mirror of
https://github.com/holub/mame
synced 2025-10-04 16:34:53 +03:00
362 lines
9.6 KiB
C
362 lines
9.6 KiB
C
/***************************************************************************
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Bashkiria-2M machine driver by Miodrag Milanovic
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28/03/2008 Preliminary driver.
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****************************************************************************/
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#include "emu.h"
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#include "cpu/i8085/i8085.h"
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#include "imagedev/cassette.h"
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#include "machine/i8255.h"
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#include "machine/pit8253.h"
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#include "machine/wd1772.h"
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#include "machine/pic8259.h"
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#include "machine/i8251.h"
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#include "includes/b2m.h"
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#include "machine/ram.h"
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#include "imagedev/flopdrv.h"
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READ8_MEMBER(b2m_state::b2m_keyboard_r)
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{
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UINT8 key = 0x00;
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if (offset < 0x100) {
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if ((offset & 0x01)!=0) { key |= ioport("LINE0")->read(); }
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if ((offset & 0x02)!=0) { key |= ioport("LINE1")->read(); }
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if ((offset & 0x04)!=0) { key |= ioport("LINE2")->read(); }
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if ((offset & 0x08)!=0) { key |= ioport("LINE3")->read(); }
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if ((offset & 0x10)!=0) { key |= ioport("LINE4")->read(); }
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if ((offset & 0x20)!=0) { key |= ioport("LINE5")->read(); }
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if ((offset & 0x40)!=0) { key |= ioport("LINE6")->read(); }
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if ((offset & 0x80)!=0) { key |= ioport("LINE7")->read(); }
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} else {
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if ((offset & 0x01)!=0) { key |= ioport("LINE8")->read(); }
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if ((offset & 0x02)!=0) { key |= ioport("LINE9")->read(); }
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if ((offset & 0x04)!=0) { key |= ioport("LINE10")->read(); }
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}
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return key;
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}
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static void b2m_set_bank(running_machine &machine,int bank)
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{
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UINT8 *rom;
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b2m_state *state = machine.driver_data<b2m_state>();
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address_space &space = machine.device("maincpu")->memory().space(AS_PROGRAM);
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UINT8 *ram = machine.device<ram_device>(RAM_TAG)->pointer();
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space.install_write_bank(0x0000, 0x27ff, "bank1");
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space.install_write_bank(0x2800, 0x2fff, "bank2");
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space.install_write_bank(0x3000, 0x6fff, "bank3");
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space.install_write_bank(0x7000, 0xdfff, "bank4");
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space.install_write_bank(0xe000, 0xffff, "bank5");
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rom = state->memregion("maincpu")->base();
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switch(bank) {
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case 0 :
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case 1 :
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space.unmap_write(0xe000, 0xffff);
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state->membank("bank1")->set_base(ram);
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state->membank("bank2")->set_base(ram + 0x2800);
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state->membank("bank3")->set_base(ram + 0x3000);
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state->membank("bank4")->set_base(ram + 0x7000);
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state->membank("bank5")->set_base(rom + 0x10000);
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break;
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#if 0
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case 1 :
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space.unmap_write(0x3000, 0x6fff);
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space.unmap_write(0xe000, 0xffff);
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state->membank("bank1")->set_base(ram);
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state->membank("bank2")->set_base(ram + 0x2800);
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state->membank("bank3")->set_base(rom + 0x12000);
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state->membank("bank4")->set_base(rom + 0x16000);
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state->membank("bank5")->set_base(rom + 0x10000);
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break;
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#endif
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case 2 :
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space.unmap_write(0x2800, 0x2fff);
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space.unmap_write(0xe000, 0xffff);
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state->membank("bank1")->set_base(ram);
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space.install_read_handler(0x2800, 0x2fff, read8_delegate(FUNC(b2m_state::b2m_keyboard_r),state));
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state->membank("bank3")->set_base(ram + 0x10000);
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state->membank("bank4")->set_base(ram + 0x7000);
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state->membank("bank5")->set_base(rom + 0x10000);
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break;
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case 3 :
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space.unmap_write(0x2800, 0x2fff);
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space.unmap_write(0xe000, 0xffff);
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state->membank("bank1")->set_base(ram);
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space.install_read_handler(0x2800, 0x2fff, read8_delegate(FUNC(b2m_state::b2m_keyboard_r),state));
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state->membank("bank3")->set_base(ram + 0x14000);
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state->membank("bank4")->set_base(ram + 0x7000);
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state->membank("bank5")->set_base(rom + 0x10000);
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break;
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case 4 :
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space.unmap_write(0x2800, 0x2fff);
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space.unmap_write(0xe000, 0xffff);
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state->membank("bank1")->set_base(ram);
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space.install_read_handler(0x2800, 0x2fff, read8_delegate(FUNC(b2m_state::b2m_keyboard_r),state));
