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-rw-r--r--src/mame/drivers/schick.cpp648
1 files changed, 0 insertions, 648 deletions
diff --git a/src/mame/drivers/schick.cpp b/src/mame/drivers/schick.cpp
deleted file mode 100644
index e4abf749354..00000000000
--- a/src/mame/drivers/schick.cpp
+++ /dev/null
@@ -1,648 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:David Haywood, Nicola Salmoria
-
-/* a strange hack of Pengo, seems to be built on top of the 'Penta' bootleg
- it recycles encryption from there + adds an additional layer of encryption
- has 4bpp tils instead of 2bpp, bombjack sound system
- and possibly extra protection (conditional jumps to areas where there is no ROM data)
- colours from undumped? proms (doesn't seem to be a palette RAM even with the extended 4bpp tiles)
-
- the changes are extensive enough to keep it here in its own driver
-*/
-
-#include "emu.h"
-
-#include "cpu/z80/z80.h"
-#include "machine/74259.h"
-#include "machine/gen_latch.h"
-#include "machine/watchdog.h"
-#include "sound/ay8910.h"
-#include "emupal.h"
-#include "tilemap.h"
-#include "screen.h"
-#include "speaker.h"
-#include "video/resnet.h"
-
-
-class schick_state : public driver_device
-{
-public:
- schick_state(const machine_config &mconfig, device_type type, const char *tag) :
- driver_device(mconfig, type, tag),
- m_maincpu(*this, "maincpu"),
- m_decrypted_opcodes(*this, "decrypted_opcodes"),
- m_latch(*this, "latch"),
- m_watchdog(*this, "watchdog"),
- m_spriteram(*this, "spriteram"),
- m_spriteram2(*this, "spriteram2"),
- m_videoram(*this, "videoram"),
- m_colorram(*this, "colorram"),
- m_gfxdecode(*this, "gfxdecode"),
- m_palette(*this, "palette"),
- m_irq_mask(0)
- {}
-
- void schick(machine_config &config);
-
- void init_schick();
-
-private:
- DECLARE_WRITE_LINE_MEMBER(coin_counter_1_w);
- DECLARE_WRITE_LINE_MEMBER(coin_counter_2_w);
- DECLARE_WRITE_LINE_MEMBER(irq_mask_w);
- DECLARE_WRITE_LINE_MEMBER(vblank_irq);
-
- DECLARE_WRITE_LINE_MEMBER(schick_palettebank_w);
- DECLARE_WRITE_LINE_MEMBER(schick_colortablebank_w);
- DECLARE_WRITE_LINE_MEMBER(schick_gfxbank_w);
-
- TILEMAP_MAPPER_MEMBER(schick_scan_rows);
- TILE_GET_INFO_MEMBER(schick_get_tile_info);
-
- void decode_penta(int end, int nodecend);
- void decode_schick_extra(int size, uint8_t* rom);
-
- void schick_videoram_w(offs_t offset, uint8_t data);
- void schick_colorram_w(offs_t offset, uint8_t data);
-
- required_device<cpu_device> m_maincpu;
- optional_shared_ptr<uint8_t> m_decrypted_opcodes;
- optional_device<ls259_device> m_latch;
- required_device<watchdog_timer_device> m_watchdog;
- optional_shared_ptr<uint8_t> m_spriteram;
- optional_shared_ptr<uint8_t> m_spriteram2;
- required_shared_ptr<uint8_t> m_videoram;
- optional_shared_ptr<uint8_t> m_colorram;
- required_device<gfxdecode_device> m_gfxdecode;
- required_device<palette_device> m_palette;
-
- void schick_portmap(address_map &map);
- void schick_decrypted_opcodes_map(address_map &map);
- void schick_map(address_map &map);
- void schick_audio_map(address_map &map);
- void schick_audio_io_map(address_map &map);
-
- uint8_t m_irq_mask;
- uint32_t screen_update_schick(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
