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Which manual for HP-48SX?
12-31-2019, 11:02 PM
Post: #21
RE: Which manual for HP-48SX?
(12-31-2019 07:14 PM)EugeneNine Wrote:  There are several errors, some documented here:
https://www.hpcalc.org/hp48/docs/misc/sxmanualerr.txt

I've looked at a few of the early listed errors but for many of them, what's in my copy differs from "NOW READS:". Why is this? For example, the errata has:

Page : # 95
Location: Example of Input to the Command SIZE
NOW READS: 1: 92 x 64
SHOULD READ: 1: Graphic 92 x 64.

My copy has "GRAPHIC 6x12.

Another example: The errata has
Page : # 106
Location: Second and third lines from the top
NOW READS: variable you create along with reserved variables created by the
be empty.)
SHOULD READ: variable you create along with any reserved variables created
by the HP 48 (Your VAR menu may not be empty).

My copy is the same as what's in SHOULD READ.


My copy is the same as the one on the Museum USB, listed as Edition 4, July 1990. Is the Errata based on an earlier edition?

(12-31-2019 07:14 PM)EugeneNine Wrote:  There are several errors, some documented here:
https://www.hpcalc.org/hp48/docs/misc/sxmanualerr.txt

One of my long term projects was to OCR the scans and apply all the fixes.

Can't you edit the PDF files on the Museum USB?

As to the error I found, could it be added to the errata file?
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12-31-2019, 11:27 PM
Post: #22
RE: Which manual for HP-48SX?
It doesn't say if the error is in the two volume or combined dingle manual. I wonder if HP fixed some for the second version. I don't know who made the errata, if it was from HP or compiled by users like us or which manual set the page numbers correspond to, I didn't dig that deep yet.

The PDF's on the museum, when I scanned them all I had access to was Adobe products and the OCR kept crashing. That's what actually drove me from the WIn9x to WinNT, under 9x Adobe would crash and I'd have to reboot. Switching to NT at least the OS wouldn't crash, so I'd just have to restart Adobe. But it wouldn't OCR very well. That was in the 90's, every so often I'll search out and try some OCR package but still can't get a very good OCR. I'm thinking I might have to re-scan to get a better quality or raw file format but I don't have access to the fancy auto scanner I had back then.
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01-01-2020, 12:04 AM
Post: #23
RE: Which manual for HP-48SX?
(12-31-2019 11:27 PM)EugeneNine Wrote:  It doesn't say if the error is in the two volume or combined dingle manual. I wonder if HP fixed some for the second version. I don't know who made the errata, if it was from HP or compiled by users like us or which manual set the page numbers correspond to, I didn't dig that deep yet.

The errors are in the two-volume manual. Proof: the page numbers are decimal numbers from 95 to 814. My copy of the two volume manual has pages numbered from 3 to 852. The one-volume manual has pages numbered by the chapter. There is no page 95 in this manual. Rather, the identified text is on page 4-17. Furthermore, The identified text closely matches what's in my book.

The errata was not from HP. One of the items is tagged:
Received: by ucbvax.Berkeley.EDU (5.63/1.41)
id AA18033; Sat, 16 Jun 90 21:46:25 -0700
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for handhelds@csl.sri.com (handhelds@csl.sri.com)
(contact usenet@ucbvax.Berkeley.EDU if you have questions)
Date: 17 Jun 90 02:21:17 GMT
From: jpser@cup.portal.com (John Paul Serafin)
Organization: The Portal System (TM)
Subject: More HP48 manual corrections
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(12-31-2019 11:27 PM)EugeneNine Wrote:  The PDF's on the museum, when I scanned them all I had access to was Adobe products and the OCR kept crashing. That's what actually drove me from the WIn9x to WinNT, under 9x Adobe would crash and I'd have to reboot. Switching to NT at least the OS wouldn't crash, so I'd just have to restart Adobe. But it wouldn't OCR very well. That was in the 90's, every so often I'll search out and try some OCR package but still can't get a very good OCR. I'm thinking I might have to re-scan to get a better quality or raw file format but I don't have access to the fancy auto scanner I had back then.

