/
cntsteer.cpp
1294 lines (1092 loc) · 47.6 KB
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cntsteer.cpp
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// license:BSD-3-Clause
// copyright-holders:Bryan McPhail,Pierpaolo Prazzoli, David Haywood, Angelo Salese
/**************************************************************************************
Counter Steer (c) 1985 Data East Corporation
Zero Target (c) 1985 Data East Corporation
Gekitsui Oh (c) 1985 Data East Corporation
Emulation by Bryan McPhail, mish@tendril.co.uk
Improvements by Pierpaolo Prazzoli, David Haywood, Angelo Salese
todo:
both games
- correct ROZ rotation (single register that controls both);
- flip screen support;
- according to a side-by-side test, sound should be "darker" by some octaves,
likely that a sound filter is needed;
cntsteer specific:
- In Back Rotate Test, rotation is tested with the following arrangement (upper bits of rotation parameter):
04 -> 05 -> 02 -> 03 -> 00 -> 01 -> 06 -> 07 -> 04 and backwards
Anything with bit 0 set is tested from 0xff to 0, with bit 0 clear that's 0 -> 0xff, fun.
- Understand how irq communication works between CPUs. Buffer $415-6 seems involved in the protocol.
We currently have slave CPU irq hooked up to vblank, might or might not be correct.
- invert order between maincpu and subcpu, subcpu is clearly the master CPU here.
- understand why background mirroring causes wrong gfxs on title screen_device.
Probably area 0x2000-0x2fff enables tile bank bit 8 and write addresses have same mapping as reading.
A preliminary decoding is in tilelayout_swap;
- tilemap flashing when gameplay timer is running out;
- tilemap scrolling, correct only for title screen.
Maybe upper scroll bits also controls startdx/dy?
cleanup
- split into driver/video;
***************************************************************************************/
#include "emu.h"
#include "cpu/m6502/m6502.h"
#include "cpu/m6809/m6809.h"
#include "machine/gen_latch.h"
#include "sound/ay8910.h"
#include "sound/dac.h"
#include "emupal.h"
#include "screen.h"
#include "speaker.h"
#include "tilemap.h"
namespace {
class cntsteer_state : public driver_device
{
public:
cntsteer_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_spriteram(*this, "spriteram"),
m_videoram(*this, "videoram"),
m_colorram(*this, "colorram"),
m_videoram2(*this, "videoram2"),
m_maincpu(*this, "maincpu"),
m_audiocpu(*this, "audiocpu"),
m_subcpu(*this, "subcpu"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette"),
m_soundlatch(*this, "soundlatch")
{ }
/* memory pointers */
required_shared_ptr<uint8_t> m_spriteram;
required_shared_ptr<uint8_t> m_videoram;
required_shared_ptr<uint8_t> m_colorram;
required_shared_ptr<uint8_t> m_videoram2;
/* video-related */
tilemap_t *m_bg_tilemap = nullptr;
tilemap_t *m_fg_tilemap = nullptr;
int m_bg_bank = 0;
int m_bg_color_bank = 0;
int m_flipscreen = 0;
int m_scrolly = 0;
int m_scrolly_hi = 0;
int m_scrollx = 0;
int m_scrollx_hi = 0;
int m_rotation_x = 0;
int m_rotation_sign = 0;
int m_disable_roz = 0;
/* misc */
int m_nmimask = 0; // zerotrgt only
bool m_sub_nmimask = false; // counter steer only
/* devices */
required_device<cpu_device> m_maincpu;
required_device<cpu_device> m_audiocpu;
required_device<cpu_device> m_subcpu;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
required_device<generic_latch_8_device> m_soundlatch;
void zerotrgt_vregs_w(offs_t offset, uint8_t data);
void cntsteer_vregs_w(offs_t offset, uint8_t data);
void cntsteer_foreground_vram_w(offs_t offset, uint8_t data);
void cntsteer_foreground_attr_w(offs_t offset, uint8_t data);
void cntsteer_background_w(offs_t offset, uint8_t data);
uint8_t cntsteer_background_mirror_r(offs_t offset);
void gekitsui_sub_irq_ack(uint8_t data);
void cntsteer_sound_w(uint8_t data);
void zerotrgt_ctrl_w(offs_t offset, uint8_t data);
