693 lines
22 KiB
C
693 lines
22 KiB
C
/***************************************************************************
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drivers/bw2.c
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Bondwell BW 2
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- Z80L CPU 4MHz
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- 64KB RAM, expandable to 224KB RAM.
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- 4KB System ROM
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- MSM6255 LCD controller, 640x200 pixels
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- 16KB Video RAM
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- TMS2797 FDC controller
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- 8251 USART serial interface
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- 8253 PIT timer
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- 8255 PPI
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http://www.thebattles.net/bondwell/
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http://www.vintage-computer.com/bondwell2.shtml
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http://www2.okisemi.com/site/productscatalog/displaydrivers/availabledocuments/Intro-7090.html
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***************************************************************************/
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#include "includes/bw2.h"
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//**************************************************************************
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// MACROS / CONSTANTS
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//**************************************************************************
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enum
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{
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RAM1 = 0,
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VRAM,
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RAM2,
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RAM3,
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RAM4,
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RAM5,
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RAM6,
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ROM
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};
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//**************************************************************************
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// ADDRESS DECODING
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//**************************************************************************
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//-------------------------------------------------
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// read -
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//-------------------------------------------------
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READ8_MEMBER( bw2_state::read )
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{
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int rom = 1, vram = 1, ram1 = 1, ram2 = 1, ram3 = 1, ram4 = 1, ram5 = 1, ram6 = 1;
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UINT8 data = 0xff;
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switch (m_bank)
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{
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case RAM1: ram1 = 0; break;
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case VRAM: vram = 0; break;
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case RAM2: ram2 = 0; break;
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case RAM3: ram3 = 0; break;
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case RAM4: ram4 = 0; break;
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case RAM5: ram5 = 0; break;
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case RAM6: ram6 = 0; break;
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case ROM: rom = 0; break;
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}
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if (!rom)
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{
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data = memregion(Z80_TAG)->base()[offset & 0x3fff];
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}
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if (!vram)
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{
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data = m_video_ram[offset & 0x3fff];
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}
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if (!ram1)
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{
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data = m_ram->pointer()[offset];
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}
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if (!ram2 && (m_ram->size() >= 96 * 1024))
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{
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data = m_ram->pointer()[0x10000 | offset];
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}
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if (!ram3 && (m_ram->size() >= 128 * 1024))
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{
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data = m_ram->pointer()[0x18000 | offset];
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}
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if (!ram4 && (m_ram->size() >= 160 * 1024))
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{
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data = m_ram->pointer()[0x20000 | offset];
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}
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if (!ram5 && (m_ram->size() >= 192 * 1024))
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{
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data = m_ram->pointer()[0x28000 | offset];
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}
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if (!ram6 && (m_ram->size() >= 224 * 1024))
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{
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data = m_ram->pointer()[0x30000 | offset];
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}
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return m_exp->cd_r(space, offset, data, ram2, ram3, ram4, ram5, ram6);
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}
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//-------------------------------------------------
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// write -
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//-------------------------------------------------
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WRITE8_MEMBER( bw2_state::write )
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{
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int vram = 1, ram1 = 1, ram2 = 1, ram3 = 1, ram4 = 1, ram5 = 1, ram6 = 1;
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switch (m_bank)
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{
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case RAM1: ram1 = 0; break;
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case VRAM: vram = 0; break;
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case RAM2: ram2 = 0; break;
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case RAM3: ram3 = 0; break;
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case RAM4: ram4 = 0; break;
