diff options
Diffstat (limited to 'src/emu/bus/isa/p1_fdc.c')
-rw-r--r-- | src/emu/bus/isa/p1_fdc.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/src/emu/bus/isa/p1_fdc.c b/src/emu/bus/isa/p1_fdc.c new file mode 100644 index 00000000000..6035b677463 --- /dev/null +++ b/src/emu/bus/isa/p1_fdc.c @@ -0,0 +1,214 @@ +// license:BSD-3-Clause +// copyright-holders:XXX +/********************************************************************** + + Poisk-1 FDC device (model B504) + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#include "p1_fdc.h" + +#include "cpu/i86/i86.h" +#include "formats/dsk_dsk.h" +#include "formats/pc_dsk.h" + +#define VERBOSE_DBG 0 + +#define DBG_LOG(N,M,A) \ + do { \ + if(VERBOSE_DBG>=N) \ + { \ + if( M ) \ + logerror("%11.6f: %-24s",machine().time().as_double(),(char*)M ); \ + logerror A; \ + } \ + } while (0) + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type P1_FDC = &device_creator<p1_fdc_device>; + +static DECLARE_READ8_DEVICE_HANDLER(p1_FDC_r); +static DECLARE_WRITE8_DEVICE_HANDLER(p1_FDC_w); + +FLOPPY_FORMATS_MEMBER( p1_fdc_device::floppy_formats ) + FLOPPY_PC_FORMAT, + FLOPPY_DSK_FORMAT +FLOPPY_FORMATS_END + +static SLOT_INTERFACE_START( poisk1_floppies ) + SLOT_INTERFACE( "525qd", FLOPPY_525_QD ) +SLOT_INTERFACE_END + +static MACHINE_CONFIG_FRAGMENT( fdc_b504 ) + MCFG_FD1793x_ADD("fdc", XTAL_16MHz / 16) + MCFG_FLOPPY_DRIVE_ADD("fdc:0", poisk1_floppies, "525qd", p1_fdc_device::floppy_formats) + MCFG_FLOPPY_DRIVE_ADD("fdc:1", poisk1_floppies, "525qd", p1_fdc_device::floppy_formats) +MACHINE_CONFIG_END + +//------------------------------------------------- +// ROM( p1_fdc ) +//------------------------------------------------- + +ROM_START( p1_fdc ) + ROM_REGION( 0x0800, "p1_fdc", 0 ) + ROM_DEFAULT_BIOS("a302") + ROM_SYSTEM_BIOS(0, "normal", "B504 standard ROM") + ROMX_LOAD( "b_ngmd_n.rf2", 0x00000, 0x0800, CRC(967e172a) SHA1(95117c40fd9f624fee08ccf37f615b16ff249688), ROM_BIOS(1)) + ROM_SYSTEM_BIOS(1, "a302", "v3.02") // Additional ROM BIOS v3.02 for DISKETTE service (c) Moscow 1991 + ROMX_LOAD( "b_ngmd_t.rf2", 0x00000, 0x0800, CRC(630010b1) SHA1(50876fe4f5f4f32a242faa70f9154574cd315ec4), ROM_BIOS(2)) + ROM_SYSTEM_BIOS(2, "ae304", "v3.04") // Additional enhanced ROM BIOS v3.04 for DISKETTE service (c) V.Rusakow Moscow 1992 + ROMX_LOAD( "p_fdd_nm.bin", 0x00000, 0x0800, CRC(0b7f867d) SHA1(9fe7e0ab2242e50394d1162cf1a619b6f2994bfb), ROM_BIOS(3)) + ROM_SYSTEM_BIOS(3, "ae308", "v3.08") // Additional enhanced ROM BIOS v3.08 for DISKETTE service (c) V.Rusakov Tarasovka 1992 + ROMX_LOAD( "p_fdd_my.bin", 0x00000, 0x0800, CRC(da5d0eaf) SHA1(b188ba856bd28e4964a88feb0b0b2ba7eb320efc), ROM_BIOS(4)) +ROM_END + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor p1_fdc_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( fdc_b504 ); +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *p1_fdc_device::device_rom_region() const +{ + return ROM_NAME( p1_fdc ); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +UINT8 p1_fdc_device::p1_wd17xx_motor_r() +{ + DBG_LOG(1,"p1_fdc_motor_r",("R = $%02x\n", 0)); + // XXX always on for now + return 0; +} + +UINT8 p1_fdc_device::p1_wd17xx_aux_r() +{ + cpu_device *maincpu = machine().device<cpu_device>("maincpu"); + + if (!m_fdc->drq_r() && !m_fdc->intrq_r()) { + // fake cpu wait by resetting PC one insn back + maincpu->set_state_int(I8086_IP, maincpu->state_int(I8086_IP) - 2); + maincpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE); + } + + return m_fdc->drq_r(); +} + +/* +; D0 - DRIVE SELECT 0 +; D1 - DRIVE SELECT 1 +; D2 - MOTOR ON 0 +; D3 - MOTOR ON 1 +; D4 - SIDE (HEAD) SELECT +; D5 - DOUBLE DENSITY +; D6 - FDC RESET +; D7 - NO USE +*/ +void p1_fdc_device::p1_wd17xx_aux_w(int data) +{ + DBG_LOG(1,"p1_fdc_aux_w",("W $%02x\n", data)); + + floppy_image_device *floppy0 = m_fdc->subdevice<floppy_connector>("0")->get_device(); + floppy_image_device *floppy1 = m_fdc->subdevice<floppy_connector>("1")->get_device(); + floppy_image_device *floppy = ((data & 2)?floppy1:floppy0); + + if(!BIT(data, 6)) + m_fdc->reset(); + + m_fdc->set_floppy(floppy); + + floppy->ss_w(BIT(data, 4)); + m_fdc->dden_w(BIT(data, 5)); + + floppy0->mon_w(!(data & 4)); + floppy1->mon_w(!(data & 8)); +} + +void p1_fdc_device::p1_fdc_irq_drq(bool state) +{ + cpu_device *maincpu = machine().device<cpu_device>("maincpu"); + + if(state) + maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE); +} + +static READ8_DEVICE_HANDLER( p1_FDC_r ) +{ + UINT8 data = 0xff; + p1_fdc_device *fdc = downcast<p1_fdc_device *>(device); + + switch( offset ) + { + case 0: data = fdc->p1_wd17xx_aux_r(); break; + case 2: data = fdc->p1_wd17xx_motor_r(); break; + } + + return data; +} + +static WRITE8_DEVICE_HANDLER( p1_FDC_w ) +{ + p1_fdc_device *fdc = downcast<p1_fdc_device *>(device); + + switch( offset ) + { + case 0: fdc->p1_wd17xx_aux_w(data); break; + } +} + +//------------------------------------------------- +// p1_fdc_device - constructor +//------------------------------------------------- + +p1_fdc_device::p1_fdc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, P1_FDC, "Poisk-1 floppy B504", tag, owner, clock, "p1_fdc", __FILE__), + device_isa8_card_interface( mconfig, *this ), + m_fdc(*this, "fdc") +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void p1_fdc_device::device_start() +{ + set_isa_device(); + m_isa->install_rom(this, 0xe0000, 0xe07ff, 0, 0, "XXX", "p1_fdc"); + m_isa->install_device(0x00c0, 0x00c3, 0, 0, + READ8_DEVICE_DELEGATE(m_fdc, fd1793_t, read), + WRITE8_DEVICE_DELEGATE(m_fdc, fd1793_t, write) ); + m_isa->install_device(this, 0x00c4, 0x00c7, 0, 0, FUNC(p1_FDC_r), FUNC(p1_FDC_w) ); + m_fdc->setup_drq_cb(fd1793_t::line_cb(FUNC(p1_fdc_device::p1_fdc_irq_drq), this)); + m_fdc->setup_intrq_cb(fd1793_t::line_cb(FUNC(p1_fdc_device::p1_fdc_irq_drq), this)); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void p1_fdc_device::device_reset() +{ +} |