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octopus: fixed floppy use, now attempts to boot from floppy. CP/M 86-80 Plus and MS-DOS both now load to the command prompt.

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This commit is contained in:
mahlemiut 2016-09-15 16:05:19 +12:00
parent 744dfd9386
commit ea54425ac6
1 changed files with 51 additions and 33 deletions
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84
src/mame/drivers/octopus.cpp
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@ -133,8 +133,8 @@ public:
m_pic2(*this, "pic_slave"),
m_rtc(*this, "rtc"),
m_fdc(*this, "fdc"),
m_floppy0(*this, "fdc:floppy0"),
m_floppy1(*this, "fdc:floppy1"),
m_floppy0(*this, "fdc:0"),
m_floppy1(*this, "fdc:1"),
m_current_dma(-1)
{ }
@ -156,6 +156,8 @@ public:
DECLARE_WRITE8_MEMBER(cntl_w);
DECLARE_READ8_MEMBER(gpo_r);
DECLARE_WRITE8_MEMBER(gpo_w);
DECLARE_READ8_MEMBER(vidcontrol_r);
DECLARE_WRITE8_MEMBER(vidcontrol_w);
DECLARE_WRITE_LINE_MEMBER(dack0_w) { m_dma1->hack_w(state ? 0 : 1); } // for all unused DMA channel?
DECLARE_WRITE_LINE_MEMBER(dack1_w) { if(!state) m_current_dma = 1; else if(m_current_dma == 1) m_current_dma = -1; } // HD
@ -187,6 +189,7 @@ private:
UINT8 m_current_drive;
UINT8 m_cntl; // RTC / FDC control (PPI port B)
UINT8 m_gpo; // General purpose outputs (PPI port C)
UINT8 m_vidctrl;
};
@ -211,18 +214,16 @@ static ADDRESS_MAP_START( octopus_io, AS_IO, 8, octopus_state )
AM_RANGE(0x10, 0x1f) AM_DEVREADWRITE("dma2", am9517a_device, read, write)
AM_RANGE(0x20, 0x20) AM_READ_PORT("DSWA")
AM_RANGE(0x21, 0x2f) AM_READWRITE(system_r, system_w)
// 0x31: hard disk bank
// 0x32: floppy bank
// 0x33: RAM refresh / Z80 bank
AM_RANGE(0x31, 0x33) AM_READWRITE(bank_sel_r, bank_sel_w)
// 0x50-51: Keyboard (i8251)
AM_RANGE(0x50, 0x51) AM_NOP
// 0x70-73: HD controller
// 0x80-83: serial timers (i8253)
// 0xa0-a3: serial interface (Z80 SIO/2)
AM_RANGE(0xb0, 0xb1) AM_DEVREADWRITE("pic_master", pic8259_device, read, write)
AM_RANGE(0xb4, 0xb5) AM_DEVREADWRITE("pic_slave", pic8259_device, read, write)
AM_RANGE(0xc0, 0xc7) AM_DEVREADWRITE("crtc", scn2674_device, read, write)
// 0xc8: video control
AM_RANGE(0xc8, 0xc8) AM_READWRITE(vidcontrol_r, vidcontrol_w)
AM_RANGE(0xc9, 0xc9) AM_DEVREADWRITE("crtc", scn2674_device, buffer_r, buffer_w)
AM_RANGE(0xca, 0xca) AM_RAM // attribute writes go here
// 0xcf: mode control
@ -248,7 +249,6 @@ ADDRESS_MAP_END
/* Input ports */
static INPUT_PORTS_START( octopus )
PORT_START("DSWA")
PORT_DIPNAME( 0x03, 0x02, "Number of floppy drives" ) PORT_DIPLOCATION("SWA:1,2")
PORT_DIPSETTING( 0x00, "None" )
@ -273,7 +273,6 @@ static INPUT_PORTS_START( octopus )
PORT_DIPNAME( 0x80, 0x80, "Colour monitor connected" ) PORT_DIPLOCATION("SWA:8")
PORT_DIPSETTING( 0x00, DEF_STR( No ) )
PORT_DIPSETTING( 0x80, DEF_STR( Yes ) )
INPUT_PORTS_END
@ -347,7 +346,7 @@ READ8_MEMBER(octopus_state::system_r)
return 0xff;
}
// RTC/FDC control
// RTC/FDC control - PPI port B
// bit4-5: write precomp.
