// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/***************************************************************************
Osborne Executive driver file
***************************************************************************/
#include "emu.h"
#include "bus/rs232/rs232.h"
#include "cpu/z80/z80.h"
#include "imagedev/floppy.h"
#include "machine/z80daisy.h"
#include "machine/6821pia.h"
#include "machine/input_merger.h"
#include "machine/pit8253.h"
#include "machine/ram.h"
#include "machine/ripple_counter.h"
#include "machine/wd_fdc.h"
#include "machine/z80sio.h"
#include "sound/spkrdev.h"
#include "emupal.h"
#include "screen.h"
#include "softlist.h"
#include "speaker.h"
#define MAIN_CLOCK XTAL(23'961'600)
#define MODEM_PORT_TAG "modem"
#define PRINTER_PORT_TAG "printer"
class osbexec_state : public driver_device
{
public:
osbexec_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_screen(*this, "screen")
, m_mb8877(*this, "mb8877")
, m_messram( *this, RAM_TAG)
, m_pia(*this, "pia_%u", 0U)
, m_rtc(*this, "rtc")
, m_sio(*this, "sio")
, m_speaker(*this, "speaker")
, m_floppy(*this, "mb8877:%u:525ssdd", 0U)
, m_kbd_row(*this, "ROW%u", 0U)
{ }
void osbexec(machine_config &config);
void init_osbexec();
private:
required_device<z80_device> m_maincpu;
required_device<screen_device> m_screen;
required_device<mb8877_device> m_mb8877;
required_device<ram_device> m_messram;
required_device_array<pia6821_device, 2> m_pia;
required_device<ripple_counter_device> m_rtc;
required_device<z80sio_device> m_sio;
required_device<speaker_sound_device> m_speaker;
required_device_array<floppy_image_device, 2> m_floppy;
required_ioport_array<8> m_kbd_row;
virtual void video_start() override;
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
bitmap_ind16 m_bitmap;
std::unique_ptr<uint8_t[]> m_fontram;
std::unique_ptr<uint8_t[]> m_vram;
uint8_t *m_ram_0000;
uint8_t *m_ram_c000;
uint8_t m_temp_attr;
emu_timer *m_video_timer;
/* PIA 0 (UD12) */
uint8_t m_pia0_porta;
uint8_t m_pia0_portb;
int m_pia0_cb2; /* 60/50 */
/* PIA 1 (UD8) */
void set_banks()
{
uint8_t *ram_ptr = m_messram->pointer();
m_ram_0000 = ram_ptr;
if ( m_pia0_porta & 0x01 )
m_ram_0000 += 0x10000;
membank( "0000" )->set_base( m_ram_0000 + 0x0000 );
membank( "2000" )->set_base( m_ram_0000 + 0x2000 );
membank( "4000" )->set_base( m_ram_0000 + 0x4000 );
m_ram_c000 = m_ram_0000 + 0xc000;
membank( "e000" )->set_base( m_ram_0000 + 0xe000 );
if ( m_pia0_porta & 0x80 )
{
membank( "0000" )->set_base( memregion("maincpu")->base());
/* When BIOS is enabled 2000-3FFF is set to the "ROM RAM" */
membank( "2000" )->set_base( ram_ptr + 0x20000 );
}
if ( m_pia0_porta & 0x40 )
m_ram_c000 = m_vram.get();
}
DECLARE_WRITE8_MEMBER(osbexec_0000_w);
DECLARE_READ8_MEMBER(osbexec_c000_r);
DECLARE_WRITE8_MEMBER(osbexec_c000_w);
DECLARE_READ8_MEMBER(osbexec_kbd_r);
DECLARE_READ8_MEMBER(osbexec_rtc_r);
virtual void machine_reset() override;
TIMER_CALLBACK_MEMBER(osbexec_video_callback);
DECLARE_READ8_MEMBER(osbexec_pia0_a_r);
DECLARE_WRITE8_MEMBER(osbexec_pia0_a_w);
DECLARE_READ8_MEMBER(osbexec_pia0_b_r);
DECLARE_WRITE8_MEMBER(osbexec_pia0_b_w);
DECLARE_WRITE_LINE_MEMBER(osbexec_pia0_ca2_w);
DECLARE_WRITE_LINE_MEMBER(osbexec_pia0_cb2_w);
DECLARE_WRITE_LINE_MEMBER(modem_txclk_w);
DECLARE_WRITE_LINE_MEMBER(modem_rxclk_w);
DECLARE_WRITE_LINE_MEMBER(modem_dsr_w);
DECLARE_WRITE_LINE_MEMBER(modem_ri_w);
DECLARE_WRITE_LINE_MEMBER(comm_clk_a_w);
void osbexec_io(address_map &map);
void osbexec_mem(address_map &map);
};
WRITE8_MEMBER(osbexec_state::osbexec_0000_w)
{
/* Font RAM writing is enabled when ROM bank is enabled */
if ( m_pia0_porta & 0x80 )
{
if ( offset < 0x1000 )
m_fontram[ offset ] = data;