void cntsteer_sub_irq_w(uint8_t data);
void cntsteer_sub_nmi_w(uint8_t data);
void cntsteer_main_irq_w(uint8_t data);
uint8_t cntsteer_adx_r();
void nmimask_w(uint8_t data);
DECLARE_INPUT_CHANGED_MEMBER(coin_inserted);
void init_zerotrgt();
TILE_GET_INFO_MEMBER(get_bg_tile_info);
TILE_GET_INFO_MEMBER(get_fg_tile_info);
DECLARE_MACHINE_START(cntsteer);
DECLARE_MACHINE_RESET(cntsteer);
DECLARE_VIDEO_START(cntsteer);
DECLARE_MACHINE_START(zerotrgt);
DECLARE_MACHINE_RESET(zerotrgt);
DECLARE_VIDEO_START(zerotrgt);
void cntsteer_palette(palette_device &palette) const;
void zerotrgt_palette(palette_device &palette) const;
uint32_t screen_update_cntsteer(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
uint32_t screen_update_zerotrgt(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void subcpu_vblank_irq(int state);
INTERRUPT_GEN_MEMBER(sound_interrupt);
void zerotrgt_draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect);
void cntsteer_draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect);
void zerotrgt_rearrange_gfx( int romsize, int romarea );
void cntsteer(machine_config &config);
void zerotrgt(machine_config &config);
void cntsteer_cpu1_map(address_map &map);
void cntsteer_cpu2_map(address_map &map);
void gekitsui_cpu1_map(address_map &map);
void gekitsui_cpu2_map(address_map &map);
void sound_map(address_map &map);
};
void cntsteer_state::cntsteer_palette(palette_device &palette) const
{
const uint8_t *color_prom = memregion("proms")->base();
for (int i = 0; i < palette.entries(); i++)
{
// same as Chanbara
int const r = pal4bit((color_prom[i + 0x000] & 7) << 1);
int const g = pal4bit((color_prom[i + 0x100] & 7) << 1);
int const b = pal4bit((color_prom[i + 0x200] & 7) << 1);
palette.set_pen_color(i, rgb_t(r, g, b));
}
}
void cntsteer_state::zerotrgt_palette(palette_device &palette) const
{
const uint8_t *color_prom = memregion("proms")->base();
for (int i = 0; i < palette.entries(); i++)
{
int bit0, bit1, bit2;
// red component
bit0 = (color_prom[i] >> 0) & 0x01;
bit1 = (color_prom[i] >> 1) & 0x01;
bit2 = (color_prom[i] >> 2) & 0x01;
int const g = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
// green component
bit0 = (color_prom[i] >> 4) & 0x01;
bit1 = (color_prom[i] >> 5) & 0x01;
bit2 = (color_prom[i] >> 6) & 0x01;
int const r = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
// blue component
bit0 = (color_prom[i + 256] >> 0) & 0x01;
bit1 = (color_prom[i + 256] >> 1) & 0x01;
bit2 = (color_prom[i + 256] >> 2) & 0x01;
int const b = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
palette.set_pen_color(i, rgb_t(r, g, b));
}
}
TILE_GET_INFO_MEMBER(cntsteer_state::get_bg_tile_info)
{
int code = m_videoram2[tile_index];
tileinfo.set(2, code + m_bg_bank, m_bg_color_bank, 0);
}
TILE_GET_INFO_MEMBER(cntsteer_state::get_fg_tile_info)
{
int code = m_videoram[tile_index];
int attr = m_colorram[tile_index];
code |= (attr & 0x01) << 8;
tileinfo.set(0, code, 0x30 + ((attr & 0x78) >> 3), 0);
}
VIDEO_START_MEMBER(cntsteer_state,cntsteer)
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(cntsteer_state::get_bg_tile_info)), TILEMAP_SCAN_COLS, 16, 16, 64, 64);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(cntsteer_state::get_fg_tile_info)), TILEMAP_SCAN_ROWS_FLIP_X, 8, 8, 32, 32);
m_fg_tilemap->set_transparent_pen(0);
//m_bg_tilemap->set_flip(TILEMAP_FLIPX | TILEMAP_FLIPY);
}
VIDEO_START_MEMBER(cntsteer_state,zerotrgt)
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(cntsteer_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 16, 16, 64, 64);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(cntsteer_state::get_fg_tile_info)), TILEMAP_SCAN_ROWS_FLIP_X, 8, 8, 32, 32);
m_fg_tilemap->set_transparent_pen(0);
//m_bg_tilemap->set_flip(TILEMAP_FLIPX | TILEMAP_FLIPY);
}
/*
Sprite list:
[0] xxxx xxxx Y attribute
[1] xx-- ---- sprite number bank
