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eis_twib.cpp: hooked up SDLC bitbanger device

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This commit is contained in:
Joakim Larsson Edstrom 2019-10-19 22:50:27 +02:00
parent eef80ce011
commit 778bf113b4
2 changed files with 5 additions and 23 deletions
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24
src/devices/bus/isa/eis_twib.cpp
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@ -95,22 +95,7 @@ TIMER_DEVICE_CALLBACK_MEMBER(isa8_eistwib_device::tick_bitclock)
{
m_uart8274->txca_w(m_bitclock);
m_uart8274->rxca_w(m_bitclock);
m_sdlclogger->clock_w(m_bitclock);
if (!m_bitclock)
{
m_shiftin = ((m_shiftin << 1) & 0xfe) | (m_txd ? 0x01 : 0);
if (m_shiftin == 0x7e)
{
if (!m_in_frame)
printf("SYNC found\n");
m_in_frame = !m_in_frame;
}
else if (m_in_frame);
{
printf("%d ", m_txd);
}
}
m_sdlcbitbanger->clock_w(m_bitclock);
m_bitclock = !m_bitclock;
}
@ -214,10 +199,10 @@ ioport_constructor isa8_eistwib_device::device_input_ports() const
//-------------------------------------------------
void isa8_eistwib_device::device_add_mconfig(machine_config &config)
{
SDLC_LOGGER(config, m_sdlclogger, 0); // To decode the frames
SDLC_BITBANGER(config, m_sdlcbitbanger, 0); // To decode the frames
I8274_NEW(config, m_uart8274, (XTAL(14'318'181)/ 3) / 2); // Half the 4,77 MHz ISA bus CLK signal
//m_uart8274->out_rtsa_callback().set([this] (int state) { m_rts = state; });
m_uart8274->out_txda_callback().set([this] (int state) { m_txd = state; m_sdlclogger->data_w(state); });
m_uart8274->out_txda_callback().set([this] (int state) { m_txd = state; m_sdlcbitbanger->data_w(state); });
m_uart8274->out_int_callback().set([this] (int state)
{ // Jumper field W1 decides what IRQs to pull
if (m_isairq->read() & 0x01) { LOGIRQ("TWIB IRQ2: %d\n", state); m_isa->irq2_w(state); }
@ -234,11 +219,10 @@ isa8_eistwib_device::isa8_eistwib_device(const machine_config &mconfig, const ch
device_t(mconfig, ISA8_EIS_TWIB, tag, owner, clock)
, device_isa8_card_interface(mconfig, *this)
, m_uart8274(*this, "terminal")
, m_sdlclogger(*this, "logger")
, m_sdlcbitbanger(*this, "bitbanger")
, m_bitclock(false)
, m_rts(false)
, m_txd(false)
, m_in_frame(false)
, m_sw1(*this, "SW1")
, m_isairq(*this, "W1")
, m_installed(false)

4
src/devices/bus/isa/eis_twib.h
View File

@ -28,7 +28,7 @@ protected:
// devices
required_device<i8274_new_device> m_uart8274;
required_device<sdlc_logger_device> m_sdlclogger;
required_device<sdlc_bitbanger_device> m_sdlcbitbanger;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
@ -39,8 +39,6 @@ protected:
bool m_bitclock;
bool m_rts;
bool m_txd;
bool m_in_frame;
uint8_t m_shiftin;
// helpers
required_ioport m_sw1;