雷军三十年前的内存清理软件代码:技术风格创新之路

前言

说实话,我是不懂DOS编程的,但是看了这段代码以后,整个人都蒙了,他的代码竟然让我神奇的借助我的英语水平看明白,按左Alt键和右Alt键分别可以实现什么功能,属实是很神奇了。像“诗一样优雅”,对齐工整有序,注释排版整齐。我感觉看着像汇编的代码,因为我反编译过一些软件,动手修改过易语言的盗版提示。

雷军曾经写过这么一篇文章:程序人生,标题被当做现在CSDN公众号的标题。

雷军20年前作文曝光:我会当一辈子程序员

"程序人生"的作文
From: Lei Jun
To: Dai Jun
时间: 1996-08-31 00:28

戴老师:
你的命题作文我已经写完,如有不妥之处,请指出。今天下午我已经写完,但突然 ZRM 死机,我没有存盘。晚上只好接着写,真是不幸。文中如有错漏之处可能是我第二遍写漏了。
本文参考过WT和JH的有关讨论信,在此致谢。
=== CUT ===

程序人生
[题记] 如果程序人生的话,这条路太漫长
"程序人生"这个词是什么意思,刚开始时我并不明白。这个词源于业余BBS站,站上PROGRAMMER栏目的中文名就是这个词,英文翻译过来就是"程序员",但程序人生又比程序员多了很多含义,似乎多了一种沧桑感。但不管这么多,讲讲编程感受不算跑题。

首先我先讲讲自己的路,这样也许大家才能相信我的坦诚和我的这篇编程感受的真实性。这些感受是我个人感受,不全面的地方,请大家指正。

我的程序人生路

我并非天生喜欢电脑,上高中时也没有想过程序员的生活。我学电脑非常偶然,小时候的一个好朋友上大学时选择了电脑专业,为了和这个朋友有更多的共同语言,我也选择了计算机系,开始步入程序人生的道路。

当我学了一点电脑知识后,就发现电脑将是我人生的最爱。读书时,我不是特别会搞关系的人,同学关系说不上差,也好不到那里去。我是八七年上的大学,我们大一下学期才有专业课。当我有资格上机的时候,发现电脑世界太美妙,就一头扎进去。当时用的是 Motorola 68000 (相当于 Intel 8088), 540K 的内存,运行的 UNIX 操作系统,八个人一起用。

大二学 PC,又过了一学期,开始出现在老师的实验室,帮忙干活,当时写了现在还有人用的 RI (一个清内存的小工具)。又过了一个学期,开始和校外的公司接触。大二暑假,和一个朋友组建了 Yellow Rose 组,写了我第一个商品软件 BITLOK 0.99。后来开过公司也写过一些软件。

大学毕业后,分到研究所,不太适应研究所的气氛。跳槽到金山软件公司,开始了职业程序员的生涯。后来成了北京金山软件公司的经理,但我还是一名程序员。

编程的感受

--- 程序员活在自己想象的王国里 ---

我刚接触电脑就发现电脑的妙处,电脑远没有人那么复杂。如果你的程序写得好,你就可以和电脑处好关系,就可以指挥电脑干你想干的事。
这个时候你是十足的主宰。每每你坐在电脑面前,你就是在你的王国里巡行。这样的日子简直就是天堂般的日子。

电脑里的世界很大,编程人是活在自己想象的王国里。你可以想象到电脑里细微到每一个字节、每一个比特位的东西。
--- 我爱编程这个工作,可以肯定我会干上一辈子 ---

不少人认为程序员最多干到三十五岁就可以收山换环境了,脑子也差不多该歇歇了,体力也不支了。并认为写程序是年轻人的事情,到了一定岁数,估计没什么人再当程序员了。

当我刚有一点水平的时候,我也认为编程辛苦,也想三十岁后干别的。当我年长一点后就发现了自己的无知。一个人大学毕业就二十一二岁,有点水平的时候可能二十五,接着就是老婆加上孩子和房子等等诸多事情。

一切搞掂的时候,也许就是三十五岁。如果这样的话,我们就不用选择程序人生的道路。

电脑进入我国时间不短,但真正大规模开始用,还是八五年 PC 开始的,因此国内真正写电脑程序的人最长也就写了十几年(不知道是否还有这样的人)。由于电脑应用在国内时间比较短,国内开发的主力是三十五岁以下的年轻人为主。

但这不表示程序员如同红粉佳人般的容易衰老。美国和台湾开发以三十四十多岁的人为主。开始的时候,我们觉得我们没有什么不能做的(现在还能听到这样的豪言壮语),而且更要命的是好象我们特别聪明,特别适合开发软件,比老外强得多。当我们真正接触那些杰出的开发人员的时候,发现他们太厉害了,都有十多年的开发经验。虽然也有很多年轻人做了很多好东西,但决大多数的产品出自这些有丰富开发经验的程序员的手。

刚毕业的时候,编程不仅仅是爱好,而且也成了一辈子的工作。整天不知道写些什么东西,觉得特别没劲,找不到感觉,特别灰心。后来,才明白,只有全身心地投入,程序才会有意识。

写程序简直是在自杀,巨费精力巨费脑子巨累。但我爱编程这个工作,可以肯定我会干上一辈子,虽然我没有打算一生只干这一件事。用一生来编程序是一件既容易又困难的事。如果碌碌无为,为交差写点程序,这样写两辈子的人都有。但如果想全身心地写程序,写十年就不是一件容易的事。

现在我不少朋友都洗手了,有时我也想"用什么电脑,Windows 外的世界不是也很大吗?"。面对电脑的时候,立刻顿悟:电脑还是自己最擅长干的事,也是最顺手的事。

--- 高级程序员不是追求的目标 ---
有的人学习编程技术,是把高级程序员做为追求的目标,甚至是终身的奋斗目标。后来参与了真正的商品化软件开发后,反而困惑了,茫然了。

一个人只要有韧性和灵性,有机会接触并学习电脑的编程技术,就会成为一个不错的程序员。刚开始写程序,这时候学得多的人写的好,到了后来,大家都上了一个层次,谁写的好只取决于这个人是否细心、有韧性、有灵性。掌握多一点或少一点,很快就能补上。成为一个高级程序员并不是件困难的事。

当我上学的时候,高级程序员也曾是我的目标,我希望我的技术能得到别人的承认。后来发现无论多么高级的程序员都没用,关键是你是否能够出想法出产品,你的劳动是否能被社会承认,能为社会创造财富。成为高级程序员绝对不是追求的目标。

--- 编程不仅仅是技术,还是艺术 ---
有人认为编程是一种熟练工种,也有人把编程说成是艺术创作。这两种意见争论比较激烈。

我们换个工种来看,石匠应该是熟练工种,属于工人,更艺术似乎沾不上边。但正是这些石匠,给我们留下多少文物古迹,如乐山大佛、莫高窟等等。应该说这些石匠给我们留下了无穷的文化财产。

现代软件工业已具相当规模,很多软件的完成需要的是大兵团作战。
一名普通程序员接受编写某一模块的任务后,往往只是写代码,发挥的余地很小。

在大项目中,很多程序员只能了解到和自己所编模块相关的很局部的细节,另外还受到开发环境的限制,真的很难体会到自己在从事"艺术"创造,更多的时候是感到自己在从事重体力劳动。有的时候还担心自己苦苦参与的这个项目究竟有没有意义,是不是在同类产品中有竞争力,会不会开发出来以后就因为硬件的发展,操作系统的换代而过时...

