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Diffstat (limited to 'src/mame/drivers/pegasus.cpp')
-rw-r--r--src/mame/drivers/pegasus.cpp581
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diff --git a/src/mame/drivers/pegasus.cpp b/src/mame/drivers/pegasus.cpp
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--- a/src/mame/drivers/pegasus.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Robbbert
-/***************************************************************************
-
- Aamber Pegasus computer (New Zealand)
-
- http://web.mac.com/lord_philip/aamber_pegasus/Aamber_Pegasus.html
-
- Each copy of the monitor rom was made for an individual machine.
- The early bios versions checked that it was running on that
- particular computer.
-
- This computer has no sound.
-
- The usual way of loading a new rom was to plug it into the board.
- We have replaced this with cartslots, to save having to recompile
- whenever a new rom is found. Single rom programs will usually work in
- any slot (if it is going to work at all). A working rom will appear
- in the menu. Press the first letter to run it.
-
- If a machine language program is loaded via cassette, do it in the
- Monitor (L command), when loaded press Enter, and it will be in the
- menu.
-
- Basic cassettes are loaded in the usual way, that is, start Basic,
- type LOAD, press Enter. When done, RUN or LIST as needed.
-
- The Aamber Pegasus uses a MCM66710P, which is functionally
- equivalent to the MCM6571.
-
- Note that datasheet is incorrect for the number "9".
- The first byte is really 0x3E rather than 0x3F, confirmed on real
- hardware.
-
- TO DO:
- - Work on the other non-working programs
-
-****************************************************************************/
-
-#include "emu.h"
-#include "bus/generic/carts.h"
-#include "bus/generic/slot.h"
-#include "cpu/m6809/m6809.h"
-#include "imagedev/cassette.h"
-#include "machine/6821pia.h"
-#include "machine/timer.h"
-#include "emupal.h"
-#include "screen.h"
-#include "softlist.h"
-#include "speaker.h"
-
-
-class pegasus_state : public driver_device
-{
-public:
- pegasus_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_cass(*this, "cassette")
- , m_pia_s(*this, "pia_s")
- , m_pia_u(*this, "pia_u")
- , m_exp_00(*this, "exp00")
- , m_exp_01(*this, "exp01")
- , m_exp_02(*this, "exp02")
- , m_exp_0c(*this, "exp0c")
- , m_exp_0d(*this, "exp0d")
- , m_p_videoram(*this, "videoram")
- , m_p_chargen(*this, "chargen")
- , m_p_pcgram(*this, "pcg")
- , m_io_keyboard(*this, "KEY.%u", 0)
- { }
-
- void pegasusm(machine_config &config);
- void pegasus(machine_config &config);
-
- void init_pegasus();
-
-private:
- DECLARE_READ8_MEMBER(pegasus_keyboard_r);
- DECLARE_READ8_MEMBER(pegasus_protection_r);
- DECLARE_READ8_MEMBER(pegasus_pcg_r);
- DECLARE_WRITE8_MEMBER(pegasus_controls_w);
- DECLARE_WRITE8_MEMBER(pegasus_keyboard_w);
- DECLARE_WRITE8_MEMBER(pegasus_pcg_w);
- DECLARE_READ_LINE_MEMBER(pegasus_keyboard_irq);
- DECLARE_READ_LINE_MEMBER(pegasus_cassette_r);
- DECLARE_WRITE_LINE_MEMBER(pegasus_cassette_w);
- DECLARE_WRITE_LINE_MEMBER(pegasus_firq_clr);
- uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
- TIMER_DEVICE_CALLBACK_MEMBER(pegasus_firq);
- image_init_result load_cart(device_image_interface &image, generic_slot_device *slot, const char *reg_tag);
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp00_load) { return load_cart(image, m_exp_00, "0000"); }
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp01_load) { return load_cart(image, m_exp_01, "1000"); }
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp02_load) { return load_cart(image, m_exp_02, "2000"); }
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp0c_load) { return load_cart(image, m_exp_0c, "c000"); }
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp0d_load) { return load_cart(image, m_exp_0d, "d000"); }
-
- void pegasus_mem(address_map &map);
- void pegasusm_mem(address_map &map);
-
- uint8_t m_kbd_row;
- bool m_kbd_irq;
