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Bit90 - New driver for Bit90 computer by Bit Corporation (#5934)
* [bit90] New driver for bit90b3 (older version, later version is not dumped) * [bit90] New driver for Bit90 - based on older rom revision bit90b3
This commit is contained in:
Frank Palazzolo
R. Belmont
parent
cabb52c75b
commit
3c939b202f
@ -1,5 +1,5 @@
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// license:BSD-3-Clause
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// copyright-holders:Mike Balfour, Ben Bruscella, Sean Young
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// copyright-holders:Mike Balfour, Ben Bruscella, Sean Young, Frank Palazzolo
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/*******************************************************************************************************
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coleco.c
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@ -61,6 +61,11 @@
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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 printer interface (documented)
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Add tape Support
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*/
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#include "emu.h"
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@ -91,6 +96,40 @@ WRITE8_MEMBER( coleco_state::paddle_on_w )
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m_joy_mode = 1;
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}
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READ8_MEMBER( bit90_state::bankswitch_u4_r )
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{
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//osd_printf_verbose("Bankswitch to u4\n");
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m_bank->set_entry(0);
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return 0xff;
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}
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READ8_MEMBER( bit90_state::bankswitch_u3_r )
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{
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//osd_printf_verbose("Bankswitch to u3\n");
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m_bank->set_entry(1);
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return 0xff;
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}
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READ8_MEMBER( bit90_state::keyboard_r )
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{
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if (m_keyselect < 8) {
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return m_io_keyboard[m_keyselect]->read();
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}
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return 0xff;
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}
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WRITE8_MEMBER( bit90_state::u32_w )
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{
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// Write to a 74LS174 at u32
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// Bits 4-7 are connected for keyboard scanning (actually only 4-6 are used)
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// Bits 0-1 unknown (probably tape?)
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m_keyselect = (data >> 4) & 0x0f;
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uint8_t temp = data & 0x03;
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if (m_unknown != temp) {
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m_unknown = temp;
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osd_printf_verbose("m_unknown -> 0x%02x\n",m_unknown);
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}
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}
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/* Memory Maps */
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@ -101,6 +140,15 @@ void coleco_state::coleco_map(address_map &map)
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map(0x8000, 0xffff).rom();
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}
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void bit90_state::bit90_map(address_map &map)
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{
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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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}
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void coleco_state::coleco_io_map(address_map &map)
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{
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map.global_mask(0xff);
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@ -112,6 +160,33 @@ void coleco_state::coleco_io_map(address_map &map)
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map(0xe2, 0xe2).mirror(0x1d).r(FUNC(coleco_state::paddle_2_r));
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}
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void bit90_state::bit90_io_map(address_map &map)
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{
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map.global_mask(0xff);
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map(0x80, 0x80).mirror(0x17).r(FUNC(bit90_state::bankswitch_u4_r));
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map(0x88, 0x88).mirror(0x17).r(FUNC(bit90_state::bankswitch_u3_r));
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map(0x80, 0x80).mirror(0x1f).w(FUNC(coleco_state::paddle_off_w));
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map(0xa0, 0xa1).mirror(0x1e).rw("tms9928a", FUNC(tms9928a_device::read), FUNC(tms9928a_device::write));
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map(0xc0, 0xc0).mirror(0x1f).r(FUNC(bit90_state::keyboard_r));
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map(0xc0, 0xc0).mirror(0x1f).w(FUNC(coleco_state::paddle_on_w));
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map(0xe0, 0xe0).mirror(0x1d).r(FUNC(coleco_state::paddle_1_r));
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map(0xe0, 0xe0).mirror(0x1b).w(FUNC(bit90_state::u32_w)); // bits7-4 for keyscan, (to bcd decoder) and bits1-0 tape out
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map(0xe2, 0xe2).mirror(0x1d).r(FUNC(coleco_state::paddle_2_r)); // also, bit7 is tape read?
