Data I/O 298 Manual page 133

NULL DEFINE Command
Operation: NULL DEFINE
Code: ND
Syntax:
(>)
[N] [D] [Decimal Number of Nulls] [CR]
Explanation: This command allows choice of sufficient
nulls for the terminal to recover at the end of
a line of output data. Any number from
0
up
to 254 may be entered. Default Value-1 null.
A carriage return and a line feed always
precedes the nulls for null counts values from
O to 254. However, a null count of 255 (FF
hexadecimal) is used to specify a single
carriage return without a linefeed and without
any nulls.
NOTE
The number of output nulls in effect
does not change upon entering or exiting
remote control.
RECORD SIZE Command
Operation: RECORD SIZE
Code: RS
Syntax:
(>)
[R] [S] [Decimal Number of Bytes] [CR]
Explanation: This command sets the number of bytes per
output record for those formats which allow
variable record lengths. Any number up to
255 may be entered. Default Value-16 bytes
per record
(8
bytes per record in Fairchild
Fairbug).
NOTES
1. The record size in effect does
not change upon entering or exiting
remote control.
2. When you change from one
translation format to another, the
record size in effect remains the same,
unless you change to Fairchild
Fairbug, which has mandatory 8-byte
records.
SELECT ONE STOP BIT Command
Operation: SELECT ONE STOP BIT
Code: OS
Syntax:
(>
l
[OJ [SJ [CR]
Explanation: This command sets one stop bit for serial
data transfers. Default Value - programmer's
stop-bit-switch setting.
SELECT TWO STOP BITS Command
Operation: SELECT TWO STOP BITS
Code: TS
Syntax:
(>
l [T] [SJ [CR]
Explanation: This command sets two stop bits for serial
data transfers. Default Value - programmer's
stop-bit-switch setting.
DEFAULT STOP BITS Command
Operation: DEFAULT STOP BITS
Code: DS
Syntax:
(>
l
[DJ [SJ [CR]
Explanation: This command returns the programmer to the
stop-bit default value, which is the
programmer's stop-bit-switch setting.
TRANSLATION FORMAT Command
Operation: TRANSLATION FORMAT
Code: FM
Syntax:
(>)
[F] [M] [Control-Format Code] [CR]
Explanation: This command selects the translation format
for serial 1/0 data transfer. The one digit
Instrument Control code and the two-digit
translation-format codes are listed in
Appendix A. Default Value - ASCII-HEX
(Space), format code 50.
NOTE
The translation format in effect does not
change upon entering or exiting remote
control
VIRTUAL MEMORY OFFSET Command
Operation: VIRTUAL MEMORY OFFSET
Code: VM
Syntax:
(>)
[VJ [M] [Offset] [CR]
Explanation: The offset value redefines all programmer
RAM addresses. Thus, RAM Address 0
becomes equal to the offset, address 1
becomes the offset plus 1, address 2
becomes the offset plus 2, etc. These new
addresses are used in the Memory Mode, and
are also used in place of an address offset in
I/
0
data transfers.
Thus for data translation using terminal
remote control VM has two meanings. First it
defines the address value of the lowest RAM
location or the RAM offset. Second it defines
(and is used in place of) the I/
0
address
offset (equivalent to the port address for
keyboard operations). However, the 1/0
address offset is undefined and assumes a
value equal to zero for those formats which
don't send address information as part of
data translation. Therefore, there is effectively
no
I/
O address offset regardless of the value
B-12
10-990-0013