First post, by n1mr0d
In the past i used to collect computer viruses, and recently i found my virus archive disk. On it were 2 boot sector files of disks infected with the infamous Ping Pong virus, which i caught in the wild. If you boot from an infected disk, a lozenge appears that bounces off the walls of the screen.
One curiosity of the virus is that it only runs on 808x machines, because of the MOV CS,AX instruction, which is illegal on later processors (crashes). I tried to boot the sector (and a floppy image with the sector) with the BOOT command, but unfortunately dosbox crashed immediately.
I thought that correctly emulating this would prove that dosbox is coming close to the real thing. For those who want to dabble around with/analyse it, i attached the virus and (dis)assembly file.