}
else
{
m_ram_0000[ offset ] = data;
}
}
READ8_MEMBER(osbexec_state::osbexec_c000_r)
{
uint8_t data = m_ram_c000[offset];
if ( ( m_pia0_porta & 0x40 ) && offset < 0x1000 )
{
m_temp_attr = m_ram_c000[ 0x1000 + offset ];
}
return data;
}
WRITE8_MEMBER(osbexec_state::osbexec_c000_w)
{
m_ram_c000[offset] = data;
if ( ( m_pia0_porta & 0x40 ) && offset < 0x1000 )
{
m_ram_c000[ 0x1000 + offset ] = m_temp_attr;
}
}
READ8_MEMBER(osbexec_state::osbexec_kbd_r)
{
uint8_t data = 0xFF;
for (int j = 0; j < 8; j++)
if (BIT(offset, j + 8))
data &= m_kbd_row[j]->read();
return data;
}
READ8_MEMBER(osbexec_state::osbexec_rtc_r)
{
// 74LS244 buffer @ UF13
return m_rtc->count();
}
void osbexec_state::osbexec_mem(address_map &map)
{
map(0x0000, 0x1FFF).bankr("0000").w(FUNC(osbexec_state::osbexec_0000_w)); /* ROM and maybe also banked ram */
map(0x2000, 0x3FFF).bankrw("2000"); /* Banked RAM */
map(0x4000, 0xBFFF).bankrw("4000"); /* Banked RAM */
map(0xC000, 0xDFFF).rw(FUNC(osbexec_state::osbexec_c000_r), FUNC(osbexec_state::osbexec_c000_w)); /* Video ram / Banked RAM */
map(0xE000, 0xEFFF).bankrw("e000"); /* Banked RAM */
map(0xF000, 0xFFFF).ram(); /* 4KB of non-banked RAM for system stack etc */
}
void osbexec_state::osbexec_io(address_map &map)
{
map.unmap_value_high();
map(0x00, 0x03).mirror(0xff00).rw(m_pia[0], FUNC(pia6821_device::read), FUNC(pia6821_device::write)); /* 6821 PIA @ UD12 */
map(0x04, 0x07).mirror(0xff00).rw("ctc", FUNC(pit8253_device::read), FUNC(pit8253_device::write)); /* 8253 @UD1 */
map(0x08, 0x0B).mirror(0xff00).rw(m_mb8877, FUNC(wd_fdc_device_base::read), FUNC(wd_fdc_device_base::write)); /* MB8877 @ UB17 input clock = 1MHz */
map(0x0C, 0x0F).mirror(0xff00).rw(m_sio, FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)); /* SIO @ UD4 */
map(0x10, 0x13).mirror(0xff00).rw(m_pia[1], FUNC(pia6821_device::read), FUNC(pia6821_device::write)); /* 6821 PIA @ UD8 */
map(0x14, 0x17).select(0xff00).r(FUNC(osbexec_state::osbexec_kbd_r)); /* KBD */
map(0x18, 0x1b).mirror(0xff00).r(FUNC(osbexec_state::osbexec_rtc_r)); /* "RTC" @ UE13/UF13 */
/* ?? - vid ? */
}
static INPUT_PORTS_START( osbexec )
PORT_START("ROW0")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH2) PORT_CHAR('[') PORT_CHAR(']')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('\'') PORT_CHAR('"')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t')
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
PORT_START("ROW1")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
PORT_START("ROW2")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
PORT_START("ROW3")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
PORT_START("ROW4")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
PORT_START("ROW5")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
PORT_START("ROW6")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('\\') PORT_CHAR('|')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
PORT_START("ROW7")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_DIPNAME( 0x08, 0, "Alpha Lock" ) PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED)
INPUT_PORTS_END
void osbexec_state::video_start()
{
m_screen->register_screen_bitmap(m_bitmap);
}
uint32_t osbexec_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
copybitmap(bitmap, m_bitmap, 0, 0, 0, 0, cliprect);
return 0;
}
/*
UD12 - 6821 PIA
Port A:
PA7 - ROM BANK ENA
PA6 - VRAM BANK ENA
PA5 - BANK6ENA
PA4 - BANK5ENA
PA3 - BANK4ENA
PA2 - BANK3ENA
PA1 - BANK2ENA
PA0 - BANK1ENA
CA1 - DMA IRQ
CA2 - KBD STB (i/o)
Port B:
PB7 - MODEM RI (input)
PB6 - MODEM DSR (input)
PB5 - TXC SEL
PB4 - RXC SEL
PB3 - speaker
PB2 - DSEL2
PB1 - DSEL1
PB0 - DDEN
CB1 - VBlank (input)
CB2 - 60/50 (?)