- uint8_t m_control_bits;
- virtual void machine_reset() override;
- virtual void machine_start() override;
- void pegasus_decrypt_rom(uint8_t *ROM);
- required_device<cpu_device> m_maincpu;
- required_device<cassette_image_device> m_cass;
- required_device<pia6821_device> m_pia_s;
- required_device<pia6821_device> m_pia_u;
- required_device<generic_slot_device> m_exp_00;
- required_device<generic_slot_device> m_exp_01;
- required_device<generic_slot_device> m_exp_02;
- required_device<generic_slot_device> m_exp_0c;
- required_device<generic_slot_device> m_exp_0d;
- required_shared_ptr<uint8_t> m_p_videoram;
- required_region_ptr<u8> m_p_chargen;
- required_region_ptr<u8> m_p_pcgram;
- required_ioport_array<8> m_io_keyboard;
-};
-
-TIMER_DEVICE_CALLBACK_MEMBER(pegasus_state::pegasus_firq)
-{
- m_maincpu->set_input_line(M6809_FIRQ_LINE, HOLD_LINE);
-}
-
-WRITE_LINE_MEMBER( pegasus_state::pegasus_firq_clr )
-{
- m_maincpu->set_input_line(M6809_FIRQ_LINE, CLEAR_LINE);
-}
-
-READ8_MEMBER( pegasus_state::pegasus_keyboard_r )
-{
- uint8_t i,data = 0xff;
- for (i = 0; i < 8; i++)
- if (!BIT(m_kbd_row, i)) data &= m_io_keyboard[i]->read();
-
- m_kbd_irq = (data == 0xff) ? 1 : 0;
- if (BIT(m_control_bits, 3))
- data<<=4;
- return data;
-}
-
-WRITE8_MEMBER( pegasus_state::pegasus_keyboard_w )
-{
- m_kbd_row = data;
-}
-
-WRITE8_MEMBER( pegasus_state::pegasus_controls_w )
-{
-/* d0,d2 - not emulated
- d0 - Blank - Video blanking
- d1 - Char - select character rom or ram
- d2 - Page - enables writing to video ram
- d3 - Asc - Select which half of the keyboard to read
-*/
-
- m_control_bits = data;
-}
-
-READ_LINE_MEMBER( pegasus_state::pegasus_keyboard_irq )
-{
- return m_kbd_irq;
-}
-
-READ_LINE_MEMBER( pegasus_state::pegasus_cassette_r )
-{
- return m_cass->input();
-}
-
-WRITE_LINE_MEMBER( pegasus_state::pegasus_cassette_w )
-{
- m_cass->output(state ? 1 : -1);
-}
-
-READ8_MEMBER( pegasus_state::pegasus_pcg_r )
-{
- uint8_t code = m_p_videoram[offset] & 0x7f;
- return m_p_pcgram[(code << 4) | (~m_kbd_row & 15)];
-}
-
-WRITE8_MEMBER( pegasus_state::pegasus_pcg_w )
-{
-// if (BIT(m_control_bits, 1))
- {
- uint8_t code = m_p_videoram[offset] & 0x7f;
- m_p_pcgram[(code << 4) | (~m_kbd_row & 15)] = data;
- }
-}
-
-/* Must return the A register except when it is doing a rom search */
-READ8_MEMBER( pegasus_state::pegasus_protection_r )
-{
- uint8_t data = m_maincpu->state_int(M6809_A);
- if (data == 0x20) data = 0xff;
- return data;
-}
-
-void pegasus_state::pegasus_mem(address_map &map)
-{
- map.unmap_value_high();
- //map(0x0000, 0x2fff) // mapped by the cartslots 1-3
- map(0xb000, 0xbdff).ram();
- map(0xbe00, 0xbfff).ram().share("videoram");
- //map(0xc000, 0xdfff) // mapped by the cartslots 4-5
- map(0xe000, 0xe1ff).r(FUNC(pegasus_state::pegasus_protection_r));
- map(0xe200, 0xe3ff).rw(FUNC(pegasus_state::pegasus_pcg_r), FUNC(pegasus_state::pegasus_pcg_w));
- map(0xe400, 0xe403).mirror(0x1fc).rw(m_pia_u, FUNC(pia6821_device::read), FUNC(pia6821_device::write));
- map(0xe600, 0xe603).mirror(0x1fc).rw(m_pia_s, FUNC(pia6821_device::read), FUNC(pia6821_device::write));
- map(0xf000, 0xffff).rom();
-}
-
-void pegasus_state::pegasusm_mem(address_map &map)
-{
- map.unmap_value_high();
- pegasus_mem(map);
- map(0x5000, 0xafff).ram();
-}
-
-/* Input ports */
-static INPUT_PORTS_START( pegasus )
- PORT_START("KEY.0")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("= +") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("0 )") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BackSpace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) PORT_CHAR(8)
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Break") PORT_CODE(KEYCODE_NUMLOCK) PORT_CHAR(20)
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\\ |") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("; :") PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l') PORT_CHAR(13)
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p') PORT_CHAR(16)
-