- DECLARE_VIDEO_START(schick);
-
- tilemap_t *m_bg_tilemap;
- uint8_t m_charbank;
- uint8_t m_spritebank;
- uint8_t m_palettebank;
- uint8_t m_colortablebank;
- uint8_t m_flipscreen;
- uint8_t m_bgpriority;
- uint8_t m_inv_spr;
-
- uint8_t schick_hack_r()
- {
- return 0xff;
- }
-};
-
-#define MASTER_CLOCK (18432000)
-
-#define PIXEL_CLOCK (MASTER_CLOCK/3)
-
-// H counts from 128->511, HBLANK starts at 128+16=144 and ends at 128+64+32+16=240
-#define HTOTAL (384)
-#define HBEND (0) /*(96+16)*/
-#define HBSTART (288) /*(16)*/
-
-#define VTOTAL (264)
-#define VBEND (0) /*(16)*/
-#define VBSTART (224) /*(224+16)*/
-
-
-VIDEO_START_MEMBER(schick_state,schick)
-{
- save_item(NAME(m_charbank));
- save_item(NAME(m_spritebank));
- save_item(NAME(m_palettebank));
- save_item(NAME(m_colortablebank));
- save_item(NAME(m_flipscreen));
- save_item(NAME(m_bgpriority));
-
- m_charbank = 0;
- m_spritebank = 0;
- m_palettebank = 0;
- m_colortablebank = 0;
- m_flipscreen = 0;
- m_bgpriority = 0;
- m_inv_spr = 0;
-
- m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(schick_state::schick_get_tile_info)), tilemap_mapper_delegate(*this, FUNC(schick_state::schick_scan_rows)), 8, 8, 36, 28);
-}
-
-TILEMAP_MAPPER_MEMBER(schick_state::schick_scan_rows)
-{
- int offs;
-
- row += 2;
- col -= 2;
- if (col & 0x20)
- offs = row + ((col & 0x1f) << 5);
- else
- offs = col + (row << 5);
-
- return offs;
-}
-
-TILE_GET_INFO_MEMBER(schick_state::schick_get_tile_info)
-{
- int code = m_videoram[tile_index] | (m_charbank << 8);
- int attr = (m_colorram[tile_index] & 0x1f) | (m_colortablebank << 5) | (m_palettebank << 6 );
-
- attr &= 0xf;
-
- tileinfo.set(0,code,attr,0);
-}
-
-void schick_state::schick_videoram_w(offs_t offset, uint8_t data)
-{
- m_videoram[offset] = data;
- m_bg_tilemap->mark_tile_dirty(offset );
-}
-
-void schick_state::schick_colorram_w(offs_t offset, uint8_t data)
-{
- m_colorram[offset] = data;
- m_bg_tilemap->mark_tile_dirty(offset );
-}
-
-WRITE_LINE_MEMBER(schick_state::schick_palettebank_w)
-{
- m_palettebank = state;
- m_bg_tilemap->mark_all_dirty();
-}
-
-WRITE_LINE_MEMBER(schick_state::schick_colortablebank_w)
-{
- m_colortablebank = state;
- m_bg_tilemap->mark_all_dirty();
-}
-
-WRITE_LINE_MEMBER(schick_state::schick_gfxbank_w)
-{
- m_spritebank = state;
- m_charbank = state;
- m_bg_tilemap->mark_all_dirty();
-}
-
-WRITE_LINE_MEMBER(schick_state::coin_counter_1_w)
-{
- machine().bookkeeping().coin_counter_w(0, state);
-}
-
-WRITE_LINE_MEMBER(schick_state::coin_counter_2_w)
-{
- machine().bookkeeping().coin_counter_w(1, state);
-}
-
-WRITE_LINE_MEMBER(schick_state::irq_mask_w)
-{
- m_irq_mask = state;
-}
-
-uint32_t schick_state::screen_update_schick(screen_device& screen, bitmap_ind16& bitmap, const rectangle& cliprect)
-{
- if (m_bgpriority != 0)
- bitmap.fill(0, cliprect);
- else
- m_bg_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_OPAQUE, 0);
-
- if (m_spriteram != nullptr)
- {
- uint8_t* spriteram = m_spriteram;
- uint8_t* spriteram_2 = m_spriteram2;
- int offs;
-
- rectangle spriteclip(2 * 8, 34 * 8 - 1, 0 * 8, 28 * 8 - 1);
- spriteclip &= cliprect;
-
- // Draw the sprites. Note that it is important to draw them exactly in this order, to have the correct priorities.
