mirror of https://github.com/cc65/cc65.git
96 lines
3.0 KiB
C
96 lines
3.0 KiB
C
/*****************************************************************************/
|
|
/* */
|
|
/* Watara Supervision sample C program */
|
|
/* */
|
|
/* Fabrizio Caruso (fabrizio_caruso@hotmail.com), 2019 */
|
|
/* Greg King (greg.king5@verizon.net), 2021 */
|
|
/* */
|
|
/*****************************************************************************/
|
|
|
|
#include <supervision.h>
|
|
#include <string.h>
|
|
|
|
/* Number of words per screen line (Remark: Last 4 words aren't displayed) */
|
|
#define WORDS_PER_LINE (160/8+4)
|
|
|
|
struct sv_vram {
|
|
unsigned int v[160/8][8][WORDS_PER_LINE];
|
|
};
|
|
#define SV_VRAM ((*(struct sv_vram *)0x4000).v)
|
|
|
|
/* Character definitions in 8x8 format */
|
|
/* That format gives us a screen of 20 columns and 20 rows */
|
|
static const unsigned char h_char[] = {0x66,0x66,0x66,0x7E,0x66,0x66,0x66,0x00};
|
|
static const unsigned char e_char[] = {0x7E,0x60,0x60,0x78,0x60,0x60,0x7E,0x00};
|
|
static const unsigned char l_char[] = {0x60,0x60,0x60,0x60,0x60,0x60,0x7E,0x00};
|
|
static const unsigned char o_char[] = {0x3C,0x66,0x66,0x66,0x66,0x66,0x3C,0x00};
|
|
static const unsigned char w_char[] = {0x63,0x63,0x63,0x6B,0x7F,0x77,0x63,0x00};
|
|
static const unsigned char r_char[] = {0x7C,0x66,0x66,0x7C,0x78,0x6C,0x66,0x00};
|
|
static const unsigned char d_char[] = {0x78,0x6C,0x66,0x66,0x66,0x6C,0x78,0x00};
|
|
|
|
static void clear_screen(void)
|
|
{
|
|
memset(SV_VIDEO, 0, 0x2000);
|
|
}
|
|
|
|
/* Necessary conversion to have 2 bits per pixel with darkest hue */
|
|
/* Remark: The Supervision uses 2 bits per pixel, and bits are mapped into pixels in reversed order */
|
|
static unsigned int __fastcall__ double_reversed_bits(unsigned char)
|
|
{
|
|
__asm__("stz ptr2");
|
|
__asm__("stz ptr2+1");
|
|
__asm__("ldy #$08");
|
|
L1: __asm__("lsr a");
|
|
__asm__("php");
|
|
__asm__("rol ptr2");
|
|
__asm__("rol ptr2+1");
|
|
__asm__("plp");
|
|
__asm__("rol ptr2");
|
|
__asm__("rol ptr2+1");
|
|
__asm__("dey");
|
|
__asm__("bne %g", L1);
|
|
__asm__("lda ptr2");
|
|
__asm__("ldx ptr2+1");
|
|
return __AX__;
|
|
}
|
|
|
|
static void display_char(const unsigned char x, const unsigned char y, const unsigned char *ch)
|
|
{
|
|
unsigned char k;
|
|
|
|
for(k=0;k<8;++k)
|
|
{
|
|
SV_VRAM[y][k][x] = double_reversed_bits(ch[k]);
|
|
}
|
|
}
|
|
|
|
static void init_lcd(void)
|
|
{
|
|
SV_LCD.width = 160;
|
|
SV_LCD.height = 160;
|
|
}
|
|
|
|
static void hello(unsigned char x, unsigned char y)
|
|
{
|
|
display_char(x+ 0,y,h_char);
|
|
display_char(x+ 1,y,e_char);
|
|
display_char(x+ 2,y,l_char);
|
|
display_char(x+ 3,y,l_char);
|
|
display_char(x+ 4,y,o_char);
|
|
|
|
display_char(x+ 6,y,w_char);
|
|
display_char(x+ 7,y,o_char);
|
|
display_char(x+ 8,y,r_char);
|
|
display_char(x+ 9,y,l_char);
|
|
display_char(x+10,y,d_char);
|
|
}
|
|
|
|
void main(void)
|
|
{
|
|
init_lcd();
|
|
clear_screen();
|
|
|
|
hello(2,3);
|
|
hello(7,16);
|
|
}
|