- PORT_START("KEY.1")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("- _") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Tab") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("[ ]") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR(']')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Delete") PORT_CODE(KEYCODE_DEL) PORT_CHAR(127) PORT_CHAR('_')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\' \"") PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i') PORT_CHAR(9)
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k') PORT_CHAR(11)
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o') PORT_CHAR(15)
-
- PORT_START("KEY.2")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("5 %") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("8 *") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("6 ^") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("` ~") PORT_CODE(KEYCODE_TILDE) PORT_CHAR('`') PORT_CHAR('~')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("/ ?") PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j') PORT_CHAR(10)
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u') PORT_CHAR(21)
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g') PORT_CHAR(7)
-
- PORT_START("KEY.3")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t') PORT_CHAR(20)
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("7 &") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("4 $") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED ) // outputs a space
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ShiftR") PORT_NAME("ShiftR") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(". >") PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h') PORT_CHAR(8)
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y') PORT_CHAR(25)
-
- PORT_START("KEY.4")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r') PORT_CHAR(18)
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w') PORT_CHAR(23)
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) // outputs a space
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(", <") PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c') PORT_CHAR(3)
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f') PORT_CHAR(6)
-
- PORT_START("KEY.5")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e') PORT_CHAR(5)
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q') PORT_CHAR(17)
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED ) // REPEAT key which is disconnected - outputs a space
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("1 !") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LineFeed") PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(10)
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m') PORT_CHAR(13)
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d') PORT_CHAR(4)
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n') PORT_CHAR(14)
-
- PORT_START("KEY.6")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v') PORT_CHAR(22)
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a') PORT_CHAR(1)
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Tab") PORT_CODE(KEYCODE_TAB) PORT_CHAR(9)
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Esc") PORT_CODE(KEYCODE_ESC) PORT_CHAR(27)
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x') PORT_CHAR(24)
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BlankL") PORT_CODE(KEYCODE_0_PAD) PORT_CHAR(16)
-
- PORT_START("KEY.7")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b') PORT_CHAR(2)
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('s') PORT_CHAR(19)
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CapsLock") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(19)
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2)
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ShiftL") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BlankR") PORT_CODE(KEYCODE_DEL_PAD) PORT_CHAR(21)
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z') PORT_CHAR(26)
