[GreenKeys] Troubleshooting papertape reader

[Mike Douglas via GreenKeys]

Bill,
You're going to want to start by isolating this problem to the reader or the printer mechanism. I'd read the tape into a file on your PC and see whether or not the LFs are being lost/garbled by the reader. If not, then you're really just chasing a printer mechanism issue with this particular symptom.
Use a terminal emulator like TeraTerm and capture the received data into a binary file. Do you still have a PC with a native serial port instead of a USB-serial adapter? Many serial adapters have problems at 110 baud.
Mike 



     On Thursday, April 23, 2015 10:44 AM, B Degnan via GreenKeys <greenkeys at mailman.qth.net> wrote:
   

 Hi all,
I have a question about reading a papertape.

Let's say I have two machines,  both in local mode.

I want to read in a papertape that has the following data on it:
S10400F3FF09
S11300000D7600F37E18F97E033C00004838002C7E
S113001000000000000000000000000000000000DC
S113002000000000000000000000000000000000CC
S113003000000000000000000000000000000000BC
S113004000000000000000000000000000000000AC
S1130050000000000000000000000000000000009C
S1130060000000000000000000000000000000008C
S9


Machine #1 - run the tape in the reader I get
S10400F3FF09
S11300000D7600F37E18F97E033C00004838002C7E
S113001000000000000000000000000000000000DC
S113002000000000000000000000000000000000CC
S113003000000000000000000000000000000000BC
S113004000000000000000000000000000000000AC
S1130050000000000000000000000000000000009C
S1130060000000000000000000000000000000008C

Machine #2 - run the same tape in the reader and a number of the lines do not line feed, typing over the line.  
This happens in the very beginning and every so often but enough to make it impossible to load a long program from the reader.

I have checked the reader and the form out mechanism.  Nothing obvious appears wrong to me, the unit is clean and oiled but not too much.

I welcome your suggestions.  What could be wrong?

Best
Bill Degnan
vintagecomputer.net

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