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https://github.com/holub/mame
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apricot.c: connect rs232 and centronics interfaces
This commit is contained in:
Dirk Best
parent
3294dc000e
commit
f7654641d7
@ -9,14 +9,16 @@
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#include "emu.h"
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#include "cpu/i86/i86.h"
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#include "machine/ram.h"
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#include "machine/pit8253.h"
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#include "machine/i8255.h"
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#include "machine/pic8259.h"
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#include "machine/z80dart.h"
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#include "machine/serial.h"
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#include "machine/ctronics.h"
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#include "machine/wd17xx.h"
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#include "sound/sn76496.h"
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#include "video/mc6845.h"
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#include "machine/ram.h"
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#include "sound/sn76496.h"
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#include "imagedev/flopdrv.h"
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#include "formats/apridisk.h"
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@ -37,9 +39,13 @@ public:
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m_ppi(*this, "ic17"),
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m_pic(*this, "ic31"),
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m_pit(*this, "ic16"),
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m_z80sio(*this, "ic15"),
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m_sio(*this, "ic15"),
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m_rs232(*this, "rs232"),
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m_centronics(*this, "centronics"),
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m_fdc(*this, "ic68"),
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m_screen_buffer(*this, "screen_buffer"),
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m_data_selector_dtr(1),
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m_data_selector_rts(1),
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m_video_mode(0),
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m_display_on(1),
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m_display_enabled(0)
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@ -52,23 +58,31 @@ public:
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required_device<i8255_device> m_ppi;
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required_device<pic8259_device> m_pic;
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required_device<pit8253_device> m_pit;
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required_device<z80sio0_device> m_z80sio;
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required_device<z80sio0_device> m_sio;
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required_device<rs232_port_device> m_rs232;
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required_device<centronics_device> m_centronics;
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required_device<wd2793_device> m_fdc;
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required_shared_ptr<UINT16> m_screen_buffer;
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DECLARE_READ8_MEMBER(apricot_sysctrl_r);
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DECLARE_WRITE8_MEMBER(apricot_sysctrl_w);
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DECLARE_WRITE_LINE_MEMBER(apricot_pit8253_out1);
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DECLARE_WRITE_LINE_MEMBER(apricot_pit8253_out2);
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DECLARE_WRITE_LINE_MEMBER(apricot_wd2793_intrq_w);
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DECLARE_WRITE_LINE_MEMBER(apricot_wd2793_drq_w);
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DECLARE_WRITE_LINE_MEMBER(apricot_mc6845_de) { m_display_enabled = state; };
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DECLARE_READ8_MEMBER( apricot_sysctrl_r );
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DECLARE_WRITE8_MEMBER( apricot_sysctrl_w );
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DECLARE_WRITE_LINE_MEMBER( timer_out1 );
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DECLARE_WRITE_LINE_MEMBER( timer_out2 );
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DECLARE_WRITE_LINE_MEMBER( apricot_wd2793_intrq_w );
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DECLARE_WRITE_LINE_MEMBER( apricot_wd2793_drq_w );
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DECLARE_WRITE_LINE_MEMBER( apricot_mc6845_de ) { m_display_enabled = state; };
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DECLARE_WRITE_LINE_MEMBER( data_selector_dtr_w ) { m_data_selector_dtr = state; };
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DECLARE_WRITE_LINE_MEMBER( data_selector_rts_w ) { m_data_selector_rts = state; };
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virtual void machine_start();
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IRQ_CALLBACK_MEMBER( irq_callback ) { return m_pic->inta_r(); }
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int m_data_selector_dtr;
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int m_data_selector_rts;
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bool m_video_mode;
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bool m_display_on;
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@ -104,30 +118,41 @@ WRITE8_MEMBER( apricot_state::apricot_sysctrl_w )
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static const i8255_interface apricot_i8255a_intf =
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{
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_DEVICE_MEMBER("centronics", centronics_device, read),
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DEVCB_DEVICE_MEMBER("centronics", centronics_device, write),
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DEVCB_NULL,
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DEVCB_DRIVER_MEMBER(apricot_state, apricot_sysctrl_w),
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DEVCB_DRIVER_MEMBER(apricot_state, apricot_sysctrl_r),
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DEVCB_NULL
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};
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WRITE_LINE_MEMBER( apricot_state::apricot_pit8253_out1 )
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WRITE_LINE_MEMBER( apricot_state::timer_out1 )
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{
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/* connected to the rs232c interface */
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// receive clock via timer 1
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if (m_data_selector_rts == 0 && m_data_selector_dtr == 0)
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m_sio->rxca_w(state);
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}
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WRITE_LINE_MEMBER( apricot_state::apricot_pit8253_out2 )
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WRITE_LINE_MEMBER( apricot_state::timer_out2 )
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{
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/* connected to the rs232c interface */
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// transmit clock via timer 2
