||ADR||HEXADR||NAME||Description||OS
|740|$02E4|RAMSIZ|RAM Size, high byte/number of pages|both

RAM size, high byte only; this is the number of pages that the top of RAM represents (one page equals 256 bytes). Since there can never be less than a whole page, it becomes practical to measure RAM in those page units. This is the same value as in [RAMTOP] location 106 ($6A), passed here from [TRAMSZ], location 6. Space saved by moving [RAMSIZ] or [RAMTOP] has the advantage of being above the display area. Initialized to 160 for a 48K Atari.

see also: [RAMTOP]