cos_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

DATA_TOS    SEGMENT PARA USE16              ;全局描述符表
IDT_M       SEGMAP_DESC <>
TOS_TSS_M   SEGMAP_DESC <>
GDT_M       SEGMAP_DESC <>
GPDT_M      SEGMAP_DESC <>
GPT0_M      SEGMAP_DESC <>
TOS_CODE_M  SEGMAP_DESC <>
TOS_STACK_M SEGMAP_DESC <>
DATA_TOS_M  SEGMAP_DESC <>
USER_PSTSS_M SEGMAP_DESC <>         ;used in g_page.asm
USER_PSLDT_M SEGMAP_DESC <>         ;used in g_page.asm
user_p_run  DB 'Sample of changing task : User_p process is running! $'
TEST_MSG    DB 'This is a protect_mode program! $'
TEST1_MSG   DB 'LDT of Dos program: $'
HEAD_DOS    DB 'Head of DOS program: $' 
TEST_CS     DB 'CS: $'
TEST_IP     DB 'IP: $'
COS_FLAG    DB 'C:\>$'
G_WORK      DB 255,18,'RUN C:\TC\G\U1.EXE',0,256 DUP(?),0 
G_WORK_U1   DB 255,14,'C:\TC\G\U1.EXE',0 
G_BUF_SUM   DD 0
IDTSIZE     DW 272                         ;中断表
IDTLOAD     DW 0,0
;********** for v86
V86_IDTSIZE DW 272                         ;中断表
V86_IDTLOAD DW 0,0
V86_ESP     DW 0        
V86_10H02   DB "V86_DEMO: 10H02H(setup cursor:4 row 0 col.) & 21H09H(display this string)",24H
V86_10H09   DB "V86_DEMO: 10H09H:display :",24H
;********** for v86
;********** for FILE
COS_HEAD    DB "Welcome to Use 3G-COS Command Mode   ",24H,0H
PRIBOOT     DB 512 DUP(20) ; main boot sector
DOSBOOTA    DB 1024 DUP(20) ; DOS boot sector  (A OR B:)
DOSBOOT     DB 1024 DUP(20) ; DOS boot sector  (C: AND D:...) 24*512=12288
WORKBOOT    DB 512 DUP(20),0 ; 
OPT         DW 1024 DUP(0)
FILE_INFO   DB 32 DUP(?),0
DAT         DB 112 DUP(?),0
FILE_NAME0  DB "D:\CHIS\TTT\LLL2.TXT",0,103 DUP(?),0,0  ;total is 128 bytes
CURRENT_DIR DB 81 DUP(?)
SYS_CURRENT_DIR   DB 81 DUP(?)
ROOTDIR_FS_NO DD ?
ROOTDIR_LS_NO DD ?
TTSECTOR_NO DD ?
HIDDEN_SECTOR DD ?
TTSECTOR    DB 512 DUP(20),0
TTSECTOR2   DB 512 DUP(20),0
TTSFT       DB 40 DUP(?),0
STR1        DB 1024 DUP(0)
STR2        DB 128 DUP(0)
STR3        DB 128 DUP(0)
TTDB        DB ?
TTDB1       DB ?
TTDB2       DB ?
TTDB3       DB ?
TTDBX       DB 10 DUP(?)
TTDW1       DW ?
TTDW2       DW ?
TTDW3       DW ?
TTDW4       DW ?
TTDW5       DW ?
TTDW6       DW ?
TTDW7       DW ?
TTDD1       DD ?
TTDD2       DD ?
TTDD3       DD ?
TTDD4       DD ?
CMD_WORDS   DB ",EXIT,DIR,TYPE,RUN,",0,0H
CMD_ERROR   DB "Bad Command or File Name ",0H,0H
T_DIR1      DB " Volume Serial Number is ",0H,0H
T_DIR2      DB " Directory of C:\ ",0H,0H
V_DISP_AX   DB 8 DUP(?)
;********** for FILE

;********** for process
CURRENT      DD 0
NEED_RESCHED DB 0       ;0:no  1:need
PCB_TSS      DW 0
PCB_NAME     DB 16 DUP(?)
PCB_PRIORITY DD 100 
CURRENT_PCB  DW 0
CURRENT_SS   DW 1
G_BUF_PTR     DD 400000H    ;  second=10000h (64k)
USER_SEGS_PTR DD 400000H    ;  second=3000h  (3*4096)
TT           DW 0
;********** for process

DATA_TOSLEN = $
DATA_TOS    ENDS