what is the maximum amount of ram that the original pc processor could access
Conventional memory The 640 KB barrier is an architectural limitation of IBM and IBM PC compatible PCs. The Intel 8088 CPU, used in the original IBM PC, was able to address 1 MB (220 bytes), since the chip offered 20 address lines.
1 + 2 + 3 + 4 + ⋯ which increases without bound as n goes to infinity. Because the sequence of partial sums fails to converge to a finite limit, the series does not have a sum.
Capability Maturity Model Integration Maturity Level 5 - Optimizing
Limit of a function (the Dirichlet function) has no limit at any x-coordinate.