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state->membank("bank3")->set_base(ram + 0x18000);
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state->membank("bank4")->set_base(ram + 0x7000);
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state->membank("bank5")->set_base(rom + 0x10000);
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break;
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case 5 :
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space.unmap_write(0x2800, 0x2fff);
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space.unmap_write(0xe000, 0xffff);
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state->membank("bank1")->set_base(ram);
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space.install_read_handler(0x2800, 0x2fff, read8_delegate(FUNC(b2m_state::b2m_keyboard_r),state));
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state->membank("bank3")->set_base(ram + 0x1c000);
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state->membank("bank4")->set_base(ram + 0x7000);
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state->membank("bank5")->set_base(rom + 0x10000);
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break;
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case 6 :
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state->membank("bank1")->set_base(ram);
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state->membank("bank2")->set_base(ram + 0x2800);
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state->membank("bank3")->set_base(ram + 0x3000);
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state->membank("bank4")->set_base(ram + 0x7000);
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state->membank("bank5")->set_base(ram + 0xe000);
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break;
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case 7 :
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space.unmap_write(0x0000, 0x27ff);
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space.unmap_write(0x2800, 0x2fff);
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space.unmap_write(0x3000, 0x6fff);
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space.unmap_write(0x7000, 0xdfff);
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space.unmap_write(0xe000, 0xffff);
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state->membank("bank1")->set_base(rom + 0x10000);
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state->membank("bank2")->set_base(rom + 0x10000);
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state->membank("bank3")->set_base(rom + 0x10000);
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state->membank("bank4")->set_base(rom + 0x10000);
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state->membank("bank5")->set_base(rom + 0x10000);
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break;
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}
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}
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WRITE_LINE_MEMBER(b2m_state::bm2_pit_out1)
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{
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speaker_level_w(m_speaker, state);
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}
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const struct pit8253_config b2m_pit8253_intf =
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{
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{
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{
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0,
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DEVCB_NULL,
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DEVCB_DEVICE_LINE("pic8259", pic8259_ir1_w)
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},
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{
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2000000,
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DEVCB_NULL,
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DEVCB_DRIVER_LINE_MEMBER(b2m_state,bm2_pit_out1)
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},
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{
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2000000,
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DEVCB_NULL,
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DEVCB_DEVICE_LINE("pit8253", pit8253_clk0_w)
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}
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}
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};
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WRITE8_MEMBER(b2m_state::b2m_8255_porta_w)
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{
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m_b2m_8255_porta = data;
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}
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WRITE8_MEMBER(b2m_state::b2m_8255_portb_w)
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{
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m_b2m_video_scroll = data;
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}
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WRITE8_MEMBER(b2m_state::b2m_8255_portc_w)
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{
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m_b2m_8255_portc = data;
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b2m_set_bank(machine(), m_b2m_8255_portc & 7);
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m_b2m_video_page = (m_b2m_8255_portc >> 7) & 1;
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}
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READ8_MEMBER(b2m_state::b2m_8255_portb_r)
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{
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return m_b2m_video_scroll;
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}
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I8255A_INTERFACE( b2m_ppi8255_interface_1 )
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{
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DEVCB_NULL,
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DEVCB_DRIVER_MEMBER(b2m_state,b2m_8255_porta_w),
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DEVCB_DRIVER_MEMBER(b2m_state,b2m_8255_portb_r),
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DEVCB_DRIVER_MEMBER(b2m_state,b2m_8255_portb_w),
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DEVCB_NULL,
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DEVCB_DRIVER_MEMBER(b2m_state,b2m_8255_portc_w)
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};
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WRITE8_MEMBER(b2m_state::b2m_ext_8255_portc_w)
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{
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UINT8 drive = ((data >> 1) & 1) ^ 1;
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UINT8 side = (data & 1) ^ 1;
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static const char *names[] = { "fd0", "fd1"};
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floppy_image_device *floppy = NULL;
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floppy_connector *con = machine().device<floppy_connector>(names[drive]);
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if(con)
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floppy = con->get_device();
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floppy->mon_w(0);
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m_fdc->set_floppy(floppy);
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if (m_b2m_drive!=drive) {
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m_b2m_drive = drive;
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}
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floppy->ss_w(side);
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if (m_b2m_side!=side) {
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m_b2m_side = side;
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}
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}
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I8255A_INTERFACE( b2m_ppi8255_interface_2 )
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{