- for (offs = m_spriteram.bytes() - 2; offs >= 0; offs -= 2)
- {
- int color;
- int sx, sy;
- uint8_t fx, fy;
-
- if (m_inv_spr)
- {
- sx = spriteram_2[offs + 1];
- sy = 240 - (spriteram_2[offs]);
- }
- else
- {
- sx = 272 - spriteram_2[offs + 1];
- sy = spriteram_2[offs] - 31;
- }
-
- fx = (spriteram[offs] & 1) ^ m_inv_spr;
- fy = (spriteram[offs] & 2) ^ ((m_inv_spr) << 1);
-
- color = (spriteram[offs + 1] & 0x1f) | (m_colortablebank << 5) | (m_palettebank << 6);
-
- m_gfxdecode->gfx(1)->transpen(bitmap, spriteclip,
- (spriteram[offs] >> 2) | (m_spritebank << 6),
- color,
- fx, fy,
- sx, sy,
- 0);
-
- m_gfxdecode->gfx(1)->transpen(bitmap, spriteclip,
- (spriteram[offs] >> 2) | (m_spritebank << 6),
- color,
- fx, fy,
- sx - 256, sy,
- 0);
- }
- }
-
- if (m_bgpriority != 0)
- m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
-
- return 0;
-}
-
-void schick_state::schick_portmap(address_map &map)
-{
- map.global_mask(0xff);
-}
-
-void schick_state::schick_map(address_map &map) // where's the sound latch?
-{
- map(0x0000, 0x7fff).rom();
- map(0x8000, 0x83ff).ram().w(FUNC(schick_state::schick_videoram_w)).share("videoram");
- map(0x8400, 0x87ff).ram().w(FUNC(schick_state::schick_colorram_w)).share("colorram");
- map(0x8800, 0x8fef).ram().share("mainram");
- map(0x8ff0, 0x8fff).ram().share("spriteram");
-
- map(0x8923, 0x8924).r(FUNC(schick_state::schick_hack_r)); // protection? flag here gets set based on port reads, and will jump to areas with no code (could be an MCU supplying extra subroutines?)
-
- map(0x9000, 0x901f).nopw(); // leftover from pengo?
- map(0x9020, 0x902f).writeonly().share("spriteram2");
- map(0x9000, 0x903f).portr("SW2");
- map(0x9040, 0x907f).portr("SW1");
- map(0x9040, 0x9047).w(m_latch, FUNC(ls259_device::write_d0));
- map(0x9070, 0x9070).w(m_watchdog, FUNC(watchdog_timer_device::reset_w));
- map(0x9080, 0x90bf).portr("IN1");
- map(0x90c0, 0x90ff).portr("IN0");
- map(0xe000, 0xffff).rom();
-}
-
-void schick_state::schick_decrypted_opcodes_map(address_map &map)
-{
- map(0x0000, 0xffff).rom().share("decrypted_opcodes");
- map(0x8800, 0x8fef).ram().share("mainram");
- map(0x8ff0, 0x8fff).ram().share("spriteram");
-}
-
-void schick_state::schick_audio_map(address_map &map)
-{
- map(0x0000, 0x1fff).rom();
- map(0x4000, 0x43ff).ram();
- map(0x6000, 0x6000).r("soundlatch", FUNC(generic_latch_8_device::read));
-}
-
-void schick_state::schick_audio_io_map(address_map &map)
-{
- map.global_mask(0xff);
- map(0x00, 0x01).w("ay1", FUNC(ay8910_device::address_data_w));
- map(0x10, 0x11).w("ay2", FUNC(ay8910_device::address_data_w));
- map(0x80, 0x81).w("ay3", FUNC(ay8910_device::address_data_w));
-}
-
-static INPUT_PORTS_START( schick ) // TODO: check everything
- PORT_START("IN0")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN1 )
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN2 )
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_SERVICE )