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map(0xe4, 0xe4).mirror(0x1b).w("sn76489a", FUNC(sn76489a_device::write));
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// IORQ goes to pin 55 of the Bit90 expansion port,
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// So ports < 0x80 can be decoded there
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// External Printer Interface
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//map(0x48, 0x48).w(FUNC(bit90_state::printer_data_w)); // data to latch here
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//map(0x4a, 0x4a).r(FUNC(bit90_state::printer_control_r)); // bit0 is busy bit
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//map(0x4a, 0x4a).w(FUNC(bit90_state::printer_control_w)); // bit0 is reset (active low), bit1 is latch (active low)
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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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}
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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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@ -119,7 +194,6 @@ void coleco_state::czz50_map(address_map &map)
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map(0x8000, 0xffff).rom();
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}
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/* Input Ports */
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static INPUT_PORTS_START( czz50 )
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@ -162,6 +236,90 @@ static INPUT_PORTS_START( czz50 )
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PORT_BIT( 0xb0, IP_ACTIVE_LOW, IPT_UNKNOWN )
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INPUT_PORTS_END
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static INPUT_PORTS_START( bit90 )
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PORT_INCLUDE( coleco )
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PORT_START("ROW0")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("-") PORT_CODE(KEYCODE_MINUS)
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PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7)
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PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3)
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PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("\\") PORT_CODE(KEYCODE_BACKSLASH)
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PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("INS") PORT_CODE(KEYCODE_INSERT)
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PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1)
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5)
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9)
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PORT_START("ROW1")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("^") PORT_CODE(KEYCODE_TILDE)
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PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8)
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PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4)
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PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BS") PORT_CODE(KEYCODE_BACKSPACE)
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PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("DEL") PORT_CODE(KEYCODE_DEL)
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PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2)
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6)
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0)
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PORT_START("ROW2")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P)
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PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y)
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PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W)
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PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("]") PORT_CODE(KEYCODE_CLOSEBRACE)
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PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("UP") PORT_CODE(KEYCODE_UP)
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PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC)
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R)
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I)
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PORT_START("ROW3")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("[") PORT_CODE(KEYCODE_OPENBRACE)
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PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U)
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PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E)
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PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RUBOUT") PORT_CODE(KEYCODE_HOME)
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PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RIGHT") PORT_CODE(KEYCODE_RIGHT)
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PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q)
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T)
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O)
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PORT_START("ROW4")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(";") PORT_CODE(KEYCODE_COLON)
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PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H)
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PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S)
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PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("@") PORT_CODE(KEYCODE_END)
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PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("/") PORT_CODE(KEYCODE_SLASH)
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PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CAPS") PORT_CODE(KEYCODE_CAPSLOCK)
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F)
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K)
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PORT_START("ROW5")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(":") PORT_CODE(KEYCODE_QUOTE)
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PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J)
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PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D)
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PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER)
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PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(".") PORT_CODE(KEYCODE_STOP)
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PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A)
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G)
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L)
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PORT_START("ROW6")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N)
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PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V)
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PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X)
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PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M)
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PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(",") PORT_CODE(KEYCODE_COMMA)
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PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z)
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C)
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B)
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PORT_START("ROW7")
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PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("SHIFT") PORT_CODE(KEYCODE_LSHIFT)
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PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("META") PORT_CODE(KEYCODE_RALT)
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PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BASIC") PORT_CODE(KEYCODE_LALT)
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PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LEFT") PORT_CODE(KEYCODE_LEFT)
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PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("DOWN") PORT_CODE(KEYCODE_DOWN)
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PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL)
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PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("SPACE") PORT_CODE(KEYCODE_SPACE)
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PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("FCTN") PORT_CODE(KEYCODE_RCONTROL)
