137 lines
4.9 KiB
NASM
137 lines
4.9 KiB
NASM
;PS: File Save with UFT-8==========================================================
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; FCDOS - Free Chinese DOS
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; fcquit.asm (卸载驻留模块)
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;--------------------------------------------------------------------------------
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; 原始信息：
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; 原始代码发布于：
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; https://www.cn-dos.net/forum/viewthread.php?tid=24334&fpage=1
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; 作者：
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; Macadd <macadd@163.com>
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; 中国DOS联盟论坛 https://www.cn-dos.net/forum/viewpro.php?uid=58572
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;
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; https://sourceforge.net/projects/fcdos/
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; 作者：
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; fc_lijian <fc_lijian@users.sourceforge.net>
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;
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; 原始版本：v1.1.0
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; 许可证：
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; https://www.cn-dos.net/forum/post.php?action=reply&fid=17&tid=24334&repquote=154336
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; Macadd：都是汇编写的COM文件，文件不大，在DOS下用DEBUG看就可以了。 2006-11-27 09:37
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;--------------------------------------------------------------------------------
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; 版本：重构版 v1.0
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; 版权所有 (c) fc_lijian@users.sourceforge.net
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; 重构版本 (c) 2026 Tarime Argus
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;
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; 本文件是FCDOS项目的汇编源码重构版。
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; 原始只有二进制COM文件，现通过反汇编恢复为可维护的汇编代码。
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; 本项目基于开源原则发布，具体许可证遵循原始项目。
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;
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; 功能：退出FCDOS中文平台，清除驻留状态。
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; 使用：fcquit.com
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;
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; 修改历史:
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; 2026-01-08 Tarime Argus 初始版本
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; 2026-02-05 Tarime Argus Ver. 1.0
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;================================================================================
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;FCQUIT.COM renew by Tarime Argus 2026-02-05 Ver. 1.0
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;Compile with JWasm v2.20
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;COMMAND: jwasmd -bin -Fo FCQUIT.COM fcquit.asm
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.286
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.model tiny
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DOSint_PrintString MACRO printString
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MOV DX, offset printString
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call dosint2109h
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ENDM DOSint_PrintString
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.code
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org 100h
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start:
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MOV AX,CS ;初始化数据段
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MOV DS,AX
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;检查中断向量非空
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Check_INT80h:
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MOV AX,3580h ;检查80h中断
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INT 21h
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MOV AX,ES ;检查中断向量是否为空
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AND AX,BX
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JZ Error_KNL_Not_Found ;向量空则进入错误处理
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;--------
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MOV AX,8000h
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INT 80h ;检查80h中断是否为FCD
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CMP AL,80h
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JZ Release_FCD_KNL
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Error_KNL_Not_Found:
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INC byte ptr cs:[error_count] ;错误计数+1
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DOSint_PrintString msgerr_KNL_not_found
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JMP Check_INT81h
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NOP ;此处不加NOP指令不影响程序执行
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Release_FCD_KNL:
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MOV AX,8001h
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INT 80h
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MOV AH,49h
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INT 21h
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PUSH DS ;暂存DS
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LDS DX,CS:[origin_80h_vector] ;加载原INT80h向量到DS:DX
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MOV AX,2580h ;设定中断向量
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INT 21h
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POP DS ;恢复DS
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DOSint_PrintString msg_FCD_KNL_Released
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;检查中断向量非空
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Check_INT81h:
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MOV AX,3581h
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INT 21h
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MOV AX,ES
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AND AX,BX
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JZ Error_RD_Not_Found
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;--------
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MOV AX,8100h
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INT 81h ;检查81h中断是否为FCD
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CMP AL,81h
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JZ Release_FCD_RD
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Error_RD_Not_Found:
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INC byte ptr cs:[error_count] ;错误计数+1
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DOSint_PrintString msgerr_RD_not_found
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JMP Check_Error_Count_and_Exit
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NOP ;此处不加NOP指令不影响程序执行
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Release_FCD_RD:
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MOV AX,8102h
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INT 81h
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MOV AH,49h
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INT 21h
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PUSH DS
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LDS DX,CS:[origin_81h_vector]
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MOV AX,2581h
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INT 21h
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POP DS
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DOSint_PrintString msg_FCD_RD_Released
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JMP Check_Error_Count_and_Exit
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NOP ;此处不加NOP指令不影响程序执行
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;=========================================
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dosint2109h PROC
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MOV AH, 09h ;调用DOS中断09h输出字符串
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INT 21h
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RET
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dosint2109h ENDP
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;=========================================
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Check_Error_Count_and_Exit:
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CMP byte ptr cs:[error_count],00h ;检查错误计数是否为零
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JNZ PrintFCDInfo ;不为零时跳过已经退出消息
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DOSint_PrintString msg_FCD_exited
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PrintFCDInfo:
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DOSint_PrintString byte ptr msg_FCD_info
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MOV AX,4C00h ;退出程序
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INT 21h
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msg_FCD_info db 0dh, 0ah,"The FreeCDOS Project <lijian@auts.edu.cn>", 0dh,0ah, '$'
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msg_FCD_exited db 0dh,0ah,"The FreeCDOS system has exited successful!", '$'
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msg_FCD_KNL_Released db 0dh,0ah,"[FCKNL.COM] has realeased!", '$'
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msg_FCD_RD_Released db 0dh,0ah,"[FCRD.COM] has realeased!", '$'
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msgerr_KNL_not_found db 0dh,0ah,"[FCKNL.COM] not found!", '$'
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msgerr_RD_not_found db 0dh,0ah,"[FCRD.COM] not found!", '$'
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origin_80h_vector dd 00000000h ;CS:[0265h]
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origin_81h_vector dd 00000000h ;CS:[0269h]
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error_count db 00h ;CS:[026Dh]
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end start |