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON1 )
-
- PORT_START("IN1")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY PORT_COCKTAIL
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_COCKTAIL
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_COCKTAIL
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_COCKTAIL
- PORT_SERVICE_NO_TOGGLE(0x10, IP_ACTIVE_LOW)
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
-
- PORT_START("SW1") // dips seem the same as Pengo
- PORT_DIPNAME( 0x01, 0x00, DEF_STR( Bonus_Life ) ) PORT_DIPLOCATION("SW1:1")
- PORT_DIPSETTING( 0x00, "30000" )
- PORT_DIPSETTING( 0x01, "50000" )
- PORT_DIPNAME( 0x02, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW1:2")
- PORT_DIPSETTING( 0x02, DEF_STR( Off ) )
- PORT_DIPSETTING( 0x00, DEF_STR( On ) )
- PORT_DIPNAME( 0x04, 0x00, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SW1:3")
- PORT_DIPSETTING( 0x00, DEF_STR( Upright ) )
- PORT_DIPSETTING( 0x04, DEF_STR( Cocktail ) )
- PORT_DIPNAME( 0x18, 0x10, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW1:4,5")
- PORT_DIPSETTING( 0x18, "2" )
- PORT_DIPSETTING( 0x10, "3" )
- PORT_DIPSETTING( 0x08, "4" )
- PORT_DIPSETTING( 0x00, "5" )
- PORT_DIPNAME( 0x20, 0x20, "Rack Test (Cheat)" ) PORT_CODE(KEYCODE_F1) PORT_DIPLOCATION("SW1:6")
- PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
- PORT_DIPSETTING( 0x00, DEF_STR( On ) )
- PORT_DIPNAME( 0xc0, 0x80, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW1:7,8")
- PORT_DIPSETTING( 0xc0, DEF_STR( Easy ) )
- PORT_DIPSETTING( 0x80, DEF_STR( Medium ) )
- PORT_DIPSETTING( 0x40, DEF_STR( Hard ) )
- PORT_DIPSETTING( 0x00, DEF_STR( Hardest ) )
-
- PORT_START("SW2")
- PORT_DIPNAME( 0x0f, 0x0c, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW2:1,2,3,4")
- PORT_DIPSETTING( 0x00, DEF_STR( 4C_1C ) )
- PORT_DIPSETTING( 0x08, DEF_STR( 3C_1C ) )
- PORT_DIPSETTING( 0x04, DEF_STR( 2C_1C ) )
- PORT_DIPSETTING( 0x09, "2 Coins/1 Credit 5/3" )
- PORT_DIPSETTING( 0x05, "2 Coins/1 Credit 4/3" )
- PORT_DIPSETTING( 0x0c, DEF_STR( 1C_1C ) )
- PORT_DIPSETTING( 0x0d, "1 Coin/1 Credit 5/6" )
- PORT_DIPSETTING( 0x03, "1 Coin/1 Credit 4/5" )
- PORT_DIPSETTING( 0x0b, "1 Coin/1 Credit 2/3" )
- PORT_DIPSETTING( 0x02, DEF_STR( 1C_2C ) )
- PORT_DIPSETTING( 0x07, "1 Coin/2 Credits 5/11" )
- PORT_DIPSETTING( 0x0f, "1 Coin/2 Credits 4/9" )
- PORT_DIPSETTING( 0x0a, DEF_STR( 1C_3C ) )
- PORT_DIPSETTING( 0x06, DEF_STR( 1C_4C ) )
- PORT_DIPSETTING( 0x0e, DEF_STR( 1C_5C ) )
- PORT_DIPSETTING( 0x01, DEF_STR( 1C_6C ) )
- PORT_DIPNAME( 0xf0, 0xc0, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW2:5,6,7,8")
- PORT_DIPSETTING( 0x00, DEF_STR( 4C_1C ) )
- PORT_DIPSETTING( 0x80, DEF_STR( 3C_1C ) )
- PORT_DIPSETTING( 0x40, DEF_STR( 2C_1C ) )
- PORT_DIPSETTING( 0x90, "2 Coins/1 Credit 5/3" )
- PORT_DIPSETTING( 0x50, "2 Coins/1 Credit 4/3" )
- PORT_DIPSETTING( 0xc0, DEF_STR( 1C_1C ) )
- PORT_DIPSETTING( 0xd0, "1 Coin/1 Credit 5/6" )