What I was suggesting was using a PDF editor. AFAIK, they are readily available, but not free.
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01-01-2020, 12:25 AM
Post: #24
RE: Which manual for HP-48SX?
OIC, edit the images in the PDF?

I want to OCR them to editable text and then be able to make corrections.
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01-03-2020, 02:24 PM
Post: #25
RE: Which manual for HP-48SX?
Well, I have it another run. https://github.com/tesseract-ocr/ seems to have done a decent job at OCR'ing. My thought was to put it all into a (Open/Libre) document and put that on githib where we can then apply any of the corrections and they will get tracked as to who/how/why.
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01-03-2020, 04:33 PM
Post: #26
RE: Which manual for HP-48SX?
(01-03-2020 02:24 PM)EugeneNine Wrote:  Well, I have it another run. https://github.com/tesseract-ocr/ seems to have done a decent job at OCR'ing. My thought was to put it all into a (Open/Libre) document and put that on githib where we can then apply any of the corrections and they will get tracked as to who/how/why.

Can GitHub show differences between commits to ODT files? Or will it just say something like "binary files differ"?

— Ian Abbott
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01-03-2020, 04:41 PM
Post: #27
RE: Which manual for HP-48SX?
hmm, not sure. I'll have to test.

Or maybe use LaTex or something
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01-03-2020, 06:33 PM
Post: #28
RE: Which manual for HP-48SX?
I OCR all manuals/documents that I scan with ocrmypdf (uses tesseract). It keeps the original image in the background, but adds invisible text so that the text search works in the document. Most text is recognized without errors, but symbols, graphics and special fonts are a problem. I highly doubt that a full conversion will work.
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01-03-2020, 07:57 PM
Post: #29
RE: Which manual for HP-48SX?
(01-03-2020 06:33 PM)SammysHP Wrote:  I OCR all manuals/documents that I scan with ocrmypdf (uses tesseract).

"Uses Tesseract OCR engine to recognize more than 100 languages"

So the same back end, I used the gimagereader front end.
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01-09-2020, 09:47 PM
Post: #30
RE: Which manual for HP-48SX?
I have the three 28S manuals as well as the new 48G manual.
Always felt the 28S were written in that old HP style where much care was taken... the 48G manual on the other hand the complete opposite in quality both materially (thick vs thin paper, spiral vs non-spiral) and content.

Six years likely separated this transition with the 48S/SX being in the middle. The move from spiral to cheap in the 48S manual sets may well have been costs.

Will never forget the SX had a model plaque whereas the S was printed (as were all later models).

SX feels weighty G feels lightweight, granted this could just be new technology ))

28S keyboard the last decent HP keyboard as well.

But around 1991/92 things changed.

HP-28S (1988 US model)
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01-09-2020, 10:42 PM
Post: #31
RE: Which manual for HP-48SX?
It's pretty easy to build a searchable PDF from scanned images with open-source tools. From the Linux command line, assuming your images are PNGs and named in order of the pages:

Code:
for f in *.png;
do
   tesseract "$f" ${f%.png} pdf
done

pdfunite *.pdf output.pdf

If you don't have pdfunite or tesseract, you can install them with the following commands (assuming your distro uses apt):

Code:
sudo apt install poppler-utils
sudo apt install tesseract-ocr

I did all this with Windows 10's built-in Linux services, using Ubuntu 16.04.
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01-10-2020, 01:12 PM (This post was last modified: 01-10-2020 01:16 PM by EugeneNine.)
Post: #32
RE: Which manual for HP-48SX?
I had a .pdf soruce (The HP digital sender I used creates pdf's in its firmware), the gui front end just extracts each page, OCR's then puts back together for me. That part was easy but still had a number of errors due to things like a not clean scan and lots of math symbols. So I'm slowly going though and cleaning it up.
I would just upload here but its exceeds the file size limit.
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