*/
READ8_MEMBER(osbexec_state::osbexec_pia0_a_r)
{
return m_pia0_porta;
}
WRITE8_MEMBER(osbexec_state::osbexec_pia0_a_w)
{
//logerror("osbexec_pia0_a_w: %02x\n", data );
m_pia0_porta = data;
set_banks();
}
READ8_MEMBER(osbexec_state::osbexec_pia0_b_r)
{
return m_pia0_portb;
}
WRITE8_MEMBER(osbexec_state::osbexec_pia0_b_w)
{
m_pia0_portb = (m_pia0_portb & 0xc0) | (data & 0x3f);
m_speaker->level_w(!BIT(data, 3));
switch ( data & 0x06 )
{
case 0x02:
m_mb8877->set_floppy(m_floppy[1].target());
m_floppy[1]->mon_w(0);
break;
case 0x04:
m_mb8877->set_floppy(m_floppy[0].target());
m_floppy[0]->mon_w(0);
break;
default:
m_mb8877->set_floppy(nullptr);
break;
}
m_mb8877->dden_w(( data & 0x01 ) ? 1 : 0 );
}
WRITE_LINE_MEMBER(osbexec_state::osbexec_pia0_ca2_w)
{
logerror("osbexec_pia0_ca2_w: state = %d\n", state);
}
WRITE_LINE_MEMBER(osbexec_state::osbexec_pia0_cb2_w)
{
m_pia0_cb2 = state;
}
WRITE_LINE_MEMBER(osbexec_state::modem_txclk_w)
{
if (BIT(m_pia0_portb, 5))
m_sio->txca_w(state);
}
WRITE_LINE_MEMBER(osbexec_state::modem_rxclk_w)
{
if (BIT(m_pia0_portb, 4))
m_sio->rxca_w(state);
}
WRITE_LINE_MEMBER(osbexec_state::modem_dsr_w)
{
if (state)
m_pia0_portb |= 0x40;
else
m_pia0_portb &= 0xbf;
}
WRITE_LINE_MEMBER(osbexec_state::modem_ri_w)
{
if (state)
m_pia0_portb |= 0x80;
else
m_pia0_portb &= 0x7f;
}
WRITE_LINE_MEMBER(osbexec_state::comm_clk_a_w)
{
if (!BIT(m_pia0_portb, 5))
m_sio->txca_w(state);
if (!BIT(m_pia0_portb, 4))
m_sio->rxca_w(state);
}
/*
* The Osborne Executive supports the following disc formats: (TODO: Verify)
* - Osborne single density: 40 tracks, 10 sectors per track, 256-byte sectors (100 KByte)
* - Osborne double density: 40 tracks, 5 sectors per track, 1024-byte sectors (200 KByte)
* - IBM Personal Computer: 40 tracks, 8 sectors per track, 512-byte sectors (160 KByte)
* - Xerox 820 Computer: 40 tracks, 18 sectors per track, 128-byte sectors (90 KByte)
* - DEC 1820 double density: 40 tracks, 9 sectors per track, 512-byte sectors (180 KByte)
*
*/
static void osborne2_floppies(device_slot_interface &device)
{
device.option_add("525ssdd", FLOPPY_525_SSDD);
}
TIMER_CALLBACK_MEMBER(osbexec_state::osbexec_video_callback)
{
int y = m_screen->vpos();
if ( y < 240 )
{
uint16_t row_addr = ( y / 10 ) * 128;
uint16_t *p = &m_bitmap.pix16(y);
uint8_t char_line = y % 10;
for ( int x = 0; x < 80; x++ )
{
uint8_t ch = m_vram[ row_addr + x ];
uint8_t attr = m_vram[ 0x1000 + row_addr + x ];
uint8_t fg_col = ( attr & 0x80 ) ? 2 : 1;
uint8_t font_bits = m_fontram[ ( ( attr & 0x10 ) ? 0x800 : 0 ) + ( ch & 0x7f ) * 16 + char_line ];
/* Check for underline */
if (BIT(attr, 6) && char_line == 9)
font_bits = 0xFF;
/* Check for blink */
if (BIT(attr, 5) && BIT(m_rtc->count(), 4))
font_bits = 0;
/* Check for inverse video */
