Versions
With the exception of the assemblers for the IBM System/360 Model 20 the IBM assemblers were largely upward-compatible. The differences were mainly in the complexity of expressions allowed and in macro processing. OS/360 assemblers were originally designated according to their memory requirements.
Read more about this topic: IBM Basic Assembly Language
Famous quotes containing the word versions:
“The assumption must be that those who can see value only in tradition, or versions of it, deny man’s ability to adapt to changing circumstances.”
—Stephen Bayley (b. 1951)