dos_data.asm

操作系统实验教程核心技术与编程实例书中地例子代码

STACK           SEGMENT STACK          ;/////used by real_mode
                DB 200 DUP(0)
STACK           ENDS
DATA        SEGMENT PUBLIC 'DATA'      ;各任务公用的数据段
t_string    DB 80 dup(?)
FILE_NAME   DB 80,0,80 DUP(0)
INPUT_MSG   DB 0DH,0AH,'Input file_name:$'
FILE_HANDLE DW 0
FILE_OVER   DW 0
ERR_FILE_NAME    DB 0DH,0AH,'input run file_name error$'
ERR_FILE    DB 0DH,0AH,'Open file error real_mode$'
ERR_EXEFILE DB 'Error: It is not a DOS .exe protect_mode $'
OK_MSG      DB 0DH,0AH,'Have a nice day,Bye!   $'
SAVE_GDT    DW 4 DUP(0)
SAVE_IDT    DW 4 DUP(0)
SAVE_SS     DW 0
SAVE_SP     DW 0
C_BUF_SIZE  DW 0         ;848=350H
C_BUFFER    DB 16000 DUP(?)
tos_sp      dw ?
GDT_ADDR    DW 0
            DW 0,0   ;LIMIT=DW BASE=DW,DW
USER_Ps_LDT_ADDR    DW 0
            DW 0,0   ;LIMIT=DW BASE=DW,DW
USER_P1_LDT_ADDR    DW 0
            DW 0,0   ;LIMIT=DW BASE=DW,DW
DATALEN     = $
DATA        ENDS