--x- x--- color number
---x ---- double-height attribute
---- -x-- flip x (active low)
---- --x- flip y
---- ---x draw sprite flag (active low)
[2] xxxx xxxx X attribute
[3] xxxx xxxx sprite number
*/
void cntsteer_state::zerotrgt_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect )
{
int offs;
for (offs = 0; offs < 0x200; offs += 4)
{
int multi, fx, fy, sx, sy, code, color;
if ((m_spriteram[offs + 1] & 1) == 1)
continue;
code = m_spriteram[offs + 3] + ((m_spriteram[offs + 1] & 0xc0) << 2);
sx = (m_spriteram[offs + 2]);
sy = 0xf0 - m_spriteram[offs];
color = 0x10 + ((m_spriteram[offs + 1] & 0x20) >> 4) + ((m_spriteram[offs + 1] & 0x8)>>3);
fx = !(m_spriteram[offs + 1] & 0x04);
fy = (m_spriteram[offs + 1] & 0x02);
multi = m_spriteram[offs + 1] & 0x10;
if (m_flipscreen)
{
sy = 240 - sy;
sx = 240 - sx;
if (fx) fx = 0;
else fx = 1;
//sy2 = sy - 16;
}
if (multi)
{
if (fy)
{
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, fx, fy, sx, sy, 0);
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code + 1, color, fx, fy, sx, sy - 16, 0);
}
else
{
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, fx, fy, sx, sy - 16, 0);
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code + 1, color, fx, fy, sx, sy, 0);
}
}
else
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, fx, fy, sx, sy, 0);
}
}
/*
[00] --x- ---- magnify
---x ---- double height
---- -x-- flipy
[80] -xxx ---- palette entry
---- --xx upper tile bank
*/
void cntsteer_state::cntsteer_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect )
{
int offs;
for (offs = 0; offs < 0x80; offs += 4)
{
int multi, fx, fy, sx, sy, code, color, magnify, region, tile_size;
if ((m_spriteram[offs + 0] & 1) == 0)
continue;
code = m_spriteram[offs + 1] + ((m_spriteram[offs + 0x80] & 0x03) << 8);
sx = 0x100 - m_spriteram[offs + 3];
sy = 0xe8 - m_spriteram[offs + 2];
color = 0x10 + ((m_spriteram[offs + 0x80] & 0x70) >> 4);
fx = (m_spriteram[offs + 0] & 0x04);
fy = (m_spriteram[offs + 0] & 0x02);
multi = m_spriteram[offs + 0] & 0x10;
magnify = (m_spriteram[offs + 0] & 0x20) >> 5;
region = magnify ? 3 : 1;
tile_size = magnify ? 32 : 16;
if (m_flipscreen)
{
sy = 240 - sy;
sx = 240 - sx;
if (fx) fx = 0;
else fx = 1;
//sy2 = sy - 16;
}
if (multi)
{
if (fy)
{
m_gfxdecode->gfx(region)->transpen(bitmap,cliprect, code, color, fx, fy, sx, sy, 0);
m_gfxdecode->gfx(region)->transpen(bitmap,cliprect, code + 1, color, fx, fy, sx, sy - tile_size, 0);
}
else
{
m_gfxdecode->gfx(region)->transpen(bitmap,cliprect, code, color, fx, fy, sx, sy - tile_size, 0);
m_gfxdecode->gfx(region)->transpen(bitmap,cliprect, code + 1, color, fx, fy, sx, sy, 0);
}
}
else
m_gfxdecode->gfx(region)->transpen(bitmap,cliprect, code, color, fx, fy, sx, sy, 0);
}
}
uint32_t cntsteer_state::screen_update_zerotrgt(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
if (m_disable_roz)
bitmap.fill(m_palette->pen(8 * m_bg_color_bank), cliprect);
else
{
int p1, p2, p3, p4;
int rot_val, x, y;
rot_val = m_rotation_sign ? (-m_rotation_x) : (m_rotation_x);
// popmessage("%d %02x %02x", rot_val, m_rotation_sign, m_rotation_x);
if (rot_val > 90) { rot_val = 90; }
if (rot_val < -90) { rot_val = -90; }
/*
(u, v) = (a + cx + dy, b - dx + cy) when (x, y)=screen and (u, v) = tilemap
*/
/*
1
0----|----0
-1
0
0----|----1
0
*/
/*65536*z*cos(a), 65536*z*sin(a), -65536*z*sin(a), 65536*z*cos(a)*/
p1 = -65536 * 1 * cos(2 * M_PI * (rot_val) / 1024);
p2 = -65536 * 1 * sin(2 * M_PI * (rot_val) / 1024);
p3 = 65536 * 1 * sin(2 * M_PI * (rot_val) / 1024);
p4 = -65536 * 1 * cos(2 * M_PI * (rot_val) / 1024);
x = -256 - (m_scrollx | m_scrollx_hi);
y = 256 + (m_scrolly | m_scrolly_hi);
m_bg_tilemap->draw_roz(screen, bitmap, cliprect,
(x << 16), (y << 16),
p1, p2,
p3, p4,
1,
0, 0);
}
zerotrgt_draw_sprites(bitmap, cliprect);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
return 0;
}
