/***************************************************************************
ACT Apricot PC/Xi
license: MAME, GPL-2.0+
copyright-holders: Dirk Best
- Error 29 (timer failed)
- Dump of the keyboard MCU ROM needed (can be dumped using test mode)
***************************************************************************/
#include "bus/centronics/ctronics.h"
#include "bus/rs232/rs232.h"
#include "cpu/i86/i86.h"
#include "cpu/i8089/i8089.h"
#include "machine/ram.h"
#include "machine/pit8253.h"
#include "machine/i8255.h"
#include "machine/pic8259.h"
#include "machine/z80dart.h"
#include "machine/wd_fdc.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_cpu(*this, "ic91"),
m_ram(*this, RAM_TAG),
m_iop(*this, "ic71"),
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_floppy0(*this, "ic68:0"),
m_floppy1(*this, "ic68:1"),
m_palette(*this, "palette"),
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_cpu;
required_device<ram_device> m_ram;
required_device<i8089_device> m_iop;
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_t> m_fdc;
required_device<floppy_connector> m_floppy0;
required_device<floppy_connector> m_floppy1;
required_device<palette_device> m_palette;
required_shared_ptr<UINT16> m_screen_buffer;
DECLARE_WRITE8_MEMBER( i8089_ca1_w );
DECLARE_WRITE8_MEMBER( i8089_ca2_w );
DECLARE_WRITE8_MEMBER( i8255_portb_w );
DECLARE_READ8_MEMBER( i8255_portc_r );
DECLARE_WRITE8_MEMBER( i8255_portc_w );
DECLARE_WRITE_LINE_MEMBER( timer_out1 );
DECLARE_WRITE_LINE_MEMBER( timer_out2 );
DECLARE_WRITE_LINE_MEMBER( wd2793_intrq_w );
DECLARE_WRITE_LINE_MEMBER( write_centronics_fault );
DECLARE_WRITE_LINE_MEMBER( write_centronics_perror );
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; };
MC6845_UPDATE_ROW( crtc_update_row );
virtual void machine_start();
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);
int m_centronics_fault;
int m_centronics_perror;
};
//**************************************************************************
// I/O
//**************************************************************************
WRITE8_MEMBER( apricot_state::i8089_ca1_w )
{
m_iop->sel_w(0);
m_iop->ca_w(1);
m_iop->ca_w(0);
}
WRITE8_MEMBER( apricot_state::i8089_ca2_w )
{
m_iop->sel_w(1);
m_iop->ca_w(1);
m_iop->ca_w(0);
}
WRITE_LINE_MEMBER( apricot_state::write_centronics_fault )
{
m_centronics_fault = state;
m_sio->syncb_w(state);
m_ppi->pc2_w(state);
}
WRITE_LINE_MEMBER( apricot_state::write_centronics_perror )
{
m_centronics_perror = state;
}
READ8_MEMBER( apricot_state::i8255_portc_r )
{
UINT8 data = 0;
data |= m_centronics_perror << 0;
// schematic page 294 says pc1 is centronics pin 34, which is n/c.
data |= m_centronics_fault << 2;
data |= m_display_enabled << 3;
return data;
}
WRITE8_MEMBER( apricot_state::i8255_portb_w )
{
m_display_on = BIT(data, 3);
m_video_mode = BIT(data, 4);
if (!BIT(data, 5))
m_fdc->set_floppy(BIT(data, 6) ? m_floppy1->get_device() : m_floppy0->get_device());
// 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);
// PB7 Centronics transceiver direction. 0 = output, 1 = input
}
WRITE8_MEMBER( apricot_state::i8255_portc_w )
{
// schematic page 294 says pc4 outputs to centronics pin 13, which is the "select" output from the printer.
