Asp Forum - ?????????? int21 - ntu-kpi.comp.programming

517

3/24/2005 5:47:00 PM

iOOII IA?EOAOO ?OIEAEA, EIOIOAN O?EOAIA AU EIIE?AOO?I ?UUI?I? 21-CI
?OAOU?AIEN. n UOI AAIAA OAEEI IAOAUII:

volatile int DosIntrCalls=0;

void interrupt (far * OldInt21) (...);

void interrupt far MyInt21(...){
DosIntrCalls++;
(*OldInt21)();
// _chain_intr(OldInt21);
}

void main(){
OldInt21=_dos_getvect(0x21);
_dos_setvect(0x21,MyInt21);
asm {
mov ah, 0x2C;
int 0x21;
mov ah, 0x2C;
int 0x21;
}
_dos_setvect(0x21,OldInt21);
printf("Interrupt 21h was called %d times.\n", DosIntrCalls);
getch();
}

?I?AIO-OI IIA ?UIAOAAO (?OE??I ? OAUIUE IAOOAE). aOIE AOAOO 9-A
?OAOU?AIEA - OAAIOAAO IOIE?II...
aOOO ?IAIUOAIEA, ?OI UOI EU-UA OICI, ?OI ?OIEAEN _dos_setvect OAIA
EO?IIOUOAO int21.
?OICO OAOOA ?IA ÷EI98, UA?OOEAA EU-?IA BC++ 3.1

7 Answers

zerg

3/24/2005 8:12:00 PM

ËÏÎÅÞÎÏ ÉÓÐÏÌØÚÕÅÔ - ÜÔÁ ÆÕÎËÃÉÑ ÖÅ ÐÏÌÕÞÁÅÔ ×ÅËÔÏÒ ÐÒÅÒÙ×ÁÎÉÊ - ÐÏÉÞÁÔÁÊ
ÁÂÅÌÑ!!

> volatile int DosIntrCalls=0;
>
> void interrupt (far * OldInt21) (...);
>
> void interrupt far MyInt21(...){
> DosIntrCalls++;
> (*OldInt21)();
> // _chain_intr(OldInt21);
> }
>
> void main(){
> OldInt21=_dos_getvect(0x21);
> _dos_setvect(0x21,MyInt21);
> asm {
> mov ah, 0x2C;
> int 0x21;
> mov ah, 0x2C;
> int 0x21;
> }
> _dos_setvect(0x21,OldInt21);
> printf("Interrupt 21h was called %d times.\n", DosIntrCalls);
> getch();
> }
>
>
> ðÏÞÅÍÕ-ÔÏ ÏÎÁ ×ÙÌÅÔÁÅÔ (ÐÒÉÞ£Í × ÒÁÚÎÙÈ ÍÅÓÔÁÈ). åÓÌÉ ÂÒÁÔØ 9-Å
> ÐÒÅÒÙ×ÁÎÉÅ - ÒÁÂÏÔÁÅÔ ÏÔÌÉÞÎÏ...
> åÓÔØ ÐÏÄÏÚÒÅÎÉÅ, ÞÔÏ ÜÔÏ ÉÚ-ÚÁ ÔÏÇÏ, ÞÔÏ ÆÕÎËÃÉÑ _dos_setvect ÓÁÍÁ
> ÉÓÐÏÌØÚÕÅÔ int21.
> ðÒÏÇÕ ÔÅÓÔÀ ÐÏÄ ÷ÉÎ98, ÚÁÐÕÓËÁÀ ÉÚ-ÐÏÄ BC++ 3.1

Moderator

3/24/2005 8:17:00 PM

Thu, 24 Mar 2005 20:12:05 +0000 (UTC)
"zerg" <zerg@9ka.kiev.ua>

uAIA?AIEA [*] -- EUAUOI?IIA AEOEOI?AIEA.

