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Diffstat (limited to 'src/mame/drivers/max80.cpp')
-rw-r--r-- | src/mame/drivers/max80.cpp | 506 |
1 files changed, 0 insertions, 506 deletions
diff --git a/src/mame/drivers/max80.cpp b/src/mame/drivers/max80.cpp deleted file mode 100644 index db578307588..00000000000 --- a/src/mame/drivers/max80.cpp +++ /dev/null @@ -1,506 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Robbbert -/*************************************************************************** - -A business-only clone of the TRS-80 Model III. - -All controllers are built-in. Disk drives are required. It can -boot from any size floppy or from a hard disk. All the drives are -in external enclosures. External connections are: -- 5.25 floppy connector (up to 4 drives) -- 8 floppy connector (up to 4 drives) -- HD connector (1 only, gives total of 9 drives) -- Serial A -- Serial B -- Expansion I/O - -All configuration comes from the floppy image. This includes setting up -the CRTC, the character generator, the SIO and the keyboard. - -There was a Technical Manual, but I was unable to find a copy, and so -everything in here is based upon what could be gleaned from the schematic. - -There's IMD floppy images available, but it's unknown what kind of drive -is needed. I was not able to boot anything. - -Organisation of memory: -- There's 128K of RAM, split into 32k sections. Bits 6,7 of 7FC control the - banking. According to the disassembly, 0x80 selects A1 and B1, while 0x40 - selects A1 and A2. I presume that the 64K banks are A and B, and their 32K - halves are 1 and 2. It's unknown what combinations 0x00 and 0xC0 select. - -- Overlaid on this is a special 4K-sized bank which holds the ROM, the video - RAM and all the devices. This bank can be anywhere in memory on a 4K boundary - chosen by writing to x7DC. Further, the 4K bank has some unassigned areas, - allowing the underlying main ram to shine through. It's unknown what happens - if you attempt to write to ROM. The bank is initially at address 0-FFF. - -NOTE on character generation: -- There's no character generator ROM. All definitions are in a 6116 RAM at - an unknown address within the 4K bank. Therefore nothing can be seen until - a successful boot from disk, which contains the font data, and also does - initialisation of the CRTC. Video RAM resides in another 6116, which is - also in the 4K bank. - -Booting: -- A sector is read into main RAM starting at 0x400. Then it is executed and - the process of booting can begin. In TRS-80 compatible-mode (a disk program), - the 4K bank is moved to 0x3000. - -*************************************************************************** - - -To Do: Almost everything. -Status: Beeps every so often. Unable to read the disk. - - -***************************************************************************/ - -#include "emu.h" -#include "cpu/z80/z80.h" -//#include "machine/ram.h" -#include "imagedev/floppy.h" -#include "imagedev/snapquik.h" -#include "machine/z80sio.h" -#include "machine/z80pio.h" -#include "machine/com8116.h" -#include "machine/msm5832.h" -//#include "bus/rs232/rs232.h" -#include "machine/wd_fdc.h" -#include "sound/beep.h" -#include "machine/timer.h" -#include "video/mc6845.h" -#include "emupal.h" -#include "screen.h" -#include "speaker.h" -#include "formats/imd_dsk.h" -//#include "formats/trs80_dsk.h" -//#include "formats/dmk_dsk.h" - -class max80_state : public driver_device -{ -public: - max80_state(const machine_config &mconfig, device_type type, const char *tag) - : driver_device(mconfig, type, tag) - , m_maincpu(*this, "maincpu") -// , m_p_chargen(*this, "chargen") -// , m_vram(*this, "videoram") - , m_palette(*this, "palette") - , m_pio(*this, "pio") - , m_crtc(*this, "crtc") - , m_uart(*this, "uart") - , m_brg(*this, "brg") - , m_beep(*this, "beeper") - , m_beep_timer(*this, "beep_timer") - , m_rtc(*this, "rtc") - , m_fdc(*this, "fdc") - , m_floppy0(*this, "fdc:0") - , m_floppy1(*this, "fdc:1") - , m_floppy2(*this, "fdc:2") - , m_floppy3(*this, "fdc:3") - , m_io_keyboard(*this, "LINE%u", 