![]() ![]() See Anti Virus Programs for more about this. Because they are in this Boot Sector (Boot Sector Virus) many Virus Programs will not detect them. Beware that some types of Virus or Worms also can use this memory. In that case, running CHKDSK at the prompt will show a Total Conventional Memory of less than 655360 Bytes. Some other devices such as SCSI Drives may also use such memory. Some programs such as Hard disk Overlays (EZ-BIOS is one) use memory that is not reported by the DOS commands. NOTE: Total Conventional Memory is normally 655360 bytes. Different Memory Manager programs are designed to use these different specifications.īecause of this variety, computers and DOS do not come with these types of memory enabled as a rule. Today these are provided by programs that create them out of the existing memory. Thus, with the increase of the available memory, the Random Access Memory (RAM) above 640kb was defined as " High Memory".Īs extra memory was available 2 specifications of add on cards were brought to the market, XMS and EMS. Although the memory chips have no preference, the original DOS programs were designed to work in an environment up to 640kb ( Conventional Memory). When the computer starts, the memory is divided into 2 distinct regions. ![]()
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