- PORT_DIPSETTING( 0x30, "1 Coin/1 Credit 4/5" )
- PORT_DIPSETTING( 0xb0, "1 Coin/1 Credit 2/3" )
- PORT_DIPSETTING( 0x20, DEF_STR( 1C_2C ) )
- PORT_DIPSETTING( 0x70, "1 Coin/2 Credits 5/11" )
- PORT_DIPSETTING( 0xf0, "1 Coin/2 Credits 4/9" )
- PORT_DIPSETTING( 0xa0, DEF_STR( 1C_3C ) )
- PORT_DIPSETTING( 0x60, DEF_STR( 1C_4C ) )
- PORT_DIPSETTING( 0xe0, DEF_STR( 1C_5C ) )
- PORT_DIPSETTING( 0x10, DEF_STR( 1C_6C ) )
-INPUT_PORTS_END
-
-
-static const gfx_layout tilelayout =
-{
- 8,8,
- RGN_FRAC(1,2),
- 4,
- { 0, 4, RGN_FRAC(1,2)+0, RGN_FRAC(1,2)+4 },
- { 8*8+0, 8*8+1, 8*8+2, 8*8+3, 0, 1, 2, 3 },
- { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
- 16*8
-};
-
-static const gfx_layout spritelayout =
-{
- 16,16,
- RGN_FRAC(1,2),
- 4,
- { 0, 4, RGN_FRAC(1,2)+0, RGN_FRAC(1,2)+4 },
- { 8*8, 8*8+1, 8*8+2, 8*8+3, 16*8+0, 16*8+1, 16*8+2, 16*8+3,
- 24*8+0, 24*8+1, 24*8+2, 24*8+3, 0, 1, 2, 3 },
- { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
- 32*8, 33*8, 34*8, 35*8, 36*8, 37*8, 38*8, 39*8 },
- 64*8
-};
-
-
-static GFXDECODE_START( gfx_schick )
- GFXDECODE_ENTRY( "gfx1", 0x0000, tilelayout, 0, 128/4 )
- GFXDECODE_ENTRY( "gfx1", 0x0000, spritelayout, 0, 128/4 )
-GFXDECODE_END
-
-WRITE_LINE_MEMBER(schick_state::vblank_irq)
-{
- if (state && m_irq_mask)
- m_maincpu->set_input_line(0, HOLD_LINE);
-}
-
-void schick_state::schick(machine_config &config) // all dividers unknown
-{
- /* basic machine hardware */
- Z80(config, m_maincpu, MASTER_CLOCK/6);
- m_maincpu->set_addrmap(AS_PROGRAM, &schick_state::schick_map);
- m_maincpu->set_addrmap(AS_OPCODES, &schick_state::schick_decrypted_opcodes_map);
- m_maincpu->set_addrmap(AS_IO, &schick_state::schick_portmap);
-
- z80_device &audiocpu(Z80(config, "audiocpu", MASTER_CLOCK/6));
- audiocpu.set_addrmap(AS_PROGRAM, &schick_state::schick_audio_map);
- audiocpu.set_addrmap(AS_IO, &schick_state::schick_audio_io_map);
-
- GENERIC_LATCH_8(config, "soundlatch");
-
- WATCHDOG_TIMER(config, m_watchdog);
-
- LS259(config, m_latch); // 3I, TODO: identify bits' function. 0 is correct, 2, 6 and 7 seem to be set when switching from title screen to game screen, 1, 3, 4 and 5 seem to never be set during gameplay
- m_latch->q_out_cb<0>().set(FUNC(schick_state::irq_mask_w));
- m_latch->q_out_cb<1>().set_log("m_latch bit 1 set");
- m_latch->q_out_cb<2>().set(FUNC(schick_state::schick_palettebank_w));
- m_latch->q_out_cb<3>().set_log("m_latch bit 3 set");
- m_latch->q_out_cb<4>().set(FUNC(schick_state::coin_counter_1_w));
- m_latch->q_out_cb<5>().set(FUNC(schick_state::coin_counter_2_w));
- m_latch->q_out_cb<6>().set(FUNC(schick_state::schick_colortablebank_w));
- m_latch->q_out_cb<7>().set(FUNC(schick_state::schick_gfxbank_w));
-
- /* video hardware */
- GFXDECODE(config, m_gfxdecode, m_palette, gfx_schick);
- PALETTE(config, "palette").set_format(palette_device::xRGB_555, 0x8000); // unknown format, from missing PROMs?
