text: #include "type.h"
  #include "const.h"
  #include "protect.h"
  #include "proto.h"
  
  EXTERN void disp_int(int);
  
  PUBLIC void init_8259A()
  {
  	/* Master 8259, ICW1. */
  	out_byte(INT_M_CTL,	0x11);
  
  	/* Slave  8259, ICW1. */
  	out_byte(INT_S_CTL,	0x11);
  
  	/* Master 8259, ICW2. 设置 '主8259' 的中断入口地址为 0x20. */
  	out_byte(INT_M_CTLMASK,	INT_VECTOR_IRQ0);
  
  	/* Slave  8259, ICW2. 设置 '从8259' 的中断入口地址为 0x28 */
  	out_byte(INT_S_CTLMASK,	INT_VECTOR_IRQ8);
  
  	/* Master 8259, ICW3. IR2 对应 '从8259'. */
  	out_byte(INT_M_CTLMASK,	0x4);
  
  	/* Slave  8259, ICW3. 对应 '主8259' 的 IR2. */
  	out_byte(INT_S_CTLMASK,	0x2);
  
  	/* Master 8259, ICW4. */
  	out_byte(INT_M_CTLMASK,	0x1);
  
  	/* Slave  8259, ICW4. */
  	out_byte(INT_S_CTLMASK,	0x1);
  
  	/* Master 8259, OCW1.  */
  	out_byte(INT_M_CTLMASK,	0xFD);
  
  	/* Slave  8259, OCW1.  */
  	out_byte(INT_S_CTLMASK,	0xFF);
  }
  
  PUBLIC void spurious_irq(int irq)
  {
  	disp_str("spurious_irq: ");
  	disp_int(irq);
  	disp_str("\n");
  }
  