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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
VideoBrain UV201/UV202 video chip emulation
**********************************************************************
_____ _____
GND 1 |* \_/ | 40 DMAREQ
G 2 | | 39 /CE
I 3 | | 38 RESET
B 4 | | 37 BISTROBE
R 5 | | 36 UMIREQ0
BA0 6 | | 35 BRCLK
BA1 7 | | 34 HBLANK
BA2 8 | | 33 VBLANK
BA3 9 | | 32 R/W
BA4 10 | UV201 | 31 keypad column 8
BA5 11 | | 30 EXT INT
BA6 12 | | 29 FIELD
BA7 13 | | 28 BD7
BA8 14 | | 27 BD6
BA9 15 | | 26 BD5
BA10 16 | | 25 BD4
BA11 17 | | 24 BD3
BA12 18 | | 23 BD2
+5V 19 | | 22 BD1
+12V 20 |_____________| 21 BD0
_____ _____
UMIREQ1 1 |* \_/ | 40 BISTROBE
UMIREQ0 2 | | 39 CPUREQ1
CPUREQ0 3 | | 38 GND
XIN 4 | | 37 /800-BFF
XOUT 5 | | 36 RST
DMAREQ0 6 | | 35 DMAREQ1
CPU CLK 7 | | 34 COLCLK
WACK 8 | | 33 BRCLK
D0 9 | | 32 D7
BD0 10 | UV202 | 31 BD7
D1 11 | | 30 D6
BD1 12 | | 29 BD6
D2 13 | | 28 D5
BD2 14 | | 27 BD5
D3 15 | | 26 D4
BD3 16 | | 25 BD4
HBLANK 17 | | 24 FIELD
VBLANK 18 | | 23 SCANLINE
BURST 19 | | 22 +12V
CSYNCH 20 |_____________| 21 +5V
**********************************************************************/
#ifndef MAME_VIDEO_UV201_H
#define MAME_VIDEO_UV201_H
#pragma once
#include "screen.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> uv201_device
class uv201_device : public device_t,
public device_video_interface
{
public:
// construction/destruction
uv201_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto ext_int_wr_callback() { return m_write_ext_int.bind(); }
auto hblank_wr_callback() { return m_write_hblank.bind(); }
auto db_rd_callback() { return m_read_db.bind(); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
DECLARE_WRITE_LINE_MEMBER( ext_int_w );
DECLARE_READ_LINE_MEMBER( kbd_r );
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
private:
enum
{
TIMER_Y_ODD,
TIMER_Y_EVEN,
TIMER_HBLANK_ON,
TIMER_HBLANK_OFF
};
void initialize_palette();
int get_field_vpos();
int get_field();
void set_y_interrupt();
void do_partial_update();
devcb_write_line m_write_ext_int;
devcb_write_line m_write_hblank;
devcb_read8 m_read_db;
rgb_t m_palette_val[32];
uint8_t m_ram[0x90];
uint8_t m_y_int;
uint8_t m_fmod;
uint8_t m_bg;
uint8_t m_cmd;
uint8_t m_freeze_x;
uint16_t m_freeze_y;
int m_field;
// timers
emu_timer *m_timer_y_odd;
emu_timer *m_timer_y_even;
emu_timer *m_timer_hblank_on;
emu_timer *m_timer_hblank_off;
};
// device type definition
DECLARE_DEVICE_TYPE(UV201, uv201_device)
#endif // MAME_VIDEO_UV201_H
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