,21 @@ static MACHINE_CONFIG_DERIVED( congo, root )
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(congo_map)
MCFG_DEVICE_REMOVE("ppi8255")
MCFG_DEVICE_ADD("ppi8255", I8255A, 0)
MCFG_DEVICE_REPLACE("ppi8255", I8255A, 0)
MCFG_I8255_IN_PORTA_CB(DEVREAD8("soundlatch", generic_latch_8_device, read))
MCFG_I8255_OUT_PORTB_CB(WRITE8(zaxxon_state, congo_sound_b_w))
MCFG_I8255_OUT_PORTC_CB(WRITE8(zaxxon_state, congo_sound_c_w))
MCFG_DEVICE_MODIFY("mainlatch1") // U52 on Control Board
MCFG_ADDRESSABLE_LATCH_Q5_OUT_CB(WRITELINE(zaxxon_state, bg_enable_w)) // BEN
MCFG_ADDRESSABLE_LATCH_Q7_OUT_CB(WRITELINE(zaxxon_state, int_enable_w)) // INTON
MCFG_DEVICE_MODIFY("mainlatch2") // U53 on Control Board
MCFG_ADDRESSABLE_LATCH_Q0_OUT_CB(NOOP) // not used
MCFG_ADDRESSABLE_LATCH_Q3_OUT_CB(WRITELINE(zaxxon_state, bg_color_w)) // CREF 3
MCFG_ADDRESSABLE_LATCH_Q6_OUT_CB(WRITELINE(zaxxon_state, congo_fg_bank_w)) // BS
MCFG_ADDRESSABLE_LATCH_Q7_OUT_CB(WRITELINE(zaxxon_state, congo_color_bank_w)) // CBS
MCFG_CPU_ADD("audiocpu", Z80, SOUND_CLOCK)
MCFG_CPU_PROGRAM_MAP(congo_sound_map)
MCFG_CPU_PERIODIC_INT_DRIVER(zaxxon_state, irq0_line_hold, (double)SOUND_CLOCK/16/16/16/4)

27
src/mame/includes/zaxxon.h
View File

@ -5,6 +5,8 @@
Sega Zaxxon hardware
***************************************************************************/
#include "machine/74259.h"
#include "sound/samples.h"
class zaxxon_state : public driver_device
@ -13,6 +15,7 @@ public:
zaxxon_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_mainlatch(*this, "mainlatch%u", 1),
m_samples(*this, "samples"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette"),
@ -23,6 +26,7 @@ public:
m_decrypted_opcodes(*this, "decrypted_opcodes") { }
required_device<cpu_device> m_maincpu;
required_device_array<ls259_device, 2> m_mainlatch;
optional_device<samples_device> m_samples;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
@ -36,7 +40,6 @@ public:
uint8_t m_int_enabled;
uint8_t m_coin_status[3];
uint8_t m_coin_enable[3];
uint8_t m_razmataz_dial_pos[2];
uint16_t m_razmataz_counter;
@ -54,17 +57,19 @@ public:
const uint8_t *m_color_codes;
tilemap_t *m_fg_tilemap;
tilemap_t *m_bg_tilemap;
DECLARE_WRITE8_MEMBER(int_enable_w);
DECLARE_WRITE_LINE_MEMBER(int_enable_w);
DECLARE_READ8_MEMBER(razmataz_counter_r);
DECLARE_WRITE8_MEMBER(zaxxon_coin_counter_w);
DECLARE_WRITE8_MEMBER(zaxxon_coin_enable_w);
DECLARE_WRITE8_MEMBER(zaxxon_flipscreen_w);
DECLARE_WRITE8_MEMBER(zaxxon_fg_color_w);
DECLARE_WRITE8_MEMBER(zaxxon_bg_position_w);
DECLARE_WRITE8_MEMBER(zaxxon_bg_color_w);
DECLARE_WRITE8_MEMBER(zaxxon_bg_enable_w);
DECLARE_WRITE8_MEMBER(congo_fg_bank_w);
DECLARE_WRITE8_MEMBER(congo_color_bank_w);
DECLARE_WRITE8_MEMBER(zaxxon_control_w);
DECLARE_WRITE_LINE_MEMBER(coin_counter_a_w);
DECLARE_WRITE_LINE_MEMBER(coin_counter_b_w);
DECLARE_WRITE_LINE_MEMBER(coin_enable_w);
DECLARE_WRITE_LINE_MEMBER(flipscreen_w);
DECLARE_WRITE_LINE_MEMBER(fg_color_w);
DECLARE_WRITE8_MEMBER(bg_position_w);
DECLARE_WRITE_LINE_MEMBER(bg_color_w);
DECLARE_WRITE_LINE_MEMBER(bg_enable_w);
DECLARE_WRITE_LINE_MEMBER(congo_fg_bank_w);
DECLARE_WRITE_LINE_MEMBER(congo_color_bank_w);
DECLARE_WRITE8_MEMBER(zaxxon_videoram_w);
DECLARE_WRITE8_MEMBER(congo_colorram_w);
DECLARE_WRITE8_MEMBER(congo_sprite_custom_w);

