// license:BSD-3-Clause
// copyright-holders:David Viens
/***************************************************************************
gic.h
GI AY-3-8800-1 (Datasheet exists as AY-3-8500-1 Graphics Interface Chip)
For the GIMINI "Challenger" programmable game system.
Really only ever used in the Unisonic Champion 2711
***************************************************************************/
#ifndef MAME_VIDEO_GIC_H
#define MAME_VIDEO_GIC_H
#pragma once
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_GIC_ADD(tag, clock, screen_tag, ram_cb) \
MCFG_DEVICE_ADD(tag, GIC, clock) \
MCFG_VIDEO_SET_SCREEN(screen_tag) \
downcast<gic_device &>(*device).set_ram(DEVCB_##ram_cb);
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
// ======================> gic_device
//Palette entries
#define GIC_BLACK 0
#define GIC_RED 1
#define GIC_GREEN 2
#define GIC_WHITE 3
#define GIC_CHAR_W 6
#define GIC_CHAR_H 8
#define GIC_LEFT_H 12
#define GIC_LEFT_W 6
#define GIC_RIGHT_H 6
#define GIC_RIGHT_W 13
class gic_device : public device_t
, public device_sound_interface
, public device_video_interface
{
public:
// construction/destruction
gic_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// configuration helpers
template <typename Obj> void set_ram(Obj &&cb) { m_ram.set_callback(std::forward<Obj>(cb)); }
DECLARE_PALETTE_INIT(gic);
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
inline bitmap_ind16 *get_bitmap() { return &m_bitmap; }
// Global constants (non measured figures)
static constexpr int START_ACTIVE_SCAN = 10;
static constexpr int BORDER_SIZE = GIC_CHAR_W*3;
static constexpr int END_ACTIVE_SCAN = 10 + GIC_CHAR_W*2 + 150 + GIC_CHAR_W*2;
static constexpr int START_Y = 1;
static constexpr int SCREEN_HEIGHT = GIC_CHAR_H*(GIC_LEFT_H+2);
static constexpr int LINE_CLOCKS = 455;
static constexpr int LINES = 262;
protected:
gic_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
// 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;
// optional information overrides
virtual const tiny_rom_entry *device_rom_region() const override;
// device_sound_interface overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
/* timers */
static const device_timer_id TIMER_VBLANK = 0;
void draw_char_left (int x, int y, uint8_t code, bitmap_ind16 &bitmap);
void draw_char_right(int x, int y, uint8_t code, bitmap_ind16 &bitmap,int bg_col);
bitmap_ind16 m_bitmap;
required_region_ptr<uint8_t> m_cgrom; // internal chargen ROM
emu_timer *m_vblank_timer;
sound_stream *m_stream;
int m_audiocnt;
int m_audioval;
int m_audioreset;
devcb_read8 m_ram;
};
// device type definition
DECLARE_DEVICE_TYPE(GIC, gic_device)
#endif // MAME_VIDEO_GIC_H