Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-25 17:56:43 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

octopus: add serial vector ports. (Unused for now, but makes Concurrent DOS 5.2 a little bit happier)

Browse Source
This commit is contained in:
mahlemiut 2016-10-08 15:53:35 +13:00
parent d7ab810128
commit 1e61cd0534
1 changed files with 41 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
src/mame/drivers/octopus.cpp
View File

@ -182,6 +182,8 @@ public:
IRQ_CALLBACK_MEMBER(x86_irq_cb);
DECLARE_READ8_MEMBER(rtc_r);
DECLARE_WRITE8_MEMBER(rtc_w);
DECLARE_READ8_MEMBER(z80_vector_r);
DECLARE_WRITE8_MEMBER(z80_vector_w);
DECLARE_WRITE_LINE_MEMBER(spk_w);
DECLARE_WRITE_LINE_MEMBER(spk_freq_w);
@ -242,6 +244,8 @@ private:
bool m_rtc_address;
bool m_rtc_data;
UINT8 m_prev_cntl;
UINT8 m_rs232_vector;
UINT8 m_rs422_vector;
emu_timer* m_timer_beep;
};
@ -283,8 +287,7 @@ static ADDRESS_MAP_START( octopus_io, AS_IO, 8, octopus_state )
AM_RANGE(0xca, 0xca) AM_RAM // attribute writes go here
// 0xcf: mode control
AM_RANGE(0xd0, 0xd3) AM_DEVREADWRITE("fdc", fd1793_t, read, write)
// 0xe0: Z80 interrupt vector for RS232
// 0xe4: Z80 interrupt vector for RS422
AM_RANGE(0xe0, 0xe4) AM_READWRITE(z80_vector_r, z80_vector_w)
// 0xf0-f1: Parallel interface data I/O (Centronics), and control/status
AM_RANGE(0xf8, 0xff) AM_DEVREADWRITE("ppi", i8255_device, read, write)
ADDRESS_MAP_END
@ -434,6 +437,38 @@ WRITE8_MEMBER(octopus_state::z80_io_w)
m_z80_active = false;
}
// Z80 vector for RS232 and RS422
READ8_MEMBER(octopus_state::z80_vector_r)
{
switch(offset)
{
case 0:
return m_rs232_vector;
case 4:
return m_rs422_vector;
default:
return 0xff;
}
return 0xff;
}
WRITE8_MEMBER(octopus_state::z80_vector_w)
{
switch(offset)
{
case 0:
m_rs232_vector = data;
logerror("RS232 vector set to %02x\n",data);
break;
case 4:
m_rs422_vector = data;
logerror("RS422 vector set to %02x\n",data);
break;
default:
logerror("Read invalid vector port 0x%02x\n",0xe0 + offset);
}
}
// RTC data and I/O - PPI port A
// bits 0-3 of RTC/FDC control go to control lines of the MC146818
// The technical manual does not mention what is connected to each bit
@ -610,7 +645,10 @@ IRQ_CALLBACK_MEMBER(octopus_state::x86_irq_cb)
m_subcpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
m_maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);
m_z80_active = false;
return m_pic1->inta_cb(device,irqline);
if((strcmp(device.tag(),"pic_master") == 0) && irqline == 1)
return m_serial->m1_r();
else
return m_pic1->inta_cb(device,irqline);
}
void octopus_state::machine_start()