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author fulivi <fulivi@users.noreply.github.com>2015-08-11 15:34:55 +0200
committer fulivi <fulivi@users.noreply.github.com>2015-08-17 10:40:01 +0200
commit79e87536d53e846447a030a25749f18d18e08daa (patch)
treebfc947fe765aff273d4b9d8d08ce23037f86ef37 /src
parent8678562f7ec1335b0d2eeb58c38cd2e3785ff24c (diff)
hp64k: UART & loopback relay added
Diffstat (limited to 'src')
-rw-r--r--src/mess/drivers/hp64k.c65
1 files changed, 62 insertions, 3 deletions
diff --git a/src/mess/drivers/hp64k.c b/src/mess/drivers/hp64k.c
index fc992e77600..80f48ae7ea4 100644
--- a/src/mess/drivers/hp64k.c
+++ b/src/mess/drivers/hp64k.c
@@ -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)