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case RAM5: ram5 = 0; break;
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case RAM6: ram6 = 0; break;
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}
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if (!vram)
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{
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m_video_ram[offset & 0x3fff] = data;
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}
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if (!ram1)
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{
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m_ram->pointer()[offset] = data;
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}
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if (!ram2 && (m_ram->size() >= 96 * 1024))
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{
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m_ram->pointer()[0x10000 | offset] = data;
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}
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if (!ram3 && (m_ram->size() >= 128 * 1024))
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{
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m_ram->pointer()[0x18000 | offset] = data;
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}
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if (!ram4 && (m_ram->size() >= 160 * 1024))
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{
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m_ram->pointer()[0x20000 | offset] = data;
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}
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if (!ram5 && (m_ram->size() >= 192 * 1024))
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{
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m_ram->pointer()[0x28000 | offset] = data;
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}
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if (!ram6 && (m_ram->size() >= 224 * 1024))
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{
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m_ram->pointer()[0x30000 | offset] = data;
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}
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m_exp->cd_w(space, offset, data, ram2, ram3, ram4, ram5, ram6);
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}
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//**************************************************************************
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// ADDRESS MAPS
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//**************************************************************************
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//-------------------------------------------------
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// ADDRESS_MAP( bw2_mem )
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//-------------------------------------------------
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static ADDRESS_MAP_START( bw2_mem, AS_PROGRAM, 8, bw2_state )
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE(0x0000, 0x7fff) AM_READWRITE(read, write)
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AM_RANGE(0x8000, 0xffff) AM_RAM
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ADDRESS_MAP_END
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//-------------------------------------------------
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// ADDRESS_MAP( bw2_io )
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//-------------------------------------------------
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static ADDRESS_MAP_START( bw2_io, AS_IO, 8, bw2_state )
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ADDRESS_MAP_UNMAP_HIGH
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ADDRESS_MAP_GLOBAL_MASK(0xff)
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AM_RANGE(0x00, 0x03) AM_DEVREADWRITE(I8255A_TAG, i8255_device, read, write)
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AM_RANGE(0x10, 0x13) AM_DEVREADWRITE_LEGACY(I8253_TAG, pit8253_r, pit8253_w)
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AM_RANGE(0x20, 0x21) AM_DEVREADWRITE(MSM6255_TAG, msm6255_device, read, write)
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AM_RANGE(0x30, 0x3f) AM_DEVREADWRITE(BW2_EXPANSION_SLOT_TAG, bw2_expansion_slot_device, slot_r, slot_w)
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AM_RANGE(0x40, 0x40) AM_DEVREADWRITE(I8251_TAG, i8251_device, data_r, data_w)
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AM_RANGE(0x41, 0x41) AM_DEVREADWRITE(I8251_TAG, i8251_device, status_r, control_w)
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AM_RANGE(0x50, 0x50) AM_DEVWRITE(CENTRONICS_TAG, centronics_device, write)
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AM_RANGE(0x60, 0x63) AM_DEVREADWRITE(WD2797_TAG, wd2797_t, read, write)
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AM_RANGE(0x70, 0x7f) AM_DEVREADWRITE(BW2_EXPANSION_SLOT_TAG, bw2_expansion_slot_device, modsel_r, modsel_w)
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ADDRESS_MAP_END
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//**************************************************************************
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// INPUT PORTS
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//**************************************************************************
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//-------------------------------------------------
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// INPUT_PORTS( bw2 )
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//-------------------------------------------------
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/*
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Keyboard matrix
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X0 X1 X2 X3 X4 X5 X6 X7
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y9 |CAPS | | | | | | | |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y8 |SHIFT| |SPACE| Z | A | Q | 2 " | F1 |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y7 |CTRL | - = | \ | | X | S | W | 3 # | F2 |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y6 | @ ` | P | UP | C | D | E | 4 $ | F3 |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y5 | 1 ! | | | V | F | R | 5 % | F4 |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y4 | ESC | | | B | G | T | 6 & | F5 |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y3 | TAB | : * |ENTER| N | H | Y | 7 ' | F6 |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y2 |DOWN | ^ ~ | [ { | M | J | U | 8 ( | F7 |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y1 |RIGHT| ; + | ] } | , < | K | I | 9 ) | F8 |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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Y0 |LEFT | BS | / ? | . > | L | O | 0 _ | DEL |
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+-----+-----+-----+-----+-----+-----+-----+-----+
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*/
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static INPUT_PORTS_START( bw2 )
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PORT_START("Y0")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('_')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DEL) PORT_CHAR(UCHAR_MAMEKEY(DEL))
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PORT_START("Y1")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F8) PORT_CHAR(UCHAR_MAMEKEY(F8))
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PORT_START("Y2")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('~')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F7) PORT_CHAR(UCHAR_MAMEKEY(F7))
