IO71 and IO71ASC

	These are the transfer programs that operate in the PC.  They perform
the same function. The difference between the two is that IO71 was written
specifically for use with Maptech cogo files.  IO71ASC works with generic
ASCII coordinate files.  If you are not a Maptech user, you will have no
use for IO71.

	In order for these programs to operate, it is necessary for the
HP-71 to be connected to an Oregon Digital box with a serial port, and the
HP-71 must be running the program PCX.  The two computers must have a direct
serial connection.  They will not be using HP-IL, and an HP-IL/RS-232-C
interface will not help.  This software was designed to work with Super
Surveyor files, but it will also work with any HP-71 Surveying Pac
coordinate files and any HP-71 text files.

	Coordinates that are brought into the PC are stored in a new file.
If you wish to add them to an existing file, you must merge them using some
other file management software.  Any elevations equal to zero or less than
-100 will automatically be converted to a null elevation.  Text files and
Autostake figures may also be transferred.  The Autostake figures are kept
in files separate from the coordinate file.  Super Surveyor print files may
be transferred as text files.  You will have the option of printing any
incoming data.

	When the program is started, you will be prompted for the COMM port.
Start PCX on the HP-71 before proceeding any further.  On the prompt, touch
any key and give the computers a few seconds to connect.  A menu will
appear on the screen.  Just follow the prompts.
PCX

	PCX is a program to be run in the HP-71 in conjunction with IO71.EXE
or IO71ASC.EXE, which run on the PC.  PCX was designed to work principally
with Super Surveyor coordinate and descriptor files, but it will also
transfer Hewlett-Packard coordinate files with no descriptors.  Also, it
will tranfer Autostake alignment figures and it will tranfer ASCII text
files.  Since Super Surveyor print files are text files, they can be
archived using PCX.  HP-71 BASIC programs can be transformed into text
files and tranferred to the PC for storage.

	PCX uses serial communication, not HP-IL, so it is necessary to be
equipt with an Oregon Digital box with a serial port.  The HP-IL/RS-232-C
interface will be of no use.  To start the program enter "RUN PCX" at the
BASIC prompt.  At this point control will be transferred to the PC.

	There is no point protection built into this program, so it is up to
the user to take precautions.  Coordinate files must be large enough to
accomodate incoming points.  The file will not be expanded automatically.
When Autostake figures are sent to the PC, They will be stored in a
separate file not attached to any coordinate file.  When they are sent back
to the HP-71, they must be sent to an existing coordinate file.  Again, be
careful, because they will overwrite any existing figures attached to that
file.
TRANSFERRING PROGRAMS

	The most efficient way to store HP-71 programs is with a 9114
portable disk drive.  If this is not available, the programs can be
transformed into text files and transferred between the HP-71 and the PC
using PCX.

	To transform a program into text, Use this syntax:

	TRANSFORM (program name) INTO TEXT

			or

	TRANSFORM (program name) INTO TEXT (new text file name)

	When a program has been sent from the PC to the HP-71, it is in text
format.  This is the syntax for transforming it back into BASIC format:

	TRANSFORM (text file) INTO BASIC

			or

	TRANSFORM (text file) INTO BASIC (new program name)

	This still leaves you with an obvious dilemma.  How do you transfer
PCX itself into the HP-71?  Included in these instructions is a printed
listing of an HP-71 program called LOAD.  It is a crude program with only
one function, to load PCX into the HP-71.

	Clear the screen on the HP-71.  If the "user" flag is on, turn it
off.  Type "EDIT LOAD", then enter every line of LOAD exactly as it is
printed.  Each space and punctuation mark is important.  When you finish,
copy the files LOAD.EXE and PCX onto the current directory of the PC.  On
the HP-71, enter "RUN LOAD".  On the PC, enter "LOAD".  On the PC, you will
be asked which serial port is being used.  Enter 1 or 2.  If all of the
hardware is properly configured, you should see the program scroll past on
the screen.  When it is finished, enter "TRANSFORM PCX INTO BASIC" on the
HP-71.  The transformation will take a minute or so.

	LOAD.EXE, like LOAD, has now served its only function, which is to
load PCX.  It can now be deleted, but keep a copy of it, and keep the
printout of LOAD.  You will need them in the event of a memory loss.  If
you have an isolated freeport in the HP-71, that would be the safest place
to store PCX or LOAD.
LOAD

	This is a listing of the HP-71 BASIC program LOAD:

	10 DESTROY ALL 
	20 DIM Q$[120]
	30 T$=CHR$(13)&CHR$(10)
	40 SETUP 2400,30,10,0,1,T$
	50 Q$=""
	60 CREATE TEXT PCX
	70 ASSIGN #3 TO *
	80 ASSIGN #3 TO PCX
	90 Q$=SERIAL$(120,"+")
	100 IF Q$="" THEN 90
	110 IF Q$="?" THEN 140
	120 PRINT #3;Q$
	130 GOTO 90
	140 ASSIGN #3 TO *
	150 END ASCII COORDINATE FILE

	The coordinate file used with IO71.ASC will have this generic ASCII
format:

	(point #), (northing), (easting), (elevation), (descriptor)

	The fields may be any length, but they must be separated by commas.
Point numbers must be integers.  There must be a comma after the elevation,
even if there is no descriptor.  Null elevations are expressed as -9999.