// bit6-7: drive select
READ8_MEMBER(octopus_state::cntl_r)
@ -363,12 +362,14 @@ WRITE8_MEMBER(octopus_state::cntl_w)
{
case 1:
m_fdc->set_floppy(m_floppy0->get_device());
m_floppy0->get_device()->mon_w(0);
break;
case 2:
m_fdc->set_floppy(m_floppy1->get_device());
m_floppy1->get_device()->mon_w(0);
break;
}
logerror("Selected floppy drive %i\n",m_current_drive);
logerror("Selected floppy drive %i (%02x)\n",m_current_drive,data);
}
// General Purpose Outputs - PPI port C
@ -386,24 +387,42 @@ WRITE8_MEMBER(octopus_state::gpo_w)
switch(m_current_drive)
{
case 1:
m_floppy0->get_device()->ss_w(data & 0x04);
m_floppy0->get_device()->ss_w((data & 0x04) >> 2);
break;
case 2:
m_floppy1->get_device()->ss_w(data & 0x04);
m_floppy1->get_device()->ss_w((data & 0x04) >> 2);
break;
default:
logerror("Attempted to set side on unknown drive %i\n",m_current_drive);
}
}
// Video control register
// bit 0 - video dot clock - 0=17.6MHz, 1=16MHz
// bit 2 - floppy DDEN line
// bit 3 - floppy FCLOCK line - 0=1MHz, 1=2MHz
// bits 4-5 - character width - 0=10 dots, 1=6 dots, 2=8 dots, 3=9 dots
// bit 6 - cursor mode (colour only) - 0=inverse cursor, 1=white cursor (normal)
// bit 7 - 1=monochrome mode, 0=colour mode
READ8_MEMBER(octopus_state::vidcontrol_r)
{
return m_vidctrl;
}
WRITE8_MEMBER(octopus_state::vidcontrol_w)
{
m_vidctrl = data;
m_fdc->dden_w(data & 0x04);
m_fdc->set_unscaled_clock((data & 0x08) ? XTAL_16MHz / 16 : XTAL_16MHz / 8);
}
READ8_MEMBER(octopus_state::dma_read)
{
UINT8 byte;
address_space& prog_space = m_maincpu->space(AS_PROGRAM); // get the right address space
if(m_current_dma == -1)
return 0;
logerror("DMA: MEMR off %06x\n",offset);
byte = prog_space.read_byte(offset);
byte = prog_space.read_byte((m_fd_bank << 16) + offset);
return byte;
}
@ -412,8 +431,7 @@ WRITE8_MEMBER(octopus_state::dma_write)
address_space& prog_space = m_maincpu->space(AS_PROGRAM); // get the right address space
if(m_current_dma == -1)
return;
logerror("DMA: MEMW off %06x data %02x\n",offset,data);
prog_space.write_byte(offset, data);
prog_space.write_byte((m_fd_bank << 16) + offset, data);
}
WRITE_LINE_MEMBER( octopus_state::dma_hrq_changed )
@ -474,29 +492,30 @@ static MACHINE_CONFIG_START( octopus, octopus_state )
MCFG_I8237_OUT_HREQ_CB(DEVWRITELINE("dma2", am9517a_device, dreq0_w))
MCFG_I8237_IN_MEMR_CB(READ8(octopus_state,dma_read))
MCFG_I8237_OUT_MEMW_CB(WRITE8(octopus_state,dma_write))
MCFG_I8237_IN_IOR_0_CB(NOOP)
MCFG_I8237_IN_IOR_1_CB(NOOP) // HDC
MCFG_I8237_IN_IOR_2_CB(NOOP) // RAM Refresh
MCFG_I8237_IN_IOR_3_CB(NOOP)
