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hp64k: UART & loopback relay added

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This commit is contained in:
fulivi 2015-08-11 15:34:55 +02:00
parent 8678562f7e
commit 79e87536d5
1 changed files with 62 additions and 3 deletions
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65
src/mess/drivers/hp64k.c
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@ -219,6 +219,11 @@ public:
DECLARE_WRITE16_MEMBER(hp64k_usart_w);
DECLARE_WRITE_LINE_MEMBER(hp64k_rxrdy_w);
DECLARE_WRITE_LINE_MEMBER(hp64k_txrdy_w);
DECLARE_WRITE_LINE_MEMBER(hp64k_txd_w);
DECLARE_WRITE_LINE_MEMBER(hp64k_dtr_w);
DECLARE_WRITE_LINE_MEMBER(hp64k_rts_w);
DECLARE_WRITE16_MEMBER(hp64k_loopback_w);
void hp64k_update_loopback(void);
DECLARE_WRITE16_MEMBER(hp64k_beep_w);
TIMER_DEVICE_CALLBACK_MEMBER(hp64k_beeper_off);
@ -298,6 +303,10 @@ private:
bool m_16x_clk;
bool m_baud_clk;
UINT8 m_16x_div;
bool m_loopback;
bool m_txd_state;
bool m_dtr_state;
bool m_rts_state;
};
static ADDRESS_MAP_START(cpu_mem_map , AS_PROGRAM , 16 , hp64k_state)
@ -324,8 +333,8 @@ static ADDRESS_MAP_START(cpu_io_map , AS_IO , 16 , hp64k_state)
// Read from USART
AM_RANGE(HP_MAKE_IOADDR(6 , 0) , HP_MAKE_IOADDR(6 , 3)) AM_READ(hp64k_usart_r)
// PA = 7, IC = 2
// Rear-panel switches
AM_RANGE(HP_MAKE_IOADDR(7 , 2) , HP_MAKE_IOADDR(7 , 2)) AM_READ(hp64k_rear_sw_r)
// Rear-panel switches and loopback relay control
AM_RANGE(HP_MAKE_IOADDR(7 , 2) , HP_MAKE_IOADDR(7 , 2)) AM_READWRITE(hp64k_rear_sw_r , hp64k_loopback_w)
// PA = 9, IC = [0..3]
// Beeper control & interrupt status read
AM_RANGE(HP_MAKE_IOADDR(9 , 0) , HP_MAKE_IOADDR(9 , 3)) AM_WRITE(hp64k_beep_w)
@ -417,6 +426,11 @@ void hp64k_state::machine_reset()
m_beeper->set_state(0);
m_baud_rate->set_unscaled_clock(BAUD_RATE_GEN_CLOCK / baud_rate_divisors[ (m_s5_sw->read() >> 1) & 0xf ]);
m_16x_clk = (m_rs232_sw->read() & 0x02) != 0;
m_loopback = false;
m_txd_state = true;
m_dtr_state = true;
m_rts_state = true;
}
UINT8 hp64k_state::hp64k_crtc_filter(UINT8 data)
@ -990,6 +1004,49 @@ WRITE_LINE_MEMBER(hp64k_state::hp64k_txrdy_w)
hp64k_update_irl();
}
WRITE_LINE_MEMBER(hp64k_state::hp64k_txd_w)
{
m_txd_state = state;
if (m_loopback) {
m_uart->write_rxd(state);
}
}
WRITE_LINE_MEMBER(hp64k_state::hp64k_dtr_w)
{
m_dtr_state = state;
if (m_loopback) {
m_uart->write_dsr(state);
}
}
WRITE_LINE_MEMBER(hp64k_state::hp64k_rts_w)
{
m_rts_state = state;
if (m_loopback) {
m_uart->write_cts(state);
}
}
WRITE16_MEMBER(hp64k_state::hp64k_loopback_w)
{
m_loopback = BIT(data , 11);
hp64k_update_loopback();
}
void hp64k_state::hp64k_update_loopback(void)
{
if (m_loopback) {
m_uart->write_rxd(m_txd_state);
m_uart->write_dsr(m_dtr_state);
m_uart->write_cts(m_rts_state);
} else {
m_uart->write_rxd(1);
m_uart->write_dsr(1);
m_uart->write_cts(1);
}
}
WRITE16_MEMBER(hp64k_state::hp64k_beep_w)
{
if (!BIT(offset , 0)) {
@ -1325,7 +1382,9 @@ static MACHINE_CONFIG_START(hp64k , hp64k_state)
MCFG_DEVICE_ADD("uart" , I8251 , 0)
MCFG_I8251_RXRDY_HANDLER(WRITELINE(hp64k_state , hp64k_rxrdy_w));
MCFG_I8251_TXRDY_HANDLER(WRITELINE(hp64k_state , hp64k_txrdy_w));
MCFG_I8251_TXD_HANDLER(WRITELINE(hp64k_state , hp64k_txd_w));
MCFG_I8251_DTR_HANDLER(WRITELINE(hp64k_state , hp64k_dtr_w));
MCFG_I8251_RTS_HANDLER(WRITELINE(hp64k_state , hp64k_rts_w));
MACHINE_CONFIG_END
ROM_START(hp64k)