我认为编程的工作和石匠比较相似,有很多是技术活甚至是体力活,但编写优秀软件是件很难的事。这两种想法都有片面性,编程应该说两种属性都有。编程不仅仅是技术,也还是艺术。

编程是技术活,才有可能大规模进行,才会有软件工程。也正是编程是艺术,才会有如此多的好产品。
=== END ===
--- 雷军 (ID: Lei Jun) ---
... 那一天知道你要走,我们一句话都没有说
--- Blue Wave/DOS v2.20

  • 内容原稿来自雷军的西点论坛。原文:Origin: West-Point Programmer's BBS * 86-10-6237-8307 (6:650/27)

下面附上代码原文

文件名叫“RI.ASM”,当时的DOS系统大小写貌似是不区分的。

代码写于1994年。经过查询,在一些转载的文章里面确实说是汇编语言。可见他的代码的神奇之处。

;
; RI.ASM Revision 2.12 [ July 12, 1994 ]
Revision equ 'V2.12 '
;
; 
;  
;  RAMinit Release 2.0 
;  Copyright (c) 1989-1994 by Yellow Rose Software Co. 
;  Written by Mr. Leijun 
;  
;  Function: 
;  Press HotKey to remove all TSR program after this program 
;  
; 

; ..........................................................................
; Removed Softwares by RI:
; SPDOS v6.0F, WPS v3.0F
; Game Busters III, IV
; NETX ( Novell 3.11 )
; PC-CACHE
; Norton Cache
; Microsoft SmartDrv
; SideKick 1.56A
; MOUSE Driver
; Crazy (Monochrome simulate CGA program)
; RAMBIOS v2.0
; 386MAX Version 6.01
; ..........................................................................
; No cancel softwares:
; Windows 3.1 MSD
;
; No removed TSR softwares:
; MS-DOS fastopen
; Buffers, Files ... (QEMM 6.0)
; QCache (386MAX 6.01)
; ..........................................................................
;
COMMENT 

V2.04 Use mouse driver software reset function to initiation mouse
2/17/1993 by Mr. Lei and Mr. Feng
V2.05 RI cannot work in Windows DOS prompt
3/9/1993 by Mr. Lei
V2.06 1. When XMS cannot allocate 1K memory, RI halts.
2. RI repeat deallocates EMS memory.
V2.07 HotKey Setup Error
4/25/1993 by Mr. Lei
V2.08 KB Buffer
V2.10 1. Release high memory blocks (EMM386 QEMM386 S-ICE 386MAX)
2. RI copies flag
V2.12 1. Exists a critical error in Init 8259 procedure
2. Save [40:F0--FF] user data area



dosseg
.model tiny
.code
locals @@
org 100h

Start: jmp Main
org 103h

True equ 1
False equ 0
MaxHandles equ 100h

INT3 macro
out 0ffh,al
endm
;
; HotKey Status Test Var
; --------------- ---------------
;
; 7 6 5 4 3 2 1 0 417 418 496
; . . x . x . . . Left Alt is pressed 8 2
; x . . . x . . . Right Alt is pressed 8 8
; . . . x . x . . Left Ctrl is pressed 4 1
; . x . . . x . . Right Ctrl is pressed 4 4
; . . . . . . x . Left Shift is pressed 2
; . . . . . . . x Right Shift is pressed 1
;
LeftAlt equ 00101000b
RightAlt equ 10001000b
LeftCtrl equ 00010100b
RightCtrl equ 01000100b
LeftShift equ 00000010b
RightShift equ 00000001b
HotKey db LeftCtrl or RightCtrl

DataBegin dw 0
NextDataSeg dw 0ffffh
oldInt2F_addr dw 0, 0
XMS_control dw 0, 0
Handle_begin dw 0
cvtOfs dw 0 ; DOS 3.0 equ 0 and above DOS 4.0 is 1
org 104h
db 0dh
db Revision
db ??date
db 26
org 114h
tsrLength dw 0
MachineID db 0FCh ; IBM PC/AT

AuxHotKey db 0 ; 2Dh ; 'X' Scan Code
AuxHotKeyName db 'X$ '
Power db True
Flag db '!'
Kbd102 db 0
NoFlag db 0
StopFlag db 1
DosEnv dw 0
WorkSeg dw 0
PrevDataSeg dw 0
Copies db '1'
old_8259 db 0 ; 21h port
db 0 ; a1h port

Status dw 0
XMSbit equ 00000001b
EMSbit equ 00000010b
SKbit equ 10000000b

GoINT1C: db 0eah
oldInt1C_addr dw 0, 0
newINT1C:
test cs:Status, SKbit
jnz GoINT1C
cmp cs:StopFlag, 0
jz @@0
;
; Mr. Lei 2/8/1993
; Problem: if WPS quit and reenter, old RI cann't control keyboard. ;
push ds
push ax
xor ax, ax
mov ds, ax
mov ax, ds:[94]
cmp ax, offset NewInt9
pop ax
pop ds
jnz GoINT1C
mov cs:StopFlag, 0

@@0: push ax
push ds
push es
xor ax, ax
mov ds, ax
mov es, ds:[94+2]
cmp word ptr es:[101h], 'IE' ; 'LEI'
jz @@1
cli
mov cs:StopFlag, 1
mov ax, ds:[94]
mov cs:oldINT9_addr2, ax
mov ax, ds:[94+2]
mov cs:oldINT9_addr2[2], ax
mov ds:[94], offset newINT9_2
mov ds:[94+2], cs
sti
@@1: pop es
pop ds
pop ax
jmp GoINT1C

; ----------------------------------------------------------------------
; INT2F Func
;
; AX = C0D7h Return RI segment in AX
; AX = C0D8h Removes all TSR programs after RI
; AX = C0D9h Removes all TSR programs include RI
; AX = C0DAh Removes all RI copies
; ----------------------------------------------------------------------

newINT2F:
cmp ax, 0c0d7h ; LEI Hanzi GB Code
jnz @@1
push cs
pop ax
iret
@@1: cmp ax, 0c0d7h+1
jnz @@2
jmp KeepSelf
@@2: cmp ax, 0c0d7h+2
jnz @@3
jmp NoKeepSelf
@@3: cmp ax, 0c0d7h+3
jnz @@9
mov cs:NextDataSeg, -1
mov cs:Copies, '1'
jmp NoKeepSelf
@@9: jmp dword ptr cs:oldInt2F_addr


