diff options
Diffstat (limited to 'src/mess/drivers/astrocde.c')
-rw-r--r-- | src/mess/drivers/astrocde.c | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/src/mess/drivers/astrocde.c b/src/mess/drivers/astrocde.c new file mode 100644 index 00000000000..84876c5e470 --- /dev/null +++ b/src/mess/drivers/astrocde.c @@ -0,0 +1,395 @@ +/**************************************************************************** + + Bally Astrocade consumer hardware + driver by Nicola Salmoria, Mike Coates, Frank Palazzolo, Aaron Giles, + Dirk Best + +****************************************************************************/ + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "includes/astrocde.h" +#include "sound/astrocde.h" +#include "imagedev/cartslot.h" +#include "machine/ram.h" + +MACHINE_RESET( astrocde ); +void get_ram_expansion_settings(address_space *space, int &ram_expansion_installed, int &write_protect_on, int &expansion_ram_start, int &expansion_ram_end, int &shadow_ram_end); + +/************************************* + * + * Memory maps + * + * $0000 to $1FFF: 8K on-board ROM (could be one of three available BIOS dumps) + * $2000 to $3FFF: 8K cartridge ROM + * $4000 to $4FFF: 4K screen RAM + * $5000 to $FFFF: 44K address space not available in standard machine. With a + * sufficiently large RAM expansion, all of this RAM can be added, and accessed + * by an extended BASIC program. Bally and Astrocade BASIC can access from + * $5000 to $7FFF if available. + * + * RAM Expansions + * + * Several third party RAM expansions have been made for the Astrocade. These + * allow access to various ranges of the expansion memory ($5000 to $FFFF). + * A RAM expansion is required to use extended BASIC programs like Blue RAM BASIC + * and VIPERSoft BASIC. All of the expansions also have a RAM protect switch, which + * can be flipped at any time to make the RAM act like ROM. Extended BASIC + * programs need access to the RAM and won't work with RAM protect enabled, but + * this can be useful with Bally and Astrocade BASIC. They also have a range switch + * (not implemented). The default position is 6K, but it can be switched to + * 2K. This means that the expanded memory starting at $6000 will instead be + * mapped to the cartridge memory starting at $2000. So it would be possible to + * load a cartridge program from tape into the expansion memory, then flip the range + * switch and run it as a cartridge. This is useful for cartridge development. + * + * NOTE: If you have any trouble running cartridges with a RAM expansion installed, hit reset. + * + * Blue RAM -- available in 4K, 16K, and 32K. These also use an INS8154 chip, + * (not yet implemented) which has an additional $80 bytes of RAM mapped + * immediately after the end of the expansion address space. This memory + * can't be write protected. The INS8154 has I/O features needed for loading + * tape programs into Blue RAM BASIC, as well as running the Blue RAM Utility cart. + * 4K: $6000 to $6FFF (can't run VIPERSoft BASIC, because this program needs memory + * past this range) + * 16K: $6000 to $9FFF + * 32K: $6000 to $DFFF + * + * VIPER System 1 -- This is available in 16K only. It also includes a keyboard (not implemented). + * 16K: $6000 to $9FFF + * + * Lil' WHITE RAM -- This is available in 32K only. Attempts to read and write + * to memory outside of its address range ($D000 to $FFFF) are mapped to the expansion + * memory $5000 to $7FFF. The current implementation won't allow the shadow RAM area + * to be accessed when RAM protect is on, but there is no known software that will + * access the upper range of the expansion RAM when RAM protect is enabled. + * 32K: $5000 to $CFFF + * + * R&L 64K RAM Board -- This is a highly configurable kit. RAM can be installed in + * 2K increments. So, the entire 44K expansion memory can be filled. It is also + * possible to override the rest of the memory map with RAM (not implemented). + * There are 32 switches allowing users to activate and deactivate each 2K block (not implemented). + * RAM write protection can be implemented in three ranges through jumpers or by + * installing switches. The ranges are $0000 to $0FFF (first 4K), $0000 to $3FFF (first 16K), + * and $0000 to $FFFF (all 64K). The current implementation is for 44K expansion memory mapped from + * $5000 to $FFFF, with only a single write protect covering this entire range. + * + *************************************/ + +static ADDRESS_MAP_START( astrocade_mem, AS_PROGRAM, 8, astrocde_state ) + AM_RANGE(0x0000, 0x0fff) AM_ROM AM_WRITE(astrocade_funcgen_w) + AM_RANGE(0x1000, 0x3fff) AM_ROM /* Star Fortress writes in here?? */ + AM_RANGE(0x4000, 0x4fff) AM_RAM AM_SHARE("videoram") /* ASG */ +ADDRESS_MAP_END + + +static ADDRESS_MAP_START( astrocade_io, AS_IO, 8, astrocde_state ) + AM_RANGE(0x00, 0x1f) AM_MIRROR(0xff00) AM_MASK(0xffff) AM_READWRITE(astrocade_data_chip_register_r, astrocade_data_chip_register_w) +ADDRESS_MAP_END + +static INPUT_CHANGED( set_write_protect ) // run when RAM expansion write protect switch is changed +{ + int ram_expansion_installed = 0, write_protect_on = 0, expansion_ram_start = 0, expansion_ram_end = 0, shadow_ram_end = 0; + address_space *space = field.machine().device("maincpu")->memory().space(AS_PROGRAM); + UINT8 *expram = field.machine().device<ram_device>("ram_tag")->pointer(); + + get_ram_expansion_settings(space, ram_expansion_installed, write_protect_on, expansion_ram_start, expansion_ram_end, shadow_ram_end); // passing by reference + + if (ram_expansion_installed == 1) + { + if (write_protect_on == 0) // write protect off, so install memory normally + { + space->install_ram(expansion_ram_start, expansion_ram_end, expram); + if (shadow_ram_end > expansion_ram_end) + space->install_ram(expansion_ram_end + 1, shadow_ram_end, expram); + } + else // write protect on, so make memory read only + { + space->nop_write(expansion_ram_start, expansion_ram_end); + } + } +} + +/************************************* + * + * Input ports + * + * + * The Astrocade has ports for four hand controllers. Each controller has a + * knob on top that can be simultaneously pushed as an eight-way joystick and + * twisted as a paddle, in addition to a trigger button. The knob can twist + * through about 270 degrees, registering 256 unique positions. It does not + * autocenter. When selecting options on the menu, twisting the knob to the + * right gives lower numbers, and twisting to the left gives larger numbers. + * Paddle games like Clowns have more intuitive behavior -- twisting to the + * right moves the character right. + * + * There is a 24-key keypad on the system itself (6 rows, 4 columns). It is + * labeled for the built-in calculator, but overlays were released for other + * programs, the most popular being the BASIC cartridges, which allowed a + * large number of inputs by making the bottom row shift buttons. The labels + * below first list the calculator key, then the BASIC keys in the order of no + * shift, GREEN shift, RED shift, BLUE shift, WORDS shift. + * + *************************************/ + +static INPUT_PORTS_START( astrocde ) + PORT_START("P1HANDLE") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP) PORT_PLAYER(1) PORT_8WAY + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN) PORT_PLAYER(1) PORT_8WAY + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT) PORT_PLAYER(1) PORT_8WAY + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT) PORT_PLAYER(1) PORT_8WAY + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_PLAYER(1) + PORT_BIT(0xe0, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("P2HANDLE") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP) PORT_PLAYER(2) PORT_8WAY + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN) PORT_PLAYER(2) PORT_8WAY + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT) PORT_PLAYER(2) PORT_8WAY + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT) PORT_PLAYER(2) PORT_8WAY + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_PLAYER(2) + PORT_BIT(0xe0, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("P3HANDLE") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP) PORT_PLAYER(3) PORT_8WAY + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN) PORT_PLAYER(3) PORT_8WAY + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT) PORT_PLAYER(3) PORT_8WAY + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT) PORT_PLAYER(3) PORT_8WAY + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_PLAYER(3) + PORT_BIT(0xe0, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("P4HANDLE") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP) PORT_PLAYER(4) PORT_8WAY + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN) PORT_PLAYER(4) PORT_8WAY + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT) PORT_PLAYER(4) PORT_8WAY + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT) PORT_PLAYER(4) PORT_8WAY + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_PLAYER(4) + PORT_BIT(0xe0, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("KEYPAD0") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("% \xC3\xB7 [ ] LIST") PORT_CODE(KEYCODE_O) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("/ x J K L NEXT") PORT_CODE(KEYCODE_SLASH_PAD) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("x - V W X IF") PORT_CODE(KEYCODE_ASTERISK) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("- + & @ * GOTO") PORT_CODE(KEYCODE_MINUS_PAD) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("+ = # % : PRINT") PORT_CODE(KEYCODE_PLUS_PAD) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("= WORDS Shift") PORT_CODE(KEYCODE_ENTER_PAD) + PORT_BIT(0xc0, IP_ACTIVE_HIGH, IPT_UNUSED ) + + PORT_START("KEYPAD1") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("\xE2\x86\x93 HALT RUN") PORT_CODE(KEYCODE_PGDN) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("CH 9 G H I STEP") PORT_CODE(KEYCODE_H) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("9 6 S T U RND") PORT_CODE(KEYCODE_9) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("6 3 \xE2\x86\x91 . \xE2\x86\x93 BOX") PORT_CODE(KEYCODE_6) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("3 ERASE ( ; )") PORT_CODE(KEYCODE_3) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME(". BLUE Shift") PORT_CODE(KEYCODE_STOP) + PORT_BIT(0xc0, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("KEYPAD2") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("\xE2\x86\x91 PAUSE / \\") PORT_CODE(KEYCODE_PGUP) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("MS 8 D E F TO") PORT_CODE(KEYCODE_S) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("8 5 P Q R RETN") PORT_CODE(KEYCODE_8) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("5 2 \xE2\x86\x90 ' \xE2\x86\x92 LINE") PORT_CODE(KEYCODE_5) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("2 0 < \" > INPUT") PORT_CODE(KEYCODE_2) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("0 RED Shift") PORT_CODE(KEYCODE_0) + PORT_BIT(0xc0, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("KEYPAD3") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("C