// license:BSD-3-Clause
// copyright-holders:Sven Schnelle
#ifndef MAME_VIDEO_TOPCAT_H
#define MAME_VIDEO_TOPCAT_H
#pragma once
class topcat_device : public device_t
{
public:
topcat_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
bool has_changed() { bool ret = m_changed; m_changed = false; return ret; }
void set_fb_width(int _pixels) { m_fb_width = _pixels; }
void set_fb_height(int _pixels) { m_fb_height = _pixels; }
void set_planemask(int _mask) { m_plane_mask = _mask; }
void get_cursor_pos(int &startx, int &starty, int &endx, int &endy);
uint16_t vram_r(offs_t offset, uint16_t mem_mask = ~0);
void vram_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
uint16_t ctrl_r(address_space &space, offs_t offset, uint16_t mem_mask = ~0);
void ctrl_w(address_space &space, offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
void vblank_w(int state);
void topcat_mem(address_map &map);
bool plane_enabled();
auto irq_out_cb() { return m_int_write_func.bind(); }
protected:
topcat_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
virtual void device_start() override;
virtual void device_reset() override;
TIMER_CALLBACK_MEMBER(cursor_callback);
private:
typedef enum {
TOPCAT_REPLACE_RULE_CLEAR, /* 0 */
TOPCAT_REPLACE_RULE_SRC_AND_DST,
TOPCAT_REPLACE_RULE_SRC_AND_NOT_DST,
TOPCAT_REPLACE_RULE_SRC,
TOPCAT_REPLACE_RULE_NOT_SRC_AND_DST,
TOPCAT_REPLACE_RULE_NOP,
TOPCAT_REPLACE_RULE_SRC_XOR_DST,
TOPCAT_REPLACE_RULE_SRC_OR_DST,
TOPCAT_REPLACE_RULE_NOT_SRC_AND_NOT_DST,
TOPCAT_REPLACE_RULE_NOT_SRC_XOR_DST,
TOPCAT_REPLACE_RULE_NOT_DST,
TOPCAT_REPLACE_RULE_SRC_OR_NOT_DST,
TOPCAT_REPLACE_RULE_NOT_SRC,
TOPCAT_REPLACE_RULE_NOT_SRC_OR_DST,
TOPCAT_REPLACE_RULE_NOT_SRC_OR_NOT_DST,
TOPCAT_REPLACE_RULE_SET,
} replacement_rule_t;
enum topcat_reg {
TOPCAT_REG_VBLANK=0x20,
TOPCAT_REG_WMOVE_ACTIVE=0x22,
TOPCAT_REG_VERT_RETRACE_INTRQ=0x24,
TOPCAT_REG_WMOVE_INTRQ=0x26,
TOPCAT_REG_DISPLAY_PLANE_ENABLE=0x40,
TOPCAT_REG_WRITE_ENABLE_PLANE=0x44,
TOPCAT_REG_READ_ENABLE_PLANE=0x46,
TOPCAT_REG_FB_WRITE_ENABLE=0x48,
TOPCAT_REG_WMOVE_IE=0x4a,
TOPCAT_REG_VBLANK_IE=0x4c,
TOPCAT_REG_START_WMOVE=0x4e,
TOPCAT_REG_ENABLE_BLINK_PLANES=0x50,
TOPCAT_REG_ENABLE_ALT_FRAME=0x54,
TOPCAT_REG_CURSOR_PLANE_ENABLE=0x56,
TOPCAT_REG_PIXEL_REPLACE_RULE=0x75,
TOPCAT_REG_MOVE_REPLACE_RULE=0x77,
TOPCAT_REG_SOURCE_X_PIXEL=0x79,
TOPCAT_REG_SOURCE_Y_PIXEL=0x7b,
TOPCAT_REG_DST_X_PIXEL=0x7d,
TOPCAT_REG_DST_Y_PIXEL=0x7f,
TOPCAT_REG_BLOCK_MOVER_PIXEL_WIDTH=0x81,
TOPCAT_REG_BLOCK_MOVER_PIXEL_HEIGHT=0x83,
TOPCAT_REG_CURSOR_X_POS=0x85,
TOPCAT_REG_CURSOR_Y_POS=0x87,
TOPCAT_REG_CURSOR_WIDTH=0x89,
};
void window_move();
void execute_rule(bool src, replacement_rule_t rule, bool &dst);
void update_cursor(int x, int y, uint16_t ctrl, uint8_t width);
void modify_vram(int x, int y, bool state) {
if (state)
m_vram[y * m_fb_width + x] |= m_plane_mask;
else
m_vram[y * m_fb_width + x] &= ~m_plane_mask;
}
void modify_vram_offset(int offset, bool state) {
if (state)
m_vram[offset] |= m_plane_mask;
else
m_vram[offset] &= ~m_plane_mask;
}
bool get_vram_pixel(int x, int y) const {
return m_vram[y * m_fb_width + x] & m_plane_mask;
}
void update_int();
devcb_write_line m_int_write_func;
uint16_t m_vblank = 0;
uint8_t m_wmove_active = 0;
uint16_t m_vert_retrace_intrq = 0;
uint16_t m_wmove_intrq = 0;
uint16_t m_display_enable_planes = 0;
uint16_t m_fb_write_enable = 0;
uint16_t m_enable_blink_planes = 0;
uint16_t m_enable_alt_frame = 0;
uint16_t m_cursor_plane_enable = 0;
uint16_t m_move_replacement_rule = 0;
uint16_t m_pixel_replacement_rule = 0;
uint16_t m_source_x_pixel = 0;
uint16_t m_source_y_pixel = 0;
uint16_t m_dst_x_pixel = 0;
uint16_t m_dst_y_pixel = 0;
uint16_t m_block_mover_pixel_width = 0;
uint16_t m_block_mover_pixel_height = 0;
uint16_t m_unknown_reg4a = 0;
uint16_t m_unknown_reg4c = 0;
emu_timer *m_cursor_timer = nullptr;
bool m_cursor_state = false;
uint16_t m_cursor_x_pos = 0;
uint16_t m_cursor_y_pos = 0;
uint16_t m_cursor_width = 0;
int m_fb_width = 0;
int m_fb_height = 0;
uint8_t m_plane_mask = 0;
bool m_read_enable = false;
bool m_write_enable = false;
bool m_fb_enable = false;
bool m_changed = false;
required_shared_ptr<uint8_t> m_vram;
};
DECLARE_DEVICE_TYPE(TOPCAT, topcat_device)
#endif // MAME_VIDEO_TOPCAT_H