CallInt9:
ret


newINT9_2:
mov cs:NoFlag, 1
pushf
db 9ah ; call far ptr oldint9_addr
oldInt9_Addr2 dw 0, 0
jmp newINT9_proc

newINT9:
pushf
db 9ah ; call far ptr oldint9_addr
oldInt9_Addr dw 0, 0 cmp cs:NoFlag, 0
jz newINT9_proc
mov cs:NoFlag, 0
iret
newINT9_proc:
cmp cs:Flag, '!' ; busy ?
jnz @@0
iret
@@0:
mov cs:Flag, '!' ; set busy flag
push ax ; cmp hot key
push bx
push es
mov ax,40h
mov es,ax

cmp cs:AuxHotKey, 0
jz @@_1
mov bx, es:[1ah]
cmp bx, es:[1ch]
jz @@10
push bx
mov bl, es:[bx+1]
cmp bl, cs:AuxHotKey
pop bx
jnz @@10
@@_1:
mov ah,es:[17h] ; test CTRL SHIFT ALT
mov al,cs:HotKey
push ax
and ax,0f0fh
cmp al,ah
pop ax
jnz @@10 cmp cs:Kbd102, True
jnz @@1
shr al, 1
shr al, 1
shr al, 1
shr al, 1
push ax
mov ah, es:[18h]
and ax, 303h
cmp al, ah
pop ax
jnz @@10
mov ah, es:[96h]
shr ax, 1
shr ax, 1
and ax, 303h
cmp al, ah
jnz @@10 cmp cs:AuxHotKey, 0
jz @@_3
inc bx
inc bx
cmp bx, 3eh
jb @@_2
mov bx, 1eh
@@_2:
mov es:[1ah], bx
@@_3:
call IsWinDos
or ax, ax
jz @@1
call Beep
@@10:
sti
pop es
pop bx
pop ax
mov cs:Flag, ' ' ; no busy
iret
@@1: ; OK
pop es
pop bx
pop ax

KeepSelf:
call RemoveTSR
push es
mov es,cs:WorkSeg
mov dx,es:tsrLength
mov di,dx
mov al,0h ; Aug 24, 1993
mov cx,100h
rep stosb
pop es
int 27h

NoKeepSelf:
mov ax,0e07h
int 10h
mov cs:clsStr, 47h ; Color (White in Red)
call RemoveTSR
dec cs:Copies
call RestoreSelfIntVec
push es
cmp cs:PrevDataSeg, 0
jz @@1
mov es, cs:PrevDataSeg
mov es:NextDataSeg, -1
@@1: pop es
mov ax, 4c00h
int 21h

; ---------------------------------------------------------------------------

IsWinDOS:
mov ax, 1600h
int 2fh
cmp al, 01h
jz @@9 cmp al, 0ffh
jz @@9 ; Windows/386 Version 2.X
cmp al, 00h
jz @@1 cmp al, 80h
jnz @@9 ; Windows 3 in enhanced mode
; Version number in AL/AH
@@1:
mov ax, 4680h
int 2fh
cmp al, 80h
jnz @@9
xor ax, ax
jmp @@10
@@9: mov ax, 1
@@10: ret

; -----------------------------------------------------------------------
RestoreSelfIntVec:
cmp Copies, '0'
jz @@0
ret
@@0:
cli
push cs
pop ds
xor ax, ax
mov es, ax
mov si, offset oldInt9_Addr
mov di, 94
movsw
movsw
mov si, offset oldInt2F_Addr
mov di, 2Fh4
movsw
movsw
mov si, offset oldInt1C_Addr
mov di, 1Ch4
movsw
movsw
sti
ret

; ------------- KERNEL PROGRAM ----------------------------------------------
RemoveTSR:
pop ax
cli ; Set stack
mov sp, cs
mov ss, sp
mov sp, 100h
sti
push ax

cmp cs:Power, True
jnz @@1
call Init8259
@@1:
push cs
pop ds
@@_0:
mov ax,ds:NextDataSeg
cmp ax, -1
jz @@_1
mov cs:PrevDataSeg, ds
mov ds, ax
jmp @@_0
@@_1: mov si,ds:DataBegin
mov cs:WorkSeg, ds
lodsw
cmp ax, 'XX'
jz @@_2
call Beep
ret
@@_2:
call RestoreEnvStr
call RestoreMCB ; restore current mcb
call CloseFiles
call RestorePort
call RestoreLEDs
call RestoreVecList ; Restore vectors list
call RestoreFloppyParam
cmp cs:Power, True
jnz @@2
call RestoreCVTchain ; Restore cvt chain
call RestoreMemoryManager
@@2:
call RestoreBiosData
call Enable8259
mov ah, 1 int 16h

call RestoreClockSpeed
call CloseSpeaker
call ResetDisk
call UpdateTime

call ClosePRN
mov bx,cs:WorkSeg
mov ah,50h
int 21h ; Set PSP segment
mov ax,3 int 10h ; Set display mode

call InitPRN
call InitMouse
mov al, cs:Copies
cmp al, '1'
ja @@_sh1
mov cs:ShowCopies, ''
jmp @@_sh2
@@_sh1: mov cs:ShowCopies, al
@@_sh2:
mov si, offset clsStr
call ColorPrintStr
mov cs:Flag, ' ' ; no busy
cmp Copies, '1'
jnz @@_end
mov cs:StopFlag, 0
@@_end:
call ClearKB_buffer
ret

Beep:
mov ax,0e07h
int 10h
ret

; #########################################################################

ClearKB_Buffer:
push es
push bx
mov bx, 0040h
mov es, bx
cli
mov bx, es:[1ah]
mov es:[1ch], bx
sti
pop bx
pop es
ret


Init8259:
; cmp cs:Copies, '1'
; jz @@1
; ret
@@1:
cmp cs:MachineID, 0fch
ja @@pc_xt
@@AT:
mov bx,870h ;
mov al,0 ;
out 0F1h,al ;
jcxz $+2
jcxz $+2
mov al,11h ; ICW1
out 0A0h,al
jcxz $+2
jcxz $+2
out 20h,al
jcxz $+2
jcxz $+2
mov al,bl ; ICW2
out 0A1h,al
jcxz $+2
jcxz $+2
mov al,bh
out 21h,al
jcxz $+2
jcxz $+2
mov al,2 ; ICW3
out 0A1h,al
jcxz $+2
jcxz $+2
mov al,4
out 21h,al
jcxz $+2
jcxz $+2
mov al,1 ; ICW4
out 0A1h,al
jcxz $+2
jcxz $+2
out 21h,al
jcxz $+2
jcxz $+2
mov al,0FFh ; OCW1
out 0A1h,al
jcxz $+2
jcxz $+2
out 21h,al
ret
@@PC_XT:
mov al,13h ; ICW1
out 20h,al
jcxz $+2
jcxz $+2
mov al,8 ; ICW2
out 21h,al
jcxz $+2
jcxz $+2
mov al,9 ; ICW4
out 21h,al
jcxz $+2
jcxz $+2
mov al,0FFh ; OCW1
out 21h,al
ret