-
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); // to be verified
- screen.set_raw(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL, VBEND, VBSTART);
- screen.set_screen_update(FUNC(schick_state::screen_update_schick));
- screen.set_palette(m_palette);
- screen.screen_vblank().set(FUNC(schick_state::vblank_irq));
-
- MCFG_VIDEO_START_OVERRIDE(schick_state, schick)
-
- // sound hardware
- SPEAKER(config, "mono").front_center();
-
- AY8910(config, "ay1", MASTER_CLOCK/12).add_route(ALL_OUTPUTS, "mono", 0.13);
-
- AY8910(config, "ay2", MASTER_CLOCK/12).add_route(ALL_OUTPUTS, "mono", 0.13);
-
- AY8910(config, "ay3", MASTER_CLOCK/12).add_route(ALL_OUTPUTS, "mono", 0.13);
-}
-
-
-
-// copied from schick.cpp, as also used here
-void schick_state::decode_penta(int end, int nodecend)
-{
-/*
- the values vary, but the translation mask is always laid out like this:
-
- 0 1 2 3 4 5 6 7 8 9 a b c d e f
- 0 A A B B A A B B C C D D C C D D
- 1 A A B B A A B B C C D D C C D D
- 2 E E F F E E F F G G H H G G H H
- 3 E E F F E E F F G G H H G G H H
- 4 A A B B A A B B C C D D C C D D
- 5 A A B B A A B B C C D D C C D D
- 6 E E F F E E F F G G H H G G H H
- 7 E E F F E E F F G G H H G G H H
- 8 H H G G H H G G F F E E F F E E
- 9 H H G G H H G G F F E E F F E E
- a D D C C D D C C B B A A B B A A
- b D D C C D D C C B B A A B B A A
- c H H G G H H G G F F E E F F E E
- d H H G G H H G G F F E E F F E E
- e D D C C D D C C B B A A B B A A
- f D D C C D D C C B B A A B B A A
-
- (e.g. 0xc0 is XORed with H)
- therefore in the following tables we only keep track of A, B, C, D, E, F, G and H.
-*/
- static const uint8_t data_xortable[2][8] =
- {
- { 0xa0,0x82,0x28,0x0a,0x82,0xa0,0x0a,0x28 }, // ...............0
- { 0x88,0x0a,0x82,0x00,0x88,0x0a,0x82,0x00 } // ...............1
- };
- static const uint8_t opcode_xortable[8][8] =
- {
- { 0x02,0x08,0x2a,0x20,0x20,0x2a,0x08,0x02 }, // ...0...0...0....
- { 0x88,0x88,0x00,0x00,0x88,0x88,0x00,0x00 }, // ...0...0...1....
- { 0x88,0x0a,0x82,0x00,0xa0,0x22,0xaa,0x28 }, // ...0...1...0....
- { 0x88,0x0a,0x82,0x00,0xa0,0x22,0xaa,0x28 }, // ...0...1...1....
- { 0x2a,0x08,0x2a,0x08,0x8a,0xa8,0x8a,0xa8 }, // ...1...0...0....
- { 0x2a,0x08,0x2a,0x08,0x8a,0xa8,0x8a,0xa8 }, // ...1...0...1....
- { 0x88,0x0a,0x82,0x00,0xa0,0x22,0xaa,0x28 }, // ...1...1...0....
- { 0x88,0x0a,0x82,0x00,0xa0,0x22,0xaa,0x28 } // ...1...1...1....