0U) -// , m_mainram(*this, RAM_TAG) - { } - - void max80(machine_config &config); - -protected: - virtual void machine_start() override; - virtual void machine_reset() override; - -private: - static void floppy_formats(format_registration &fr); - u8 keyboard_r(offs_t offset); - void beep_w(offs_t offset, u8 data); - void mode_w(offs_t offset, u8 data); - void drive_w(offs_t offset, u8 data); - u8 fdc_status_r(offs_t offset); - u8 pio_pa_r(offs_t offset); - void pio_pa_w(offs_t offset, u8 data); - void pio_pb_w(offs_t offset, u8 data); - - DECLARE_WRITE_LINE_MEMBER(intrq_w); - DECLARE_WRITE_LINE_MEMBER(drq_w); - MC6845_UPDATE_ROW(crtc_update_row); - TIMER_DEVICE_CALLBACK_MEMBER(beep_timer); - - void mem_map(address_map &map); - - u8 m_size_store = 0; - bool m_fdc_drq = 0; - bool m_fdc_int = 0; - bool m_allow_nmi = 0; - u8 m_mode = 0; - floppy_image_device *m_floppy; - required_device<cpu_device> m_maincpu; - //required_region_ptr<u8> m_p_chargen; - //required_shared_ptr<u8> m_p_vram; - required_device<palette_device> m_palette; - required_device<z80pio_device> m_pio; - required_device<mc6845_device> m_crtc; - required_device<z80sio_device> m_uart; - required_device<com8116_device> m_brg; - required_device<beep_device> m_beep; - required_device<timer_device> m_beep_timer; - required_device<msm5832_device> m_rtc; - required_device<mb8876_device> m_fdc; - required_device<floppy_connector> m_floppy0; - required_device<floppy_connector> m_floppy1; - required_device<floppy_connector> m_floppy2; - required_device<floppy_connector> m_floppy3; - required_ioport_array<8> m_io_keyboard; -// optional_device<ram_device> m_mainram; -}; - - -void max80_state::mem_map(address_map &map) -{ - map(0x0000, 0xffff).ram(); - map(0x0000, 0x01ff).rom(); - //map(0x3800, 0x3bff).r(FUNC(max80_state::keyboard_r)); - //map(0x3c00, 0x3fff).ram().share(m_p_videoram); - map(0x07d0, 0x07d3).w(m_brg, FUNC(com8116_device::str_w)); // W0 - map(0x07d4, 0x07d7).w(m_brg, FUNC(com8116_device::stt_w)); // W1 - map(0x07d8, 0x07db).w(FUNC(max80_state::drive_w)); // W2 - map(0x07dc, 0x07df).w(FUNC(max80_state::mode_w)); // 0x30 to move 4k area to 3000-3FFF //W3 - map(0x07e0, 0x07e0).mirror(2).w(m_crtc, FUNC(mc6845_device::address_w)); // OUT 0 - map(0x07e1, 0x07e1).mirror(2).w(m_crtc, FUNC(mc6845_device::register_w)); // OUT 0 - map(0x07e4, 0x07e7).rw(m_uart, FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)); // IN1,OUT1 - map(0x07ec, 0x07ef).rw(m_fdc, FUNC(mb8876_device::read), FUNC(mb8876_device::write)); // IN3,OUT3 - //map(0x07f0, 0x07f3).r // udata - map(0x07f4, 0x07f7).r(FUNC(max80_state::fdc_status_r)); - map(0x07f8, 0x07fb).portr("BOOT"); // IN6 - map(0x07f8, 0x07fb).w(FUNC(max80_state::beep_w)); - map(0x07fc, 0x07ff).rw(m_pio, FUNC(z80pio_device::read_alt), FUNC(z80pio_device::write_alt)); // IN7,OUT7 -} - -static INPUT_PORTS_START( max80 ) - PORT_START("LINE0") - PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("@") PORT_CODE(KEYCODE_INSERT) PORT_CHAR('@') - PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') - PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') - PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') - PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') - PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') - PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') - PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') - - PORT_START("LINE1") - PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') - PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') - PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') - PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') - PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') - PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') - PