大数据文摘授权转载自程序员的那些事
雷军的代码像诗一样优雅
↓↓↓
有些网友在评论中质疑，说雷军代码不会是“屎”一样优雅吧。说这话的网友，也许是开玩笑的，也许是真没看过雷军写过的代码。
在2011年的时候，我们在微博转过雷军在1994年写的一段完整的汇编代码。雷军这段汇编代码，有程序员评价“如今能写出这么好的代码的程序员恐怕也不多」。
后来雷军在转发我们微博时还补充说：“这个程序第一个版本是我1989年写的，怀念当初写程序的快乐时光。”
之前微博帖子中引用的链接已挂，今天重新在网上找到了完整版，如下：
（在移动端窄屏看大篇幅幅，可能体验不如PC端。大家可以尝试点击右上角的“……”，然后“复制链接”，方便的时候，在PC端看看。）
前方高能……
;
; 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, '