if (BIT(ch, 7) && !BIT(attr, 4))
font_bits ^= 0xFF;
for ( int b = 0; b < 8; b++ )
{
p[ x * 8 + b ] = ( font_bits & 0x80 ) ? fg_col : 0;
font_bits <<= 1;
}
}
}
m_video_timer->adjust( m_screen->time_until_pos( y + 1, 0 ) );
}
void osbexec_state::init_osbexec()
{
m_vram = make_unique_clear<uint8_t[]>(0x2000);
m_fontram = make_unique_clear<uint8_t[]>(0x1000);
m_video_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(osbexec_state::osbexec_video_callback),this));
}
void osbexec_state::machine_reset()
{
m_pia0_porta = 0xC0; /* Enable ROM and VRAM on reset */
set_banks();
m_video_timer->adjust( m_screen->time_until_pos( 0, 0 ) );
// D0 cleared on interrupt acknowledge cycle by TTL gates at UC21 and UA18
m_maincpu->set_input_line_vector(0, 0xfe); // Z80
}
static const z80_daisy_config osbexec_daisy_config[] =
{
{ "sio" },
{ nullptr }
};
void osbexec_state::osbexec(machine_config &config)
{
Z80(config, m_maincpu, MAIN_CLOCK/6);
m_maincpu->set_addrmap(AS_PROGRAM, &osbexec_state::osbexec_mem);
m_maincpu->set_addrmap(AS_IO, &osbexec_state::osbexec_io);
m_maincpu->set_daisy_config(osbexec_daisy_config);
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
m_screen->set_color(rgb_t::green());
m_screen->set_screen_update(FUNC(osbexec_state::screen_update));
m_screen->set_raw(MAIN_CLOCK/2, 768, 0, 640, 260, 0, 240); // May not be correct
m_screen->set_palette("palette");
m_screen->screen_vblank().set(m_pia[0], FUNC(pia6821_device::cb1_w));
m_screen->screen_vblank().append(m_rtc, FUNC(ripple_counter_device::clock_w)).invert();
PALETTE(config, "palette", palette_device::MONOCHROME_HIGHLIGHT);
SPEAKER(config, "mono").front_center();
SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 1.00);
PIA6821(config, m_pia[0], 0);
m_pia[0]->readpa_handler().set(FUNC(osbexec_state::osbexec_pia0_a_r));
m_pia[0]->readpb_handler().set(FUNC(osbexec_state::osbexec_pia0_b_r));
m_pia[0]->writepa_handler().set(FUNC(osbexec_state::osbexec_pia0_a_w));
m_pia[0]->writepb_handler().set(FUNC(osbexec_state::osbexec_pia0_b_w));
m_pia[0]->ca2_handler().set(FUNC(osbexec_state::osbexec_pia0_ca2_w));
m_pia[0]->cb2_handler().set(FUNC(osbexec_state::osbexec_pia0_cb2_w));
m_pia[0]->irqa_handler().set("mainirq", FUNC(input_merger_device::in_w<0>));
m_pia[0]->irqb_handler().set("mainirq", FUNC(input_merger_device::in_w<1>));
PIA6821(config, m_pia[1], 0);
m_pia[1]->irqa_handler().set("mainirq", FUNC(input_merger_device::in_w<2>));
m_pia[1]->irqb_handler().set("mainirq", FUNC(input_merger_device::in_w<3>));
INPUT_MERGER_ANY_HIGH(config, "mainirq").output_handler().set_inputline(m_maincpu, 0);
RIPPLE_COUNTER(config, m_rtc); // 74LS393 @ UE13
m_rtc->set_stages(8); // two halves cascaded
Z80SIO(config, m_sio, MAIN_CLOCK/6);
m_sio->out_txda_callback().set(MODEM_PORT_TAG, FUNC(rs232_port_device::write_txd));
