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lwriter.cpp: Implement connection type DIP switch. (#8251)

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Jeff Muizelaar 2021-07-04 23:06:51 -04:00 committed by GitHub
parent 9eac44617b
commit 4a00d428c9
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1 changed files with 16 additions and 1 deletions
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17
src/mame/drivers/lwriter.cpp
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@ -105,6 +105,7 @@ public:
, m_maincpu(*this, "maincpu")
, m_scc(*this, "scc")
, m_via(*this, "via")
, m_dsw1(*this, "DSW1")
, m_overlay(1)
{ }
@ -131,6 +132,7 @@ private:
required_device<cpu_device> m_maincpu;
required_device<scc8530_device> m_scc;
required_device<via6522_device> m_via;
required_ioport m_dsw1;
uint16_t *m_dram_ptr, *m_sram_ptr, *m_rom_ptr;
bool m_overlay;
@ -216,6 +218,18 @@ void lwriter_state::maincpu_map(address_map &map)
}
static INPUT_PORTS_START( lwriter )
PORT_START("DSW1")
// Switch 1 | Switch 2 | switchsetting value | Meaning
// Down Down 0 serial batch mode 1200 baud (0)
// Up Down 1 serial batch mode 9600 baud (1)
// Down Up 2 diablo emulation (special switch = 0)
// Down Up 2 executive mode (special switch = 1)
// Up Up 3 apple talk
PORT_DIPNAME(0x60, 0x20, "Switch")
PORT_DIPSETTING( 0x00, "Serial batch mode 1200 baud")
PORT_DIPSETTING( 0x40, "Serial batch mode 9600 baud")
PORT_DIPSETTING( 0x20, "Diablo emulation (special switch = 0) / Executive mode (special switch = 1)")
PORT_DIPSETTING( 0x60, "AppleTalk")
INPUT_PORTS_END
/* Start it up */
@ -284,7 +298,8 @@ void lwriter_state::fifo_out_w(uint8_t data)
uint8_t lwriter_state::via_pa_r()
{
logerror(" VIA: Port A read!\n");
return 0xFF;
uint8_t result = m_dsw1->read();;
return result | 0x9C;
}
void lwriter_state::via_pa_w(uint8_t data)