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mame/src/mess/drivers/apricot.c

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/***************************************************************************
ACT Apricot PC/Xi
- Needs Intel 8089 support (I/O processor)
- Dump of the keyboard MCU ROM needed (can be dumped using test mode)
***************************************************************************/
#include "emu.h"
#include "cpu/i86/i86.h"
#include "machine/ram.h"
#include "machine/pit8253.h"
#include "machine/i8255.h"
#include "machine/pic8259.h"
#include "machine/z80dart.h"
#include "machine/serial.h"
#include "machine/ctronics.h"
#include "machine/wd17xx.h"
#include "video/mc6845.h"
#include "sound/sn76496.h"
#include "imagedev/flopdrv.h"
#include "formats/apridisk.h"
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
class apricot_state : public driver_device
{
public:
apricot_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_ram(*this, RAM_TAG),
m_sn(*this, "ic7"),
m_crtc(*this, "ic30"),
m_ppi(*this, "ic17"),
m_pic(*this, "ic31"),
m_pit(*this, "ic16"),
m_sio(*this, "ic15"),
m_rs232(*this, "rs232"),
m_centronics(*this, "centronics"),
m_fdc(*this, "ic68"),
m_screen_buffer(*this, "screen_buffer"),
m_data_selector_dtr(1),
m_data_selector_rts(1),
m_video_mode(0),
m_display_on(1),
m_display_enabled(0)
{ }
required_device<cpu_device> m_maincpu;
required_device<ram_device> m_ram;
required_device<sn76489_device> m_sn;
required_device<mc6845_device> m_crtc;
required_device<i8255_device> m_ppi;
required_device<pic8259_device> m_pic;
required_device<pit8253_device> m_pit;
required_device<z80sio0_device> m_sio;
required_device<rs232_port_device> m_rs232;
required_device<centronics_device> m_centronics;
required_device<wd2793_device> m_fdc;
required_shared_ptr<UINT16> m_screen_buffer;
DECLARE_READ8_MEMBER( apricot_sysctrl_r );
DECLARE_WRITE8_MEMBER( apricot_sysctrl_w );
DECLARE_WRITE_LINE_MEMBER( timer_out1 );
DECLARE_WRITE_LINE_MEMBER( timer_out2 );
DECLARE_WRITE_LINE_MEMBER( apricot_wd2793_intrq_w );
DECLARE_WRITE_LINE_MEMBER( apricot_wd2793_drq_w );
DECLARE_WRITE_LINE_MEMBER( apricot_mc6845_de ) { m_display_enabled = state; };
DECLARE_WRITE_LINE_MEMBER( data_selector_dtr_w ) { m_data_selector_dtr = state; };
DECLARE_WRITE_LINE_MEMBER( data_selector_rts_w ) { m_data_selector_rts = state; };
virtual void machine_start();
IRQ_CALLBACK_MEMBER( irq_callback ) { return m_pic->inta_r(); }
int m_data_selector_dtr;
int m_data_selector_rts;
bool m_video_mode;
bool m_display_on;
int m_display_enabled;
UINT32 screen_update_apricot(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
};
/***************************************************************************
I/O
***************************************************************************/
READ8_MEMBER( apricot_state::apricot_sysctrl_r )
{
UINT8 data = 0;
data |= m_display_enabled << 3;
return data;
}
WRITE8_MEMBER( apricot_state::apricot_sysctrl_w )
{
m_display_on = BIT(data, 3);
m_video_mode = BIT(data, 4);
if (!BIT(data, 5)) wd17xx_set_drive(m_fdc, BIT(data, 6));
/* switch video modes */
m_crtc->set_clock( m_video_mode ? XTAL_15MHz / 10 : XTAL_15MHz / 16);
m_crtc->set_hpixels_per_column( m_video_mode ? 10 : 16);
}
static const i8255_interface apricot_i8255a_intf =
{
