Originally Posted by nas_matko
Thank you for the link.
However it's bit too theoretical, what I am looking for is some step by step guide how to prepare epub document readable on Sony psr-505 form source text. And of course some software preferably freeware to do it with.
That chapter described a decision made by Adobe when they implemented ePub in ADE.
The "page", unless you have that proprietary page map resource, is a chunk of data, a predetermined number of characters. The bigger the font, the more screenfulls of text will it take to display such a "page". The start of that "page" is marked by the page number on right side of the screen, the "feature" that is almost universally disliked on this forum (do a search).
For most of us who don't want to use that proprietary Adobe extension, our ePub's behave the way you described it. I am unaware of any tools that can automate creation of page map resource (Adobe Insight, maybe?).
From what I know, the page map resource is the only way how you can control the page size on ADE. That chapter in the book is the only (and too short, if you ask me) description of that feature.