Ram - Sharp PC-1211 Service Manual

7
Although RAM area is mainly shared by the program, data
and reserve program memories, it is also used for the sub-
routine stack, FOR NEXT statement stack and fixed
memories (W, X, Y, Z).
1536
1472
1504
001
048
(PC1211)
Reserve program
-------
- -
- -
-
--
Program
or
flexible memory
~------
-------
Fixed memories (W - Z)
Subroutine
I
FOR NEXT
stack statement
stack
A certain number of C-MOS RAM
(1 -
3 chips, 4K bits each) and another RAM incorporated inside
the display chip are used in this pocket computer, having varieties of configurations as described
below:
• Map of 4K-bit RAM
1536 Bytes
2-2.
RAM
en
nd
;e)
II
he
le-