uint32_t cntsteer_state::screen_update_cntsteer(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
if (m_disable_roz)
bitmap.fill(m_palette->pen(8 * m_bg_color_bank), cliprect);
else
{
int p1, p2, p3, p4;
int rot_val, x, y;
rot_val = (m_rotation_x) | ((m_rotation_sign & 3) << 8);
rot_val = (m_rotation_sign & 4) ? (rot_val) : (-rot_val);
// popmessage("%d %02x %02x", rot_val, m_rotation_sign, m_rotation_x);
/*
(u, v) = (a + cx + dy, b - dx + cy) when (x, y)=screen and (u, v) = tilemap
*/
/*
1
0----|----0
-1
0
0----|----1
0
*/
/*65536*z*cos(a), 65536*z*sin(a), -65536*z*sin(a), 65536*z*cos(a)*/
p1 = -65536 * 1 * cos(2 * M_PI * (rot_val) / 1024);
p2 = -65536 * 1 * sin(2 * M_PI * (rot_val) / 1024);
p3 = 65536 * 1 * sin(2 * M_PI * (rot_val) / 1024);
p4 = -65536 * 1 * cos(2 * M_PI * (rot_val) / 1024);
x = 256 + (m_scrollx | m_scrollx_hi);
y = 256 - (m_scrolly | m_scrolly_hi);
m_bg_tilemap->draw_roz(screen, bitmap, cliprect,
(x << 16), (y << 16),
p1, p2,
p3, p4,
1,
0, 0);
}
cntsteer_draw_sprites(bitmap, cliprect);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
return 0;
}
/*
[0] = scroll y
[1] = scroll x
[2] = -x-- ---- disable roz layer (Used when you lose a life / start a new play)
--xx ---- bg bank
---- -xxx bg color bank
[3] = xx-- ---- high word scrolling x bits
--xx ---- high word scrolling y bits
---- -x-- flip screen bit (inverted)
---- ---x rotation sign (landscape should be turning right (0) == / , turning left (1) == \)
[4] = xxxx xxxx rotation factor?
*/
void cntsteer_state::zerotrgt_vregs_w(offs_t offset, uint8_t data)
{
// static uint8_t test[5];
// test[offset] = data;
// popmessage("%02x %02x %02x %02x %02x",test[0],test[1],test[2],test[3],test[4]);
switch (offset)
{
case 0: m_scrolly = data; break;
case 1: m_scrollx = data; break;
case 2: m_bg_bank = (data & 0x30) << 4;
m_bg_color_bank = (data & 7);
m_disable_roz = (data & 0x40);
m_bg_tilemap->mark_all_dirty();
break;
case 3: m_rotation_sign = (data & 1);
flip_screen_set(!(data & 4));
m_scrolly_hi = (data & 0x30) << 4;
m_scrollx_hi = (data & 0xc0) << 2;
break;
case 4: m_rotation_x = data; break;
}
}
void cntsteer_state::cntsteer_vregs_w(offs_t offset, uint8_t data)
{
// static uint8_t test[5];
// test[offset] = data;
// popmessage("%02x %02x %02x %02x %02x",test[0],test[1],test[2],test[3],test[4]);
switch(offset)
{
case 0: m_scrolly = data; break;
case 1: m_scrollx = data; break;
case 2: m_bg_bank = (data & 0x01) << 9;
m_bg_color_bank = (data & 7);
m_bg_tilemap->mark_all_dirty();
break;
case 3: m_rotation_sign = (data & 7);
m_disable_roz = 0; //(~data & 0x08);
m_maincpu->set_input_line(INPUT_LINE_RESET, data & 8 ? CLEAR_LINE : ASSERT_LINE);
m_scrolly_hi = (data & 0x30) << 4;
m_scrollx_hi = (data & 0xc0) << 2;
break;
case 4: m_rotation_x = data; break;
}
}
void cntsteer_state::cntsteer_foreground_vram_w(offs_t offset, uint8_t data)
{
m_videoram[offset] = data;
m_fg_tilemap->mark_tile_dirty(offset);
}
void cntsteer_state::cntsteer_foreground_attr_w(offs_t offset, uint8_t data)
{
m_colorram[offset] = data;
m_fg_tilemap->mark_tile_dirty(offset);
}
void cntsteer_state::cntsteer_background_w(offs_t offset, uint8_t data)
{
m_videoram2[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
/* checks area 0x2000-0x2fff with this address config. */
uint8_t cntsteer_state::cntsteer_background_mirror_r(offs_t offset)
{
return m_videoram2[bitswap<16>(offset,15,14,13,12,5,4,3,2,1,0,11,10,9,8,7,6)];
}
// TODO: on write prolly selects bit 8 of tile bank (which needs better decoding too)
/*************************************
*
* CPU comms
*
*************************************/
void cntsteer_state::gekitsui_sub_irq_ack(uint8_t data)
{
m_subcpu->set_input_line(M6809_IRQ_LINE, CLEAR_LINE);
}
void cntsteer_state::cntsteer_sound_w(uint8_t data)
{
m_soundlatch->write(data);
m_audiocpu->set_input_line(0, HOLD_LINE);
}
void cntsteer_state::zerotrgt_ctrl_w(offs_t offset, uint8_t data)