- };
-
- uint8_t *rom = memregion("maincpu")->base();
-
- for (int A = 0x0000;A < end;A++)
- {
- uint8_t src = rom[A];
-
- // pick the translation table from bit 0 of the address
- int i = A & 1;
-
- // pick the offset in the table from bits 1, 3 and 5 of the source data
- int j = ((src >> 1) & 1) + (((src >> 3) & 1) << 1) + (((src >> 5) & 1) << 2);
- // the bottom half of the translation table is the mirror image of the top
- if (src & 0x80) j = 7 - j;
-
- // decode the ROM data
- rom[A] = src ^ data_xortable[i][j];
-
- // now decode the opcodes
- // pick the translation table from bits 4, 8 and 12 of the address
- i = ((A >> 4) & 1) + (((A >> 8) & 1) << 1) + (((A >> 12) & 1) << 2);
- m_decrypted_opcodes[A] = src ^ opcode_xortable[i][j];
- }
-
- for (int A = end; A < nodecend; A++)
- {
- m_decrypted_opcodes[A] = rom[A];
- }
-}
-
-void schick_state::decode_schick_extra(int size, uint8_t* rom)
-{
- // schick has an extra layer of encryption in addition to the penta encryption
- for (int A = 0x0000; A < 0x8000; A++)
- {
- uint8_t srcdec = rom[A];
-
- if (A & 0x100)
- {
- srcdec = bitswap<8>(srcdec^0x41, 7, 4, 5, 6, 3, 2, 1, 0);
- }
- else
- {
- srcdec = bitswap<8>(srcdec^0x51, 7, 6, 5, 0, 3, 2, 1, 4);
- }
-
-
- rom[A] = srcdec;
- }
-
- for (int A = 0x8000; A < 0x10000; A++) // TODO: decryption is presumed correct, but ROM test fails (because it's a hack or because of some decryption errors lingering?)
- {
- uint8_t srcdec = rom[A];
-
- // this layer of encryption only affects bits 0,4,6
-
- if (rom == m_decrypted_opcodes)
- {
- if (A & 0x1000)
- {
- srcdec = bitswap<8>(srcdec ^ 0x40, 7, 0, 5, 6, 3, 2, 1, 4);
- rom[A] = srcdec;
- }
- else
- {
- if (A & 0x100)
- {
- srcdec = bitswap<8>(srcdec ^ 0x40, 7, 4, 5, 0, 3, 2, 1, 6);
- rom[A] = srcdec;
- }
- else
- {
- srcdec = bitswap<8>(srcdec ^ 0x41, 7, 0, 5, 6, 3, 2, 1, 4);
- rom[A] = srcdec;
- }
- }
- }
- else
- {
- if (A & 0x10)
- srcdec = bitswap<8>(srcdec ^ 0x11, 7, 0, 5, 6, 3, 2, 1, 4);
- else
- srcdec = bitswap<8>(srcdec ^ 0x51, 7, 4, 5, 0, 3, 2, 1, 6);
-
- rom[A] = srcdec;
- }
- }
-}
-
-void schick_state::init_schick()
-{
- uint8_t *rom = memregion("maincpu")->base();
-
- decode_penta(0x8000, 0x10000);
-
- decode_schick_extra(0x10000, rom);
- decode_schick_extra(0x10000, m_decrypted_opcodes);
-}
-
-
-// MH032288 PCB. LC ('lato componenti', components side in Italian) so maybe produced in Italy?
-// A plastic block in a corner covers probably the main CPU and the decryption logic.
-ROM_START( schick )
- ROM_REGION( 0x10000, "maincpu", 0 )
- ROM_LOAD( "27c512.8d", 0x0000, 0x10000, CRC(38986329) SHA1(bfd62d6a49d25acc582e5f076833c3b22c1a7fd7) )
-
- ROM_REGION( 0x8000, "audiocpu", 0 )
- ROM_LOAD( "27c256.7m", 0x0000, 0x8000, CRC(694dadca) SHA1(65d436d6c8ebf6a9b5af286122e7391973d463e0) ) // identical to bombjack, but 4x
-
- ROM_REGION( 0x10000, "gfx1", 0 )
- ROM_LOAD( "4.27c256.4f", 0x0000, 0x8000, CRC(f666a52a) SHA1(877e1112c9c9a39b55934f6a382ad35fc9bf6859) ) // only labeled ROM
- ROM_LOAD( "27c256.4e", 0x8000, 0x8000, CRC(edb4a243) SHA1(64f35b5142ffb3bfbd6a2899af9d1d719b83e2a1) )
-
- ROM_REGION( 0x420, "proms", ROMREGION_ERASEFF ) // color palette
- ROM_LOAD( "63s081n", 0x000, 0x020, NO_DUMP)
- ROM_LOAD( "am27s33pc", 0x020, 0x400, NO_DUMP)
-ROM_END
-
-
-GAME( 1988, schick, 0, schick, schick, schick_state, init_schick, ROT90, "Microhard", "Super Chick", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_UNEMULATED_PROTECTION | MACHINE_SUPPORTS_SAVE )