| COPYFL |
Copies nonprivate file (named in ALPHA) from master device to
device addressed by number in X. |
| DIRX |
Returns to ALPHA the name of file whose position in primary
medium's directory is specified by number in X. If X exceeds number
of files on medium, DIRX replaces 0 in X
and leaves ALPHA unchanged. |
| FLLENG |
Places in X the length of the file specified in ALPHA. Length
values are interpreted as follows: PR, number of bytes; DA, KE, ST,
and WA, number of registers; AS, undefined; ??, unknown. |
| FLTYPE |
For file named in ALPHA, places in X a two-character ALPHA string
representing the file type, as follows: PR, program; DA, data; KE,
key assignment; ST, status; WA, write-all; AS, ASCII; ??,
unknown. |
| MCOPY |
Copies contents of master medium onto all other media. Places in
X the number of records copied. Ignores any cassette drive having its
door opened prior to execution. |
| MCOPYPV |
Same as MCOPY, except that all HP-41
program files are made "private." |
| MVERIFY |
Checks each mass storage device to verify that number of records
specified in X can be read without error. Ignores any cassette drive
having its door opened prior to execution. |
| ALENGIO |
Places in X the length of current ALPHA string. Skips leading
nulls. |
| ANUMDEL |
Returns to X the value of a number represented by a string of
numerical characters in the ALPHA register. Deletes from ALPHA all
characters from beginning through the numerical character used. |
| ATOXL |
Reverse of XTOAL. Removes first
character from ALPHA and places in X the corresponding character
code. |
| ATOXR |
Reverse of XTOAR. Places character
code of last character of ALPHA string into X and deletes that
character from string. |
| ATOXX |
Replaces number in X with code for character in ALPHA position
indicated by that number (where -24 ≤ |x| ≤ 23, and
any fractional part of |x| is ignored). Does not alter contents of
ALPHA. A positive number in X specifies position from leftmost
non-null character (position 0) in current string. A negative number
specifies absolute ALPHA register position numbered from right. |
| X<>FIO |
Exchanges value in X with decimal equivalent of binary value
represented by flags 00 through 07. Resets these flags according to
value in X when function executed (where 0 ≤ |x| ≤
255, and any fractional part of |x| is ignored).
| Flag |
07 |
06 |
05 |
04 |
03 |
02 |
01 |
00 |
| Value |
128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
|
| XTOAL |
Reverse of ATOXL. Adds to left of
first non-null character in ALPHA the character corresponding to the
character code in X. Original string in ALPHA shifts one space to
right. |
| XTOAR |
Reverse of ATOXR. Appends to end of
current string in ALPHA the character corresponding to character code
in X. |
| YTOAX |
Replaces a character in ALPHA with another character specified by
a character code in Y. Position in ALPHA determined by value in X in
same way as for ATOXX. |
| AID |
Places in X the accessory ID of primary device. |
| CLRDEV |
Resets primary device to its initial state – typically, the
power-on state. |
| CLRLOOP |
Simultaneously clears all devices on loop. |
| DEVL |
Sends to primary device the Device-Dependent Listener command
number specified in X. Command number must be in the range 0
≤ |n| ≤ 31 (and any fractional part of |n| is
ignored). |
| DEVT |
Sends to primary device the Device-Dependent Talker command
number specified in X. Command number must be in the range 0
≤ |n| ≤ 31 (and any fractional part of |n| is
ignored). |
| FINDAID |
Uses accessory ID to locate device of specific class or type.
Returns device address to X. Loop search begins with primary device.
If ID is positive, search continues until specified device is found.
If ID is negative, search continues until address is found for first
device in device class corresponding to absolute value of ID. |
| ID |
Returns to ALPHA a string containing ID of primary device. |
| INAC |
Replaces contents of ALPHA with string of bytes from primary
device. Adds bytes to string until either 23rd byte in sequence is
received or the byte (character) specified in X is received (in which
case the string terminates with byte preceding the byte specified in
X). Clears flag 17 if byte specified in X is received; otherwise sets
flag 17. INAC inserts dummy character "0"
at beginning of string. |
| INACL |
Replaces ALPHA contents with a dummy "0" character and a string
of bytes from primary device. Transmission halts when either a
linefeed – code 10 – is received (which clears flag 17)
or 23 characters have been received (which sets flag 17). Both the
linefeed and any carriage returns (character code 13) are deleted
from the string in ALPHA. |
| INAE |
Replaces ALPHA contents with string of bytes from primary device.
Terminates input when either an End message is received or ALPHA is
filled (24 bytes). Sets flag 17 if End message received; clears flag
17 if ALPHA filled before End received. |
| INAN |
Replaces ALPHA contents with a string of up to 23 bytes from
primary device, and terminates string with dummy "0" character. Value
in X specifies number of bytes to be transmitted from primary
device. |
| INP |
Causes primary device to send to HP-41 a series of bytes that the
HP-41 can translate into a program. First four bytes received
indicate program length in bytes. Last two bytes contain program
checksum. This program replaces last program in memory. |
| INXB |
Directs primary device to send one byte of data to X. |
| LOCK |
If primary device has remote override switch (for manually
placing device into Local mode), disables this switch. Device must
already be in Remote mode. Executing NOTREM cancels LOCK. |
| NLOOP |
Places value in X indicating number of decices currently on
HP-IL, excluding HP-41 itself (and any devices that do not respond to
the Auto-Address message). |
| NOTREM |
Returns devices having Remote and Local modes to Local mode
control, and disables not-remote-enabled state. |
| OUTAC |
Sends all but first non-null character in ALPHA string to device.