Enable8259:
mov ax, word ptr cs:old_8259
out 021h,al
jcxz $+2
jcxz $+2
mov al,ah
out 0a1h,al ; DEC PC Bus Mouse
ret ; July 1994 by Mr. Lei

; -------------------------------------------------------------------------

RestoreBiosData:
lodsw
cmp ax, '--'
jz @@1
call Beep
ret
@@1: push es
push di
mov di, 40h
mov es, di

mov di, 10h
movsw
mov di, 0a8h ; [40h:a8h]
movsw
movsw
mov di, 49h
mov cx, 1dh
rep movsb

mov di, 0f0h ; User data
mov cx, 8
rep movsw

pop di
pop es
ret

; -------------------------------------------------------------------------

RestoreMCB:
push ds
push es
lodsw ; 'MZ'
@@0: lodsw
cmp ax, 'MM'
jz @@1
mov es,ax
xor di,di
movsb
movsw
movsw
inc ax
mov bx, ds
cmp ax, bx
jz @@10
mov byte ptr es:[8], 0 ; Aug 24, 1993
@@10: cmp byte ptr es:[0], 'Z'
jnz @@0
mov byte ptr es:[10h], 0
jmp @@0
@@1:
pop es
pop ds
ret

; -------------------------------------------------------------------------
CloseFiles:
mov ax, 5 ; Begin handle
push ds
push si
mov cx, 15 ; Max handle
sub cx, ax
inc cx
mov bx, ax
@@1: push bx
push cx
mov ah, 3eh
int 21h
pop cx
pop bx
inc bx
loop @@1
pop si
pop ds
ret

; -------------------------------------------------------------------------
RestorePort:
mov di, 40h ; restore port
mov es, di
xor di, di
mov cx, 8
rep movsw
ret

; -------------------------------------------------------------------------
RestoreLEDs:
lodsb
and al, 11110000b ; LED status
mov ah, es:[17h]
and ah, 00001111b
or ah, al
and ah, 0f0h ; Clear CTRL ALT SHIFT
mov es:[17h], ah
ret

; -------------------------------------------------------------------------
RestoreEnvStr:
lodsw
push si
push di
push ds
push es
mov es, cs:DosEnv
mov ds, ax
xor si, si
mov di, si
@@0: lodsb
or al, al
jnz @@1 cmp byte ptr ds:[si], 0
jz @@2
@@1: stosb
jmp @@0
@@2: stosb
stosb
pop es
pop ds
pop di
pop si
ret

; -----------------------------------------------------------------------
RestoreVecList:
xor ax,ax
mov di,ax
mov es,ax
mov cx,100h
@@0: lodsw
xchg dx, ax
lodsw
cmp dx, 'EL'
jnz @@1 cmp al, 'I'
jnz @@1
sub cl, ah
push cx
mov cl, ah
mov ax, es:[di-4]
mov dx, es:[di-2]
@@a: stosw
xchg ax, dx
stosw
xchg ax, dx
loop @@a
pop cx
or cx, cx
jz @@9
jmp @@0
@@1:
xchg ax, dx
stosw
xchg ax, dx
stosw
loop @@0
@@9:
ret

;----------------------------------------------------------------------------
RestoreFloppyParam: ; Mr. Lei 2/10/1992
push es
push ax
xor ax, ax
mov es, ax
mov byte ptr es:[525h], 2
pop ax
pop es
ret

;---------------------------------------------------------------------------
RestoreCVTchain:
lodsw
cmp ax, 'VC'
jz @@_0
call Beep
ret
@@_0:
push ax
push cx
push es

; -----------------------------------------------------------------
lodsw ; DPB
mov di, ax
lodsw
mov es, ax
@@1: lodsb
inc di
stosb
add di, cs:cvtOfs
add di, 10h
movsw
movsw
les di, es:[di+2]
cmp di, -1
jnz @@1

; -----------------------------------------------------------------
lodsw ; DCB
mov di, ax
lodsw
mov es, ax
xor ax, ax
dec ax
stosw

; -----------------------------------------------------------------
lodsw ; Device Driver Chain
mov di, ax
lodsw
mov es, ax
xor cx, cx
@@9: push di
mov cl, 5
rep movsw
pop di
les di, es:[di]
mov ax, di
inc ax
jnz @@9
pop es
pop cx
pop ax
ret

; ----------------------------------------------------------------------------
RestoreMemoryManager:
test cs:Status, XMSbit
jz @@1
call LoadXMSstatus
@@1:
test cs:Status, EMSbit
jz @@2
call LoadEMSstatus
@@2:
ret


LoadEMSstatus:
lodsw
cmp ax, 'ME'
jz @@_0
call Beep
ret
@@_0:
lodsw
mov cx, ax
xor dx, dx
@@_1: push ds
push si
push dx
push cx

@@0: cmp dx, ds:[si]
jz @@1
add si, 4
loop @@0

push cx
mov cx, 5
@@0: mov ah, 45h ; Deallocate Handle and Memory
int 67h
or ah, ah
jz @@1
loop @@0
@@1: pop cx

@@1:
pop cx
pop dx
pop si
pop ds
inc dx
cmp dx, 100h
jb @@_1
shl cx, 1
shl cx, 1
add si, cx
ret


LoadXMSstatus:
lodsw
cmp ax, 'MX'
jz @@_0
call Beep
ret
@@_0:
lodsw
mov cx, ax
jcxz @@5
@@1:
lodsw
mov dx, ax
@@2: push dx
mov ah, 0ah ; free
call dword ptr cs:xms_control
or ax, ax
pop dx
jnz @@4 cmp bl, 0abh
jnz @@4
push dx
mov ah, 0dh ; unlock
call dword ptr cs:xms_control
or ax, ax
pop dx
jmp @@2
@@4: loop @@1
@@5: ret
endp

; -----------------------------------------------------------------------
CloseSpeaker:
in al, 61h
and al, 0fch
out 61h, al
ret

; -----------------------------------------------------------------------
RestoreClockSpeed:
mov al, 00110110b
out 43h, al
xor ax, ax
out 40h, al
out 40h, al
ret

; -----------------------------------------------------------------------
ResetDisk:
xor ax, ax
xor dx, dx
int 13h ; Restore A
inc dx
int 13h ; Restore B
mov dl, 80h
int 13h ; Restore C
ret



; --------------------------------------------------------------------------
ClosePRN:
mov ah, 51h ; Get PSP seg
int 21h
mov es, bx
mov ax, es:[16h] ; Prev PSP seg
cmp ax, bx
jnz @@9
mov ax, 3e00h ; COMMAND
mov bx, 4 int 21h
@@9:
ret

InitPRN:
mov ax, 3e00h
mov bx, 4 ; PRN
int 21h
mov ax, 3d01h
mov dx, offset PRNname
push cs
pop ds
int 21h
ret
PRNname db 'PRN',0

