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https://github.com/cc65/cc65.git
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64 lines
1.7 KiB
C
Executable File
64 lines
1.7 KiB
C
Executable File
#include <supervision.h>
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#include <peekpoke.h>
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#define SV_OFFSET 0x0A
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#define SV_INIT_POSITION (SV_VIDEO+0x0A*48+0x0A)
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unsigned char h_char[] = {0x66,0x66,0x66,0x7e,0x66,0x66,0x66,0x00};
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unsigned char e_char[] = {0x7e,0x60,0x60,0x78,0x60,0x60,0x7e,0x00};
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unsigned char l_char[] = {0x60,0x60,0x60,0x60,0x60,0x60,0x7e,0x00};
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unsigned char o_char[] = {0x3c,0x66,0x66,0x66,0x66,0x66,0x3c,0x00};
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unsigned char w_char[] = {0x63,0x63,0x63,0x6b,0x7f,0x77,0x63,0x00};
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unsigned char r_char[] = {0x7c,0x66,0x66,0x7c,0x78,0x6c,0x66,0x00};
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unsigned char d_char[] = {0x78,0x6c,0x66,0x66,0x66,0x6c,0x78,0x00};
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void clear_screen(void)
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{
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unsigned short i;
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for(i=0;i<0x2000;++i)
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{
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POKE(SV_VIDEO+i,0);
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}
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}
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unsigned char bit_reverse_lookup[16] =
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{
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0x0, 0x8, 0x4, 0xC, 0x2, 0xA, 0x6, 0xE,
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0x1, 0x9, 0x5, 0xD, 0x3, 0xB, 0x7, 0xF
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};
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unsigned char bit_reverse(unsigned char n)
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{
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return (bit_reverse_lookup[n&0b1111] << 4) | bit_reverse_lookup[n>>4];
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}
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int main()
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{
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unsigned char i;
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clear_screen();
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for(i=0;i<8;++i)
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{
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POKE(SV_INIT_POSITION+1 +i*48,bit_reverse(h_char[i]));
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POKE(SV_INIT_POSITION+2 +i*48,bit_reverse(e_char[i]));
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POKE(SV_INIT_POSITION+3 +i*48,bit_reverse(l_char[i]));
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POKE(SV_INIT_POSITION+4 +i*48,bit_reverse(l_char[i]));
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POKE(SV_INIT_POSITION+5 +i*48,bit_reverse(o_char[i]));
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POKE(SV_INIT_POSITION+7 +i*48,bit_reverse(w_char[i]));
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POKE(SV_INIT_POSITION+8 +i*48,bit_reverse(o_char[i]));
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POKE(SV_INIT_POSITION+9 +i*48,bit_reverse(r_char[i]));
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POKE(SV_INIT_POSITION+10+i*48,bit_reverse(l_char[i]));
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POKE(SV_INIT_POSITION+11+i*48,bit_reverse(d_char[i]));
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}
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while(1) {};
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return 0;
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}
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