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PORT_START("Y3")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR(UCHAR_MAMEKEY(TAB))
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(':') PORT_CHAR('*')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F6) PORT_CHAR(UCHAR_MAMEKEY(F6))
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PORT_START("Y4")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC) PORT_CHAR(27)
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F5) PORT_CHAR(UCHAR_MAMEKEY(F5))
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PORT_START("Y5")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F4) PORT_CHAR(UCHAR_MAMEKEY(F4))
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PORT_START("Y6")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('@') PORT_CHAR('`')
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F3) PORT_CHAR(UCHAR_MAMEKEY(F3))
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PORT_START("Y7")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL))
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F2) PORT_CHAR(UCHAR_MAMEKEY(F2))
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PORT_START("Y8")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F1) PORT_CHAR(UCHAR_MAMEKEY(F1))
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PORT_START("Y9")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_START("BAUD")
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PORT_CONFNAME( 0x05, 0x05, "Baud rate")
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PORT_CONFSETTING( 0x00, "9600 baud" )
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PORT_CONFSETTING( 0x01, "4800 baud" )
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PORT_CONFSETTING( 0x02, "2400 baud" )
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PORT_CONFSETTING( 0x03, "1200 baud" )
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PORT_CONFSETTING( 0x04, "600 baud" )
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PORT_CONFSETTING( 0x05, "300 baud" )
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INPUT_PORTS_END
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//**************************************************************************
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// DEVICE CONFIGURATION
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//**************************************************************************
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//-------------------------------------------------
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// I8255A_INTERFACE( ppi_intf )
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//-------------------------------------------------
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WRITE8_MEMBER( bw2_state::ppi_pa_w )
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{
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/*
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PA0 KB0 Keyboard line select 0
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PA1 KB1 Keyboard line select 1
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PA2 KB2 Keyboard line select 2
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PA3 KB3 Keyboard line select 3
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PA4 /DS0 Drive select 0
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PA5 /DS1 Drive select 1
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PA6 Select RS232 connector
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PA7 /STROBE to centronics printer
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*/
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// keyboard
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m_kb = data & 0x0f;
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// drive select
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m_floppy = NULL;
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if (BIT(data, 4)) m_floppy = m_floppy0->get_device();
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if (BIT(data, 5)) m_floppy = m_floppy1->get_device();
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m_fdc->set_floppy(m_floppy);
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if (m_floppy) m_floppy->mon_w(m_mtron);
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// centronics strobe
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m_centronics->strobe_w(BIT(data, 7));
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}
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READ8_MEMBER( bw2_state::ppi_pb_r )
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{
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/*
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PB0 Keyboard column status of selected line
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PB1 Keyboard column status of selected line
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PB2 Keyboard column status of selected line
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PB3 Keyboard column status of selected line
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PB4 Keyboard column status of selected line
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PB5 Keyboard column status of selected line
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PB6 Keyboard column status of selected line
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PB7 Keyboard column status of selected line
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*/
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static const char *const rownames[] = { "Y0", "Y1", "Y2", "Y3", "Y4", "Y5", "Y6", "Y7", "Y8", "Y9" };
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UINT8 data = 0xff;
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if (m_kb <= 9)
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{
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data = ioport(rownames[m_kb])->read();
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}
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return data;
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}
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WRITE8_MEMBER( bw2_state::ppi_pc_w )
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{
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/*
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PC0 Memory bank select
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PC1 Memory bank select
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PC2 Memory bank select
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PC3 Not connected
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*/
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m_bank = data & 0x07;
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}
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READ8_MEMBER( bw2_state::ppi_pc_r )
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{
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/*
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PC4 BUSY from centronics printer
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PC5 M/FDBK motor feedback
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PC6 RLSD Carrier detect from RS232
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PC7 /PROT Write protected disk
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*/
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UINT8 data = 0;
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// centronics busy
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data |= m_centronics->busy_r() << 4;
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// floppy motor
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data |= m_mfdbk << 5;
