PC9821でLINUXをはじめよう！

PC9821でLINUXをはじ� ..

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16:ペンギコ
 01/10/13 11:58 Yt8VfpN.
void ar_index(){ 
u8 d; 
outb(0x24,0x0da4); d = inb(0x0da5); 
if(d & 0x80){   /* !!! test     al, 0x80 */ 
d = inb(0x0ca1); outb(d,0x0ca0); 
}}      
 
void hdr(){ 
u8 al;  
outb(0xff,0x0ca6);      /* Pixel Mask Reg               */ 
al = inb(0x0ca6);       /* HDR Access Step1             */ 
al = inb(0x0ca6);       /* HDR Access Step2             */ 
al = inb(0x0ca6);       /* HDR Access Step3             */ 
al = inb(0x0ca6);       /* HDR Access Step4             */ 
outb(0x20,0x0ca6);      /* HDR write                    */ 
outb(0xff,0x0ca6);      /* Pixel Mask Reg               */ 
} 
 
void clgd_wait(u32 s){__volatile__ u32 i; i=1<<s; while(i--);} 
void rotw(u32 s, u16 *r){ while(*r != 0xffff){outw(*r++,s);} } 
void rotb(u32 s, u8 *r){ while(*r != 0xff){outw(*r++,s);} }

17:ペンギコ
 01/10/13 12:04 Yt8VfpN.
 
void switch_98_clgd(){ 
outb(0x0e,0x68);        /* disable 98 mode              */ 
outb(0x07,0x6a);        /* unmask                       */ 
outb(0x8f,0x6a);        /* swtich vram to gd54xx        */ 
outb(0x06,0x6a);        /* mask                         */ 
outb(0x02,0x0faa);      /* index 02                     */ 
outb(0x0f,0x0fab);      /* Linear Address 0x0F000000    */ 
outb(0x03,0x0faa);      /* index 03                     */ 
outb(0x03,0x0fab);      /* swtich 98 to gd54xx          */ 
clgd_wait(20); 
outb(0xe7,0x0ca2);      /* COLOR/MONO Mode Select       */ 
outb(0x00,0x0daa);      /* HV blanking no active        */ 
outw(0x0011,0x0da4);    /* CR0-7 enable                 */ 
hdr(); 
outw(0x1206,0x0ca4);    /* Extention reg enable         */ 
outw(0x0011,0x0da4);    /* CR0-7 enable                 */ 
rotw(0x0ca4,(u16*)&sr); /* Sequencer Register           */ 
rotw(0x0da4,(u16*)&cr); /* CRT Register                 */ 
rotw(0x0cae,(u16*)&gr); /* Graphic Register             */ 
ar_index(); 
rotb(0x0ca0,(u8*)&ar);  /* Attribute Register           */ 
hdr(); 
}

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