m_centronics->write_strobe(BIT(data, 5));
// schematic page 294 says pc6 outputs to centronics pin 15, which is unused
}
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);
}
}
//**************************************************************************
// FLOPPY
//**************************************************************************
WRITE_LINE_MEMBER( apricot_state::wd2793_intrq_w )
{
m_pic->ir4_w(state);
m_iop->ext1_w(state);
}
static SLOT_INTERFACE_START( apricot_floppies )
SLOT_INTERFACE( "d31v", SONY_OA_D31V )
SLOT_INTERFACE( "d32w", SONY_OA_D32W )
SLOT_INTERFACE_END
//**************************************************************************
// 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_t::black, cliprect);
return 0;
}
MC6845_UPDATE_ROW( apricot_state::crtc_update_row )
{
UINT8 *ram = m_ram->pointer();
const pen_t *pen = m_palette->pens();
int i, x;
if (m_video_mode)
{
// text mode
for (i = 0; i < x_count; i++)
{
UINT16 code = 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) = pen[color ? 1 + BIT(code, 14) : 0];
}
}
}
else
{
// graphics mode
fatalerror("Graphics mode not implemented!\n");
}
}
//**************************************************************************
// MACHINE EMULATION
//**************************************************************************
void apricot_state::machine_start()
{
// install shared memory to the main cpu and the iop
m_cpu->space(AS_PROGRAM).install_ram(0x00000, m_ram->size() - 1, m_ram->pointer());
m_iop->space(AS_PROGRAM).install_ram(0x00000, m_ram->size() - 1, m_ram->pointer());
// motor on is connected to gnd
m_floppy0->get_device()->mon_w(0);
m_floppy1->get_device()->mon_w(0);
}
//**************************************************************************
// 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("ic68", wd2793_t, read, write, 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) AM_WRITE8(i8089_ca1_w, 0x00ff)
AM_RANGE(0x72, 0x73) AM_MIRROR(0x04) AM_WRITE8(i8089_ca2_w, 0x00ff)
AM_RANGE(0x78, 0x7f) AM_NOP // unavailable
ADDRESS_MAP_END
//**************************************************************************
// MACHINE DRIVERS
//**************************************************************************
static MACHINE_CONFIG_START( apricot, apricot_state )
// main cpu
MCFG_CPU_ADD("ic91", I8086, XTAL_15MHz / 3)
MCFG_CPU_PROGRAM_MAP(apricot_mem)
MCFG_CPU_IO_MAP(apricot_io)
MCFG_CPU_IRQ_ACKNOWLEDGE_DEVICE("ic31", pic8259_device, inta_cb)
// i/o cpu
MCFG_CPU_ADD("ic71", I8089, XTAL_15MHz / 3)
MCFG_CPU_PROGRAM_MAP(apricot_mem)
MCFG_CPU_IO_MAP(apricot_io)
MCFG_I8089_DATABUS_WIDTH(16)
MCFG_I8089_SINTR1(DEVWRITELINE("ic31", pic8259_device, ir0_w))
MCFG_I8089_SINTR2(DEVWRITELINE("ic31", pic8259_device, ir1_w))
// 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)
MCFG_PALETTE_ADD_MONOCHROME_GREEN_HIGHLIGHT("palette")
MCFG_MC6845_ADD("ic30", MC6845, "screen", XTAL_15MHz / 10)
MCFG_MC6845_SHOW_BORDER_AREA(false)
MCFG_MC6845_CHAR_WIDTH(10)
MCFG_MC6845_UPDATE_ROW_CB(apricot_state, crtc_update_row)
MCFG_MC6845_OUT_DE_CB(WRITELINE(apricot_state, apricot_mc6845_de))
// sound hardware