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// write protect
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if (m_floppy) data |= m_floppy->wpt_r() << 7;
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return data;
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}
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static I8255A_INTERFACE( ppi_intf )
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{
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DEVCB_NULL,
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DEVCB_DRIVER_MEMBER(bw2_state, ppi_pa_w),
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DEVCB_DRIVER_MEMBER(bw2_state, ppi_pb_r),
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DEVCB_NULL,
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DEVCB_DRIVER_MEMBER(bw2_state, ppi_pc_r),
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DEVCB_DRIVER_MEMBER(bw2_state, ppi_pc_w),
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};
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//-------------------------------------------------
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// pit8253_config pit_intf
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//-------------------------------------------------
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WRITE_LINE_MEMBER( bw2_state::pit_out0_w )
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{
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m_uart->transmit_clock();
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m_uart->receive_clock();
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}
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WRITE_LINE_MEMBER( bw2_state::mtron_w )
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{
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m_mtron = state;
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m_mfdbk = !state;
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if (m_floppy) m_floppy->mon_w(m_mtron);
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}
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static const struct pit8253_config pit_intf =
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{
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{
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{
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XTAL_16MHz/4, // 8251 USART TXC, RXC
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DEVCB_LINE_VCC,
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DEVCB_DRIVER_LINE_MEMBER(bw2_state, pit_out0_w)
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},
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{
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11000, // LCD controller
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DEVCB_LINE_VCC,
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DEVCB_DEVICE_LINE(I8253_TAG, pit8253_clk2_w)
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},
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{
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0, // Floppy /MTRON
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DEVCB_LINE_VCC,
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DEVCB_DRIVER_LINE_MEMBER(bw2_state, mtron_w)
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}
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}
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};
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//-------------------------------------------------
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// MSM6255_INTERFACE( lcdc_intf )
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//-------------------------------------------------
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void bw2_state::palette_init()
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{
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palette_set_color_rgb(machine(), 0, 0xa5, 0xad, 0xa5);
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palette_set_color_rgb(machine(), 1, 0x31, 0x39, 0x10);
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}
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static MSM6255_CHAR_RAM_READ( bw2_charram_r )
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{
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bw2_state *state = device->machine().driver_data<bw2_state>();
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return state->m_video_ram[ma & 0x3fff];
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}
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static MSM6255_INTERFACE( lcdc_intf )
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{
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SCREEN_TAG,
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0,
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bw2_charram_r,
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};
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//-------------------------------------------------
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// floppy_format_type floppy_formats
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//-------------------------------------------------
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void bw2_state::fdc_intrq_w(bool state)
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{
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logerror("intrq %u\n", state?1:0);
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m_maincpu->set_input_line(INPUT_LINE_IRQ0, state ? ASSERT_LINE : CLEAR_LINE);
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}
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void bw2_state::fdc_drq_w(bool state)
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{
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logerror("drq %u\n", state?1:0);
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if (state)
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{
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if (m_maincpu->state_int(Z80_HALT))
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{
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m_maincpu->set_input_line(INPUT_LINE_NMI, HOLD_LINE);
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}
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}
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else
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{
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m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
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}
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}
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const floppy_format_type bw2_state::floppy_formats[] = {
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FLOPPY_BW2_FORMAT,
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FLOPPY_IMD_FORMAT,
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FLOPPY_MFM_FORMAT,
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FLOPPY_MFI_FORMAT,
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NULL
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};
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static SLOT_INTERFACE_START( bw2_floppies )
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SLOT_INTERFACE( "35dd", FLOPPY_35_DD ) // Teac FD-35
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SLOT_INTERFACE_END
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//-------------------------------------------------
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// rs232_port_interface rs232_intf
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//-------------------------------------------------
