// license:BSD-3-Clause
// copyright-holders:Sean Young, Nathan Woods, Aaron Giles, Wilbert Pol, hap
/*
** File: tms9928a.h -- software implementation of the TMS9928A VDP.
**
** By Sean Young 1999 (sean@msxnet.org).
*/
/*
Model Video Hz
TMS9918 NTSC 60
TMS9929? YPbPr? 50 (not sure. 50Hz non-A model, used in Creativision? or was it a 3rd party clone chip?)
TMS9918A NTSC 60
TMS9928A YPbPr 60
TMS9929A YPbPr 50
TMS9118 NTSC 60
TMS9128 YPbPr 60
TMS9129 YPbPr 50
EFO90501 ? 50? (uses 10.816 MHz XTAL; TI logo sometimes present)
XTAL inputs 10.738098 to 10.739172 MHz (10.738635 MHz typical)
Pixel clock (internal) XTAL ÷ 2
CPUCLK (N/A with TMS992x) XTAL ÷ 3 (3.58 MHz typical)
GROMCLK XTAL ÷ 24 (447.5 kHz typical)
*/
#ifndef MAME_VIDEO_TMS9928A_H
#define MAME_VIDEO_TMS9928A_H
#pragma once
#include "screen.h"
DECLARE_DEVICE_TYPE(TMS9918, tms9918_device)
DECLARE_DEVICE_TYPE(TMS9918A, tms9918a_device)
DECLARE_DEVICE_TYPE(TMS9118, tms9118_device)
DECLARE_DEVICE_TYPE(TMS9928A, tms9928a_device)
DECLARE_DEVICE_TYPE(TMS9128, tms9128_device)
DECLARE_DEVICE_TYPE(TMS9929, tms9929_device)
DECLARE_DEVICE_TYPE(TMS9929A, tms9929a_device)
DECLARE_DEVICE_TYPE(TMS9129, tms9129_device)
DECLARE_DEVICE_TYPE(EFO90501, efo90501_device)
class tms9928a_device : public device_t,
public device_memory_interface,
public device_palette_interface,
public device_video_interface
{
public:
static constexpr unsigned PALETTE_SIZE = 16;
/* Some defines used in defining the screens */
static constexpr unsigned TOTAL_HORZ = 342;
static constexpr unsigned TOTAL_VERT_NTSC = 262;
static constexpr unsigned TOTAL_VERT_PAL = 313;
static constexpr unsigned HORZ_DISPLAY_START = 2 + 14 + 8 + 13;
static constexpr unsigned VERT_DISPLAY_START_PAL = 13 + 51;
static constexpr unsigned VERT_DISPLAY_START_NTSC = 13 + 27;
// construction/destruction
tms9928a_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
void set_vram_size(int vram_size) { m_vram_size = vram_size; }
auto int_callback() { return m_out_int_line_cb.bind(); }
auto gromclk_callback() { return m_out_gromclk_cb.bind(); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
u8 vram_read();
void vram_write(u8 data);
u8 register_read();
void register_write(u8 data);
/* update the screen */
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
bitmap_rgb32 &get_bitmap() { return m_tmpbmp; }
/* RESET pin */
void reset_line(int state) { if (state==ASSERT_LINE) device_reset(); }
protected:
tms9928a_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, uint16_t horz_total, bool is_50hz, bool is_reva, bool is_99);
// 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, void *ptr) override;
// device_memory_interface overrides
virtual space_config_vector memory_space_config() const override;
// device_palette_interface overrides
virtual uint32_t palette_entries() const override { return 16; }
private:
void change_register(uint8_t reg, uint8_t val);
void check_interrupt();
void update_backdrop();
void update_table_masks();
void set_palette();
void memmap(address_map &map);
static const device_timer_id TIMER_LINE = 0;
static const device_timer_id GROMCLK = 1;
int m_vram_size; /* 4K, 8K, or 16K. This should be replaced by fetching data from an address space? */
devcb_write_line m_out_int_line_cb; /* Callback is called whenever the state of the INT output changes */
devcb_write_line m_out_gromclk_cb; // GROMCLK line is optional; if present, pulse it by XTAL/24 rate
/* TMS9928A internal settings */
uint8_t m_ReadAhead;
uint8_t m_Regs[8];
uint8_t m_StatusReg;
uint8_t m_FifthSprite;
uint8_t m_latch;
uint8_t m_INT;
uint16_t m_Addr;
uint16_t m_colour;
uint16_t m_pattern;
uint16_t m_nametbl;
uint16_t m_spriteattribute;
uint16_t m_spritepattern;
int m_colourmask;
int m_patternmask;
const uint16_t m_total_horz;
const bool m_50hz;
const bool m_reva;
const bool m_99;
/* memory */
const address_space_config m_space_config;
address_space* m_vram_space;
bitmap_rgb32 m_tmpbmp;
emu_timer *m_line_timer;
emu_timer *m_gromclk_timer;
uint8_t m_mode;
/* emulation settings */
int m_top_border;
int m_vertical_size;
};
class tms9918_device : public tms9928a_device
{
public:
tms9918_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class tms9918a_device : public tms9928a_device
{
public:
tms9918a_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class tms9118_device : public tms9928a_device
{
public:
tms9118_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class tms9128_device : public tms9928a_device
{
public:
tms9128_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class tms9929_device : public tms9928a_device
{
public:
tms9929_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class tms9929a_device : public tms9928a_device
{
public:
tms9929a_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class tms9129_device : public tms9928a_device
{
public:
tms9129_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
class efo90501_device : public tms9928a_device
{
public:
efo90501_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
#endif // MAME_VIDEO_TMS9928A_H