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vt100.cpp: Simplify read/write handlers (nw)

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This commit is contained in:
AJR 2019-02-18 21:01:29 -05:00
parent 6f4abe3568
commit 24ee0ec10e
1 changed files with 24 additions and 23 deletions
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47
src/mame/drivers/vt100.cpp
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@ -89,18 +89,19 @@ private:
required_device<rst_pos_buffer_device> m_rstbuf;
required_device<rs232_port_device> m_rs232;
optional_device<ins8250_device> m_printer_uart;
DECLARE_READ8_MEMBER(flags_r);
DECLARE_WRITE8_MEMBER(baud_rate_w);
DECLARE_READ8_MEMBER(modem_r);
DECLARE_WRITE8_MEMBER(nvr_latch_w);
DECLARE_READ8_MEMBER(printer_r);
DECLARE_WRITE8_MEMBER(printer_w);
DECLARE_READ8_MEMBER(video_ram_r);
DECLARE_WRITE8_MEMBER(uart_clock_w);
required_shared_ptr<uint8_t> m_p_ram;
required_shared_ptr<u8> m_p_ram;
u8 flags_r();
u8 modem_r();
void nvr_latch_w(u8 data);
u8 printer_r(offs_t offset);
void printer_w(offs_t offset, u8 data);
u8 video_ram_r(offs_t offset);
void uart_clock_w(u8 data);
virtual void machine_start() override;
virtual void machine_reset() override;
uint32_t screen_update_vt100(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
u32 screen_update_vt100(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
IRQ_CALLBACK_MEMBER(vt102_irq_callback);
void vt100_mem(address_map &map);
void vt100_io(address_map &map);
@ -148,9 +149,9 @@ void vt100_state::vt180_io(address_map &map)
// 5 - NVR data H
// 6 - LBA 7 H
// 7 - Keyboard TBMT H
READ8_MEMBER(vt100_state::flags_r)
u8 vt100_state::flags_r()
{
uint8_t ret = 0;
u8 ret = 0;
ret |= m_pusart->txrdy_r();
ret |= !m_nvr->data_r() << 5;
@ -159,9 +160,9 @@ READ8_MEMBER(vt100_state::flags_r)
return ret;
}
READ8_MEMBER(vt100_state::modem_r)
u8 vt100_state::modem_r()
{
uint8_t ret = 0x0f;
u8 ret = 0x0f;
ret |= m_rs232->cts_r() << 7;
ret |= m_rs232->si_r() << 6;
@ -171,7 +172,7 @@ READ8_MEMBER(vt100_state::modem_r)
return ret;
}
WRITE8_MEMBER(vt100_state::nvr_latch_w)
void vt100_state::nvr_latch_w(u8 data)
{
// data inverted due to negative logic
m_nvr->c3_w(!BIT(data, 3));
@ -211,14 +212,14 @@ void vt100_state::vt100_io(address_map &map)
// map (0xe2, 0xe2)
}
READ8_MEMBER(vt100_state::printer_r)
u8 vt100_state::printer_r(offs_t offset)
{
return m_printer_uart->ins8250_r(space, offset >> 2);
return m_printer_uart->ins8250_r(machine().dummy_space(), offset >> 2);
}
WRITE8_MEMBER(vt100_state::printer_w)
void vt100_state::printer_w(offs_t offset, u8 data)
{
m_printer_uart->ins8250_w(space, offset >> 2, data);
m_printer_uart->ins8250_w(machine().dummy_space, offset >> 2, data);
}
void vt100_state::vt102_io(address_map &map)
@ -232,7 +233,7 @@ void vt100_state::vt102_io(address_map &map)
static INPUT_PORTS_START( vt100 )
INPUT_PORTS_END
uint32_t vt100_state::screen_update_vt100(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
u32 vt100_state::screen_update_vt100(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_crtc->video_update(bitmap, cliprect);
return 0;
@ -274,15 +275,15 @@ void vt100_state::machine_start()
void vt100_state::machine_reset()
{
nvr_latch_w(machine().dummy_space(), 0, 0);
nvr_latch_w(0);
}
READ8_MEMBER(vt100_state::video_ram_r)
u8 vt100_state::video_ram_r(offs_t offset)
{
return m_p_ram[offset];
}
WRITE8_MEMBER(vt100_state::uart_clock_w)
void vt100_state::uart_clock_w(u8 data)
{
m_kbduart->write_tcp(BIT(data, 1));
m_kbduart->write_rcp(BIT(data, 1));