2019-08-06 22:52:52 +00:00
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#ifndef _CV_COMMON_H
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#define _CV_COMMON_H
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/* VRAM map
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2019-08-07 13:26:53 +00:00
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0x0000 - 0x3fff character pattern table
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0x3000 - 0x36ff image table
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2019-08-06 22:52:52 +00:00
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0x3c00 - 0x3fff sprite attribute table
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*/
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#define PATTERN ((const cv_vmemp)0x0000)
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2019-08-07 13:26:53 +00:00
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#define IMAGE ((const cv_vmemp)0x3000)
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2019-08-06 22:52:52 +00:00
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#define SPRITES ((const cv_vmemp)0x3c00)
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#define COLS 32
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2019-08-07 13:26:53 +00:00
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#define ROWS 28
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2019-08-06 22:52:52 +00:00
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typedef unsigned char byte;
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typedef signed char sbyte;
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typedef unsigned short word;
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#ifndef CV_SMS
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uintptr_t __at(0x6a) font_bitmap_a;
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uintptr_t __at(0x6c) font_bitmap_0;
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#else
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extern char font_bitmap_a[];
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extern char font_bitmap_0[];
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#endif
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#define COLOR_FGBG(fg,bg) (((fg)<<4)|(bg))
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#define COLOR_FG(fg) (((fg)<<4))
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#define LOCHAR 0x20
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#define HICHAR 0xff
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#define CHAR(ch) (ch-LOCHAR)
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#define wait_vsync() __asm__("halt")
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extern volatile uint_fast8_t vint_counter;
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extern void vint_handler(void);
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extern byte reverse_bits(byte n);
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extern void flip_sprite_patterns(word dest, const byte* patterns, word len);
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extern char cursor_x;
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extern char cursor_y;
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extern void clrscr();
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extern word getimageaddr(byte x, byte y);
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extern byte getchar(byte x, byte y);
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extern void putchar(byte x, byte y, byte attr);
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extern void putstring(byte x, byte y, const char* string);
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extern void delay(byte i);
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extern byte rndint(byte a, byte b);
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extern void memset_safe(void* _dest, char ch, word size);
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extern char in_rect(byte x, byte y, byte x0, byte y0, byte w, byte h);
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// print 4-digit BCD value
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extern void draw_bcd_word(byte x, byte y, word bcd);
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// add two 16-bit BCD values
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extern word bcd_add(word a, word b);
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extern void vdp_setup();
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extern void set_shifted_pattern(const byte* src, word dest, byte shift);
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#endif
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