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("{ }") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('{') PORT_CHAR('}')
-INPUT_PORTS_END
-
-static const uint8_t mcm6571a_shift[] =
-{
- 0,1,1,0,0,0,1,0,0,0,0,1,0,0,0,0,
- 1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,
- 1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0
-};
-
-
-uint32_t pegasus_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
-{
- uint8_t y,ra,chr,gfx,inv;
- uint16_t sy=0,ma=0,x;
- bool pcg_mode = BIT(m_control_bits, 1);
-
- for(y = 0; y < 16; y++ )
- {
- for(ra = 0; ra < 16; ra++ )
- {
- uint16_t *p = &bitmap.pix16(sy++);
-
- for(x = ma; x < ma + 32; x++ )
- {
- inv = 0xff;
- chr = m_p_videoram[x];
-
- if (BIT(chr, 7))
- {
- inv = 0;
- chr &= 0x7f;
- }
-
- if (pcg_mode)
- {
- gfx = m_p_pcgram[(chr << 4) | ra] ^ inv;
- }
- else
- if (mcm6571a_shift[chr])
- {
- if (ra < 3)
- gfx = inv;
- else
- gfx = m_p_chargen[(chr<<4) | (ra-3) ] ^ inv;
- }
- else
- {
- if (ra < 10)
- gfx = m_p_chargen[(chr<<4) | ra ] ^ inv;
- else
- gfx = inv;
- }
-
- /* Display a scanline of a character */
- *p++ = BIT(gfx, 7);
- *p++ = BIT(gfx, 6);
- *p++ = BIT(gfx, 5);
- *p++ = BIT(gfx, 4);
- *p++ = BIT(gfx, 3);
- *p++ = BIT(gfx, 2);
- *p++ = BIT(gfx, 1);
- *p++ = BIT(gfx, 0);
- }
- }
- ma+=32;
- }
- return 0;
-}
-
-/* F4 Character Displayer */
-static const gfx_layout pegasus_charlayout =
-{
- 8, 16, /* text = 7 x 9, pcg = 8 x 16 */
- 128, /* 128 characters */
- 1, /* 1 bits per pixel */
- { 0 }, /* no bitplanes */
- /* x offsets */
- { 0, 1, 2, 3, 4, 5, 6, 7 },
- /* y offsets */
- { 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 },
- 8*16 /* every char takes 16 bytes */
-};
-
-static GFXDECODE_START( gfx_pegasus )
- GFXDECODE_ENTRY( "chargen", 0x0000, pegasus_charlayout, 0, 1 )
- GFXDECODE_ENTRY( "pcg", 0x0000, pegasus_charlayout, 0, 1 )
-GFXDECODE_END
-
-
-// An encrypted single rom starts with 02, decrypted with 20.
-// The 2nd and 3rd part of a multi-rom set will have no obvious byte,
-// so we check the first 4 bytes for a signature, and decrypt if found.
-void pegasus_state::pegasus_decrypt_rom(uint8_t *ROM)
-{
- bool doit = false;
- uint8_t b;
- uint16_t j;
- std::vector<uint8_t> temp_copy;
- temp_copy.resize(0x1000);
-
- if (ROM[0] == 0x02) doit = true;
- if (ROM[0] == 0x1e && ROM[1] == 0xfa && ROM[2] == 0x60 && ROM[3] == 0x71) doit = true; // xbasic 2nd rom
- if (ROM[0] == 0x72 && ROM[1] == 0x62 && ROM[2] == 0xc6 && ROM[3] == 0x36) doit = true; // xbasic 3rd rom
- if (ROM[0] == 0xf0 && ROM[1] == 0x40 && ROM[2] == 0xce && ROM[3] == 0x80) doit = true; // forth 2nd rom (both sets)
- if (ROM[0] == 0x80 && ROM[1] == 0x06 && ROM[2] == 0x68 && ROM[3] == 0x14) doit = true; // pascal 2nd rom
-
- if (doit)
- {
- for (int i = 0; i < 0x1000; i++)
- {
- b = ROM[i];
- j = bitswap<16>(i, 15, 14, 13, 12, 11, 10, 9, 8, 0, 1, 2, 3, 4, 5, 6, 7);
- b = bitswap<8>(b, 3, 2, 1, 0, 7, 6, 5, 4);
- temp_copy[j & 0xfff] = b;
- }
- memcpy(ROM, &temp_copy[0], 0x1000);
- }
-}
-
-image_init_result pegasus_state::load_cart(device_image_interface &image, generic_slot_device *slot, const char *reg_tag)
-{
- uint32_t size = slot->common_get_size(reg_tag);
- bool any_socket = false;
-
- if (size > 0x1000)
- {
- image.seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported cartridge size");
- return image_init_result::FAIL;
- }
-
- if (image.loaded_through_softlist() && size == 0)
- {
- // we might be loading a cart compatible with all sockets!
- // so try to get region "rom"
- size = slot->common_get_size("rom");
- any_socket = true;
-
- if (size == 0)
- {
- std::string errmsg = string_format(
- "Attempted to load a file that does not work in this socket.\n"
- "Please check \"Usage\" field in the software list for the correct socket(s) to use.");
- image.seterror(IMAGE_ERROR_UNSPECIFIED, errmsg.c_str());
- return image_init_result::FAIL;
- }
- }
-
- slot->rom_alloc(0x1000, GENERIC_ROM8_WIDTH, ENDIANNESS_LITTLE); // we alloc 0x1000 also for smaller roms!