Adds to end of string the character specified by the character code
in X. |
| OUTACL |
Sends string in ALPHA – minus first non-null character
– to primary device. Sends carriage return and line feed
following string. |
| OUTAE |
Sends ALPHA string – minus first non-null character –
to primary device. Final character serves as part of the string and
as an End message. |
| OUTAN |
Transmits to primary device up to 23 ALPHA characters, as
specified by value in X (where 0 ≤ |x| ≤ 23, and any
fractional part of |x| is ignored). Leading (first non-null)
character is not transmitted. Using zero (default) in X causes
transfer of all characters following the leading character,
regardless of string length. |
| OUTP |
Sends from HP-41 to primary device the program containing the
global label in ALPHA. Does not send "private" programs. |
| OUTXB |
Sends to primary device the eight-bit byte equivalent of decimal
byte value in X (where 0 ≤ |x| ≤ 255, and any
fractional part of |x| is ignored). |
| POLL |
Sends Identify message around loop and indicates loop's response
by displaying a to 255. Response number is decimal equivalent of the
eight parallel poll bits. |
| POLLD |
Disables parallel poll response of primary device. (Cancels
effect of a previous POLLE directed to
that device.) |
| POLLE |
Enables primary device to respond to a parallel poll. Uses
enable number in X to assign one of the eight parallel poll
bits to device and to specify whether device requests service. Using
an enable number in the range 0 ≤ |x| ≤ 7 assigns bit
number |x| and indicates "Service Not Requested". Using an enable
number in the range 8 ≤ |x| ≤ 15 assigns bit number
(|x| - 7) and indicates "Service Requested". (The fractional part of
any enable number is ignored.) |
| POLLUNC |
Disables parallel poll responses of all devices. |
| RCLSEL |
Returns HP-IL address specified by most recent execution of
SELECT. Address is that of primary device
if (1) 1 SELECT 1 executed since HP-IL module last installed and (2)
loop contains device having selected address. |
| SRQ? |
Tests loop for service request by sending HP-IL Identify message.
When executed in running program, if device responds with service
request, HP-41 executes program line following SRQ? otherwise bypasses program line following
SRQ?. When executed from keyboard, if
device responds with service request, HP-41 displays YES;
otherwise displays NO. |
| STAT |
Reads up to 23 bytes of status from primary device and stores
these bytes as character string in ALPHA. Inserts dummy character
("S" – for "status") at beginning of string. |
| XFER |
Until End of Transmission message received, transfers data from
primary device to the device specified by the HP-IL address in X
(where 1 ≤ |x| ≤ 30, and any fractional part of |x|
is ignored). When executed in a program, End of Transmission message
signals the HP-41 to resume program execution. |
| XFERC |
Transfers data from primary device to device specified by HP-IL
address in X (where 1 ≤ |x| ≤ 30, and any fractional
part of |x| is ignored). Transfer halts after character specified by
code in Y is sent. |
| XFERCL |
Transfers data from primary device to device specified by address
in X (where 1 ≤ |x| ≤ 30, and any fractional part of
|x| is ignored). Transfer halts when linefeed character is sent. |
| XFERE |
Transfers data between primary and another device specified by
address in X (where 1 ≤ |x| ≤ 30, and any fractional
part of |x| is ignored). Transmission ends when primary device sends
End message. |
| XFERN |
Transfers number of bytes specified in Y from primary device to
device at address specified by value in X (where 1 ≤ |x|
≤ 30, and any fractional part of Ixl is ignored). |
| ADROFF |
Disables the automatic loop addressing and talker/listener
commands used by data transfer functions. Sets flag 34. (Does not
affect HP-IL module INA and OUTA functions.) |
| ADRON |
Enables the automatic loop addressing and talker/listener
commands used by data transfer functions. Clears flag 34. (Does not
affect HP-IL module INA and OUTA functions.) |
| DDL |
Sends Device-Dependent Listener command message specified by
value in X to all active listeners (where 0 ≤ |x| ≤
31, and any fractional part of |x| is ignored). |
| DDT |
Sends Device-Dependent Talker message specified by value in X to
currently active talker (where 0 ≤ |x| ≤ 31, and any
fractional part of |x| is ignored). |
| LAD |
Switches to listener the device specified by HP-IL address in X
(where 1 ≤ |x| ≤ 30, and any fractional part of |x|
is ignored). (Sends Listen Address and Ready For Command
messages.) |
| SEND |
Sends to primary device the command message specified by the
command number in X (where 0 ≤ |x| ≤ 255, and any
fractional part of |x| is ignored), followed by a Ready-For-Command
message. (For HP-IL Command Message Table, refer to section 5 of your
I/O module owner's manual.) |
| TAD |
Switches to talker the device specified by HP-IL address in X
(where 1 ≤ |x| ≤ 30, and any fractional part of |x|
is ignored). (Sends Talker Address message to device.) |
| UNL |
Removes all currently addressed listeners from listener status.
(Sends Unlisten message.) |
| UNT |
Removes current talker from talker status. (Sends Untalk message
followed by Ready For Command message.) |
While the HP 82183A Extended I/O Module is plugged into the HP-41, the
following functions are available for your use. All functions are
programmable. Appropriate peripherals must be connected to the
Hewlett-Packard Interface Loop for most of the functions to be executed
normally.