DEC VT100/220 line wrapping semantics sought

Antonio Carlini a.carlini at
Mon Jan 2 12:34:52 CST 2017

On 02/01/17 15:45, Noel Chiappa wrote:
> Even at 1K pages, it shouldn't be anything like that big, if scanned using
> the most space-efficient encoding.
> For _manuals_, scan at 300 dpi with Black+White encoding (i.e. 1 bit per
> pixel), then store as TIFFs with CCITT Group 4 (fax) compression. That does a
> typical page of text in ~45KB or so. So you're about an order of magnitude
> high....

This manual (which is Rev C 14-APR-1989, and so 2 years older than the 
one Al has made available) was scanned in 2002.

Back then I had access to a Lexmark something or other. The only thing 
I'm certain of is that it was scanned at
600x600 dpi, B&W.  I can't see the point in dropping to 300 dpi for B&W 
... 400MB will be the average size of a
two page CV written in Word 20 years from now :-) For those who care, 
it's easier to convert from 600dpi to
300dpi than the reverse.

Back then I would use Adobe to convert to CCITT G4 encoded TIFF and 
repackage as PDF. (The current scanner
does that for me, or so it seemingly claims).

Maybe I forgot that step for this one. I do know that this one (and the 
VAXBI STD) both had pages that were
sticking together by the time they came to me, so I had to separate them 
all manually before scanning.
They are probably nowhere near as clean as a typical manual.

Picking on a few random samples and comparing to what I'm getting out of 
the current scanner I can use,
I see a range from 240KB/page to 390KB/page. So I don't think I missed 
out a step after all: I think it's in line
with what I generally see coming out of the scanner(s).


Antonio Carlini
arcarlini at

More information about the cctech mailing list