Computer Viruses: A High-tech Disease
This work starts with a short history of computer viruses, and describes how a virus can take hold of a PC. Also includes information on the creation and removal of computer viruses plus several rudimentary programs that demonstrate some of the ways a virus infects a PC.
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1AAF 2nd User Program 49 PRINT assembly language B:LOCATE batch file buffer bytes free carrier program catalog CD21 INT Cohen COLOR A2 command COMMAND.COM computer system computer viruses CP/M created damage danger DEBUG demo developed disk access DISKCOPY EDLIN error message example functions GOSUB GOSUB 4480 COLOR GOTO hackers hard disk hardware host program infected program input installation int 21h interrupt keyboard lea dx mainframes manipulation task Marker byte memory mov ah MS-DOS OOO O63 OOO OOO OOO operating system ēr ēr ēr password path personal computers possible problems processor program code program is started propagation S9S+CHRS 13 second user program software houses source code subroutine Usepath vector VIRDEM.COM virus attack virus marker virus programs write write-protected