{
/*TODO: check this.*/
logerror("CTRL: %04x: %04x: %04x\n", m_maincpu->pc(), offset, data);
// if (offset == 0) m_subcpu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
// Wrong - bits 0 & 1 used on this
if (offset == 1) m_subcpu->set_input_line(M6809_IRQ_LINE, ASSERT_LINE);
// if (offset == 2) m_subcpu->set_input_line(INPUT_LINE_RESET, CLEAR_LINE);
}
void cntsteer_state::cntsteer_sub_irq_w(uint8_t data)
{
//m_subcpu->set_input_line(M6809_IRQ_LINE, ASSERT_LINE);
// printf("%02x IRQ\n", data);
}
void cntsteer_state::cntsteer_sub_nmi_w(uint8_t data)
{
m_maincpu->set_input_line(M6809_IRQ_LINE, CLEAR_LINE);
// popmessage("%02x", data);
}
void cntsteer_state::cntsteer_main_irq_w(uint8_t data)
{
m_maincpu->set_input_line(M6809_IRQ_LINE, ASSERT_LINE);
}
/* Convert weird input handling with MAME standards.*/
uint8_t cntsteer_state::cntsteer_adx_r()
{
uint8_t res = 0, adx_val;
adx_val = ioport("AN_STEERING")->read();
if (adx_val >= 0x70 && adx_val <= 0x90)
res = 0xff;
else if (adx_val > 0x90)
{
if (adx_val > 0x90 && adx_val <= 0xb0)
res = 0xfe;
else if (adx_val > 0xb0 && adx_val <= 0xd0)
res = 0xfc;
else if (adx_val > 0xd0 && adx_val <= 0xf0)
res = 0xf8;
else if (adx_val > 0xf0)
res = 0xf0;
}
else
{
if (adx_val >= 0x50 && adx_val < 0x70)
res = 0xef;
else if (adx_val >= 0x30 && adx_val < 0x50)
res = 0xcf;
else if (adx_val >= 0x10 && adx_val < 0x30)
res = 0x8f;
else if (adx_val < 0x10)
res = 0x0f;
}
//popmessage("%02x", adx_val);
return res;
}
/***************************************************************************/
void cntsteer_state::gekitsui_cpu1_map(address_map &map)
{
map(0x0000, 0x0fff).ram().share("share1");
map(0x1000, 0x11ff).ram().share("spriteram");
map(0x1200, 0x1fff).ram();
map(0x2000, 0x23ff).ram().w(FUNC(cntsteer_state::cntsteer_foreground_vram_w)).share("videoram");
map(0x2400, 0x27ff).ram().w(FUNC(cntsteer_state::cntsteer_foreground_attr_w)).share("colorram");
map(0x3000, 0x3003).w(FUNC(cntsteer_state::zerotrgt_ctrl_w));
map(0x8000, 0xffff).rom();
}
void cntsteer_state::gekitsui_cpu2_map(address_map &map)
{
map(0x0000, 0x0fff).ram().share("share1");
map(0x1000, 0x1fff).ram().w(FUNC(cntsteer_state::cntsteer_background_w)).share("videoram2");
map(0x3000, 0x3000).portr("DSW0");
map(0x3001, 0x3001).portr("P2");
map(0x3002, 0x3002).portr("P1");
map(0x3003, 0x3003).portr("COINS");
map(0x3000, 0x3004).w(FUNC(cntsteer_state::zerotrgt_vregs_w));
map(0x3005, 0x3005).w(FUNC(cntsteer_state::gekitsui_sub_irq_ack));
map(0x3007, 0x3007).w(FUNC(cntsteer_state::cntsteer_sound_w));
map(0x4000, 0xffff).rom();
}
void cntsteer_state::cntsteer_cpu1_map(address_map &map)
{
map(0x0000, 0x0fff).ram().share("share1");
map(0x1000, 0x11ff).ram().share("spriteram");
map(0x2000, 0x23ff).ram().w(FUNC(cntsteer_state::cntsteer_foreground_vram_w)).share("videoram");
map(0x2400, 0x27ff).ram().w(FUNC(cntsteer_state::cntsteer_foreground_attr_w)).share("colorram");
map(0x3000, 0x3000).w(FUNC(cntsteer_state::cntsteer_sub_nmi_w));
map(0x3001, 0x3001).w(FUNC(cntsteer_state::cntsteer_sub_irq_w));
map(0x8000, 0xffff).rom();
}
void cntsteer_state::cntsteer_cpu2_map(address_map &map)
{
map(0x0000, 0x0fff).ram().share("share1");
map(0x1000, 0x1fff).ram().w(FUNC(cntsteer_state::cntsteer_background_w)).share("videoram2");
map(0x2000, 0x2fff).rw(FUNC(cntsteer_state::cntsteer_background_mirror_r), FUNC(cntsteer_state::cntsteer_background_w));
map(0x3000, 0x3000).portr("DSW0");
map(0x3001, 0x3001).r(FUNC(cntsteer_state::cntsteer_adx_r));
map(0x3002, 0x3002).portr("P1");
map(0x3003, 0x3003).portr("COINS");
map(0x3000, 0x3004).w(FUNC(cntsteer_state::cntsteer_vregs_w));
map(0x3005, 0x3005).w(FUNC(cntsteer_state::gekitsui_sub_irq_ack));
map(0x3006, 0x3006).w(FUNC(cntsteer_state::cntsteer_main_irq_w));
map(0x3007, 0x3007).w(FUNC(cntsteer_state::cntsteer_sound_w));
map(0x3007, 0x3007).nopr(); //m6809 bug.
