why region parameter is multiple of 4 ?
why it is rounded to nearest 4 multiple?
valueK
Specifies the required storage in kilobytes (1 kilobyte = 1024 bytes). The value is 1 through 7 decimal numbers, from 1 through 2096128. Code a multiple of 4. For example, code REGION=68K. If the value you code is not a multiple of 4, the system will round it up to the next multiple of 4.