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_DRIVER_MEMBER(b2m_state,b2m_ext_8255_portc_w)
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};
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READ8_MEMBER(b2m_state::b2m_romdisk_porta_r)
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{
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UINT8 *romdisk = memregion("maincpu")->base() + 0x12000;
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return romdisk[m_b2m_romdisk_msb*256+m_b2m_romdisk_lsb];
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}
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WRITE8_MEMBER(b2m_state::b2m_romdisk_portb_w)
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{
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m_b2m_romdisk_lsb = data;
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}
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WRITE8_MEMBER(b2m_state::b2m_romdisk_portc_w)
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{
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m_b2m_romdisk_msb = data & 0x7f;
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}
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I8255A_INTERFACE( b2m_ppi8255_interface_3 )
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{
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DEVCB_DRIVER_MEMBER(b2m_state,b2m_romdisk_porta_r),
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_DRIVER_MEMBER(b2m_state,b2m_romdisk_portb_w),
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DEVCB_NULL,
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DEVCB_DRIVER_MEMBER(b2m_state,b2m_romdisk_portc_w)
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};
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WRITE_LINE_MEMBER(b2m_state::b2m_pic_set_int_line)
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{
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machine().device("maincpu")->execute().set_input_line(0, state ? HOLD_LINE : CLEAR_LINE);
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}
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/* Driver initialization */
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DRIVER_INIT_MEMBER(b2m_state,b2m)
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{
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m_vblank_state = 0;
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}
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WRITE8_MEMBER(b2m_state::b2m_palette_w)
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{
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UINT8 b = (3 - ((data >> 6) & 3)) * 0x55;
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UINT8 g = (3 - ((data >> 4) & 3)) * 0x55;
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UINT8 r = (3 - ((data >> 2) & 3)) * 0x55;
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UINT8 bw = (3 - (data & 3)) * 0x55;
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m_b2m_color[offset & 3] = data;
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if (ioport("MONITOR")->read()==1) {
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palette_set_color_rgb(machine(),offset, r, g, b);
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} else {
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palette_set_color_rgb(machine(),offset, bw, bw, bw);
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}
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}
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READ8_MEMBER(b2m_state::b2m_palette_r)
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{
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return m_b2m_color[offset];
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}
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WRITE8_MEMBER(b2m_state::b2m_localmachine_w)
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{
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m_b2m_localmachine = data;
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}
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READ8_MEMBER(b2m_state::b2m_localmachine_r)
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{
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return m_b2m_localmachine;
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}
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static void b2m_postload(b2m_state *state)
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{
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b2m_set_bank(state->machine(), state->m_b2m_8255_portc & 7);
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}
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void b2m_state::machine_start()
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{
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m_pic = machine().device("pic8259");
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m_fdc = machine().device<wd1773_t>("wd1793");
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m_speaker = machine().device(SPEAKER_TAG);
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/* register for state saving */
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save_item(NAME(m_b2m_8255_porta));
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save_item(NAME(m_b2m_video_scroll));
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save_item(NAME(m_b2m_8255_portc));
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save_item(NAME(m_b2m_video_page));
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save_item(NAME(m_b2m_drive));
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save_item(NAME(m_b2m_side));
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save_item(NAME(m_b2m_romdisk_lsb));
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save_item(NAME(m_b2m_romdisk_msb));
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save_pointer(NAME(m_b2m_color), 4);
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save_item(NAME(m_b2m_localmachine));
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save_item(NAME(m_vblank_state));
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machine().save().register_postload(save_prepost_delegate(FUNC(b2m_postload), this));
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}
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static IRQ_CALLBACK(b2m_irq_callback)
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{
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b2m_state *state = device->machine().driver_data<b2m_state>();
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return pic8259_acknowledge(state->m_pic);
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}
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const struct pic8259_interface b2m_pic8259_config =
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{
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DEVCB_DRIVER_LINE_MEMBER(b2m_state,b2m_pic_set_int_line),
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DEVCB_LINE_VCC,
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DEVCB_NULL
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};
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INTERRUPT_GEN_MEMBER(b2m_state::b2m_vblank_interrupt)
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{
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m_vblank_state++;
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if (m_vblank_state>1) m_vblank_state=0;
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pic8259_ir0_w(m_pic, m_vblank_state);
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}
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void b2m_state::machine_reset()
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{
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m_b2m_side = 0;
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m_b2m_drive = 0;
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machine().device("maincpu")->execute().set_irq_acknowledge_callback(b2m_irq_callback);
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b2m_set_bank(machine(), 7);
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}
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