DEC PDP-11: 330 XXDP listings scanned from micro fiches

Mattis Lind mattislind at
Sat Mar 21 05:03:22 CDT 2015

Fantastic! You have done a great work!

I found the listing for the DGKAB 11/04 trap test that I have been looking


2015-03-21 7:46 GMT+01:00 Jörg Hoppe <j_hoppe at>:

> Hi all,
> Over the last months I scanned micro fiches with XXDP diagnostic program
> listings.
> These listings are essential for repairing PDP-11's (or enhancing SimH).
> I digitized 330 listings from 452 fiches, with a total of 53545 document
> pages.
> Almost all of them should be new stuff.
> The PDFs are ready for download now.
> Until they appear at, you can use my link:
> (Note the embedded user/password strings)
> The scans come in two versions: "high quality" and "black&white":
> The HQ version is gray level and contains a true image of the micro
> fiches, after non-destructive contrast enhancement. It is the base for
> further image processing.
> Download path is ./fichescanner/hq/gh
> The BW version is compressed to black & white and aggressively optimized
> for size and letter quality. File sizes are 20x smaller than the HQ
> version. Its intended for daily use and OCR, but for some very problematic
> fiches textual information is lost.
> Download path is ./fichescanner/bw/gh
> And there is a background article on
> describing the self-build automatic micro fiche scanner (video!)
> Enjoy!
> Joerg

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