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INPUT_PORTS_END
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/* Interrupts */
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@ -352,11 +510,24 @@ void coleco_state::machine_start()
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save_item(NAME(m_joy_analog_reload));
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}
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void bit90_state::machine_start()
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{
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coleco_state::machine_start();
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uint8_t *banked = memregion("banked")->base();
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m_bank->configure_entries(0, 0x02, banked, 0x2000);
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}
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void coleco_state::machine_reset()
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{
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m_last_nmi_state = 0;
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}
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void bit90_state::machine_reset()
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{
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coleco_state::machine_reset();
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m_bank->set_entry(0);
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}
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//static image_verify_result coleco_cart_verify(const uint8_t *cartdata, size_t size)
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//{
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// int retval = image_verify_result::FAIL;
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@ -414,6 +585,36 @@ void coleco_state::colecop(machine_config &config)
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vdp.int_callback().set(FUNC(coleco_state::coleco_vdp_interrupt));
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}
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void bit90_state::bit90(machine_config &config)
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{
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/* basic machine hardware */
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Z80(config, m_maincpu, XTAL(7'159'090)/2); // 3.579545 MHz
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m_maincpu->set_addrmap(AS_PROGRAM, &bit90_state::bit90_map);
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m_maincpu->set_addrmap(AS_IO, &bit90_state::bit90_io_map);
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/* video hardware */
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tms9929a_device &vdp(TMS9929A(config, "tms9928a", XTAL(10'738'635)));
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vdp.set_screen("screen");
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vdp.set_vram_size(0x4000);
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vdp.int_callback().set(FUNC(coleco_state::coleco_vdp_interrupt));
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SCREEN(config, "screen", SCREEN_TYPE_RASTER);
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/* sound hardware */
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SPEAKER(config, "mono").front_center();
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sn76489a_device &psg(SN76489A(config, "sn76489a", XTAL(7'159'090)/2)); // 3.579545 MHz
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psg.add_route(ALL_OUTPUTS, "mono", 1.00);
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// TODO: enable when Z80 has better WAIT pin emulation, this currently breaks pitfall2 for example
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//psg.ready_cb().set_inputline("maincpu", Z80_INPUT_LINE_WAIT).invert();
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/* cartridge */
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COLECOVISION_CARTRIDGE_SLOT(config, m_cart, colecovision_cartridges, nullptr);
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/* software lists */
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SOFTWARE_LIST(config, "cart_list").set_original("coleco");
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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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void coleco_state::czz50(machine_config &config)
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{
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coleco(config);
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@ -485,6 +686,21 @@ ROM_END
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#define rom_dina rom_czz50
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#define rom_prsarcde rom_czz50
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ROM_START( bit90b3 )
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ROM_REGION( 0x4000, "banked", 0 )
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ROM_LOAD("bit90b3.u4", 0x0000, 0x2000, CRC(06d21fc2) SHA1(6d296b09b661babd4c2ef6993f8e768a67932388))
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ROM_LOAD("bit90b3.u3", 0x2000, 0x2000, CRC(61fdccbb) SHA1(25cac13627c0916d3ed2b92f0b2218b405de5be4))
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ROM_REGION( 0x10000, "maincpu", 0 )
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ROM_LOAD("bit90b3.u2", 0x2000, 0x2000, CRC(b992b940) SHA1(c7dd96a1944fac40cbae20630f303a69de7e6313))
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ROM_END
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ROM_START( bit90 )
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ROM_REGION( 0x4000, "banked", 0 )
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ROM_LOAD("d32351e.u4", 0x0000, 0x2000, NO_DUMP) // BIT-99C1
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ROM_LOAD("d32521e.u3", 0x2000, 0x2000, NO_DUMP) // MONITOR2
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ROM_REGION( 0x10000, "maincpu", 0 )
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ROM_LOAD("d32522e.u2", 0x2000, 0x2000, NO_DUMP) // MONITOR3
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ROM_END
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/* System Drivers */
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@ -495,3 +711,7 @@ 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 (BASIC 3.1)", 0 )
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COMP( 1983, bit90b3, bit90, 0, bit90, bit90, bit90_state, empty_init, "Bit Corporation", "Bit90 (BASIC 3.0)", 0 )
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@ -1,5 +1,5 @@
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// license:BSD-3-Clause
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// copyright-holders:Mike Balfour, Ben Bruscella, Sean Young
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// copyright-holders:Mike Balfour, Ben Bruscella, Sean Young, Frank Palazzolo
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#pragma once
|
||||
|
||||
#ifndef MAME_INCLUDES_COLECO_H
|
||||
@ -66,7 +66,7 @@ public:
|
||||
void coleco_io_map(address_map &map);
|
||||
void coleco_map(address_map &map);
|
||||
void czz50_map(address_map &map);
|
||||
private:
|
||||
protected:
|
||||
required_device<cpu_device> m_maincpu;
|
||||
required_device<colecovision_cartridge_slot_device> m_cart;
|
||||
required_shared_ptr<uint8_t> m_ram;
|
||||
@ -103,4 +103,34 @@ private:
|
||||
optional_ioport m_roller_y;
|
||||
};
|
||||
|
||||
class bit90_state : public coleco_state
|
||||
{
|
||||
public:
|
||||
bit90_state(const machine_config &mconfig, device_type type, const char *tag)
|
||||
: coleco_state(mconfig, type, tag),
|
||||
m_bank(*this, "bank"),
|
||||
m_io_keyboard(*this, {"ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6", "ROW7"})
|
||||
{}
|
||||
|
||||
virtual void machine_start() override;
|
||||
virtual void machine_reset() override;
|
||||
|
||||
void bit90(machine_config &config);
|
||||
|
||||
DECLARE_READ8_MEMBER( bankswitch_u4_r );
|
||||
DECLARE_READ8_MEMBER( bankswitch_u3_r );
|
||||
DECLARE_READ8_MEMBER( keyboard_r );
|
||||
DECLARE_WRITE8_MEMBER( u32_w );
|
||||
|
||||
uint8_t m_keyselect;
|
||||
uint8_t m_unknown;
|
||||
protected:
|
||||
required_memory_bank m_bank;
|
||||
required_ioport_array<8> m_io_keyboard;
|
||||
|
||||
private:
|
||||
void bit90_map(address_map &map);
|
||||
void bit90_io_map(address_map &map);
|
||||
};
|
||||
|
||||
#endif
|
||||
|
||||
@ -10320,6 +10320,8 @@ czz50 // Bit Corporation Chuang Zao Zhe 50
|
||||
dina // Telegames Dina
|
||||
onyx // Microdigital ONYX (Brazilian Coleco clone / unreleased prototype)
|
||||
prsarcde // Telegames Personal Arcade
|
||||
bit90b3 // Bit Corporation Bit90 (BASIC 3.0)
|
||||
bit90 // Bit Corporation Bit90 (BASIC 3.1)
|
||||
|
||||
@source:combatsc.cpp
|
||||
bootcamp // GX611 (c) 1987
|
||||
|
||||
Loading…
Reference in New Issue
Block a user