map(0x4000, 0xffff).rom();
}
/***************************************************************************/
void cntsteer_state::nmimask_w(uint8_t data)
{
m_nmimask = data & 0x80;
}
void cntsteer_state::subcpu_vblank_irq(int state)
{
// TODO: hack for bus request: DP is enabled with 0xff only during POST, and disabled once that critical operations are performed.
// That's my best guess so far about how Slave is supposed to stop execution on Master CPU, the lack of any realistic write
// between these operations brings us to this.
// Game currently returns error on MIX CPU RAM because halt-ing BACK CPU doesn't happen when it should of course ...
// uint8_t dp_r = (uint8_t)m_subcpu->state_int(M6809_DP);
// m_maincpu->set_input_line(INPUT_LINE_HALT, dp_r ? ASSERT_LINE : CLEAR_LINE);
if (state)
m_subcpu->set_input_line(M6809_IRQ_LINE, ASSERT_LINE);
}
INTERRUPT_GEN_MEMBER(cntsteer_state::sound_interrupt)
{
if (!m_nmimask)
device.execute().pulse_input_line(INPUT_LINE_NMI, attotime::zero);
}
void cntsteer_state::sound_map(address_map &map)
{
map(0x0000, 0x01ff).ram();
// map(0x1000, 0x1000).w(FUNC(cntsteer_state::nmiack_w));
map(0x2000, 0x2000).w("ay1", FUNC(ym2149_device::data_w));
map(0x4000, 0x4000).w("ay1", FUNC(ym2149_device::address_w));
map(0x6000, 0x6000).w("ay2", FUNC(ym2149_device::data_w));
map(0x8000, 0x8000).w("ay2", FUNC(ym2149_device::address_w));
map(0xa000, 0xa000).r(m_soundlatch, FUNC(generic_latch_8_device::read));
map(0xd000, 0xd000).w(FUNC(cntsteer_state::nmimask_w));
map(0xe000, 0xffff).rom();
}
/***************************************************************************/
static INPUT_PORTS_START( zerotrgt )
PORT_START("DSW0")
PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW1:1,2")
PORT_DIPSETTING( 0x03, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x02, DEF_STR( 1C_3C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 1C_4C ) )
PORT_DIPSETTING( 0x00, DEF_STR( 1C_6C ) )
PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW1:3,4")
PORT_DIPSETTING( 0x00, DEF_STR( 4C_1C ) )
PORT_DIPSETTING( 0x04, DEF_STR( 3C_1C ) )
PORT_DIPSETTING( 0x08, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x0c, DEF_STR( 1C_1C ) )
PORT_DIPNAME( 0x10, 0x10, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SW1:5")
PORT_DIPSETTING( 0x00, DEF_STR( Upright ) )
PORT_DIPSETTING( 0x10, DEF_STR( Cocktail ) )
PORT_DIPNAME( 0x20, 0x20, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW1:6")
PORT_DIPSETTING( 0x20, DEF_STR( Normal ) )
PORT_DIPSETTING( 0x00, DEF_STR( Hard ) )
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW1:7")
PORT_DIPSETTING( 0x40, "3" )
PORT_DIPSETTING( 0x00, "5" )
PORT_DIPNAME( 0x80, 0x80, DEF_STR( Bonus_Life ) ) PORT_DIPLOCATION("SW1:8")
PORT_DIPSETTING( 0x80, "30K only" )
PORT_DIPSETTING( 0x00, "30K and 100K" )
PORT_START("P2")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
PORT_BIT( 0x60, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen")
PORT_START("P1")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START2 )
PORT_START("COINS")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SERVICE1 )
PORT_BIT( 0xf8, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END
static INPUT_PORTS_START( zerotrgta )
PORT_INCLUDE( zerotrgt )
PORT_MODIFY("DSW0")
PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW1:1,2")
PORT_DIPSETTING( 0x00, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x03, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x02, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 1C_3C ) )
PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW1:3,4")
PORT_DIPSETTING( 0x00, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x0c, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x08, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x04, DEF_STR( 1C_3C ) )
INPUT_PORTS_END
INPUT_CHANGED_MEMBER(cntsteer_state::coin_inserted)
{
m_subcpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE);
}
static INPUT_PORTS_START( cntsteer )
PORT_START("P1")
PORT_BIT( 0x0f, 0x00, IPT_PEDAL ) PORT_MINMAX(0x00,0x0f) PORT_SENSITIVITY(25) PORT_KEYDELTA(10) //todo
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START1 )
PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_START("AN_STEERING")
PORT_BIT( 0xff, 0x80, IPT_AD_STICK_X ) PORT_MINMAX(0x01,0xff) PORT_SENSITIVITY(10) PORT_KEYDELTA(2)
PORT_START("COINS")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(1) PORT_CHANGED_MEMBER(DEVICE_SELF, cntsteer_state,coin_inserted, 0)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_IMPULSE(1) PORT_CHANGED_MEMBER(DEVICE_SELF, cntsteer_state,coin_inserted, 0)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SERVICE1 ) PORT_IMPULSE(1) PORT_CHANGED_MEMBER(DEVICE_SELF, cntsteer_state,coin_inserted, 0)
PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) //unused
PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen")
PORT_START("DSW0")
PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW1:1,2")
PORT_DIPSETTING( 0x00, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x03, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x02, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 1C_3C ) )
PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW1:3,4")
PORT_DIPSETTING( 0x00, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x0c, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x08, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x04, DEF_STR( 1C_3C ) )
PORT_DIPNAME( 0x10, 0x10, DEF_STR( Service_Mode ) ) PORT_DIPLOCATION("SW1:5")
PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) ) PORT_DIPLOCATION("SW1:6")
PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW1:7")
PORT_DIPSETTING( 0x40, DEF_STR( Normal ) )
PORT_DIPSETTING( 0x00, DEF_STR( Hard ) )
PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) PORT_DIPLOCATION("SW1:8")
PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
INPUT_PORTS_END
/***************************************************************************/
static const gfx_layout cntsteer_charlayout =
{
8,8, /* 8*8 characters */
0x200,
2, /* 2 bits per pixel */
{ 0, 4 }, /* the two bitplanes for 4 pixels are packed into one byte */
{ 0, 1, 2, 3, 0x800*8+0, 0x800*8+1, 0x800*8+2, 0x800*8+3 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
8*8 /* every char takes 8 consecutive bytes */
};
static const gfx_layout zerotrgt_charlayout =
{
8,8,
0x200,
2,
{ 0,4 },
{ 0, 1, 2, 3, 1024*8*8+0, 1024*8*8+1, 1024*8*8+2, 1024*8*8+3 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
8*8 /* every tile takes 32 consecutive bytes */
};
static const gfx_layout sprites =
{
16,16,
RGN_FRAC(1,3),
3,
{ RGN_FRAC(0,3), RGN_FRAC(1,3), RGN_FRAC(2,3) },
{ 16*8, 1+16*8, 2+16*8, 3+16*8, 4+16*8, 5+16*8, 6+16*8, 7+16*8,
0, 1, 2, 3, 4, 5, 6, 7 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
8*8, 9*8,10*8,11*8,12*8,13*8,14*8,15*8 },
16*16
};
static const gfx_layout sprites_magnify =
{
16,32,
RGN_FRAC(1,3),
3,
{ RGN_FRAC(0,3), RGN_FRAC(1,3), RGN_FRAC(2,3) },
{ 16*8, 1+16*8, 2+16*8, 3+16*8, 4+16*8, 5+16*8, 6+16*8, 7+16*8,
