diff options
author | Robbbert <robbbert@users.noreply.github.com> | 2013-12-15 05:33:35 +0000 |
---|---|---|
committer | Robbbert <robbbert@users.noreply.github.com> | 2013-12-15 05:33:35 +0000 |
commit | 098d8d7d189fa3230c6956a0f935026021107d97 (patch) | |
tree | 7f03be65161d36f625d636d860c7c5de4b95e89f /src | |
parent | ad44f27ff973707a3325e4d4d06f66edeab190dc (diff) |
(MESS) v6809 : added fdc
Diffstat (limited to 'src')
-rw-r--r-- | src/mess/drivers/v6809.c | 50 |
1 files changed, 44 insertions, 6 deletions
diff --git a/src/mess/drivers/v6809.c b/src/mess/drivers/v6809.c index a45af03eca5..f0cba64b587 100644 --- a/src/mess/drivers/v6809.c +++ b/src/mess/drivers/v6809.c @@ -31,14 +31,20 @@ M modify memory (. to exit) ToDo: -- Colours (a photo shows colours but the schematic doesn't + - Colours (a photo shows colours but the schematic doesn't have any ram for colours). -- Connect the devices (RTC, FDC). + - Connect the RTC. -- Find the missing character generator rom. + - Find the missing character generator rom. -- Add sound. Pressing BEL character issues commands to the timer chip. + - Add sound. Pressing BEL character issues commands to the timer chip. + + - Schematic is almost useless, riddled with omissions and errors. + All documents are in French, so no help there. The parts list + only has half of the parts. + + - Need software ****************************************************************************/ @@ -51,6 +57,7 @@ ToDo: #include "machine/6850acia.h" #include "machine/keyboard.h" #include "sound/speaker.h" +#include "machine/wd_fdc.h" @@ -63,9 +70,12 @@ public: , m_pia0(*this, "pia0") , m_maincpu(*this, "maincpu") , m_crtc(*this, "crtc") + , m_fdc(*this, "fdc") + , m_floppy0(*this, "fdc:0") { } DECLARE_READ8_MEMBER(pb_r); + DECLARE_WRITE8_MEMBER(pa_w); DECLARE_WRITE8_MEMBER(videoram_w); DECLARE_WRITE8_MEMBER(v6809_address_w); DECLARE_WRITE8_MEMBER(v6809_register_w); @@ -81,6 +91,8 @@ private: required_device<pia6821_device> m_pia0; required_device<cpu_device> m_maincpu; required_device<mc6845_device> m_crtc; + required_device<mb8876_t> m_fdc; + required_device<floppy_connector> m_floppy0; }; @@ -94,7 +106,7 @@ static ADDRESS_MAP_START(v6809_mem, AS_PROGRAM, 8, v6809_state) AM_RANGE(0xf505, 0xf505) AM_MIRROR(0x36) AM_DEVREADWRITE("acia0", acia6850_device, data_read, data_write) AM_RANGE(0xf50c, 0xf50c) AM_MIRROR(0x36) AM_DEVREADWRITE("acia1", acia6850_device, status_read, control_write) // printer AM_RANGE(0xf50d, 0xf50d) AM_MIRROR(0x36) AM_DEVREADWRITE("acia1", acia6850_device, data_read, data_write) - //AM_RANGE(0xf600, 0xf603) AM_MIRROR(0x3c) disk controller + AM_RANGE(0xf600, 0xf603) AM_MIRROR(0x3c) AM_DEVREADWRITE("fdc", mb8876_t, read, write) //AM_RANGE(0xf640, 0xf64f) AM_MIRROR(0x30) real time clock AM_RANGE(0xf680, 0xf683) AM_MIRROR(0x3c) AM_DEVREADWRITE("pia0", pia6821_device, read, write) AM_RANGE(0xf6c8, 0xf6cf) AM_MIRROR(0x08) AM_DEVREADWRITE("ptm", ptm6840_device, read, write) @@ -239,6 +251,26 @@ READ8_MEMBER( v6809_state::pb_r ) return ret; } +// can support 4 drives +WRITE8_MEMBER( v6809_state::pa_w ) +{ + floppy_image_device *floppy = NULL; + if ((data & 3) == 0) floppy = m_floppy0->get_device(); + //if ((data & 3) == 1) floppy = m_floppy1->get_device(); + //if ((data & 3) == 2) floppy = m_floppy2->get_device(); + //if ((data & 3) == 3) floppy = m_floppy3->get_device(); + + m_fdc->set_floppy(floppy); + +// Bits 2 and 3 go to the floppy connector but are not documented + + if (floppy) + { + floppy->mon_w(0); + m_fdc->dden_w(BIT(data, 4)); + } +} + // port A = drive select and 2 control lines ; port B = keyboard static const pia6821_interface pia0_intf = { @@ -248,7 +280,7 @@ static const pia6821_interface pia0_intf = DEVCB_NULL, /* CB1 input */ DEVCB_NULL, /* CA2 input */ DEVCB_NULL, /* CB2 input */ - DEVCB_NULL, /* port A output */ + DEVCB_DRIVER_MEMBER(v6809_state, pa_w), /* port A output */ DEVCB_NULL, /* port B output */ DEVCB_NULL, /* CA2 output */ DEVCB_NULL, /* CB2 output */ @@ -295,6 +327,10 @@ static ACIA6850_INTERFACE( mc6850_intf ) DEVCB_NULL }; +static SLOT_INTERFACE_START( v6809_floppies ) + SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) +SLOT_INTERFACE_END + // *** Machine **** static MACHINE_CONFIG_START( v6809, v6809_state ) @@ -328,6 +364,8 @@ static MACHINE_CONFIG_START( v6809, v6809_state ) MCFG_PTM6840_ADD("ptm", mc6840_intf) MCFG_ACIA6850_ADD("acia0", mc6850_intf) MCFG_ACIA6850_ADD("acia1", mc6850_intf) + MCFG_MB8876x_ADD("fdc", XTAL_16MHz / 16) + MCFG_FLOPPY_DRIVE_ADD("fdc:0", v6809_floppies, "525dd", floppy_image_device::default_floppy_formats) MACHINE_CONFIG_END /* ROM definition */ |