Technical data

How to access pages You can use organization blocks OB 216 to OB 218 and several
STEP 5 operations (see Chapter 9) to access the pages.
The organization blocks contain the following functions:
•• OB 216:
write a byte/word/double word to a page
•• OB 217:
reads a byte/word/double word from a page
•• OB 218:
the CPU occupies a page (used for coordination in multiprocessor
operation)
You can use these functions for test purposes and for programming
handling blocks or similar functions.
Note
Whenever possible, only program access to pages by calling
OB 216 to OB 218. You should only use the available STEP 5
operations if you have considerable experience of the system.
Normally, you can execute all functions using the standard
function blocks "handling blocks" and the integrated function
organization blocks "multiprocessor communication" (OB 200,
OB 202 to OB 205), with which all page access is handled
"automatically".
6
OB 216 to OB 218: Page Access
CPU 928B Programming Guide
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