InitMouse: ; 2/16/1993 by Mr. Lei
push es
xor ax, ax
mov es, ax
cmp word ptr es:[33h4+2], 0
jz @@0 cmp word ptr es:[33h4], 0
jz @@0
mov ax, 21h
int 33h ; Hook Mouse Interrupt
@@0: pop es
ret

; ------------- CMOS CLOCK set to System -----------------------------------
UpdateTime:
call GetRealTime
mov ah, 2dh
int 21h
ret

GetRealTime:
mov ah,2 int 1Ah
mov al,ch
call bcdxchg
mov ch,al
mov al,cl
call bcdxchg
mov cl,al
mov al,dh
call bcdxchg
mov dh,al
mov dl,0
ret

BCDxchg:
push ax
push cx
mov cl,4
shr al,cl
pop cx
mov bl,0Ah
mul bl
pop bx
and bl,0Fh
add al,bl
ret

; -----------------------------------------------------------------------
; Display string
ColorPrintStr:
lodsb
mov bh, al ; color
xor cx, cx
mov dx, 014fh
mov ax, 0600h
int 10h

mov ah, 02 ; GotoXY (0, 0)
xor dx, dx
mov bh, 0 int 10h
PrintStr:
push cs
pop ds
xor bx, bx
@@1: lodsb
cmp al, '$'
jz @@2
or al, al
jz @@2
mov ah, 0eh
int 10h
jmp short @@1
@@2: mov al, cs:clsStrcolor
mov cs:clsStr, al
ret

; -----------------------------------------------------------------------
Self dw 0
clsStrcolor db 17h
clsStr db 17h ; Color (White in Blue)
db ' RAMinit Version 2.12 (c) 1989-1994 by KingSoft Ltd. Mr. Leijun'
db 0dh,0ah
db ' ['
ShowCopies db ''
db '] Activate...',0ah,0dh,'$'

endTSR equ $
mcbList equ offset endTSR + 2 + 2
vecList equ mcbList + 710 + 2 + 10h + 1 + 400h
devLink equ vecList + 4 + 5  26 + 4 + 10  30h + 4
xmsList equ devLink + 2 + MaxHandles  2
emsList equ xmsList + 4 + 1024
crtMode equ emsList + 2 + 1Dh + 4 + 10h
tsrLen equ crtMode + 1
;
; DOS Environment Reserved by RI
; --------------------------------------------------
; Flag 'XX' 2 bytes
; Environment Segment 1 word
; Free MCBs <=710 bytes
; MCB segment 1 word
; MCB 5 bytes
; End flag 'MM' 1 word
; COM LPT ports 10h bytes
; LEDs status 1 bytes
; Packed vectors list <=400h bytes
; Flag 'CV' 2 bytes
; CVT First DPB pointer 4 bytes
; DPBs data <=526 bytes
; First DCB pointer 4 bytes
; Pointer to NUL 4 bytes
; All device driver datas <=30h10 bytes
; Flag 'XM' 2 bytes
; XMS free handle counter 2 bytes
; EMS free handle list <=100h4 bytes
; Flag 'EM' 2 bytes
; EMS free handle counter 2 bytes
; EMS free handle list <=1024 bytes
; EMS handle 1 word
; Number of pages 1 word
; Flag '--' 1 word
; Equipment List 1 word
; CRT 40:49h-66h 1dh bytes
; 40:A8h 1 dword
; BIOS User Data Area 40:F0--FF 10h bytes
; **
;
main: jmp main0

Print Macro Str
Lea dx, Str
call DisplayStr
endm

InstMsg db 'RAMinit Version 2.12 '
db 'Copyright (c) 1989-1994 by KingSoft Ltd. ',0dh,0ah,'$'
Msg0 db 'Already installed !',0dh,0ah,0ah
db 'For Help, type "RI /?". ',0dh,0ah,'$'
Msg_0 db 0ah,'Residents a new RAMinit copy [y/n] ? $'
Msg_2 db 'OK, RI No.'
Msg_RI db '2'
db ' residents successful !', 0dh,0ah,'$'
Msg1 db 'Activate with: $'
KeyMsg db 'Right_Shift$'
db 'Left_Shift$ '
KMsg1 db 'Left_Ctrl$ '
db 'Left_Alt$ '
db 'Right_Ctrl$ '
db 'Right_Alt$ '
KMsg2 db 'Ctrl$ '
db 'Alt$ '
db 'Ctrl$ '
db 'Alt$ '
PlusMsg db ' + $'
crlf db 0dh,0ah,'$'

HelpMsg db 'Programmed by Mr. Leijun Dec 1992', 0dh,0ah,0ah
db 'Usage: RI [options]',0dh,0ah,0ah
db '/H,/? Display this screen',0dh,0ah
db '/CLS Removes all TSR programs after current RI',0dh,0ah
db '/RET Removes TSR programs include current RI',0dh,0ah
db '/NEW Residents a new data copy of current environment',0dh,0ah
db '/ALL Removes all RI copies and all other tsr programs',0dh,0ah
db '/Sxyy.. Define Hotkey x=AuxHotkey yy..=shift status',0dh,0ah
db ' x=auxiliary hotkey (default is "X") ',0dh,0ah
db ' x equ "1" means need AuxHotkey',0dh,0ah
db ' yy..=shift status [CAScas]',0dh,0ah
db ' C: Left Ctrl A: Left Alt S: Left Shift',0dh,0ah
db ' c: Right Ctrl a: Right Alt s: Right Shift',0dh,0ah,0ah
db 'Example: "RI /S1c" means Hotkey is Right_Ctrl+X',0dh,0ah
db ' "RI /S0Cc" means HotKey is Left_Ctrl+Right_Ctrl',0dh,0ah
db ' "RI /CLS" equals simply press hotkey',0dh,0ah
db ' "RI /RET" Removes all TSRs after current RI and this RI',0dh,0ah
db 0ah
db 'Contact me for RAMinit problems: (01)2561155 Call 1997',0dh,0ah
db '$'
ErrMsg db 'ERROR: Invalid options !',0dh,0ah,0ah,'$'
WinErr db 7, 'Sorry, I cannot work in Windows DOS environment.',0dh,0ah,'$'
SetMsg db 7, 'Defines new Hotkey successful !',0dh,0ah,0ah,'$'
tsrOK db False

Main0:
cld
Print instMsg
call IsWinDos
or ax, ax
jz @@1
Print WinErr
mov ax, 4c00h
int 21h
@@1:
call HotKeyValid
mov cs:Status, 0
call EMS_test
call CmpDosVer
call CmpSideKick
call GetMachineID
call ModifyHotKeyPrompt

mov ax, 0c0d7h
int 2fh
mov es, ax
cmp word ptr es:[101h], 'IE' ; 'LEI'
jnz @@0
mov cs:Self, ax
@@0:
call CmdLine
call PrintHotKeyPrompt

cmp cs:tsrOK, true
jz @@2
call tsrReplyOK
@@2: cmp cs:tsrOK, true
jnz @@_2
call PrintCopies
@@_2:
mov word ptr cs:[100h], 'EL'
mov byte ptr cs:[102h], 'I'

push cs
pop es
push cs
pop ds
std
mov si, offset eof
mov cx, eof - offset Here
mov di, tsrLen
add di, cx
inc cx
rep movsb
cld
mov bx, tsrLen
jmp bx