* On Thu, 24 Mar 2005 20:12:05 +0000 (UTC) you wrote:

> EIIA?II EO?IIOUOAO - UOA ?OIEAEN OA ?IIO?AAO ?AEOIO ?OAOU?AIEE - ?IE?AOAE
> AAAIN!!

> > volatile int DosIntrCalls=0;
> >
> > void interrupt (far * OldInt21) (...);
> >
> > void interrupt far MyInt21(...){
> > DosIntrCalls++;
> > (*OldInt21)();
> > // _chain_intr(OldInt21);
> > }
> >
> > void main(){
> > OldInt21=_dos_getvect(0x21);
> > _dos_setvect(0x21,MyInt21);
> > asm {
> > mov ah, 0x2C;
> > int 0x21;
> > mov ah, 0x2C;
> > int 0x21;
> > }
> > _dos_setvect(0x21,OldInt21);
> > printf("Interrupt 21h was called %d times.\n", DosIntrCalls);
> > getch();
> > }
> >
> >
> > ?I?AIO-OI IIA ?UIAOAAO (?OE??I ? OAUIUE IAOOAE). aOIE AOAOO 9-A
> > ?OAOU?AIEA - OAAIOAAO IOIE?II...
> > aOOO ?IAIUOAIEA, ?OI UOI EU-UA OICI, ?OI ?OIEAEN _dos_setvect OAIA
> > EO?IIOUOAO int21.
> > ?OICO OAOOA ?IA ÷EI98, UA?OOEAA EU-?IA BC++ 3.1

--
With Respect, ICQ# 34006064 ftp://reali...
Yuriy [haze at reality.org.ua] [Ahraywah Ohmankogah Skeeda]

np: . Van Der Graaf Generator - [Godbluff] - The Undercover Man [07:24]

Neket

3/24/2005 11:02:00 PM

zerg wrote:
> EIIA?II EO?IIOUOAO - UOA ?OIEAEN OA ?IIO?AAO ?AEOIO ?OAOU?AIEE - ?IE?AOAE
> AAAIN!!

a EAE OICAA ?IOOA?EOO A? IAOAAIO?EE? (aOIE AOAAUO ?IOUIAOO ? aAAIN -
OEAOE CIA?O ?IU)

Chapaev

3/25/2005 7:23:00 AM

> á ËÁË ÔÏÇÄÁ ÐÏÓÔÁ×ÉÔØ Å£ ÏÂÒÁÂÏÔÞÉË? (åÓÌÉ ÂÕÄÅÛØ ÐÏÓÙÌÁÔØ × áÂÅÌÑ -
> ÕËÁÖÉ ÇÌÁ×Õ ÐÌÚ)
sub ax,ax
mov ds,ax
mov ax,seg myproc
mov word ptr ds:[21h*4+2],ax
mov ax,ofs myproc
mov word ptr ds:[21h*4],ax
þÔÏ-ÔÏ ×ÒÏÄÅ ÜÔÏÇÏ, ÔÏÌØËÏ ÕÔÏÞÎÉ, ÌÅÖÉÔ ÌÉ ÐÏ ÍÌÁÄÛÅÍÕ ÁÄÒÅÓÕ ÓÅÇÍÅÎÔ ÉÌÉ
ÓÍÅÝÅÎÉÅ, Ñ ÎÅ Õ×ÅÒÅÎ, ÞÔÏ ÉÍÅÎÎÏ ÓÍÅÝÅÎÉÅ.

Neket

3/25/2005 12:24:00 PM

Chapaev wrote:

> ?OI-OI ?OIAA UOICI, OIIOEI OOI?IE, IAOEO IE ?I IIAAUAIO AAOAOO OACIAIO EIE
> OIAYAIEA, N IA O?AOAI, ?OI EIAIII OIAYAIEA.

aY? OAIAOAIOII ?IOOA?EOO cli E sti, EOOAOE...

