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https://github.com/holub/mame
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bit90: Update to support BASIC 3.1 mask roms. Also added RAM options
This commit is contained in:
Frank Palazzolo
parent
5ffbb7f475
commit
af1c5e7bcb
@ -62,9 +62,9 @@
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- Dina SG-1000 mode
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- Bit90:
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Add support for memory expansion (documented)
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Add support for external memory handling (documented)
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Add support for printer interface (documented)
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Add tape Support
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Add tape support
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*/
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@ -97,6 +97,18 @@ void coleco_state::paddle_on_w(uint8_t data)
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m_joy_mode = 1;
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}
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void bit90_state::init()
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{
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auto pgm = &m_maincpu->space(AS_PROGRAM);
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if(m_ram->size() == 32768)
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return;
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else if(m_ram->size() == 16384)
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pgm->unmap_readwrite(0xc000, 0xffff);
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else if(m_ram->size() == 1024)
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pgm->unmap_readwrite(0x8000, 0xffff);
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}
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uint8_t bit90_state::bankswitch_u4_r(address_space &space)
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{
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if (!machine().side_effects_disabled()) {
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@ -141,7 +153,7 @@ void bit90_state::u32_w(uint8_t data)
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void coleco_state::coleco_map(address_map &map)
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{
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map(0x0000, 0x1fff).rom();
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map(0x6000, 0x63ff).ram().mirror(0x1c00).share("ram");
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map(0x6000, 0x63ff).ram().mirror(0x1c00);
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map(0x8000, 0xffff).rom();
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}
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@ -150,8 +162,8 @@ void bit90_state::bit90_map(address_map &map)
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map(0x0000, 0x1fff).bankr("bank");
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map(0x2000, 0x3fff).rom();
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map(0x4000, 0x5fff).rom(); // Decoded through pin 5 of the Bit90 expansion port
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map(0x6000, 0x67ff).ram().mirror(0x1800).share("ram");
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map(0x8000, 0xffff).rom(); // More RAM could also appear here (TBD)
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map(0x6000, 0x67ff).ram().mirror(0x1800);
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map(0x8000, 0xffff).ram();
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}
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void coleco_state::coleco_io_map(address_map &map)
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@ -189,13 +201,13 @@ void bit90_state::bit90_io_map(address_map &map)
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// External/(Internal?) RAM Interface
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//map(0x4e, 0x4f).w(FUNC(bit90_state::external_ram_control_w)); // 0x4e enable, 0x4f disable
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// RAM can appear, starting at 0x8000 up to 0xffff
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// RAM can appear here, starting at 0x8000 up to 0xffff
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}
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void coleco_state::czz50_map(address_map &map)
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{
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map(0x0000, 0x3fff).rom();
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map(0x6000, 0x63ff).ram().mirror(0x1c00).share("ram");
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map(0x6000, 0x63ff).ram().mirror(0x1c00);
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map(0x8000, 0xffff).rom();
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}
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@ -490,8 +502,6 @@ uint8_t coleco_state::coleco_paddle_read(int port, int joy_mode, uint8_t joy_sta
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void coleco_state::machine_start()
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{
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memset(m_ram, 0xff, m_ram.bytes()); // initialize RAM
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// init paddles
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for (int port = 0; port < 2; port++)
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{
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@ -617,6 +627,9 @@ void bit90_state::bit90(machine_config &config)
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/* software lists */
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SOFTWARE_LIST(config, "cart_list").set_original("coleco");
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/* internal ram */
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RAM(config, m_ram).set_default_size("32K").set_extra_options("1K,16K");
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TIMER(config, "paddle_timer").configure_periodic(FUNC(coleco_state::paddle_update_callback), attotime::from_msec(20));
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}
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@ -691,9 +704,14 @@ ROM_END
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#define rom_dina rom_czz50
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#define rom_prsarcde rom_czz50
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/* BIT90 BIOS
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/* Bit Corporation - BIT90
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Circuit board is labelled: BIT90C-PAL-90002