DEVCB_DEVICE_MEMBER("centronics", centronics_device, read),
DEVCB_DEVICE_MEMBER("centronics", centronics_device, write),
DEVCB_NULL,
DEVCB_DRIVER_MEMBER(apricot_state, apricot_sysctrl_w),
DEVCB_DRIVER_MEMBER(apricot_state, apricot_sysctrl_r),
DEVCB_NULL
};
WRITE_LINE_MEMBER( apricot_state::timer_out1 )
{
// receive clock via timer 1
if (m_data_selector_rts == 0 && m_data_selector_dtr == 0)
m_sio->rxca_w(state);
}
WRITE_LINE_MEMBER( apricot_state::timer_out2 )
{
// transmit clock via timer 2
if (m_data_selector_rts == 0 && m_data_selector_dtr == 0)
m_sio->txca_w(state);
// transmit and receive clock via timer 2
if (m_data_selector_rts == 1 && m_data_selector_dtr == 0)
{
m_sio->txca_w(state);
m_sio->rxca_w(state);
}
}
static const struct pit8253_interface apricot_pit8253_intf =
{
{
{ XTAL_4MHz / 16, DEVCB_LINE_VCC, DEVCB_DEVICE_LINE_MEMBER("ic31", pic8259_device, ir6_w) },
{ XTAL_4MHz / 2, DEVCB_LINE_VCC, DEVCB_DRIVER_LINE_MEMBER(apricot_state, timer_out1) },
{ XTAL_4MHz / 2, DEVCB_LINE_VCC, DEVCB_DRIVER_LINE_MEMBER(apricot_state, timer_out2) }
}
};
static Z80SIO_INTERFACE( apricot_z80sio_intf )
{
0, 0,
XTAL_4MHz / 16, XTAL_4MHz / 16,
// channel a
DEVCB_DEVICE_LINE_MEMBER("rs232", serial_port_device, rx),
DEVCB_DEVICE_LINE_MEMBER("rs232", serial_port_device, tx),
DEVCB_DEVICE_LINE_MEMBER("rs232", rs232_port_device, dtr_w),
DEVCB_DEVICE_LINE_MEMBER("rs232", rs232_port_device, rts_w),
DEVCB_NULL, // wait/ready: i8089 data request channel 2
DEVCB_NULL,
// channel b
DEVCB_NULL,
DEVCB_NULL,
DEVCB_DRIVER_LINE_MEMBER(apricot_state, data_selector_dtr_w),
DEVCB_DRIVER_LINE_MEMBER(apricot_state, data_selector_rts_w),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_DEVICE_LINE_MEMBER("ic31", pic8259_device, ir5_w),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL
};
// note: missing a receive clock callback to support external clock mode
// (m_data_selector_rts == 1 and m_data_selector_dtr == 0)
static const rs232_port_interface rs232_intf =
{
DEVCB_NULL,
DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, dcda_w),
DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, synca_w),
DEVCB_NULL,
DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, ctsa_w)
};
// note: fault output should be connected to syncb input of the sio
static const centronics_interface apricot_centronics_intf =
{
DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, ctsb_w),
DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, dcdb_w),
DEVCB_NULL
};
/***************************************************************************
FLOPPY
***************************************************************************/
WRITE_LINE_MEMBER( apricot_state::apricot_wd2793_intrq_w )
{
m_pic->ir4_w(state);
// i8089 external terminate channel 1
}
WRITE_LINE_MEMBER( apricot_state::apricot_wd2793_drq_w )
{
// i8089 data request channel 1
}
static const wd17xx_interface apricot_wd17xx_intf =
{
DEVCB_LINE_GND,
DEVCB_DRIVER_LINE_MEMBER(apricot_state, apricot_wd2793_intrq_w),
DEVCB_DRIVER_LINE_MEMBER(apricot_state, apricot_wd2793_drq_w),
{ FLOPPY_0, FLOPPY_1, NULL, NULL }
};
static LEGACY_FLOPPY_OPTIONS_START( apricot )
LEGACY_FLOPPY_OPTION
(
apridisk, "dsk", "ACT Apricot disk image", apridisk_identify, apridisk_construct, NULL,
HEADS(1-[2])
TRACKS(70/[80])
SECTORS([9]/18)
SECTOR_LENGTH([512])
