40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
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/*******************************************************************
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* system.c - Basic system functions and variables declaration *
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*******************************************************************/
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#ifndef __SYSTEM_H
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#define __SYSTEM_H
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#include <regs.h>
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#define true 1
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#define false 0
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// Data type declarations
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typedef unsigned char byte;
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typedef unsigned short word;
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typedef unsigned int dword;
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extern byte *TextVideoRam;
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extern volatile int cursor_x, cursor_y;
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extern int current_mode_width;
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extern int current_mode_height;
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extern void *memcpy(void *dest, const void *src, int count);
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extern void *memset(void *dest, char val, int count);
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extern unsigned short *memsetw(unsigned short *dest, unsigned short val, int count);
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extern byte inportb (word _port);
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extern byte inb (word _port);
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static inline void outportb (word _port, byte _data) {
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__asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
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}
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static inline void outb (word _port, byte _data) {
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__asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
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}
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static inline void iowait() {
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asm volatile ("outb %al, $0x80");
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}
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#endif
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