0, 1, 2, 3, 4, 5, 6, 7 },
{ 0*8, 0*8, 1*8, 1*8, 2*8, 2*8, 3*8, 3*8,
4*8, 4*8, 5*8, 5*8, 6*8, 6*8, 7*8, 7*8,
8*8, 8*8, 9*8, 9*8, 10*8,10*8,11*8,11*8,
12*8,12*8,13*8,13*8,14*8,14*8,15*8,15*8 },
16*16
};
static const gfx_layout tilelayout =
{
16,16,
0x400,
3, /* 3 bits per pixel */
{ RGN_FRAC(4,8)+4, 0, 4 },
{ 3, 2, 1, 0, 11, 10, 9 , 8, 19, 18, 17,16, 27, 26, 25, 24 },
{
RGN_FRAC(0,8)+0*8, RGN_FRAC(1,8)+0*8, RGN_FRAC(2,8)+0*8, RGN_FRAC(3,8)+0*8,
RGN_FRAC(0,8)+4*8, RGN_FRAC(1,8)+4*8, RGN_FRAC(2,8)+4*8, RGN_FRAC(3,8)+4*8,
RGN_FRAC(0,8)+8*8, RGN_FRAC(1,8)+8*8, RGN_FRAC(2,8)+8*8, RGN_FRAC(3,8)+8*8,
RGN_FRAC(0,8)+12*8, RGN_FRAC(1,8)+12*8,RGN_FRAC(2,8)+12*8,RGN_FRAC(3,8)+12*8
},
8*16
};
static const gfx_layout tilelayout_swap =
{
16,16,
0x400,
3, /* 3 bits per pixel */
{ RGN_FRAC(4,8)+4, 0, 4 },
{
RGN_FRAC(0,8)+0*8, RGN_FRAC(1,8)+0*8, RGN_FRAC(2,8)+0*8, RGN_FRAC(3,8)+0*8,
RGN_FRAC(0,8)+4*8, RGN_FRAC(1,8)+4*8, RGN_FRAC(2,8)+4*8, RGN_FRAC(3,8)+4*8,
RGN_FRAC(0,8)+8*8, RGN_FRAC(1,8)+8*8, RGN_FRAC(2,8)+8*8, RGN_FRAC(3,8)+8*8,
RGN_FRAC(0,8)+12*8, RGN_FRAC(1,8)+12*8,RGN_FRAC(2,8)+12*8,RGN_FRAC(3,8)+12*8
},
{ 27, 26, 25, 24, 19, 18, 17, 16, 11, 10, 9, 8, 3, 2, 1, 0 },
8*16
};
static GFXDECODE_START( gfx_cntsteer )
GFXDECODE_ENTRY( "gfx1", 0x00000, cntsteer_charlayout, 0, 0x40 )
GFXDECODE_ENTRY( "gfx2", 0x00000, sprites, 0, 0x20 )
GFXDECODE_ENTRY( "gfx3", 0x00000, tilelayout, 0, 0x20 )
GFXDECODE_ENTRY( "gfx2", 0x00000, sprites_magnify, 0, 0x20 )
GFXDECODE_ENTRY( "gfx3", 0x00000, tilelayout_swap, 0, 0x20 )
GFXDECODE_END
static GFXDECODE_START( gfx_zerotrgt )
GFXDECODE_ENTRY( "gfx1", 0x00000, zerotrgt_charlayout, 0, 0x40 )
GFXDECODE_ENTRY( "gfx2", 0x00000, sprites, 0, 0x20 )
GFXDECODE_ENTRY( "gfx3", 0x00000, tilelayout, 0, 0x20 )
GFXDECODE_END
/***************************************************************************/
MACHINE_START_MEMBER(cntsteer_state,cntsteer)
{
save_item(NAME(m_flipscreen));
save_item(NAME(m_bg_bank));
save_item(NAME(m_scrolly));
save_item(NAME(m_scrollx));
save_item(NAME(m_scrollx_hi));
save_item(NAME(m_scrolly_hi));
save_item(NAME(m_rotation_x));
save_item(NAME(m_rotation_sign));
save_item(NAME(m_bg_color_bank));
save_item(NAME(m_disable_roz));
}
MACHINE_START_MEMBER(cntsteer_state,zerotrgt)
{
save_item(NAME(m_nmimask));
MACHINE_START_CALL_MEMBER(cntsteer);
}
MACHINE_RESET_MEMBER(cntsteer_state,zerotrgt)
{
m_flipscreen = 0;
m_bg_bank = 0;
m_scrolly = 0;
m_scrollx = 0;
m_scrollx_hi = 0;
m_scrolly_hi = 0;
m_rotation_x = 0;
m_rotation_sign = 0;
m_bg_color_bank = 0;
m_disable_roz = 0;
m_nmimask = 0;
}
MACHINE_RESET_MEMBER(cntsteer_state,cntsteer)
{
m_maincpu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
MACHINE_RESET_CALL_MEMBER(zerotrgt);
}
void cntsteer_state::cntsteer(machine_config &config)
{
/* basic machine hardware */
MC6809E(config, m_maincpu, 2000000); /* MC68B09E */
m_maincpu->set_addrmap(AS_PROGRAM, &cntsteer_state::cntsteer_cpu1_map);
MC6809E(config, m_subcpu, 2000000); /* MC68B09E */
m_subcpu->set_addrmap(AS_PROGRAM, &cntsteer_state::cntsteer_cpu2_map);
// m_subcpu->set_disable();
M6502(config, m_audiocpu, XTAL(12'000'000)/8); /* ? */
m_audiocpu->set_addrmap(AS_PROGRAM, &cntsteer_state::sound_map);
m_audiocpu->set_periodic_int(FUNC(cntsteer_state::sound_interrupt), attotime::from_hz(960));
MCFG_MACHINE_START_OVERRIDE(cntsteer_state,cntsteer)
MCFG_MACHINE_RESET_OVERRIDE(cntsteer_state,cntsteer)
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_refresh_hz(60);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500) /* not accurate */);