🚀 go-pugleaf

Two software puzzles on a Masscomp 5600 RTU 4.0a:

1)	Is it possible to keep an "open" to an HPSM tty 
port from blocking indefinitely if there is no physical 
connection to the port?  Setting O_NDELAY doesn't do the
job.  The manual says setting O_NDELAY causes a return
w/o waiting for carrier. Is this a bug? 

2)	I recently tried to port a graphics program to
Masscomp that uses the standard Unix plotting library
(plot or libplot) to generate a metafile that can then
be piped to various devices (plot and graph would make
use of this library).  Unfortunately, it appears
that Masscomp has replaced this library with sp-45 which
not only fails to have identical calls to the standard
library, but in addition are so high level that the calls
cannot be replaced with similar sp-45 calls.  I am 
especially interested in:
	openpl()
	erase()
	space()
	label()
	linemod()
	cont()		these two are the
	move()		most important.

Is anyone aware of the existence of the standard library for 
Masscomp and is it available?  

Melora Park
Woods Hole Oceanographics Institution
Woods Hole, MA  02543
(508) 548-1400 x2677

mpark@red.whoi.edu


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