MCFG_I8237_OUT_IOW_0_CB(NOOP)
MCFG_I8237_OUT_IOW_1_CB(NOOP) // HDC
MCFG_I8237_OUT_IOW_2_CB(NOOP) // RAM Refresh
MCFG_I8237_OUT_IOW_3_CB(NOOP)
//MCFG_I8237_IN_IOR_0_CB(NOOP)
//MCFG_I8237_IN_IOR_1_CB(NOOP) // HDC
//MCFG_I8237_IN_IOR_2_CB(NOOP) // RAM Refresh
//MCFG_I8237_IN_IOR_3_CB(NOOP)
//MCFG_I8237_OUT_IOW_0_CB(NOOP)
//MCFG_I8237_OUT_IOW_1_CB(NOOP) // HDC
//MCFG_I8237_OUT_IOW_2_CB(NOOP) // RAM Refresh
//MCFG_I8237_OUT_IOW_3_CB(NOOP)
MCFG_I8237_OUT_DACK_0_CB(WRITELINE(octopus_state, dack0_w))
MCFG_I8237_OUT_DACK_1_CB(WRITELINE(octopus_state, dack1_w))
MCFG_I8237_OUT_DACK_2_CB(WRITELINE(octopus_state, dack2_w))
MCFG_I8237_OUT_DACK_3_CB(WRITELINE(octopus_state, dack3_w))
MCFG_DEVICE_ADD("dma2", AM9517A, XTAL_24MHz / 6) // 4MHz
MCFG_I8237_OUT_HREQ_CB(WRITELINE(octopus_state, dma_hrq_changed))
MCFG_I8237_IN_MEMR_CB(READ8(octopus_state,dma_read))
MCFG_I8237_OUT_MEMW_CB(WRITE8(octopus_state,dma_write))
MCFG_I8237_IN_IOR_0_CB(NOOP)
//MCFG_I8237_IN_IOR_0_CB(NOOP)
MCFG_I8237_IN_IOR_1_CB(DEVREAD8("fdc",fd1793_t,data_r)) // FDC
MCFG_I8237_IN_IOR_2_CB(NOOP)
MCFG_I8237_IN_IOR_3_CB(NOOP)
MCFG_I8237_OUT_IOW_0_CB(NOOP)
//MCFG_I8237_IN_IOR_2_CB(NOOP)
//MCFG_I8237_IN_IOR_3_CB(NOOP)
//MCFG_I8237_OUT_IOW_0_CB(NOOP)
MCFG_I8237_OUT_IOW_1_CB(DEVWRITE8("fdc",fd1793_t,data_w)) // FDC
MCFG_I8237_OUT_IOW_2_CB(NOOP)
MCFG_I8237_OUT_IOW_3_CB(NOOP)
//MCFG_I8237_OUT_IOW_2_CB(NOOP)
//MCFG_I8237_OUT_IOW_3_CB(NOOP)
MCFG_I8237_OUT_DACK_0_CB(WRITELINE(octopus_state, dack4_w))
MCFG_I8237_OUT_DACK_1_CB(WRITELINE(octopus_state, dack5_w))
MCFG_I8237_OUT_DACK_2_CB(WRITELINE(octopus_state, dack6_w))
@ -519,13 +538,12 @@ static MACHINE_CONFIG_START( octopus, octopus_state )
MCFG_FD1793_ADD("fdc",XTAL_16MHz / 8)
MCFG_WD_FDC_INTRQ_CALLBACK(DEVWRITELINE("pic_master",pic8259_device, ir5_w))
MCFG_WD_FDC_DRQ_CALLBACK(DEVWRITELINE("dma2",am9517a_device, dreq1_w))
MCFG_FLOPPY_DRIVE_ADD("fdc:floppy0", octopus_floppies, "525dd", floppy_image_device::default_floppy_formats)
MCFG_FLOPPY_DRIVE_ADD("fdc:floppy1", octopus_floppies, "525dd", floppy_image_device::default_floppy_formats)
MCFG_FLOPPY_DRIVE_ADD("fdc:0", octopus_floppies, "525dd", floppy_image_device::default_floppy_formats)
MCFG_FLOPPY_DRIVE_ADD("fdc:1", octopus_floppies, "525dd", floppy_image_device::default_floppy_formats)
// TODO: add components
// i8253 PIT timer (speaker output, serial timing, other stuff too?)
// i8251 serial controller (keyboard)
// i8255A PPI (RTC access, FDC)
// Centronics parallel interface
// Z80SIO/2 (serial)
// Winchester HD controller (Xebec/SASI compatible? uses TTL logic)