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') - PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') - - PORT_START("LINE2") - PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') - PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') - PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') - PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') - PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') - PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') - PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') - PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') - - PORT_START("LINE3") - PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') - PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') - PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') - PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("[") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{') - PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("\\") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|') - PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("]") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}') - PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("^") PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('~') - PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("_") PORT_CODE(KEYCODE_DEL) PORT_CHAR('_') PORT_CHAR(127) - - PORT_START("LINE4") - PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CODE(KEYCODE_0_PAD) PORT_CHAR('0') - PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_CHAR('1') PORT_CHAR('!') - PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_CHAR('2') PORT_CHAR('"') - PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_CHAR('3') PORT_CHAR('#') - PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_CHAR('4') PORT_CHAR('$') - PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_CHAR('5') PORT_CHAR('%') - PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_CHAR('6') PORT_CHAR('&') - PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD) PORT_CHAR('7') PORT_CHAR('\'') - - PORT_START("LINE5") - PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_8_PAD) PORT_CHAR('8') PORT_CHAR('(') - PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CODE(KEYCODE_9_PAD) PORT_CHAR('9') PORT_CHAR(')') - PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME(": *") PORT_CODE(KEYCODE_MINUS) PORT_CHAR(':') PORT_CHAR('*') - PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("; +") PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+') - PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME(", <") PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') - PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("- =") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('-') PORT_CHAR('=') - PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME(". >") PORT_CODE(KEYCODE_STOP) PORT_CODE(KEYCODE_DEL_PAD) PORT_CHAR('.') PORT_CHAR('>') - PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("/ ?") PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') - - PORT_START("LINE6") - PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(13) - PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Clear") PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(F8)) - PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Break") PORT_CODE(KEYCODE_END) PORT_CHAR(UCHAR_MAMEKEY(F9)) - PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) - PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("Down") PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) - PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) - PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("Right") PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) - PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') - - PORT_START("LINE7") - PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) - PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("F1") PORT_CODE(KEYCODE_F1) - PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("F2") PORT_CODE(KEYCODE_F2) - PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("F3") PORT_CODE(KEYCODE_F3) - PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("F4") PORT_CODE(KEYCODE_F4) - PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC) - PORT_BIT(0x40, 