- slot->common_load_rom(slot->get_rom_base(), size, any_socket ? "rom" : reg_tag);
-
- // raw images have to be decrypted (in particular the ones from softlist)
- pegasus_decrypt_rom(slot->get_rom_base());
-
- return image_init_result::PASS;
-}
-
-void pegasus_state::machine_start()
-{
- if (m_exp_00->exists())
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x0000, 0x0fff, read8sm_delegate(*m_exp_00, FUNC(generic_slot_device::read_rom)));
- if (m_exp_01->exists())
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_exp_01, FUNC(generic_slot_device::read_rom)));
- if (m_exp_02->exists())
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x2000, 0x2fff, read8sm_delegate(*m_exp_02, FUNC(generic_slot_device::read_rom)));
- if (m_exp_0c->exists())
- m_maincpu->space(AS_PROGRAM).install_read_handler(0xc000, 0xcfff, read8sm_delegate(*m_exp_0c, FUNC(generic_slot_device::read_rom)));
- if (m_exp_0d->exists())
- m_maincpu->space(AS_PROGRAM).install_read_handler(0xd000, 0xdfff, read8sm_delegate(*m_exp_0d, FUNC(generic_slot_device::read_rom)));
-}
-
-void pegasus_state::machine_reset()
-{
- m_kbd_row = 0;
- m_kbd_irq = 1;
- m_control_bits = 0;
-}
-
-void pegasus_state::init_pegasus()
-{
- // decrypt monitor
- uint8_t *base = memregion("maincpu")->base() + 0xf000;
- pegasus_decrypt_rom(base);
-}
-
-void pegasus_state::pegasus(machine_config &config)
-{
- /* basic machine hardware */
- MC6809(config, m_maincpu, XTAL(4'000'000)); // actually a 6809C - 4MHZ clock coming in, 1MHZ internally
- m_maincpu->set_addrmap(AS_PROGRAM, &pegasus_state::pegasus_mem);
-
- TIMER(config, "pegasus_firq").configure_periodic(FUNC(pegasus_state::pegasus_firq), attotime::from_hz(400));
-
- /* video hardware */
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
- screen.set_refresh_hz(50);
- screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
- screen.set_screen_update(FUNC(pegasus_state::screen_update));
- screen.set_size(32*8, 16*16);
- screen.set_visarea(0, 32*8-1, 0, 16*16-1);
- screen.set_palette("palette");
- GFXDECODE(config, "gfxdecode", "palette", gfx_pegasus);
- PALETTE(config, "palette", palette_device::MONOCHROME);
-
- /* sound hardware */
- SPEAKER(config, "mono").front_center();
-
- /* devices */
- PIA6821(config, m_pia_s, 0);
- m_pia_s->readpb_handler().set(FUNC(pegasus_state::pegasus_keyboard_r));
- m_pia_s->readca1_handler().set(FUNC(pegasus_state::pegasus_cassette_r));
- m_pia_s->readcb1_handler().set(FUNC(pegasus_state::pegasus_keyboard_irq));
- m_pia_s->writepa_handler().set(FUNC(pegasus_state::pegasus_keyboard_w));
- m_pia_s->writepb_handler().set(FUNC(pegasus_state::pegasus_controls_w));
- m_pia_s->ca2_handler().set(FUNC(pegasus_state::pegasus_cassette_w));
- m_pia_s->cb2_handler().set(FUNC(pegasus_state::pegasus_firq_clr));
- m_pia_s->irqa_handler().set_inputline("maincpu", M6809_IRQ_LINE);
- m_pia_s->irqb_handler().set_inputline("maincpu", M6809_IRQ_LINE);
-
- PIA6821(config, m_pia_u, 0);
- m_pia_u->irqa_handler().set_inputline("maincpu", M6809_IRQ_LINE);
- m_pia_u->irqb_handler().set_inputline("maincpu", M6809_IRQ_LINE);
-
