1 // license:BSD-3-Clause
2 // copyright-holders:Ryan Holtz
3 /***********************************************************************
4
5 Philips SAA1043 Universal Sync Generator
6
7 TOOD:
8 - Everything.
9
10 ***********************************************************************/
11
12 #include "emu.h"
13 #include "saa1043.h"
14
15 #include <algorithm>
16
17
18 DEFINE_DEVICE_TYPE(SAA1043, saa1043_device, "saa1043", "Philips SAA1043")
19
20 /*static*/ const uint32_t saa1043_device::s_line_counts[4] = { 624, 624, 524, 524 };
21
saa1043_device(const machine_config & mconfig,const char * tag,device_t * owner,uint32_t clock)22 saa1043_device::saa1043_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
23 : device_t(mconfig, SAA1043, tag, owner, clock)
24 , m_outputs(*this)
25 , m_type(PAL)
26 {
27 std::fill(std::begin(m_outputs_hooked), std::end(m_outputs_hooked), false);
28 }
29
device_start()30 void saa1043_device::device_start()
31 {
32 m_h = attotime::from_ticks(320, clock() * 2);
33 m_line_count = s_line_counts[m_type];
34
35 // resolve callbacks
36 for (uint32_t i = 0; i < OUT_COUNT; i++)
37 {
38 m_outputs[i].resolve_safe();
39 if (m_outputs_hooked[i])
40 {
41 m_timers[i] = timer_alloc(i);
42 switch(i)
43 {
44 case V2:
45 m_timers[V2]->adjust(m_h * 6, 1);
46 break;
47 default:
48 // Not yet implemented
49 break;
50 }
51 }
52 }
53 }
54
device_reset()55 void saa1043_device::device_reset()
56 {
57 // Clear any existing clock states
58 for (uint32_t i = 0; i < OUT_COUNT; i++)
59 {
60 m_outputs[i](CLEAR_LINE);
61 }
62 m_outputs[V2](ASSERT_LINE);
63 }
64
device_timer(emu_timer & timer,device_timer_id id,int param,void * ptr)65 void saa1043_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
66 {
67 switch (id)
68 {
69 case V2:
70 m_outputs[V2](1 - param);
71 if (param)
72 m_timers[V2]->adjust(m_h * (m_line_count - 9), 0);
73 else
74 m_timers[V2]->adjust(m_h * 9, 1);
75 break;
76
77 default:
78 // Not yet implemented
79 break;
80 }
81 }
82