Single event data logger wth LCD

[skimask]

I don't understand your reply and is it not possible to impliment solution with a single chip?
Do a 16F84 not have enough data space?
Rgds

Sure it do (does...) have enough data space...
If you want to record 64 events, each of which are only one byte wide data, or 32 events of 2 byte data, or 16 events of 4 byte data, or 8 events of 8 byte data, or 4 events of 16 byte data, or 2 events of 32 byte data, or one event of 64 byte data.
See where I'm going with this?
We don't know: what you are logging (A) and how often you are logging it (B).
A x B = total data space required.

Some simple math and a quick trip to the datasheets will answer all your questions.