keybd.h

一个小型的操作系统,采用gcc进行开发,几千行的代码,方便初学者学习

/*
*  Snixos Project version 1.0, 2003.6
*  (C) Copyright 2003,2004,2005 Jockeyson,KeqiangGao <[e-mail]>
*  All Rights Reserved.
*  Distributed under the terms of the GNU General Public License.
*
*  This program is a free and open source software and you can redistribute 
*  it and/or modify it under the terms of the GNU General Public License as
*  published by the Free Software Foundation. As no any liablity is assumed 
*  for any incidental or consequential damages in connection with the 
*  information or program fragments contained herein,so any exception arised
*  is at your own risk. It is ABSOLUTELY WITHOUT ANY WARRANTY.
*  Bug report please send to [e-mail] .
*/
/*
  keybd.h: header file for keyboard.c in Snixos Project
  Author : [e-mail]
  Time   : 2003.6

*/
#define LOCKED 1
#define PRESSED 1
#define RELEASED 0

typedef unsigned char byte;

unsigned char ascTab[] = {
    /* 0-9  */ ' ', 0x1b, '1', '2', '3', '4', '5', '6', '7', '8',
    /*10-19 */ '9', '0', '-', '=', '\b', '\t', 'q', 'w', 'e', 'r',
    /*20-29 */ 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', ' ',
    /*30-39 */ 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
    /*40-49 */ '\'', '`', ' ', '\\', 'z', 'x', 'c', 'v', 'b', 'n',
    /*50-59 */ 'm', ',', '.', '/', ' ', '*', ' ', ' ', ' ', ' ',
    /*60-69 */ ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
    /*70-79 */ ' ', ' ', ' ', ' ', '-', ' ', ' ', ' ', '+', ' '
};

unsigned char shiftMap[] = {
    ' ', 0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
    '\b', '\t',
    'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', ' ',
    'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~', ' ', '|',
    'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?'
};

typedef struct status {
    unsigned char LeftShift:1;
    unsigned char RightShift:1;
    unsigned char LeftCtrl:1;
    unsigned char RightCtrl:1;
    unsigned char LeftAlt:1;
    unsigned char RightAlt:1;

    unsigned char CapsLock:1;
    unsigned char NumLock:1;
    unsigned char ScrollLock:1;
    unsigned char ScanExtE0:1;
} keyStatus;

keyStatus ks;

/*  port 60h b0 is ScrollLock, b1 is NumLock, b2 is CapsLock */
byte kbdLEDS;

typedef struct kbuf {
    char scan;
    char ascii;
} keybuf;

keybuf keyBufs[KBSIZE];

int keyHead = 0;
int keyTail = 0;

#define keybdTail (keyBufs+keyTail)
#define keybdHead (keyBufs+keyHead)

static void moveHead();
static void moveTail();

void kbdLedOnOff(unsigned char i);