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
114
115
116
117
|
// license:BSD-3-Clause
// copyright-holders:Zsolt Vasvari, Aaron Giles
/****************************************************************************
* *
* Function prototypes and constants used by the TMS34061 emulator *
* *
* Created by Zsolt Vasvari on 5/26/1998. *
* Updated by Aaron Giles on 11/21/2000. *
* *
****************************************************************************/
#ifndef MAME_VIDEO_TMS34061_H
#define MAME_VIDEO_TMS34061_H
#pragma once
// ======================> tms34061_device
class tms34061_device : public device_t, public device_video_interface
{
public:
/* display state structure */
struct tms34061_display
{
u8 blanked; /* true if blanked */
u8 *vram; /* base of VRAM */
u8 *latchram; /* base of latch RAM */
u16 *regs; /* pointer to array of registers */
offs_t dispstart; /* display start */
};
// construction/destruction
tms34061_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
void set_rowshift(u8 rowshift) { m_rowshift = rowshift; }
void set_vram_size(u32 vramsize) { m_vramsize = vramsize; }
auto int_callback() { return m_interrupt_cb.bind(); }
/* reads/writes to the 34061 */
u8 read(int col, int row, int func);
void write(int col, int row, int func, u8 data);
/* latch settings */
u8 latch_r();
void latch_w(u8 data);
/* video update handling */
void get_display_state();
bool blanked() const { return bool(m_display.blanked); }
u8 const &vram(unsigned row) const { return m_display.vram[row << m_rowshift]; }
u16 xyoffset() const { return m_display.regs[TMS34061_XYOFFSET]; }
u16 xyaddress() const { return m_display.regs[TMS34061_XYADDRESS]; }
// TODO: encapsulate this properly
tms34061_display m_display;
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
/* register constants */
enum
{
TMS34061_HORENDSYNC = 0,
TMS34061_HORENDBLNK,
TMS34061_HORSTARTBLNK,
TMS34061_HORTOTAL,
TMS34061_VERENDSYNC,
TMS34061_VERENDBLNK,
TMS34061_VERSTARTBLNK,
TMS34061_VERTOTAL,
TMS34061_DISPUPDATE,
TMS34061_DISPSTART,
TMS34061_VERINT,
TMS34061_CONTROL1,
TMS34061_CONTROL2,
TMS34061_STATUS,
TMS34061_XYOFFSET,
TMS34061_XYADDRESS,
TMS34061_DISPADDRESS,
TMS34061_VERCOUNTER,
TMS34061_REGCOUNT
};
u8 m_rowshift; /* VRAM address is (row << rowshift) | col */
u32 m_vramsize; /* size of video RAM */
devcb_write_line m_interrupt_cb; /* interrupt gen callback */
u16 m_regs[TMS34061_REGCOUNT];
u16 m_xmask;
u8 m_yshift;
u32 m_vrammask;
u8 * m_vram;
u8 * m_latchram;
u8 m_latchdata;
u8 * m_shiftreg;
emu_timer * m_timer;
std::unique_ptr<u8[]> m_vram_alloc;
std::unique_ptr<u8[]> m_latchram_alloc;
void update_interrupts();
TIMER_CALLBACK_MEMBER( interrupt );
void register_w(offs_t offset, u8 data);
u8 register_r(offs_t offset);
void adjust_xyaddress(int offset);
void xypixel_w(int offset, u8 data);
u8 xypixel_r(int offset);
};
// device type definition
DECLARE_DEVICE_TYPE(TMS34061, tms34061_device)
#endif // MAME_VIDEO_TMS34061_H
|