Editing Product key (section)

===== RAM bit-field =====
The bit-field related to the amount of RAM available to the operating system is calculated differently from the other bit-fields as shown in the table.
{| class="wikitable"
|+
!Value
!Amount of RAM possible 
|-
|0
|(bit-field is unused)
|-
|1
|Below 32 MB
|-
|2
|between 32 MB and 63 MB
|-
|3
|Between 64 MB and 127 MB 
|-
|4
|Between 128 MB and 255 MB 
|-
|5
|Between 256 MB and 511 MB
|-
|6
|Between 512 MB and 1023 MB 
|-
|7
|Above 1023 MB
|}
Note that the amount of RAM is retrieved by calling the GlobalMemoryStatus() function, which reports a few hundred kilobytes less than the amount of RAM physically installed. So, 128 MB of RAM would typically be classified as "between 64 MB and 127 MB".