GO +10") PORT_CODE(KEYCODE_C) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("MR 7 A B C FOR") PORT_CODE(KEYCODE_R) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("7 4 M N O GOSB") PORT_CODE(KEYCODE_7) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("4 1 Y Z ! CLEAR") PORT_CODE(KEYCODE_4) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("1 SPACE $ , ?") PORT_CODE(KEYCODE_1) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("CE GREEN Shift") PORT_CODE(KEYCODE_E) + PORT_BIT(0xc0, IP_ACTIVE_HIGH, IPT_UNUSED) + + PORT_START("P1_KNOB") + PORT_BIT(0xff, 0x00, IPT_PADDLE) PORT_INVERT PORT_SENSITIVITY(85) PORT_KEYDELTA(10) PORT_CENTERDELTA(0) PORT_MINMAX(0,255) PORT_CODE_DEC(KEYCODE_Z) PORT_CODE_INC(KEYCODE_X) PORT_PLAYER(1) + + PORT_START("P2_KNOB") + PORT_BIT(0xff, 0x00, IPT_PADDLE) PORT_INVERT PORT_SENSITIVITY(85) PORT_KEYDELTA(10) PORT_CENTERDELTA(0) PORT_MINMAX(0,255) PORT_CODE_DEC(KEYCODE_N) PORT_CODE_INC(KEYCODE_M) PORT_PLAYER(2) + + PORT_START("P3_KNOB") + PORT_BIT(0xff, 0x00, IPT_PADDLE) PORT_INVERT PORT_SENSITIVITY(85) PORT_KEYDELTA(10) PORT_CENTERDELTA(0) PORT_MINMAX(0,255) PORT_CODE_DEC(KEYCODE_Q) PORT_CODE_INC(KEYCODE_W) PORT_PLAYER(3) + + PORT_START("P4_KNOB") + PORT_BIT(0xff, 0x00, IPT_PADDLE) PORT_INVERT PORT_SENSITIVITY(85) PORT_KEYDELTA(10) PORT_CENTERDELTA(0) PORT_MINMAX(0,255) PORT_CODE_DEC(KEYCODE_Y) PORT_CODE_INC(KEYCODE_U) PORT_PLAYER(4) + + PORT_START("CFG") /* machine config */ + PORT_DIPNAME( 0x3f, 0x00, "RAM Expansion") + PORT_DIPSETTING( 0x00, "No RAM Expansion") + PORT_DIPSETTING( 0x01, "16KB Viper System 1 RAM Expansion") + PORT_DIPSETTING( 0x02, "32KB Lil' WHITE RAM Expansion") + PORT_DIPSETTING( 0x04, "R&L 64K RAM Board (44K installed)") + PORT_DIPSETTING( 0x08, "4KB Blue RAM Expansion") + PORT_DIPSETTING( 0x10, "16KB Blue RAM Expansion") + PORT_DIPSETTING( 0x20, "32KB Blue RAM Expansion") + + PORT_START("PROTECT") /* Write protect RAM */ + PORT_DIPNAME( 0x01, 0x00, "Write Protect RAM") PORT_CHANGED(set_write_protect, 0) + PORT_DIPSETTING( 0x00, "Write Protect Off") + PORT_DIPSETTING( 0x01, "Write Protect On") +INPUT_PORTS_END + + +/************************************* + * + * Machine drivers + * + *************************************/ + +static MACHINE_CONFIG_START( astrocde, astrocde_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu", Z80, ASTROCADE_CLOCK/4) /* 1.789 MHz */ + MCFG_CPU_PROGRAM_MAP(astrocade_mem) + MCFG_CPU_IO_MAP(astrocade_io) + + MCFG_MACHINE_RESET( astrocde ) + + /* video hardware */ + MCFG_SCREEN_ADD("screen", RASTER) + MCFG_SCREEN_RAW_PARAMS(ASTROCADE_CLOCK, 455, 0, 352, 262, 0, 240) + MCFG_SCREEN_UPDATE_STATIC(astrocde) + + MCFG_PALETTE_LENGTH(512) + MCFG_PALETTE_INIT(astrocde) + + MCFG_VIDEO_START(astrocde) + + /* sound hardware */ + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_ADD("astrocade1", ASTROCADE, ASTROCADE_CLOCK/4) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00) + + /* optional expansion ram (installed in MACHINE_RESET)*/ + MCFG_RAM_ADD("ram_tag") + MCFG_RAM_DEFAULT_SIZE("32k") + + /* cartridge */ + MCFG_CARTSLOT_ADD("cart") + MCFG_CARTSLOT_EXTENSION_LIST("bin") + MCFG_CARTSLOT_INTERFACE("astrocde_cart") + + /* Software lists */ + MCFG_SOFTWARE_LIST_ADD("cart_list","astrocde") +MACHINE_CONFIG_END + + +/************************************* + * + * ROM definitions + * + *************************************/ + +ROM_START( astrocde ) + ROM_REGION( 0x10000, "maincpu", 0 ) + ROM_LOAD( "astro.bin", 0x0000, 0x2000, CRC(ebc77f3a) SHA1(b902c941997c9d150a560435bf517c6a28137ecc) ) + ROM_CART_LOAD( "cart", 0x2000, 0x8000, 0 ) +ROM_END + +ROM_START( astrocdl ) + ROM_REGION( 0x10000, "maincpu", 0 ) + ROM_LOAD( "ballyhlc.bin", 0x0000, 0x2000, CRC(d7c517ba) SHA1(6b2bef5d970e54ed204549f58ba6d197a8bfd3cc) ) + ROM_CART_LOAD( "cart", 0x2000, 0x8000, 0 ) +ROM_END + +ROM_START( astrocdw ) + ROM_REGION( 0x10000, "maincpu", 0 ) + ROM_LOAD( "bioswhit.bin", 0x0000, 0x2000, CRC(6eb53e79) SHA1(d84341feec1a0a0e8aa6151b649bc3cf6ef69fbf) ) + ROM_CART_LOAD( "cart", 0x2000, 0x8000, 0 ) +ROM_END + +/************************************* + * + * Driver initialization + * + *************************************/ + +DRIVER_INIT_MEMBER(astrocde_state,astrocde) +{ + m_video_config = AC_SOUND_PRESENT | AC_LIGHTPEN_INTS; +} + +MACHINE_RESET( astrocde ) +{ + int ram_expansion_installed = 0, write_protect_on = 0, expansion_ram_start = 0, expansion_ram_end = 0, shadow_ram_end = 0; + address_space *space = machine.device("maincpu")->memory().space(AS_PROGRAM); + UINT8 *expram = machine.device<ram_device>("ram_tag")->pointer(); + space->unmap_readwrite(0x5000, 0xffff); // unmap any previously installed expansion RAM + + get_ram_expansion_settings(space, ram_expansion_installed, write_protect_on, expansion_ram_start, expansion_ram_end, shadow_ram_end); // passing by reference + + if (ram_expansion_installed == 1) + { + if (write_protect_on == 0) // write protect off, so install memory normally + { + space->install_ram(expansion_ram_start, expansion_ram_end, expram); + if (shadow_ram_end > expansion_ram_end) + space->install_ram(expansion_ram_end + 1, shadow_ram_end, expram); + } + else // write protect on, so make memory read only + { + space->nop_write(expansion_ram_start, expansion_ram_end); + } + } +} + +void get_ram_expansion_settings(address_space *space, int &ram_expansion_installed, int &write_protect_on, int &expansion_ram_start, int &expansion_ram_end, int &shadow_ram_end) +{ + if (space->machine().root_device().ioport("PROTECT")->read() == 0x01) + write_protect_on = 1; + else + write_protect_on = 0; + + ram_expansion_installed = 1; + + switch(space->machine().root_device().ioport("CFG")->read()) // check RAM expansion configuration and set address ranges + { + case 0x00: // No RAM Expansion + ram_expansion_installed = 0; + break; + case 0x01: // 16KB Viper System 1 RAM Expansion + expansion_ram_start = 0x6000; + expansion_ram_end = 0x9fff; + shadow_ram_end = 0; + break; + case 0x02: // "32KB Lil' WHITE RAM Expansion + expansion_ram_start = 0x5000; + expansion_ram_end = 0xcfff; + shadow_ram_end = 0xffff; + break; + case 0x04: // R&L 64K RAM Board (44KB installed) + expansion_ram_start = 0x5000; + expansion_ram_end = 0xffff; + shadow_ram_end = 0; + break; + case 0x08: // 4KB Blue RAM Expansion + expansion_ram_start = 0x6000; + expansion_ram_end = 0x6fff; + shadow_ram_end = 0; + break; + case 0x10: // 16KB Blue RAM Expansion + expansion_ram_start = 0x6000; + expansion_ram_end = 0x9fff; + shadow_ram_end = 0; + break; + case 0x20: // 32KB Blue RAM Expansion + expansion_ram_start = 0x6000; + expansion_ram_end = 0xdfff; + shadow_ram_end = 0; + break; + default: + break; + } +} + + +/************************************* + * + * Driver definitions + * + *************************************/ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ +CONS( 1978, astrocde, 0, 0, astrocde, astrocde, astrocde_state, astrocde, "Bally Manufacturing", "Bally Professional Arcade", GAME_SUPPORTS_SAVE ) +CONS( 1977, astrocdl, astrocde, 0, astrocde, astrocde, astrocde_state, astrocde, "Bally Manufacturing", "Bally Home Library Computer", GAME_SUPPORTS_SAVE ) +CONS( 1977, astrocdw, astrocde, 0, astrocde, astrocde, astrocde_state, astrocde, "Bally Manufacturing", "Bally Computer System", GAME_SUPPORTS_SAVE ) |