Here:
mov ax,cs
mov es,ax
mov di,offset endTSR
mov cs:DataBegin, di
mov cs:NextDataSeg, -1
mov ax, 'XX'
stosw
in al, 0a1h
mov ah, al
in al, 21h
push ax
mov word ptr cs:old_8259, ax
xor ax, ax
out 21h,al ; CLI
call SaveOthers
call SetSelfInt
call BackupVecList
cmp cs:Power, true
jnz @@20
call BackupCVTchain
call BackupMemoryManager
@@20:
call BackupBiosData

sti
mov cs:Flag, ' ' ; no busy
mov cs:StopFlag, 0 ;

mov cs:tsrLength, di
call SetDosEnvSeg
cmp cs:Self, 0
jz @@29
push cs
pop ds
push cs
pop es
cld
mov cx, cs:tsrLength
mov si, cs:DataBegin
sub cx, si
mov di, 120h
mov cs:DataBegin, di
rep movsb
mov cs:tsrLength, di
@@29:
pop ax
out 21h, al ; STI
mov al, ah
out 0a1h, al
mov dx, cs:tsrLength
inc dx
int 27h

; ----------------------------------------------------------------------------
SetDosEnvSeg:
push ds
push es
mov ax, cs
@@10: mov es, ax
mov ax, es:[16h] ; Get father process psp segment
or ax, ax
jz @@11
mov bx, es
cmp ax, bx
jnz @@10
@@11:
mov es, word ptr es:[2ch] ; Get father process env segment
mov cs:DosEnv, es
pop es
pop ds
ret

; ----------------------------------------------------------------------------

SaveOthers:
mov ax, cs:[2ch] ; Env Seg
stosw
call backupMCB ; Current MCB
mov ax, 40h ; COM LPT Port
mov ds, ax
mov si, 0h
mov cx, 8
rep movsw

mov si, 17h ; LED status
lodsb
stosb
; call OpenLEDs
ret

; --------------------------------------------------------------------------
backupMCB:
mov ax, 'ZM'
stosw
push ds
push es
mov ah, 52h
int 21h ; Get MCB chain head
mov ax, es:[bx-2]
pop es
@@0: mov ds, ax
cmp byte ptr ds:[0], 'Z' ; End ?
jz @@20 cmp byte ptr ds:[0], 'M' ; Memory control block
jnz @@30 cmp word ptr ds:[3], 0 ; Nul mcb
jz @@10 cmp word ptr ds:[1], 0 ; Free MCB
jnz @@10
call SaveFreeMCB
@@10: inc ax
add ax, ds:[3]
jmp @@0
@@20:
call SaveFreeMCB
cmp ax, 0a000h
inc ax
jnb @@30
mov ax, 9fffh ; MS-DOS UMB
jmp @@0

@@30:
cmp ax, 0c000h ; 386MAX
ja @@90
mov ax, 0c020h
jmp @@0

@@90: ; Error ?
pop ds
mov ax, 'MM' ; Set MCB flag
stosw
ret

SaveFreeMCB:
stosw
xor si,si
movsb
movsw
movsw
ret
;
; push ax
; stosw
; xor si,si
; movsb
; movsw
; movsw
; pop ax
; cmp ax, 09fffh
; jnb @@3
; push ax
; push ds
; mov ds,ax
; cmp byte ptr ds:[0], 'M'
; pop ds
; pop ax
; jnz @@4
; mov ax, 09fffh ; MS-DOS UMB
; jmp @@0
; @@4: cmp ax, 0c000h
; ja @@3
; mov ax, 0c020h ; 386MAX
; jmp @@0
;
; --------------------------------------------------------------------------

OpenLEDs: push ax ; Open all LEDs
or al, 070h
mov ds:[17h], al
mov ah, 1 int 16h
mov cx, 4 ; Delay
@@20: push cx
xor cx, cx
@@21: loop @@21
pop cx
loop @@20
pop ax
mov ds:[17h], al
mov ah, 1 int 16h
ret

; --------------------------------------------------------------------------
SetSelfInt:
push es
push di

cmp cs:self, 0
jnz @@1
push cs
pop ds
mov ax,3509h
int 21h
mov word ptr cs:oldInt9_addr,bx
mov word ptr cs:oldInt9_addr[2],es
mov dx,offset NewInt9
mov ax,2509h
int 21h

mov ax,352Fh
int 21h
mov word ptr cs:oldInt2F_addr,bx
mov word ptr cs:oldInt2F_addr[2],es
mov dx,offset newInt2F
mov ax,252Fh
int 21h

mov ax,351Ch
int 21h
mov word ptr cs:oldInt1C_addr,bx
mov word ptr cs:oldInt1C_addr[2],es
mov dx,offset newInt1C
mov ax,251ch
int 21h
cli
jmp @@2
@@1:
mov es, cs:Self
inc es:Copies
@@_0: cmp es:NextDataSeg, -1
jz @@_1
mov es, es:NextDataSeg
jmp @@_0
@@_1: mov es:NextDataSeg, cs
@@2:
pop di
pop es
ret

; -----------------------------------------------------------------------
SaveCounter:
mov word ptr es:[di], 'EL'
mov byte ptr es:[di+2], 'I'
mov byte ptr es:[di+3], bl
xor bx, bx
add di, 4
ret

; -----------------------------------------------------------------------
DisplayStr: push cs
pop ds
mov ah, 9 int 21h
ret

; -----------------------------------------------------------------------
CmdLine:
push cs
pop ds
xor ax, ax
mov si, 80h
lodsb
or al, al
jnz @@1
ret
@@1:
mov cx, ax
dec ax
push ax
push si
@@0: lodsb
cmp al, ' '
jz @@0 cmp al, '/'
jnz @@2
lodsb
cmp al, 'S'
jz @@_2
cmp al, 's'
jnz @@2
@@_2:
call SetHotKey
Print SetMsg
mov ax, 4c00h
int 21h
@@2:
pop si
pop ax
push ax
push si
@@_3: lodsb
cmp al, 'A'
jb @@3 cmp al, 'Z'
ja @@3
add byte ptr ds:[si-1],20h ; DownCase
@@3: loop @@_3
pop si
pop cx

add si, cx
lodsb
cmp al, 's' ; CLS
jnz @@5 cmp word ptr ds:[si-3], 'lc'
jnz @@5 cmp cs:Self, 0
jz @Err
mov ax, 0c0d7h+1 int 2fh

