blob: 5e7eca7f8fc8cf5ea0209380039213fc1c37cda1 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
RCA CDP1861 Video Display Controller emulation
**********************************************************************
_____ _____
_CLK 1 |* \_/ | 24 Vdd
_DMAO 2 | | 23 _CLEAR
_INT 3 | | 22 SC1
TPA 4 | | 21 SC0
TPB 5 | | 20 DI7
_COMP SYNC 6 | CDP1861 | 19 DI6
VIDEO 7 | | 18 DI5
_RESET 8 | | 17 DI4
_EFX 9 | | 16 DI3
DISP ON 10 | | 15 DI2
DISP OFF 11 | | 14 DI1
Vss 12 |_____________| 13 DI0
**********************************************************************/
#ifndef MAME_VIDEO_CDP1861_H
#define MAME_VIDEO_CDP1861_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> cdp1861_device
class cdp1861_device : public device_t,
public device_video_interface
{
public:
static constexpr unsigned VISIBLE_COLUMNS = 64;
static constexpr unsigned VISIBLE_LINES = 128;
static constexpr unsigned HBLANK_START = 14 * 8;
static constexpr unsigned HBLANK_END = 12;
static constexpr unsigned HSYNC_START = 0;
static constexpr unsigned HSYNC_END = 12;
static constexpr unsigned SCREEN_WIDTH = 14 * 8;
static constexpr unsigned TOTAL_SCANLINES = 262;
static constexpr unsigned SCANLINE_DISPLAY_START = 80;
static constexpr unsigned SCANLINE_DISPLAY_END = 208;
static constexpr unsigned SCANLINE_VBLANK_START = 262;
static constexpr unsigned SCANLINE_VBLANK_END = 16;
static constexpr unsigned SCANLINE_VSYNC_START = 16;
static constexpr unsigned SCANLINE_VSYNC_END = 0;
static constexpr unsigned SCANLINE_INT_START = SCANLINE_DISPLAY_START - 2;
static constexpr unsigned SCANLINE_INT_END = SCANLINE_DISPLAY_START;
static constexpr unsigned SCANLINE_EFX_TOP_START = SCANLINE_DISPLAY_START - 4;
static constexpr unsigned SCANLINE_EFX_TOP_END = SCANLINE_DISPLAY_START;
static constexpr unsigned SCANLINE_EFX_BOTTOM_START = SCANLINE_DISPLAY_END - 4;
static constexpr unsigned SCANLINE_EFX_BOTTOM_END = SCANLINE_DISPLAY_END;
// construction/destruction
cdp1861_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto int_cb() { return m_write_int.bind(); }
auto dma_out_cb() { return m_write_dma_out.bind(); }
auto efx_cb() { return m_write_efx.bind(); }
void dma_w(uint8_t data);
void disp_on_w(int state);
void disp_off_w(int state);
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
bitmap_rgb32 m_bitmap;
protected:
// device-level overrides
virtual void device_config_complete() override;
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param) override;
private:
enum
{
TIMER_INT,
TIMER_EFX,
TIMER_DMA
};
devcb_write_line m_write_int;
devcb_write_line m_write_dma_out;
devcb_write_line m_write_efx;
int m_disp; // display enabled
int m_dispon; // display on latch
int m_dispoff; // display off latch
int m_dmaout; // DMA request active
// timers
emu_timer *m_int_timer; // interrupt timer
emu_timer *m_efx_timer; // EFx timer
emu_timer *m_dma_timer; // DMA timer
};
// device type definition
DECLARE_DEVICE_TYPE(CDP1861, cdp1861_device)
#endif // MAME_VIDEO_CDP1861_H
|