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if (m_data_selector_rts == 0 && m_data_selector_dtr == 0)
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m_sio->txca_w(state);
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// transmit and receive clock via timer 2
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if (m_data_selector_rts == 1 && m_data_selector_dtr == 0)
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{
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m_sio->txca_w(state);
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m_sio->rxca_w(state);
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}
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}
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static const struct pit8253_interface apricot_pit8253_intf =
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{
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{
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{ XTAL_4MHz / 16, DEVCB_LINE_VCC, DEVCB_DEVICE_LINE_MEMBER("ic31", pic8259_device, ir6_w) },
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{ 0 /*XTAL_4MHz / 2*/, DEVCB_LINE_VCC, DEVCB_DRIVER_LINE_MEMBER(apricot_state, apricot_pit8253_out1) },
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{ 0 /*XTAL_4MHz / 2*/, DEVCB_LINE_VCC, DEVCB_DRIVER_LINE_MEMBER(apricot_state, apricot_pit8253_out2) }
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{ XTAL_4MHz / 16, DEVCB_LINE_VCC, DEVCB_DEVICE_LINE_MEMBER("ic31", pic8259_device, ir6_w) },
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{ XTAL_4MHz / 2, DEVCB_LINE_VCC, DEVCB_DRIVER_LINE_MEMBER(apricot_state, timer_out1) },
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{ XTAL_4MHz / 2, DEVCB_LINE_VCC, DEVCB_DRIVER_LINE_MEMBER(apricot_state, timer_out2) }
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}
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};
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@ -137,18 +162,18 @@ static Z80SIO_INTERFACE( apricot_z80sio_intf )
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XTAL_4MHz / 16, XTAL_4MHz / 16,
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// channel a
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_DEVICE_LINE_MEMBER("rs232", serial_port_device, rx),
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DEVCB_DEVICE_LINE_MEMBER("rs232", serial_port_device, tx),
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DEVCB_DEVICE_LINE_MEMBER("rs232", rs232_port_device, dtr_w),
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DEVCB_DEVICE_LINE_MEMBER("rs232", rs232_port_device, rts_w),
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DEVCB_NULL, // wait/ready: i8089 data request channel 2
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DEVCB_NULL,
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// channel b
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_DRIVER_LINE_MEMBER(apricot_state, data_selector_dtr_w),
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DEVCB_DRIVER_LINE_MEMBER(apricot_state, data_selector_rts_w),
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DEVCB_NULL,
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DEVCB_NULL,
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@ -159,6 +184,25 @@ static Z80SIO_INTERFACE( apricot_z80sio_intf )
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DEVCB_NULL
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};
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// note: missing a receive clock callback to support external clock mode
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// (m_data_selector_rts == 1 and m_data_selector_dtr == 0)
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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_DEVICE_LINE_MEMBER("ic15", z80dart_device, dcda_w),
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DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, synca_w),
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DEVCB_NULL,
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DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, ctsa_w)
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};
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// note: fault output should be connected to syncb input of the sio
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static const centronics_interface apricot_centronics_intf =
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{
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DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, ctsb_w),
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DEVCB_DEVICE_LINE_MEMBER("ic15", z80dart_device, dcdb_w),
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DEVCB_NULL
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};
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/***************************************************************************
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FLOPPY
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@ -183,6 +227,31 @@ static const wd17xx_interface apricot_wd17xx_intf =
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{ FLOPPY_0, FLOPPY_1, NULL, NULL }
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};
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static LEGACY_FLOPPY_OPTIONS_START( apricot )
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LEGACY_FLOPPY_OPTION
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(
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apridisk, "dsk", "ACT Apricot disk image", apridisk_identify, apridisk_construct, NULL,
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HEADS(1-[2])
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TRACKS(70/[80])
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SECTORS([9]/18)
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SECTOR_LENGTH([512])
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FIRST_SECTOR_ID([1])
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)
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LEGACY_FLOPPY_OPTIONS_END
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static const floppy_interface apricot_floppy_interface =
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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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FLOPPY_STANDARD_3_5_DSDD,
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LEGACY_FLOPPY_OPTIONS_NAME(apricot),
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"floppy_3_5",
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NULL
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};
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/***************************************************************************
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VIDEO EMULATION
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@ -191,7 +260,7 @@ static const wd17xx_interface apricot_wd17xx_intf =
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UINT32 apricot_state::screen_update_apricot(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
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{
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if (!m_display_on)
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m_crtc->screen_update( screen, bitmap, cliprect);
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m_crtc->screen_update(screen, bitmap, cliprect);
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else
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bitmap.fill(RGB_BLACK, cliprect);
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@ -286,92 +355,53 @@ ADDRESS_MAP_END
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/***************************************************************************
