PC9821でLINUXをはじめよう！

PC9821でLINUXをはじ� ..

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18:ペンギコ
 01/10/13 12:06 Yt8VfpN.
 
void switch_clgd_98(){ 
clgd_wait(28); 
outb(0x00,0x0ca3);      /* 3C3 Sleep                    */ 
outb(0x00,0x0904);      /* access POS102 unmask         */ 
outb(0x00,0xff82);      /* switch POS102 ON             */ 
outb(0x20,0x0904);      /* access POS102 mask           */ 
outb(0x03,0x0faa);      /* index                        */ 
outb(0x00,0x0fab);      /* switch gd54xx to 98          */ 
clgd_wait(20); 
outb(0x02,0x0faa);      /* index                        */ 
outb(0x00,0x0fab);      /* Linear Address OFF           */ 
outb(0x07,0x6a);        /* unmask                       */ 
outb(0x8e,0x6a);        /* vram to 98                   */ 
outb(0x06,0x6a);        /* mask                         */ 
outb(0x0f,0x68);        /* enable 98 disply             */ 
}

19:ペンギコ
 01/10/13 12:09 Yt8VfpN.
 
u32* clgd_mmap(u32 size, u32 addr, int fd){ 
 return (u32*)mmap((caddr_t)0, size, 
        PROT_READ|PROT_WRITE, MAP_SHARED, fd, (off_t)addr); 
} 
 
int main(void) { 
int     fd; 
u32     i, *gc, *t_mem, *a_mem, *g_mem; 
 
if((fd = open("/dev/mem",O_RDWR))<0){ printf("error:open\n"); exit(1); } 
g_mem = clgd_mmap(0x00100000,0x0f000000,fd); 
t_mem = clgd_mmap(0x00004000,0x000a0000,fd); 
a_mem = clgd_mmap(0x00004000,0x000a2000,fd); 
close(fd); 
iopl(3); 
switch_98_clgd(); 
keyin(); 
gc= g_mem; i= 0x40000; while(i--){ *gc++ = 0x0c0c0c0c; } 
switch_clgd_98(); 
gc= a_mem; i= 0x00800; while(i--){ *gc++ = 0x00000000; } 
gc= t_mem; 
 
i= 0x00800; while(i--){ *gc++ = 0x00000000; } 
return 0; 
}

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