- GENERIC_SOCKET(config, "exp00", generic_plain_slot, "pegasus_cart").set_device_load(FUNC(pegasus_state::exp00_load));
- GENERIC_SOCKET(config, "exp01", generic_plain_slot, "pegasus_cart").set_device_load(FUNC(pegasus_state::exp01_load));
- GENERIC_SOCKET(config, "exp02", generic_plain_slot, "pegasus_cart").set_device_load(FUNC(pegasus_state::exp02_load));
- GENERIC_SOCKET(config, "exp0c", generic_plain_slot, "pegasus_cart").set_device_load(FUNC(pegasus_state::exp0c_load));
- GENERIC_SOCKET(config, "exp0d", generic_plain_slot, "pegasus_cart").set_device_load(FUNC(pegasus_state::exp0d_load));
-
- CASSETTE(config, m_cass);
- m_cass->set_default_state(CASSETTE_STOPPED|CASSETTE_MOTOR_ENABLED);
- m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
-
- /* Software lists */
- SOFTWARE_LIST(config, "cart_list").set_original("pegasus_cart");
-}
-
-void pegasus_state::pegasusm(machine_config &config)
-{
- pegasus(config);
- m_maincpu->set_addrmap(AS_PROGRAM, &pegasus_state::pegasusm_mem);
-}
-
-
-/* ROM definition */
-ROM_START( pegasus )
- ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
- ROM_SYSTEM_BIOS(0, "11r2674", "Monitor 1.1 r2674")
- ROMX_LOAD( "mon11_2674.bin", 0xf000, 0x1000, CRC(1640ff7e) SHA1(8199643749fb40fb8be05e9f311c75620ca939b1), ROM_BIOS(0) )
- ROM_SYSTEM_BIOS(1, "10r2569", "Monitor 1.0 r2569")
- ROMX_LOAD( "mon10_2569.bin", 0xf000, 0x1000, CRC(910fc930) SHA1(a4f6bbe5def0268cc49ee7045616a39017dd8052), ROM_BIOS(1) )
- ROM_SYSTEM_BIOS(2, "11r2569", "Monitor 1.1 r2569")
- ROMX_LOAD( "mon11_2569.bin", 0xf000, 0x1000, CRC(07b92002) SHA1(3c434601120870c888944ecd9ade5186432ddbc2), ROM_BIOS(2) )
- ROM_SYSTEM_BIOS(3, "11r2669", "Monitor 1.1 r2669")
- ROMX_LOAD( "mon11_2669.bin", 0xf000, 0x1000, CRC(f3ee23c8) SHA1(3ac96935668f5e53799c90db5140393c2ef9ce36), ROM_BIOS(3) )
- ROM_SYSTEM_BIOS(4, "22r2856", "Monitor 2.2 r2856")
- ROMX_LOAD( "mon22_2856.bin", 0xf000, 0x1000, CRC(5f5f688a) SHA1(3719eecc347e158dd027ea7aa8a068cdafc00d9b), ROM_BIOS(4) )
- ROM_SYSTEM_BIOS(5, "22br2856", "Monitor 2.2B r2856")
- ROMX_LOAD( "mon22b_2856.bin", 0xf000, 0x1000, CRC(a47b0308) SHA1(f215e51aa8df6aed99c10f3df6a3589cb9f63d46), ROM_BIOS(5) )
- ROM_SYSTEM_BIOS(6, "23r2601", "Monitor 2.3 r2601")
- ROMX_LOAD( "mon23_2601.bin", 0xf000, 0x1000, CRC(0e024222) SHA1(9950cba08996931b9d5a3368b44c7309638b4e08), ROM_BIOS(6) )
- ROM_SYSTEM_BIOS(7, "23ar2569", "Monitor 2.3A r2569")
- ROMX_LOAD( "mon23a_2569.bin", 0xf000, 0x1000, CRC(248e62c9) SHA1(adbde27e69b38b29ff89bacf28d0240a8e5d90f3), ROM_BIOS(7) )
-
- ROM_REGION( 0x800, "chargen", 0 )
- ROM_LOAD( "6571.bin", 0x0000, 0x0800, CRC(5a25144b) SHA1(7b9fee0c8ef2605b85d12b6d9fe8feb82418c63a) )
-
- ROM_REGION( 0x800, "pcg", ROMREGION_ERASEFF )
-ROM_END
-
-#define rom_pegasusm rom_pegasus
-
-/* Driver */
-
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 1981, pegasus, 0, 0, pegasus, pegasus, pegasus_state, init_pegasus, "Technosys", "Aamber Pegasus", MACHINE_NO_SOUND_HW )
-COMP( 1981, pegasusm, pegasus, 0, pegasusm, pegasus, pegasus_state, init_pegasus, "Technosys", "Aamber Pegasus with RAM expansion unit", MACHINE_NO_SOUND_HW )