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INPUT PORTS
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MACHINE DRIVERS
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***************************************************************************/
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static INPUT_PORTS_START( apricot )
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INPUT_PORTS_END
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/***************************************************************************
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SOUND INTERFACE
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**************************************************************************/
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//-------------------------------------------------
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// sn76496_config psg_intf
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//-------------------------------------------------
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static const sn76496_config psg_intf =
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{
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DEVCB_NULL
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};
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/***************************************************************************
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MACHINE DRIVERS
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***************************************************************************/
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static LEGACY_FLOPPY_OPTIONS_START( apricot )
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LEGACY_FLOPPY_OPTION
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(
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apridisk, "dsk", "ACT Apricot disk image", apridisk_identify, apridisk_construct, NULL,
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HEADS(1-[2])
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TRACKS(70/[80])
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SECTORS([9]/18)
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SECTOR_LENGTH([512])
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FIRST_SECTOR_ID([1])
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)
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LEGACY_FLOPPY_OPTIONS_END
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static const floppy_interface apricot_floppy_interface =
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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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FLOPPY_STANDARD_3_5_DSDD,
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LEGACY_FLOPPY_OPTIONS_NAME(apricot),
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"floppy_3_5",
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NULL
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};
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static MACHINE_CONFIG_START( apricot, apricot_state )
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/* basic machine hardware */
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MCFG_CPU_ADD("maincpu", I8086, XTAL_15MHz / 3)
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MCFG_CPU_PROGRAM_MAP(apricot_mem)
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MCFG_CPU_IO_MAP(apricot_io)
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// MCFG_CPU_ADD("ic71", I8089, XTAL_15MHz / 3)
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/* video hardware */
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// video hardware
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MCFG_SCREEN_ADD("screen", RASTER)
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MCFG_SCREEN_SIZE(800, 400)
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MCFG_SCREEN_VISIBLE_AREA(0, 800-1, 0, 400-1)
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MCFG_SCREEN_REFRESH_RATE(72)
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MCFG_SCREEN_UPDATE_DRIVER(apricot_state, screen_update_apricot)
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/* sound hardware */
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// sound hardware
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MCFG_SPEAKER_STANDARD_MONO("mono")
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MCFG_SOUND_ADD("ic7", SN76489, XTAL_4MHz / 2)
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MCFG_SOUND_CONFIG(psg_intf)
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MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
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/* internal ram */
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// internal ram
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MCFG_RAM_ADD(RAM_TAG)
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MCFG_RAM_DEFAULT_SIZE("256k")
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MCFG_RAM_EXTRA_OPTIONS("384k,512k") /* with 1 or 2 128k expansion boards */
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/* Devices */
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// devices
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MCFG_MC6845_ADD("ic30", MC6845, "screen", XTAL_15MHz / 10, apricot_mc6845_intf)
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MCFG_I8255A_ADD("ic17", apricot_i8255a_intf)
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MCFG_PIC8259_ADD("ic31", INPUTLINE("maincpu", 0), VCC, NULL)
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MCFG_PIT8253_ADD("ic16", apricot_pit8253_intf)
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MCFG_Z80SIO0_ADD("ic15", XTAL_15MHz / 6, apricot_z80sio_intf)
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/* floppy */
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// rs232 port
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MCFG_RS232_PORT_ADD("rs232", rs232_intf, default_rs232_devices, NULL)
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// centronics printer
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MCFG_CENTRONICS_PRINTER_ADD("centronics", apricot_centronics_intf)
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// floppy
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MCFG_WD2793_ADD("ic68", apricot_wd17xx_intf)
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MCFG_LEGACY_FLOPPY_2_DRIVES_ADD(apricot_floppy_interface)
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MACHINE_CONFIG_END
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@ -401,6 +431,6 @@ ROM_END
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GAME DRIVERS
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***************************************************************************/
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/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
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COMP( 1983, apricot, 0, 0, apricot, apricot, driver_device, 0, "ACT", "Apricot PC", GAME_NOT_WORKING )
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COMP( 1984, apricotxi, apricot, 0, apricotxi, apricot, driver_device, 0, "ACT", "Apricot Xi", GAME_NOT_WORKING )
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/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
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COMP( 1983, apricot, 0, 0, apricot, 0, driver_device, 0, "ACT", "Apricot PC", GAME_NOT_WORKING )
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COMP( 1984, apricotxi, apricot, 0, apricotxi, 0, driver_device, 0, "ACT", "Apricot Xi", GAME_NOT_WORKING )
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