FIRST_SECTOR_ID([1])
)
LEGACY_FLOPPY_OPTIONS_END
static const floppy_interface apricot_floppy_interface =
{
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
FLOPPY_STANDARD_3_5_DSDD,
LEGACY_FLOPPY_OPTIONS_NAME(apricot),
"floppy_3_5",
NULL
};
/***************************************************************************
VIDEO EMULATION
***************************************************************************/
UINT32 apricot_state::screen_update_apricot(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
if (!m_display_on)
m_crtc->screen_update(screen, bitmap, cliprect);
else
bitmap.fill(RGB_BLACK, cliprect);
return 0;
}
static MC6845_UPDATE_ROW( apricot_update_row )
{
apricot_state *state = device->machine().driver_data<apricot_state>();
UINT8 *ram = state->m_ram->pointer();
int i, x;
if (state->m_video_mode)
{
/* text mode */
for (i = 0; i < x_count; i++)
{
UINT16 code = state->m_screen_buffer[(ma + i) & 0x7ff];
UINT16 offset = ((code & 0x7ff) << 5) | (ra << 1);
UINT16 data = ram[offset + 1] << 8 | ram[offset];
int fill = 0;
if (BIT(code, 12) && BIT(data, 14)) fill = 1; /* strike-through? */
if (BIT(code, 13) && BIT(data, 15)) fill = 1; /* underline? */
/* draw 10 pixels of the character */
for (x = 0; x <= 10; x++)
{
int color = fill ? 1 : BIT(data, x);
if (BIT(code, 15)) color = !color; /* reverse? */
bitmap.pix32(y, x + i*10) = RGB_MONOCHROME_GREEN_HIGHLIGHT[color ? 1 + BIT(code, 14) : 0];
}
}
}
else
{
/* graphics mode */
fatalerror("Graphics mode not implemented!\n");
}
}
static MC6845_INTERFACE( apricot_mc6845_intf )
{
false,
10,
NULL,
apricot_update_row,
NULL,
DEVCB_DRIVER_LINE_MEMBER(apricot_state, apricot_mc6845_de),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
NULL
};
/***************************************************************************
MACHINE EMULATION
***************************************************************************/
void apricot_state::machine_start()
{
m_maincpu->space(AS_PROGRAM).install_ram(0x00000, m_ram->size() - 1, m_ram->pointer());
m_maincpu->set_irq_acknowledge_callback(device_irq_acknowledge_delegate(FUNC(apricot_state::irq_callback), this));
}
/***************************************************************************
ADDRESS MAPS
***************************************************************************/
static ADDRESS_MAP_START( apricot_mem, AS_PROGRAM, 16, apricot_state )
// AM_RANGE(0x00000, 0x3ffff) AM_RAMBANK("standard_ram")
// AM_RANGE(0x40000, 0xeffff) AM_RAMBANK("expansion_ram")
AM_RANGE(0xf0000, 0xf0fff) AM_MIRROR(0x7000) AM_RAM AM_SHARE("screen_buffer")
AM_RANGE(0xfc000, 0xfffff) AM_MIRROR(0x4000) AM_ROM AM_REGION("bootstrap", 0)
ADDRESS_MAP_END
static ADDRESS_MAP_START( apricot_io, AS_IO, 16, apricot_state )
AM_RANGE(0x00, 0x03) AM_DEVREADWRITE8("ic31", pic8259_device, read, write, 0x00ff)
AM_RANGE(0x40, 0x47) AM_DEVREADWRITE8_LEGACY("ic68", wd17xx_r, wd17xx_w, 0x00ff)
AM_RANGE(0x48, 0x4f) AM_DEVREADWRITE8("ic17", i8255_device, read, write, 0x00ff)
AM_RANGE(0x50, 0x51) AM_MIRROR(0x06) AM_DEVWRITE8("ic7", sn76489_device, write, 0x00ff)
AM_RANGE(0x58, 0x5f) AM_DEVREADWRITE8("ic16", pit8253_device, read, write, 0x00ff)
AM_RANGE(0x60, 0x67) AM_DEVREADWRITE8("ic15", z80sio0_device, ba_cd_r, ba_cd_w, 0x00ff)
AM_RANGE(0x68, 0x69) AM_MIRROR(0x04) AM_DEVWRITE8("ic30", mc6845_device, address_w, 0x00ff)