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("ic7", SN76489, XTAL_4MHz / 2)
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_DEVICE_ADD("ic17", I8255A, 0)
MCFG_I8255_IN_PORTA_CB(DEVREAD8("cent_data_in", input_buffer_device, read))
MCFG_I8255_OUT_PORTA_CB(DEVWRITE8("cent_data_out", output_latch_device, write))
MCFG_I8255_OUT_PORTB_CB(WRITE8(apricot_state, i8255_portb_w))
MCFG_I8255_IN_PORTC_CB(READ8(apricot_state, i8255_portc_r))
MCFG_I8255_OUT_PORTC_CB(WRITE8(apricot_state, i8255_portc_w))
MCFG_PIC8259_ADD("ic31", INPUTLINE("ic91", 0), VCC, NULL)
MCFG_DEVICE_ADD("ic16", PIT8253, 0)
MCFG_PIT8253_CLK0(XTAL_4MHz / 16)
MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE("ic31", pic8259_device, ir6_w))
MCFG_PIT8253_CLK1(XTAL_4MHz / 2)
MCFG_PIT8253_OUT1_HANDLER(WRITELINE(apricot_state, timer_out1))
MCFG_PIT8253_CLK2(XTAL_4MHz / 2)
MCFG_PIT8253_OUT2_HANDLER(WRITELINE(apricot_state, timer_out2))
MCFG_Z80SIO0_ADD("ic15", XTAL_15MHz / 6, 0, 0, XTAL_4MHz / 16, XTAL_4MHz / 16)
MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE("rs232", rs232_port_device, write_txd))
MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE("rs232", rs232_port_device, write_dtr))
MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE("rs232", rs232_port_device, write_rts))
MCFG_Z80DART_OUT_WRDYA_CB(DEVWRITELINE("ic71", i8089_device, drq2_w))
MCFG_Z80DART_OUT_DTRB_CB(WRITELINE(apricot_state, data_selector_dtr_w))
MCFG_Z80DART_OUT_RTSB_CB(WRITELINE(apricot_state, data_selector_rts_w))
MCFG_Z80DART_OUT_INT_CB(DEVWRITELINE("ic31", pic8259_device, ir5_w))
// rs232 port
MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, NULL)
// note: missing a receive clock callback to support external clock mode
// (m_data_selector_rts == 1 and m_data_selector_dtr == 0)
MCFG_RS232_RXD_HANDLER(DEVWRITELINE("ic15", z80dart_device, rxa_w))
MCFG_RS232_DCD_HANDLER(DEVWRITELINE("ic15", z80dart_device, dcda_w))
MCFG_RS232_DSR_HANDLER(DEVWRITELINE("ic15", z80dart_device, synca_w))
MCFG_RS232_CTS_HANDLER(DEVWRITELINE("ic15", z80dart_device, ctsa_w))
// centronics printer
MCFG_CENTRONICS_ADD("centronics", centronics_printers, "printer")
MCFG_CENTRONICS_DATA_INPUT_BUFFER("cent_data_in")
MCFG_CENTRONICS_ACK_HANDLER(DEVWRITELINE("ic15", z80dart_device, ctsb_w))
MCFG_CENTRONICS_BUSY_HANDLER(DEVWRITELINE("ic15", z80dart_device, dcdb_w))
MCFG_CENTRONICS_FAULT_HANDLER(WRITELINE(apricot_state, write_centronics_fault))
MCFG_CENTRONICS_PERROR_HANDLER(WRITELINE(apricot_state, write_centronics_perror))
//MCFG_CENTRONICS_SELECT_HANDLER() // schematic page 294 says this is connected to pc4, but that is an output to the printer
MCFG_DEVICE_ADD("cent_data_in", INPUT_BUFFER, 0)
MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", "centronics")
// floppy
MCFG_WD2793x_ADD("ic68", XTAL_4MHz / 2)
MCFG_WD_FDC_INTRQ_CALLBACK(WRITELINE(apricot_state, wd2793_intrq_w))
MCFG_WD_FDC_DRQ_CALLBACK(DEVWRITELINE("ic71", i8089_device, drq1_w))
MCFG_FLOPPY_DRIVE_ADD("ic68:0", apricot_floppies, "d32w", floppy_image_device::default_floppy_formats)
MCFG_FLOPPY_DRIVE_ADD("ic68:1", apricot_floppies, "d32w", floppy_image_device::default_floppy_formats)
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 )