Why Data Page Save Some Free Space?

Hello guys.

I want to konw how many rows a data page could contains.

So i do some test to prove it.

The follow sql scripts i used:



create table table1

(

col1 char(2)

)

go

declare @a int

set @a=0

while @a<700

begin

insert into table1 values('aa')

set @a=@a+1

end



I add 700 recrods to table1,then use dbcc page command oversee the data page.

The result indicate that:the whole recrods are all in one data page,and the "m_freeCnt" flag equal 396.
(8192-96-700*9-700*2=396)So i think i can add more records to the data page.To my surprise, after i add a new record, sql server 2005 allocates a new data page and assign the recrod to the new space....

any suggestion?