26
src/mame/video/zaxxon.cpp
View File

@ -175,23 +175,23 @@ VIDEO_START_MEMBER(zaxxon_state,congo)
*
*************************************/
WRITE8_MEMBER(zaxxon_state::zaxxon_flipscreen_w)
WRITE_LINE_MEMBER(zaxxon_state::flipscreen_w)
{
/* low bit controls flip; background and sprite flip are handled at render time */
flip_screen_set_no_update(~data & 1);
flip_screen_set_no_update(!state);
m_fg_tilemap->set_flip(flip_screen() ? (TILEMAP_FLIPX | TILEMAP_FLIPY) : 0);
}
WRITE8_MEMBER(zaxxon_state::zaxxon_fg_color_w)
WRITE_LINE_MEMBER(zaxxon_state::fg_color_w)
{
/* low bit selects high color palette index */
m_fg_color = (data & 1) * 0x80;
m_fg_color = state * 0x80;
m_fg_tilemap->set_palette_offset(m_fg_color + (m_congo_color_bank << 8));
}
WRITE8_MEMBER(zaxxon_state::zaxxon_bg_position_w)
WRITE8_MEMBER(zaxxon_state::bg_position_w)
{
/* 11 bits of scroll position are stored */
if (offset == 0)
@ -201,32 +201,32 @@ WRITE8_MEMBER(zaxxon_state::zaxxon_bg_position_w)
}
WRITE8_MEMBER(zaxxon_state::zaxxon_bg_color_w)
WRITE_LINE_MEMBER(zaxxon_state::bg_color_w)
{
/* low bit selects high color palette index */
m_bg_color = (data & 1) * 0x80;
m_bg_color = state * 0x80;
}
WRITE8_MEMBER(zaxxon_state::zaxxon_bg_enable_w)
WRITE_LINE_MEMBER(zaxxon_state::bg_enable_w)
{
/* low bit enables/disables the background layer */
m_bg_enable = data & 1;
m_bg_enable = state;
}
WRITE8_MEMBER(zaxxon_state::congo_fg_bank_w)
WRITE_LINE_MEMBER(zaxxon_state::congo_fg_bank_w)
{
/* low bit controls the topmost character bit */
m_congo_fg_bank = data & 1;
m_congo_fg_bank = state;
m_fg_tilemap->mark_all_dirty();
}
WRITE8_MEMBER(zaxxon_state::congo_color_bank_w)
WRITE_LINE_MEMBER(zaxxon_state::congo_color_bank_w)
{
/* low bit controls the topmost bit into the color PROM */
m_congo_color_bank = data & 1;
m_congo_color_bank = state;
m_fg_tilemap->set_palette_offset(m_fg_color + (m_congo_color_bank << 8));
}