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Circuit board is labelled: BIT90C-PAL-90002 or BIT90C-PAL-90003
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BIT90C-PAL-90002 has 2K Internal RAM (<1K Usable from BASIC)
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Extra RAM can only be accessed via expansion port
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BIT90C-PAL-90003 has sockets for additional internal 16K or 32K internal RAM
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Units have 2764-compatible pinouts at U2,U3, and U4
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Some units have 2764 EPROMS, Mask ROMs, or a combination
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@ -715,19 +733,19 @@ MONITOR3
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*/
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ROM_START( bit90 )
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ROM_DEFAULT_BIOS( "3.0" )
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ROM_DEFAULT_BIOS( "3.1" )
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ROM_SYSTEM_BIOS( 0, "3.0", "BASIC 3.0" )
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ROM_SYSTEM_BIOS( 1, "3.1", "BASIC 3.1" )
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ROM_REGION( 0x10000, "maincpu", 0 )
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ROMX_LOAD("bit90b3.u2", 0x2000, 0x2000, CRC(b992b940) SHA1(c7dd96a1944fac40cbae20630f303a69de7e6313), ROM_BIOS(0))
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ROMX_LOAD("d32522e.u2", 0x2000, 0x2000, NO_DUMP, ROM_BIOS(1)) // MONITOR3
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ROMX_LOAD("d32522e.u2", 0x2000, 0x2000, CRC(66fc66b0) SHA1(6644c217860aa9940bef7c6aeb50768810d9035b), ROM_BIOS(1)) // MONITOR3
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ROM_REGION( 0x4000, "banked", 0 )
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ROMX_LOAD("bit90b3.u4", 0x0000, 0x2000, CRC(06d21fc2) SHA1(6d296b09b661babd4c2ef6993f8e768a67932388), ROM_BIOS(0))
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ROMX_LOAD("bit90b3.u3", 0x2000, 0x2000, CRC(61fdccbb) SHA1(25cac13627c0916d3ed2b92f0b2218b405de5be4), ROM_BIOS(0))
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ROMX_LOAD("d32351e.u4", 0x0000, 0x2000, NO_DUMP, ROM_BIOS(1)) // BIT-99C1
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ROMX_LOAD("d32521e.u3", 0x2000, 0x2000, NO_DUMP, ROM_BIOS(1)) // MONITOR2
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ROMX_LOAD("d32351e.u4", 0x0000, 0x2000, CRC(d00c7137) SHA1(43328257136aff5a4984cceafdb5601200ac24b4), ROM_BIOS(1)) // BIT-99C1
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ROMX_LOAD("d32521e.u3", 0x2000, 0x2000, CRC(f6401dd8) SHA1(78bc7f0fe4f5eb114773d654c92598512481abec), ROM_BIOS(1)) // MONITOR2
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ROM_END
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/* System Drivers */
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@ -739,4 +757,4 @@ CONS( 1983, colecop, coleco, 0, colecop, coleco, coleco_state, empty_init
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CONS( 1986, czz50, 0, coleco, czz50, czz50, coleco_state, empty_init, "Bit Corporation", "Chuang Zao Zhe 50", 0 )
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CONS( 1988, dina, czz50, 0, dina, czz50, coleco_state, empty_init, "Telegames", "Dina", 0 )
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CONS( 1988, prsarcde, czz50, 0, czz50, czz50, coleco_state, empty_init, "Telegames", "Personal Arcade", 0 )
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COMP( 1983, bit90, 0, coleco, bit90, bit90, bit90_state, empty_init, "Bit Corporation", "Bit90", 0 )
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COMP( 1983, bit90, 0, coleco, bit90, bit90, bit90_state, init, "Bit Corporation", "Bit90", 0 )
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@ -8,6 +8,7 @@
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#include "cpu/z80/z80.h"
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#include "machine/timer.h"
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#include "machine/ram.h"
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#include "sound/sn76496.h"
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#include "video/tms9928a.h"
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#include "machine/coleco.h"
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@ -20,7 +21,6 @@ public:
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: driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_cart(*this, COLECOVISION_CARTRIDGE_SLOT_TAG),
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m_ram(*this, "ram"),
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m_ctrlsel(*this, "CTRLSEL"),
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m_std_keypad1(*this, "STD_KEYPAD1"),
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m_std_joy1(*this, "STD_JOY1"),
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@ -69,7 +69,6 @@ public:
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protected:
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required_device<cpu_device> m_maincpu;
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required_device<colecovision_cartridge_slot_device> m_cart;
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required_shared_ptr<uint8_t> m_ram;
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int m_joy_mode;
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int m_last_nmi_state;
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@ -109,6 +108,7 @@ public:
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bit90_state(const machine_config &mconfig, device_type type, const char *tag)
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: coleco_state(mconfig, type, tag),
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m_bank(*this, "bank"),
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m_ram(*this, RAM_TAG),
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m_io_keyboard(*this, {"ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6", "ROW7"})
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{}
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@ -122,8 +122,11 @@ public:
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uint8_t keyboard_r(address_space &space);
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void u32_w(uint8_t data);
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void init();
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protected:
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required_memory_bank m_bank;
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required_device<ram_device> m_ram;
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required_ioport_array<8> m_io_keyboard;
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private:
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