Technical data

ACCU contents before writing:
Result •• If the data is written to the page correctly:
-
ACCU 1 and ACCU 3: remain unchanged.
-
ACCU-2-L: contains a value incremented by 1,
2 or 4 (depending on the length of
the data transferred)
-
RLO: = 1
-
the remaining bit and
word condition codes:
are cleared
•• If the data cannot be written to the page
-
all ACCUs: remain unchanged
-
RLO: = 0
-
all remaining bit and
word condition codes:
are cleared.
ACCU 4
ACCU 3
ACCU 2
ACCU 1
High byte Low byte Low byteHigh byte
High word Low word
xx xx
Length ID Page number
0 to 255
xx
Address (relative to start of page)
x
x
31 2324 16
data (8 bits)
data (16 bits)
data (32 bits)
x
x
0 ... 2046 if length ID 1 (word)
0 ... 2047 if length ID 0 (byte)
0 ... 2044 if length ID 2 (double word)
0: byte (8 bits)
1: word (16 bits)
2: double word (32 bits)
87 015
Fig. 6-13 ACCU contents before calling OB 216
6
OB 216 to OB 218: Page Access
CPU 928B Programming Guide
C79000-B8576-C898-01
6 - 83