m_sio->out_dtra_callback().set(MODEM_PORT_TAG, FUNC(rs232_port_device::write_dtr));
m_sio->out_rtsa_callback().set(MODEM_PORT_TAG, FUNC(rs232_port_device::write_rts));
m_sio->out_txdb_callback().set(PRINTER_PORT_TAG, FUNC(rs232_port_device::write_txd));
m_sio->out_dtrb_callback().set(PRINTER_PORT_TAG, FUNC(rs232_port_device::write_dtr));
m_sio->out_rtsb_callback().set(PRINTER_PORT_TAG, FUNC(rs232_port_device::write_rts));
m_sio->out_int_callback().set("mainirq", FUNC(input_merger_device::in_w<4>));
pit8253_device &ctc(PIT8253(config, "ctc", 0));
ctc.set_clk<0>(MAIN_CLOCK / 13); // divided by 74S161 @ UC25
ctc.set_clk<1>(MAIN_CLOCK / 13); // divided by 74S161 @ UC25
ctc.set_clk<2>(MAIN_CLOCK / 12);
ctc.out_handler<0>().set(FUNC(osbexec_state::comm_clk_a_w));
ctc.out_handler<0>().append(MODEM_PORT_TAG, FUNC(rs232_port_device::write_etc));
ctc.out_handler<1>().set(m_sio, FUNC(z80sio_device::rxtxcb_w));
//ctc.out_handler<2>().set(FUNC(osbexec_state::spindle_clk_w));
rs232_port_device &modem_port(RS232_PORT(config, MODEM_PORT_TAG, default_rs232_devices, nullptr));
modem_port.rxd_handler().set(m_sio, FUNC(z80sio_device::rxa_w));
modem_port.dcd_handler().set(m_sio, FUNC(z80sio_device::dcda_w));
modem_port.dsr_handler().set(FUNC(osbexec_state::modem_dsr_w));
modem_port.ri_handler().set(FUNC(osbexec_state::modem_ri_w));
modem_port.cts_handler().set(m_sio, FUNC(z80sio_device::ctsa_w));
modem_port.txc_handler().set(FUNC(osbexec_state::modem_txclk_w));
modem_port.rxc_handler().set(FUNC(osbexec_state::modem_rxclk_w));
rs232_port_device &printer_port(RS232_PORT(config, PRINTER_PORT_TAG, default_rs232_devices, nullptr));
printer_port.rxd_handler().set(m_sio, FUNC(z80sio_device::rxb_w));
printer_port.dcd_handler().set(m_sio, FUNC(z80sio_device::dcdb_w));
printer_port.cts_handler().set(m_sio, FUNC(z80sio_device::ctsb_w));
MB8877(config, m_mb8877, MAIN_CLOCK/24);
m_mb8877->intrq_wr_callback().set(m_pia[1], FUNC(pia6821_device::cb1_w));
FLOPPY_CONNECTOR(config, "mb8877:0", osborne2_floppies, "525ssdd", floppy_image_device::default_floppy_formats);
FLOPPY_CONNECTOR(config, "mb8877:1", osborne2_floppies, "525ssdd", floppy_image_device::default_floppy_formats);
/* internal ram */
RAM(config, RAM_TAG).set_default_size("136K"); /* 128KB Main RAM + RAM in ROM bank (8) */
/* software lists */
SOFTWARE_LIST(config, "flop_list").set_original("osborne2");
}
ROM_START( osbexec )
ROM_REGION(0x2000, "maincpu", 0)
ROM_LOAD( "execv12.ud18", 0x0000, 0x2000, CRC(70798c2f) SHA1(2145a72da563bed1d6d455c77e48cc011a5f1153) ) /* Checksum C6B2 */
ROM_END
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1982, osbexec, 0, 0, osbexec, osbexec, osbexec_state, init_osbexec, "Osborne", "Executive", MACHINE_NOT_WORKING )