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r24031 Monday 1st July, 2013 at 13:56:21 UTC by Carl
diserial: simplify (nw) ins8250: use clock-div rate setting for more precision (nw)

[src/emu]	diserial.c diserial.h
[src/emu/machine]	ins8250.c ins8250.h

trunk/src/emu/machine/ins8250.c

r24030	r24031
190	190	update_interrupt();
191	191	}
192	192
193		void ins8250_uart_device::update_clock()
194		{
195		int baud;
196		if(m_regs.dl == 0)
197		{
198		set_tra_rate(0);
199		set_rcv_rate(0);
200		return;
201		}
202		baud = clock()/(m_regs.dl*16);
203		set_tra_rate(baud);
204		set_rcv_rate(baud);
205		}
206
207	193	WRITE8_MEMBER( ins8250_uart_device::ins8250_w )
208	194	{
209	195	int tmp;
r24030	r24031
214	200	if (m_regs.lcr & 0x80)
215	201	{
216	202	m_regs.dl = (m_regs.dl & 0xff00) | data;
217		update_clock();
	203	set_rate(clock(), m_regs.dl*16);
218	204	}
219	205	else
220	206	{
r24030	r24031
240	226	if (m_regs.lcr & 0x80)
241	227	{
242	228	m_regs.dl = (m_regs.dl & 0xff) | (data << 8);
243		update_clock();
	229	set_rate(clock(), m_regs.dl*16);
244	230	}
245	231	else
246	232	{

trunk/src/emu/machine/ins8250.h

r24030	r24031
84	84	devcb_resolved_write_line   m_out_out2_func;
85	85
86	86	void update_interrupt();
87		void update_clock();
88	87	void update_msr(int bit, UINT8 state);
89	88	};
90	89

trunk/src/emu/diserial.c

r24030	r24031
65	65	m_tra_clock = device().machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(device_serial_interface::tra_timer), this));
66	66	}
67	67
68		void device_serial_interface::set_rcv_rate(int baud)
69		{
70		m_rcv_rate = baud ? attotime::from_hz(baud) : attotime::never;
71		receive_register_reset();
72		m_rcv_clock->adjust(attotime::never);
73		}
74
75		void device_serial_interface::set_tra_rate(int baud)
76		{
77		m_tra_rate = baud ? attotime::from_hz(baud) : attotime::never;
78		transmit_register_reset();
79		m_tra_clock->adjust(attotime::never);
80		}
81
82	68	void device_serial_interface::set_rcv_rate(attotime rate)
83	69	{
84	70	m_rcv_rate = rate;
r24030	r24031
93	79	m_tra_clock->adjust(attotime::never);
94	80	}
95	81
96		void device_serial_interface::set_rcv_rate(UINT32 clock, int div)
97		{
98		m_rcv_rate = attotime::from_hz(clock) * div;
99		receive_register_reset();
100		m_rcv_clock->adjust(attotime::never);
101		}
102
103		void device_serial_interface::set_tra_rate(UINT32 clock, int div)
104		{
105		m_tra_rate = attotime::from_hz(clock) * div;
106		transmit_register_reset();
107		m_tra_clock->adjust(attotime::never);
108		}
109
110	82	void device_serial_interface::tra_clock()
111	83	{
112	84	tra_callback();

trunk/src/emu/diserial.h

r24030	r24031
91	91	void receive_register_update_bit(int bit);
92	92	void receive_register_extract();
93	93
94		void set_rcv_rate(attotime baud);
95		void set_tra_rate(attotime baud);
96		void set_rcv_rate(UINT32 clock, int div);
97		void set_tra_rate(UINT32 clock, int div);
98		void set_rcv_rate(int baud);
99		void set_tra_rate(int baud);
	94	void set_rcv_rate(attotime rate);
	95	void set_tra_rate(attotime rate);
	96	void set_rcv_rate(UINT32 clock, int div) { set_rcv_rate((clock && div) ? (attotime::from_hz(clock) * div) : attotime::never); }
	97	void set_tra_rate(UINT32 clock, int div) { set_tra_rate((clock && div) ? (attotime::from_hz(clock) * div) : attotime::never); }
	98	void set_rcv_rate(int baud) { set_rcv_rate(baud ? attotime::from_hz(baud) : attotime::never); }
	99	void set_tra_rate(int baud) { set_tra_rate(baud ? attotime::from_hz(baud) : attotime::never); }
	100	void set_rate(attotime rate) { set_rcv_rate(rate); set_tra_rate(rate); }
	101	void set_rate(UINT32 clock, int div) { set_rcv_rate(clock, div); set_tra_rate(clock, div); }
	102	void set_rate(int baud) { set_rcv_rate(baud); set_tra_rate(baud); }
	103
100	104	void tra_clock();
101	105	void rcv_clock();
102	106

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