AM_RANGE(0x6a, 0x6b) AM_MIRROR(0x04) AM_DEVREADWRITE8("ic30", mc6845_device, register_r, register_w, 0x00ff)
// AM_RANGE(0x70, 0x71) AM_MIRROR(0x04) 8089 channel attention 1
// AM_RANGE(0x72, 0x73) AM_MIRROR(0x04) 8089 channel attention 2
AM_RANGE(0x78, 0x7f) AM_NOP /* unavailable */
ADDRESS_MAP_END
/***************************************************************************
MACHINE DRIVERS
***************************************************************************/
static const sn76496_config psg_intf =
{
DEVCB_NULL
};
static MACHINE_CONFIG_START( apricot, apricot_state )
MCFG_CPU_ADD("maincpu", I8086, XTAL_15MHz / 3)
MCFG_CPU_PROGRAM_MAP(apricot_mem)
MCFG_CPU_IO_MAP(apricot_io)
// MCFG_CPU_ADD("ic71", I8089, XTAL_15MHz / 3)
// video hardware
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_SIZE(800, 400)
MCFG_SCREEN_VISIBLE_AREA(0, 800-1, 0, 400-1)
MCFG_SCREEN_REFRESH_RATE(72)
MCFG_SCREEN_UPDATE_DRIVER(apricot_state, screen_update_apricot)
// sound hardware
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("ic7", SN76489, XTAL_4MHz / 2)
MCFG_SOUND_CONFIG(psg_intf)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
// internal ram
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("256k")
MCFG_RAM_EXTRA_OPTIONS("384k,512k") /* with 1 or 2 128k expansion boards */
// devices
MCFG_MC6845_ADD("ic30", MC6845, "screen", XTAL_15MHz / 10, apricot_mc6845_intf)
MCFG_I8255A_ADD("ic17", apricot_i8255a_intf)
MCFG_PIC8259_ADD("ic31", INPUTLINE("maincpu", 0), VCC, NULL)
MCFG_PIT8253_ADD("ic16", apricot_pit8253_intf)
MCFG_Z80SIO0_ADD("ic15", XTAL_15MHz / 6, apricot_z80sio_intf)
// rs232 port
MCFG_RS232_PORT_ADD("rs232", rs232_intf, default_rs232_devices, NULL)
// centronics printer
MCFG_CENTRONICS_PRINTER_ADD("centronics", apricot_centronics_intf)
// floppy
MCFG_WD2793_ADD("ic68", apricot_wd17xx_intf)
MCFG_LEGACY_FLOPPY_2_DRIVES_ADD(apricot_floppy_interface)
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( apricotxi, apricot )
MACHINE_CONFIG_END
/***************************************************************************
ROM DEFINITIONS
***************************************************************************/
ROM_START( apricot )
ROM_REGION(0x4000, "bootstrap", 0)
ROM_LOAD16_BYTE("pc_bios_lo_001.bin", 0x0000, 0x2000, CRC(0c217cc2) SHA1(0d7a2b61e17966462b555115f962a175fadcf72a))
ROM_LOAD16_BYTE("pc_bios_hi_001.bin", 0x0001, 0x2000, CRC(7c27f36c) SHA1(c801bbf904815f76ec6463e948f57e0118a26292))
ROM_END
ROM_START( apricotxi )
ROM_REGION(0x4000, "bootstrap", 0)
ROM_LOAD16_BYTE("lo_ve007.u11", 0x0000, 0x2000, CRC(e74e14d1) SHA1(569133b0266ce3563b21ae36fa5727308797deee)) /* LO Ve007 03.04.84 */
ROM_LOAD16_BYTE("hi_ve007.u9", 0x0001, 0x2000, CRC(b04fb83e) SHA1(cc2b2392f1b4c04bb6ec8ee26f8122242c02e572)) /* HI Ve007 03.04.84 */
ROM_END
/***************************************************************************
GAME DRIVERS
***************************************************************************/
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1983, apricot, 0, 0, apricot, 0, driver_device, 0, "ACT", "Apricot PC", GAME_NOT_WORKING )
COMP( 1984, apricotxi, apricot, 0, apricotxi, 0, driver_device, 0, "ACT", "Apricot Xi", GAME_NOT_WORKING )
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