Keyboard Edit Operations; Hexadecimal Base - Data I/O 298 Manual

3.7 KEYBOARD EDIT OPERATIONS
The EDIT key allows the operator to change the stored
data at a specified RAM address. The data may be
presented in either binary, octal, or hexadecimal, as
determined by a select code ( F5, F6, or F7 respectively).
The programmer automatically comes up in hexadecimal,
which is the default condition. However, if either octal or
binary is desired, it may be selected using the applicable
select code.
If edit addresses are outside the range of the device
addresses two asterisks
(**)
are displayed for the device
data.
Since the display varies when an edit operation is
performed in the three numbering systems an example of
each is given below.
NOTE
The symbols H, Q, or 8 are used in
subsections 3. 7. 1 through 3. 7.3 to denote
hexadecimal, octal, or binary numeric
characters. Therefore, an "H" symbol on
a key means the operator can press any
key on the numeric key pad. A "8"
symbol implies only fJ or 1 can be
pressed, since binary values are
composed of only (J's and 1's.
3.7.1 HEXADECIMAL BASE
Use the following procedure to edit data in a RAM address
when the hexadecimal base has been selected, either by
select code F7 or default:
1.E?=J
to select the operating mode.
298 Displays
(EIJI T RIJIJR
I\
HHHH )
2.
3.
E?:i
GGEH:J
hex address to be edited.
298 Displays
(EIJIT RIJIJR
I\
HHHH )
entered hex address.
E4
G
298 Displays
(HHHH IJHH,,RHH
)
The "HHHH" in the display represents the hex address
in RAM to be edited. The device data is represented by
the "DHH" symbols; The "D" representing the device
and the "HH" the hex data in the device at the address
defined. The RAM data to be edited is represented by
the symbols
"A.
RHH." The prompt symbol
"A."
to
show that this data can be edited, the "R" to show it is
in RAM, and 'HH' to show the hex value of the data
presently entered in that RAM address.
NOTE
When the 298 initially powers up, device
data is undefined since the device
family I pinout code is also undefined.
Therefore; under these conditions the
edit command will show "D**". After a
device type has been defined (usually as
the result of a copy or verify device
operation) device data can be compared
with RAM data; however, device data is
only shown for the block of data
beginning at the begin RAM address and
with a length equal to the device size
minus the begin device address.
The prompt (
A. )
after "ADDR" in the display means
that you can change the RAM address to be edited by
entering any hex address within the range of the RAM.
The "HHHH" in the display represents the last hex
address edited (power-up default is 0000).
4.
E::i
a. If the hex value address displayed is correct go to
step 3.
b. If it is not correct go to step 2.
3-16
10-990-0013
hex data to be entered in RAM address.
298 Displays
new data is displayed following the
A.
R.