?IOUION ? EIAOA, ?IOIIOOAI, EAE UOI AAIAAO AOOCEA. oAE ?IO, ? EIAA
IAOAAIO?EEA IIE OOA?NO jmp far OldInt21.
a EAE UOI AAIAAOON ? ONE? (?EOAOO ?OA IAAO IA AOIA OAIAIEN EAE-OI IA
?IUIEEAAO). eII?EINOIO IAOAEAAOON OAE: Undefined label OldInt21.

Chapaev

3/25/2005 12:33:00 PM

> åÝ£ ÖÅÌÁÔÅÌØÎÏ ÐÏÓÔÁ×ÉÔØ cli É sti, ËÓÔÁÔÉ...
ïÓÏÂÏÇÏ ÓÍÙÓÌÁ ÎÅ ×ÉÖÕ. èÏÔÑ, ËÏÎÅÞÎÏ, ÓÔïÉÔ ÐÏÓÔÁ×ÉÔØ, ÞÔÏÂ ÂÙÌÏ ËÁË ×
ËÎÉÖËÅ.

> ðÏÒÙÌÓÑ × ÉÎÅÔÅ, ÐÏÓÍÏÔÒÅÌ, ËÁË ÜÔÏ ÄÅÌÁÀÔ ÄÒÕÇÉÅ. ôÁË ×ÏÔ, × ËÏÄÅ
> ÏÂÒÁÂÏÔÞÉËÁ ÏÎÉ ÓÔÁ×ÑÔ jmp far OldInt21.
> á ËÁË ÜÔÏ ÄÅÌÁÅÔÓÑ × ÓÑÈ? (ÐÉÓÁÔØ ×ÓÀ ÌÁÂÕ ÎÁ ÁÓÍÅ ÖÅÌÁÎÉÑ ËÁË-ÔÏ ÎÅ
> ×ÏÚÎÉËÁÅÔ). ëÏÍÐÉÌÑÔÏÒ ÍÁÔÀËÁÅÔÓÑ ÔÁË: Undefined label OldInt21.
jmp dword ptr DS:[OldInt21]
ÍÏÖÅÔ, ÔÁË?

Chapaev

3/25/2005 12:36:00 PM

> > ðÏÒÙÌÓÑ × ÉÎÅÔÅ, ÐÏÓÍÏÔÒÅÌ, ËÁË ÜÔÏ ÄÅÌÁÀÔ ÄÒÕÇÉÅ. ôÁË ×ÏÔ, × ËÏÄÅ
> > ÏÂÒÁÂÏÔÞÉËÁ ÏÎÉ ÓÔÁ×ÑÔ jmp far OldInt21.
> > á ËÁË ÜÔÏ ÄÅÌÁÅÔÓÑ × ÓÑÈ? (ÐÉÓÁÔØ ×ÓÀ ÌÁÂÕ ÎÁ ÁÓÍÅ ÖÅÌÁÎÉÑ ËÁË-ÔÏ ÎÅ
> > ×ÏÚÎÉËÁÅÔ). ëÏÍÐÉÌÑÔÏÒ ÍÁÔÀËÁÅÔÓÑ ÔÁË: Undefined label OldInt21.
> jmp dword ptr DS:[OldInt21]
> ÍÏÖÅÔ, ÔÁË?
èÏÔÑ ×ÒÑÄ ÌÉ. ìÕÞÛÅ ÔÁË:
mov bx, offset OldInt21
jmp dword ptr ds:[bx]
;ÐÒÉ ÕÓÌÏ×ÉÉ, ËÏÎÅÞÎÏ, ÞÔÏ ds ÕËÁÚÙ×ÁÅÔ ÎÁ ÓÅÇÍÅÎÔ ÄÁÎÎÙÈ

ntu-kpi.comp.programming

?????????? int21

517

zerg

Moderator

Neket

Chapaev

Neket

Chapaev

Chapaev

x Login to ForumsZone