0x00, IPT_UNUSED) - PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("CTL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2) - - PORT_START("BOOT") // lower 3 dips decide the boot device. Other 5 dips are unknown. Manual shows them all set low. - PORT_DIPNAME( 0x07, 0x02, "Boot device") - PORT_DIPSETTING( 0x00, "None") - PORT_DIPSETTING( 0x01, "Floppy 5") - PORT_DIPSETTING( 0x02, "Floppy 8") - PORT_DIPSETTING( 0x03, "HD 5 UVC") - PORT_DIPSETTING( 0x04, "HD 8 UVC") - PORT_DIPSETTING( 0x05, "FD 5 UVC") - PORT_DIPSETTING( 0x06, "FD 8 UVC") - PORT_DIPSETTING( 0x07, "HD SASI") - PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNKNOWN ) - PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN ) - PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN ) - PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN ) - PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN ) -INPUT_PORTS_END - - -/************************************* - * - * Port handlers. - * - *************************************/ - - -TIMER_DEVICE_CALLBACK_MEMBER(max80_state::beep_timer) -{ - m_beep->set_state(0); -} - -void max80_state::drive_w(offs_t offset, u8 data) -{ - m_floppy = nullptr; - - if (BIT(data, 0)) m_floppy = m_floppy0->get_device(); - if (BIT(data, 1)) m_floppy = m_floppy1->get_device(); - if (BIT(data, 2)) m_floppy = m_floppy2->get_device(); - if (BIT(data, 3)) m_floppy = m_floppy3->get_device(); - - m_fdc->set_floppy(m_floppy); - - if (m_floppy) - { - m_floppy->mon_w(0); - m_floppy->ss_w(BIT(data, 4)); - } - - m_fdc->dden_w(!BIT(data, 6)); - m_fdc->set_unscaled_clock(BIT(data, 5) ? 2000000 : 1000000); - m_allow_nmi = BIT(data, 7); -} - - -WRITE_LINE_MEMBER(max80_state::intrq_w) -{ - m_fdc_int = state; -} - -WRITE_LINE_MEMBER(max80_state::drq_w) -{ - m_fdc_drq = state; - m_maincpu->set_input_line(INPUT_LINE_NMI, (state && m_allow_nmi) ? ASSERT_LINE : CLEAR_LINE); -} - -u8 max80_state::keyboard_r(offs_t offset) -{ - u8 i, result = 0; - - for (i = 0; i < 8; i++) - if (BIT(offset, i)) - result |= m_io_keyboard[i]->read(); - - return result; -} - -u8 max80_state::fdc_status_r(offs_t offset) -{ - u8 data = 0xfc | int(m_fdc_drq) | (m_fdc_int << 1); - return data; -} - -void max80_state::beep_w(offs_t offset, u8 data) -{ - m_beep->set_state(1); - m_beep_timer->adjust(attotime::from_msec(150)); -} - -void max80_state::mode_w(offs_t offset, u8 data) -{ - // bit 0, disable rom - // bit 1, disable i/o - // bit 2, enable video access from cpu - // bit 3, enable wide characters - // bits 4-7, move rom and i/o to the block starting with x000, where x = BIT(data,4,4) - m_mode = data; -} - -u8 max80_state::pio_pa_r(offs_t offset) -{ - return m_rtc->data_r(); -} - -void max80_state::pio_pa_w(offs_t offset, u8 data) -{ - m_rtc->data_w(data & 15); - // Memory banking of the 64k rams - // if subsequent memory address of >=0x8000, bits 6/7 are used, else bits 4/5. - // High bit switches 64k banks. Low bit does something with 32k, but not sure what. -} - -void max80_state::pio_pb_w(offs_t offset, u8 data) -{ - m_rtc->address_w(data & 15); - m_rtc->write_w(BIT(data, 4)); - m_rtc->read_w(BIT(data, 5)); - m_rtc->hold_w(BIT(data, 6)); -} - -/************************************* - * Machine * - *************************************/ - -void max80_state::machine_start() -{ -// save_item(NAME(m_irq)); -// save_item(NAME(m_size_store)); -// save_item(NAME(m_drq_off)); -// save_item(NAME(m_intrq_off)); - -} - -void max80_state::machine_reset() -{ - m_size_store = 0xff; - m_fdc_drq = false; - m_fdc_int = false; - m_floppy = nullptr; -} - -MC6845_UPDATE_ROW( max80_state::crtc_update_row ) -{ -#if 0 - rgb_t const *const palette = m_palette->palette()->entry_list_raw(); - u32 *p = &bitmap.pix(y); - - for (u16 x = 0; x < x_count; x++) - { - u16 mem = (ma + x) & 0x7ff; - u8 chr = m_vram[mem]; - u8 gfx = m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0xff : 0); - - /* Display a scanline of a character (8 pixels) */ - *p++ = palette[BIT(gfx, 7)]; - *p++ = palette[BIT(gfx, 6)]; - *p++ = palette[BIT(gfx, 5)]; - *p++ = palette[BIT(gfx, 4)]; - *p++ = palette[BIT(gfx, 3)]; - *p++ = palette[BIT(gfx, 2)]; - *p++ = palette[BIT(gfx, 1)]; - *p++ = palette[BIT(gfx, 0)]; - } -#endif -} - - -void max80_state::floppy_formats(format_registration &fr) -{ - fr.add(FLOPPY_IMD_FORMAT); - //fr.add(FLOPPY_JV3_FORMAT); - //fr.add(FLOPPY_DMK_FORMAT); - //fr.add(FLOPPY_JV1_FORMAT); -} - -static void max80_floppies(device_slot_interface &device) -{ - // Available images get rejected with 40-track drives - //device.option_add("40t_sd", FLOPPY_525_SSSD); - //device.option_add("40t_dd", FLOPPY_525_DD); - device.option_add("80t_qd", FLOPPY_525_QD); - device.option_add("8ssdd", FLOPPY_8_SSDD); - device.option_add("8dsdd", FLOPPY_8_DSDD); -} - - -void max80_state::max80(machine_config &config) -{ - /* basic machine hardware */ - Z80(config, m_maincpu, 15'200'000 / 3); - m_maincpu->set_addrmap(AS_PROGRAM, &max80_state::mem_map); - - /* video hardware */ - screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green())); - screen.set_refresh_hz(60); - screen.set_vblank_time(ATTOSECONDS_IN_USEC(2000)); // not accurate - screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update)); - screen.set_size(640, 480); - screen.set_visarea(0, 639, 0, 479); - - PALETTE(config, m_palette, palette_device::MONOCHROME); - - HD6845S(config, m_crtc, 15'200'000 / 8); // HD46505 - m_crtc->set_screen("screen"); - m_crtc->set_show_border_area(false); - m_crtc->set_char_width(8); - m_crtc->set_update_row_callback(FUNC(max80_state::crtc_update_row)); - - // devices - MB8876(config, m_fdc, 8_MHz_XTAL / 4); - m_fdc->intrq_wr_callback().set(FUNC(max80_state::intrq_w)); - m_fdc->drq_wr_callback().set(FUNC(max80_state::drq_w)); - FLOPPY_CONNECTOR(config, "fdc:0", max80_floppies, "8ssdd", max80_state::floppy_formats).enable_sound(true); - FLOPPY_CONNECTOR(config, "fdc:1", max80_floppies, nullptr, max80_state::floppy_formats).enable_sound(true); - FLOPPY_CONNECTOR(config, "fdc:2", max80_floppies, nullptr, max80_state::floppy_formats).enable_sound(true); - FLOPPY_CONNECTOR(config, "fdc:3", max80_floppies, nullptr, max80_state::floppy_formats).enable_sound(true); - - Z80PIO(config, m_pio, 15'200'000 / 3); - m_pio->in_pa_callback().set(FUNC(max80_state::pio_pa_r)); - m_pio->out_pa_callback().set(FUNC(max80_state::pio_pa_w)); - m_pio->out_pb_callback().set(FUNC(max80_state::pio_pb_w)); - - COM8116(config, m_brg, 5'068'800); // A few gates wired up as an oscillator. Frequency guessed. - m_brg->fr_handler().set(m_uart, FUNC(z80sio_device::rxca_w)); - m_brg->ft_handler().set(m_uart, FUNC(z80sio_device::rxcb_w)); - - MSM5832(config, m_rtc, 32.768_kHz_XTAL); - - Z80SIO(config, m_uart, 15'200'000 / 3); - - /* sound hardware */ - SPEAKER(config, "mono").front_center(); - BEEP(config, m_beep, 800).add_route(ALL_OUTPUTS, "mono", 0.50); - TIMER(config, m_beep_timer).configure_generic(FUNC(max80_state::beep_timer)); -} - - -/*************************************************************************** - - Game driver(s) - -***************************************************************************/ - - -ROM_START(max80) - ROM_REGION(0x0200, "maincpu",0) - ROM_LOAD("max80.e12", 0x0000, 0x0200, CRC(cf316f25) SHA1(78663711c6100a67ef18382284565feda2bbbf77) ) -ROM_END - -// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS -COMP( 1982, max80, 0, trs80l2, max80, max80, max80_state, empty_init, "Lobo Systems", "MAX-80", MACHINE_NOT_WORKING ) //| MACHINE_SUPPORTS_SAVE ) |