EDSUB.OBJ is a compiled disassembly of the $EDMSG SYSLIB routine as
packaged with P/OS V2.0a.  THe routine will also be familiar to RSX
programmers.  The only change is to the FEAT$ call (which is not available
under RT-11); but the only effect of this is to always print file version
numbers in decimal, not octal, when the %X format is used.  Since RT-11
does not have version numbers anyway (unless one customizes it), this
should not be a problem.  P/OS V3.2 is public-domain and available for
download at ftp.update.uu.se/pub/professional

Briefly, $EDMSG formats output in the user's choice of various decimal,
octal, Radix-50, ASCII, filename, date and other formats, specified by the
percent (%) sign followed by an optional count and the letter for the
desired format.  Many examples of how to use $EDMSG can be found by
dumping PIP.TSK (around block 43, depending on the version) e.g. in
RSX or P/OS:

$ DUMP/ASC/LOW/BL:43 PIP.TSK

To use $EDMSG under RT-11, use the exact same calling sequence as in P/OS
or RSX and then just .PRINT the .ASCIZ string that $EDMSG produces. 

Link your program as follows (MYPROG is your program):

.LINK MYPROG,EDSUB

 or

.R LINK
*MYPROG=MYPROG,EDSUB
^C

Example program:

	.mcall	.print, .exit
outbuf:	.blkb	82.		; $EDMSG output goes here; make sure it's
				; big enough for max. # chars printed
fmt:	.asciz	/$EDMSG Test.  Monitor base address is %P/
				; $EDMSG copies all text verbatim to
				; output buffer except % formatters, which
				; are replaced with formatted data from list
list:	.blkw	1		; As many words as required for data list
start:	mov	#outbuf,r0
	mov	#fmt,r1
	mov	#list,r2
	mov	@#54,@r2
	jsr	pc,$edmsg	; R0 <- next free char in outbuf, R1 <- length
				; R2 destroyed, R3-R5 preserved.
	.print	#outbuf		; Print the .ASCIZ string $EDMSG generated
	.exit
	.end	start

For more information on $EDMSG, log onto an RSX system and type

HELP SYSLIB EDMSG

at the MCR or DCL prompt.  There is a public-access PDP-11 running
RSX-11M+ at telnet://magica.update.uu.se (Use the "guest" account).

RT-11 may be purchased from Mentec at http://www.mentec.com and a PDP-11
emulator for the PC may be found at ftp://ftp.dbit.com/pub/e11

Disclaimer:  This software is provided for convenience only and is not
warranted by anyone, nor is it supported by DEC or Mentec.  P/OS V2.0a is
Copyright 1984 by Digital Equipment Corporation but released into the
public domain.

Last update:  22-Mar-1998