@@5: cmp al, 'h' ; HELP
jz @help
cmp al, '?'
jz @help
cmp al, 't' ; RET
jnz @@6 cmp word ptr ds:[si-3], 'er'
jnz @@6
@@7:
cmp cs:Self, 0
jz @Err
mov ax, 0c0d7h+2 int 2fh
@@6: cmp al, 'w' ; NEW
jnz @@8 cmp word ptr ds:[si-3], 'en'
jnz @@8
mov cs:tsrOK, true
ret
@@8:
cmp al, 'l' ; ALL
jnz @@9 cmp word ptr ds:[si-3], 'la'
jnz @@9
mov ax, 0c0d7h+3 int 2fh
@@9:
cmp al, ' '
jnz @Err
ret

@Err:
Print ErrMsg
@help:
Print HelpMsg
mov ax, 4c00h
int 21h

;---------------------------------------------------------------------------
tsrReplyOK:
cmp cs:Self, 0
jz @@1
Print Msg0

push es
mov ax, cs:Self
@@_10: mov es, ax
mov ax, es:NextDataSeg
cmp ax, -1
jnz @@_10
mov ax, es

@@_0: push ax
dec ax
mov es, ax
mov bx, es:[3]
pop ax

add ax, bx
inc ax
mov es, ax
cmp word ptr es:[0], 'OC'
jz @@_0

mov bx, cs
cmp ax, bx
pop es
jz @@2
Print Msg_0
mov ah, 1 int 21h

push ax
Print crlf
pop ax

cmp al, 'y'
jz @@3 cmp al, 'Y'
jz @@3
@@2: ; Print Msg_1
mov ax, 4c01h
int 21h
@@3:
@@1: mov cs:tsrOK, true
ret

PrintCopies:
cmp cs:Self, 0
jz @@1
push es ; Added -by- Mr. Lei
mov es, cs:Self ; Aug 24, 1993
mov al, es:Copies
inc al ; Total RI copies
push ax ; Set es = current mcb
mov ax, cs
dec ax
mov es, ax
pop ax
mov cx, 5 ; Search end of file name
mov bx, 8
@@10: inc bx
cmp byte ptr es:[bx], 20h
jz @@20 cmp byte ptr es:[bx], 0ffh
jz @@20 cmp byte ptr es:[bx], 00h
jz @@20
loop @@10
@@20: ; Set current RI no
mov byte ptr es:[bx], ':' ; "RI:2"
mov byte ptr es:[bx+1], al
cmp bx, 8+7
jnb @@30
mov byte ptr es:[bx+2], 0
@@30:
pop es

mov cs:Msg_RI, al
Print Msg_2
@@1: ret

;---------------------------------------------------------------------------
; Backup Interrupt Vector List
;
BackupVecList:
push ds
push cs
pop es
xor si,si ; Vectors
mov ds,si
movsw
movsw
xor bx, bx
mov cx,00ffh
@@0: lodsw
xchg dx, ax
lodsw
cmp ax, es:[di-2]
jnz @@1 cmp dx, es:[di-4]
jz @@2
@@1: or bx, bx
jz @@3
call SaveCounter
@@3: xchg dx, ax
stosw
xchg dx, ax
stosw
loop @@0
jmp @@4
@@2: inc bx
loop @@0
call SaveCounter
@@4:
pop ds
ret
;
;-----------------------------------------------------------------------------
BackupCVTchain:
mov ax, 'VC'
stosw
push ax
push bx
push cx
push ds
push es
mov ah, 52h
int 21h ; ES:BX -- DOS table as described below

; --------------------------------------------------------------------
push es ; DPB chains
push bx
lds si, es:[bx]
push cs
pop es
mov ax, si
stosw
mov ax, ds
stosw
mov bx, cs:cvtOfs
xor cx, cx
@@1: mov al, ds:[si+1]
stosb
mov ax, ds:[si+bx+12h]
stosw
mov ax, ds:[si+bx+14h]
stosw
inc cx
lds si, ds:[si+bx+18h]
cmp si, -1
jnz @@1
; mov ax, 5
; mul cl
; add ax, 4
; add cs:tsrLength, ax
pop bx
pop es

; --------------------------------------------------------------------
push es ; DCB file control blocks
push bx
les bx, es:[bx+4]
@@11: cmp word ptr es:[bx], -1
jz @@10
les bx, es:[bx]
jmp @@11
@@10:
mov ax, es
xchg ax, bx
push cs
pop es
stosw
xchg ax, bx
stosw
pop bx
pop es
; add cs:tsrLength, 4

; ---------------------------------------------------------------------
push es ; Device Driver Chains
pop ds
add bx, 22h
mov si, bx ; NUL

pop es
mov ax, si
stosw
mov ax, ds
stosw
xor cx, cx
xor bx, bx
@@9: push si
mov cl, 5
rep movsw
inc bx
pop si
lds si, ds:[si]
mov ax, si
inc ax
jnz @@9

pop ds
pop cx
pop bx
pop ax
ret

; ----------------------------------------------------------------------------

BackupBiosData:
mov ax, '--'
stosw
push ds
push si
mov si, 40h
mov ds, si
mov si, 10h
movsw
mov si, 0a8h
movsw
movsw
mov si, 49h
mov cx, 1dh
rep movsb

mov si, 0f0h
mov cx, 8
rep movsw
pop si
pop ds
ret

; ---------------------------------------------------------------------------

BackupMemoryManager:
push cs
pop es
push ds
push es
call SaveXMSstatus
call SaveEMSstatus
pop es
pop ds
ret

;---------------------------------------------------------------------

SaveEMSstatus:
test cs:status, EMSbit
jnz @@1
ret
@@1:
mov ax, 'ME'
stosw
inc di
inc di
push di
mov ah, 4dh
int 67h
pop di
mov es:[di-2], bx
shl bx, 1
shl bx, 1
add di, bx
ret
; -------------------------------------------------------------------

SaveXMSstatus:
call XMS_test
test cs:status, XMSbit
jnz @@1
ret
@@1:
mov ax, 'MX'
stosw

mov dx, 1
call XMS_alloc
jnz @@_1
xor cx, cx ; XMS alloc failure
stosw
ret
@@_1:
push dx
sub dx, MaxHandles  10
@@2:
push dx
call XMS_Lock
pop dx
jnz @@3 cmp bl, 0a2h
jnz @@4
add dx, 10
jmp @@2
@@3: push dx
call XMS_unlock
pop dx
@@4:
mov cs:handle_begin, dx
pop dx
push dx
call XMS_bstat
xor cx, cx
mov cl, bl
inc cx
pop dx
call XMS_Free
mov dx, cs:Handle_begin

push cx
push cs
pop es
mov ax, cx
stosw
@@5: push dx
call XMS_Lock
pop dx
jnz @@6 cmp bl, 0a2h ; Handle invalid
jz @@7
@@6: call XMS_unlock
add dx, 10
jmp @@5
@@7: mov ax, dx
stosw
add dx, 10
loop @@5
pop cx
ret
; ------------------------------------------------------------------