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static SLOT_INTERFACE_START( rs232_devices )
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SLOT_INTERFACE_END
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static const rs232_port_interface rs232_intf =
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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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};
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//**************************************************************************
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// MACHINE INITIALIZATION
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//**************************************************************************
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//-------------------------------------------------
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// MACHINE_START( bw2 )
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//-------------------------------------------------
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void bw2_state::machine_start()
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{
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// allocate memory
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m_video_ram.allocate(0x4000);
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// floppy callbacks
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m_fdc->setup_intrq_cb(wd2797_t::line_cb(FUNC(bw2_state::fdc_intrq_w), this));
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m_fdc->setup_drq_cb(wd2797_t::line_cb(FUNC(bw2_state::fdc_drq_w), this));
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// register for state saving
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save_item(NAME(m_kb));
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save_item(NAME(m_bank));
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save_item(NAME(m_mtron));
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save_item(NAME(m_mfdbk));
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}
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//**************************************************************************
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// MACHINE DRIVERS
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//**************************************************************************
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//-------------------------------------------------
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// MACHINE_CONFIG( bw2 )
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//-------------------------------------------------
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static MACHINE_CONFIG_START( bw2, bw2_state )
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// basic machine hardware
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MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_16MHz/4)
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MCFG_CPU_PROGRAM_MAP(bw2_mem)
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MCFG_CPU_IO_MAP(bw2_io)
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// video hardware
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MCFG_DEFAULT_LAYOUT(layout_lcd)
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MCFG_SCREEN_ADD(SCREEN_TAG, LCD)
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MCFG_SCREEN_REFRESH_RATE(60)
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MCFG_SCREEN_UPDATE_DEVICE( MSM6255_TAG, msm6255_device, screen_update )
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MCFG_SCREEN_SIZE(640, 200)
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MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 200-1)
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MCFG_PALETTE_LENGTH(2)
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// devices
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MCFG_PIT8253_ADD(I8253_TAG, pit_intf)
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MCFG_I8255A_ADD(I8255A_TAG, ppi_intf)
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MCFG_MSM6255_ADD(MSM6255_TAG, XTAL_16MHz, lcdc_intf)
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MCFG_CENTRONICS_PRINTER_ADD(CENTRONICS_TAG, standard_centronics)
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MCFG_I8251_ADD(I8251_TAG, default_i8251_interface)
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MCFG_WD2797x_ADD(WD2797_TAG, XTAL_16MHz/16)
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MCFG_FLOPPY_DRIVE_ADD(WD2797_TAG":0", bw2_floppies, "35dd", NULL, bw2_state::floppy_formats)
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MCFG_FLOPPY_DRIVE_ADD(WD2797_TAG":1", bw2_floppies, NULL, NULL, bw2_state::floppy_formats)
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MCFG_BW2_EXPANSION_SLOT_ADD(BW2_EXPANSION_SLOT_TAG, XTAL_16MHz, bw2_expansion_cards, NULL, NULL)
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MCFG_RS232_PORT_ADD(RS232_TAG, rs232_intf, rs232_devices, NULL, NULL)
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// software list
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MCFG_SOFTWARE_LIST_ADD("flop_list","bw2")
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// internal ram
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MCFG_RAM_ADD(RAM_TAG)
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MCFG_RAM_DEFAULT_SIZE("64K")
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MCFG_RAM_EXTRA_OPTIONS("96K,128K,160K,192K,224K")
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MACHINE_CONFIG_END
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//**************************************************************************
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// ROMS
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//**************************************************************************
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//-------------------------------------------------
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// ROM( bw2 )
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//-------------------------------------------------
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ROM_START( bw2 )
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ROM_REGION( 0x1000, Z80_TAG, 0 )
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ROM_DEFAULT_BIOS( "v20" )
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ROM_SYSTEM_BIOS( 0, "v12", "BW 2 v1.2" )
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ROMX_LOAD( "bw2-12.ic8", 0x0000, 0x1000, CRC(0ab42d10) SHA1(430b232631eee9b715151b8d191b7eb9449ac513), ROM_BIOS(1) )
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ROM_SYSTEM_BIOS( 1, "v20", "BW 2 v2.0" )
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ROMX_LOAD( "bw2-20.ic8", 0x0000, 0x1000, CRC(86f36471) SHA1(a3e2ba4edd50ff8424bb0675bdbb3b9f13c04c9d), ROM_BIOS(2) )
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ROM_END
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//**************************************************************************
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// SYSTEM DRIVERS
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//**************************************************************************
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// YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS
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COMP( 1985, bw2, 0, 0, bw2, bw2, driver_device, 0, "Bondwell Holding", "Bondwell Model 2", GAME_NO_SOUND_HW )
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