XMS_test:
push es
mov ax, 4300h
int 2fh
cmp al, 80h
jnz @@9
mov ax, 4310h
int 2fh
mov cs:XMS_control, bx
mov cs:XMS_control[2], es
or cs:Status, XMSbit
@@9:
pop es
ret

XMS_stat:
mov ah, 0
call dword ptr cs:xms_control
mov hma_exist, dl
ret
hma_exist db 0

XMS_alloc:
mov ah, 9
call dword ptr cs:xms_control
or ax, ax
ret

XMS_lock:
mov ah, 0ch
call dword ptr cs:xms_control
or ax, ax
ret

XMS_unlock:
mov ah, 0dh
call dword ptr cs:xms_control
or ax, ax
ret
XMS_bstat:
mov ah, 0eh
call dword ptr cs:xms_control
or ax, ax
ret

XMS_free:
mov ah, 0ah
call dword ptr cs:xms_control
or ax, ax
ret

; ----------------------------------------------------------------------------
EMS_test:
push cs
pop ds
mov dx, offset EMMname
mov ax, 3d00h
int 21h
jc @@2
mov bx, ax
mov ah, 3eh
int 21h
or cs:Status, EMSbit
@@2:
ret
EMMname db 'EMMXXXX0',0

; -----------------------------------------------------------------------------

SetHotKey:
xor bx, bx
lodsb
push ax

@@1: lodsb
cmp al, 0dh
jz @@9 cmp al, 'C'
jnz @@2
or bl, LeftCtrl
jmp @@1
@@2:
cmp al, 'c'
jnz @@3
or bl, RightCtrl
jmp @@1
@@3:
cmp al, 'A'
jnz @@4
or bl, LeftAlt
jmp @@1
@@4:
cmp al, 'a'
jnz @@5
or bl, RightAlt
jmp @@1
@@5:
cmp al, 'S'
jnz @@6
or bl, LeftShift
jmp @@1
@@6:
cmp al, 's'
jnz @@7
or bl, RightShift
jmp @@1
@@7: pop ax
jmp @Err
@@9:
mov cs:HotKey, bl
pop ax
mov cs:AuxHotKey, 2dh ; 'X' scan key
cmp al, '1'
jz @@29
mov cs:AuxHotKey, 0
@@29:
cmp cs:Self, 0
jz @@30
push es
mov es, cs:Self
mov es:HotKey, bl
mov bl, cs:AuxHotKey
mov es:AuxHotKey, bl
pop es
@@30:
call GetRunFileName
mov ax, 3d02h
int 21h
jc @@10
push cs
pop ds
mov bx, ax
mov cx, 4
mov dx, 100h
mov ah, 40h
int 21h
jc @@10
mov ax, 4200h
xor cx, cx
mov dx, 17h
int 21h
jc @@10
mov cx, 1
mov dx, offset AuxHotKey
mov ah, 40h
int 21h
jc @@10
mov ah, 3eh
int 21h
@@10:
ret


; -----------------------------------------------------------------------
GetRunFileName:
; Return:
; DS:DX Pointer of this run file name ASCIIZ string
push ax
push bx
push cx
push si
push di
push es

push cs
pop es
mov ax, es:[2ch]
mov es, ax
xor di, di
mov cx, 1000h
xor al, al
@@1: repnz scasb
cmp es:[di], al
loopnz @@1
mov dx, di
add dx, 3
push es
pop ds

pop es
pop di
pop si
pop cx
pop bx
pop ax
ret

; ---------------------------------------------------------------------------
GetMachineID:
push es
mov KBD102,True
mov ax,40h
mov es,ax
test byte ptr es:[96h], 00010000b
jnz @@1
mov Kbd102,False
@@1:
xor ax,ax
dec ax
mov es,ax
mov al,es:[0eh]
mov cs:MachineID, al
pop es
ret

; ---------------------------------------------------------------------------
ModifyHotKeyPrompt:
cmp cs:Kbd102, True
jz @@9
push cs
pop es
push cs
pop ds
mov cx, 124
mov si, offset KMsg2
mov di, offset KMsg1
rep movsb
@@9: cmp cs:MachineID, 0fch
jna @@10
mov cs:clsStrcolor, 70h ; Mono
mov cs:clsStr, 70h
@@10:
ret

; ---------------------------------------------------------------------------
PrintHotKeyPrompt:
Print Msg1
mov al, cs:HotKey
mov ah, al
shr al, 1
shr al, 1
and ax, 33ch
or al, ah
mov dx, offset KeyMsg
@@40:
or ax, ax ; Mr. Lei 4/25/1993
jz @@_42
shr al, 1
push ax
jnc @@41

push ax
call ColorDisplayStr
; mov ah, 9
; int 21h
pop ax

or al, al
jz @@42

push dx
mov dx, offset PlusMsg
call ColorDisplayStr
; Print PlusMsg
pop dx

@@41: add dx, 12
pop ax
jmp @@40
@@42: pop ax
@@_42: cmp cs:AuxHotKey, 0
jz @@43 cmp cs:HotKey, 0 ; Mr. Lei
jz @@_43
mov dx, offset PlusMsg
call ColorDisplayStr
; Print PlusMsg
@@_43: mov dx, offset AuxHotKeyName
call ColorDisplayStr
; Print AuxHotKeyName
@@43:
Print crlf
ret

ColorDisplayStr:
push bx
push cx
push dx
push si
mov bl, 0fh
mov si, dx
xor bh, bh
mov cx, 1
@@1: lodsb
cmp al, '$'
jz @@2
or al, al
jz @@2
push cx
mov ah, 09h
int 10h
mov ah, 3 int 10h
inc dl
mov ah, 2 int 10h
pop cx
jmp short @@1
@@2:
pop si
pop dx
pop cx
pop bx
ret

; ---------------------------------------------------------------------------
CmpSideKick:
xor ax, ax
mov es, ax
les bx, es:[20h]
cmp word ptr es:[bx-4], 4b53h
jnz @@1 cmp word ptr es:[bx-2], 4942h
jz @@2
@@1: mov es, ax
les bx, es:[94h]
cmp word ptr es:[bx-2], 4b53h
jz @@2
ret
@@2: or cs:Status, SKbit
ret

; ---------------------------------------------------------------------------
CmpDosVer: mov ah, 30h
int 21h
cmp al, 3
jb @@1 cmp al, 3
jna @@2
mov cs:cvtOfs, 1
ret
@@2: mov cs:cvtOfs, 0
ret
@@1: Print DosVerErr
mov ax, 4cffh
int 21h

DosVerErr db 'Sorry, DOS version too lower !',0dh,0ah,'$'

HotKeyValid:
cmp cs:HotKey, 0
jnz @@_1
cmp cs:AuxHotKey, 0
jnz @@_1
Print HotKeyErr
mov ax, 4cfeh
int 21h
@@_1: ret

HotKeyErr db 'Sorry, please setup hotkey again. ',0dh,0ah,'$'

eof:
ends
end Start

; ------------- The End ! ---------------------------------------------------

 

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