GNT-4601 punch cable help

[Simon Claessen]

Hey Mike.

I took apart the cable we use and this is the setup:

db25         de9
----------------------
1  ------   shield
2   ------   2
3   ------   3
7   ------   5
4,5          1,4,6
6,8,20

simon

On 23-02-15 04:06, Mike Loewen wrote:
>     Well, I finally got back to the GNT 4601, and I'm still unable to
> get it to work correctly.  I'm using the following (null) cable,
> connected to the DCE connector (the one on the corner):
>
> DE9        DB25
> --------------------
> 1        20
> 2        2
> 3        3
> 4        6,8
> 5        7
> 6        20
> 7        5
> 8        4
>
>     On the GNT 4601, FDX, DC Codes Off.
>
>     On the Linux side:
>
> stty -F /dev/ttyS0 -a
>
> speed 1200 baud; rows 0; columns 0; line = 0;
> intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
> eol2 = <undef>; swtch = <undef>; start = ^Q;
> stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O;
> min = 1; time = 0;
> -parenb -parodd cs8 -hupcl -cstopb cread clocal crtscts
> -ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl -ixon
> -ixoff -iuclc -ixany imaxbel -iutf8
> opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0
> vt0 ff0
> isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop
> -echoprt echoctl echoke
>
>     With these settings, nothing happens when I send chars to the punch
> (cat > /dev/ttyS0).  If I turn RTS/CTS off (-crtscts), the punch runs
> and chars are punched, although I'm certain not all of them.
>
>     If I try and read a tape from the punch (cat /dev/ttyS0, press the
> Read button on the punch), I get nothing on the Linux side.  The tape
> reads a short burst every time I press Read, but nothing ever shows up
> on the terminal.
>
>     I'm beginning to the the 4601 has a problem, at least with the
> reader. I've tried to duplicate a tape in Local mode, and nothing seems
> to be read and nothing gets punched.
>
>     Feeling very frustrated.
>
> On Fri, 6 Feb 2015, Simon Claessen wrote:
>
>> well I located the machine and it turns out that the connector closest
>> to the corner is used. we made a nullmodem cable going to a db9
>> connector and we grab the papertapes on a 600/1200 baud setting as
>> handshaking is somewhat broken on the pc side and we want to be shure
>> to get al the bits. :-)
>>
>> Our capture of pdp-8 tapes is here:
>> https://github.com/Hack42/Museum/tree/master/Papertape
>>
>> On 02-02-15 16:05, Simon Claessen wrote:
>>>  we have a 4601 and i've made a nullmodem cable, but at the moment, I
>>>  cant to remember on which connector it went. i think is was the
>>>  connector going to the terminal, not the computer one. via the dip
>>>  switches on the bottom you can preset three speed settings,
>>> available at
>>>  a switch on the top. I will take a look wednesday when i'm back at the
>>>  museum.
>>>
>>>  simon
>>>
>>>  On 02-02-15 05:43, Mike Loewen wrote:
>>> >      I have a box of old HP paper tapes to read, and am having an
>>> awful
>>> >  time trying to build the right serial cable to connect a GNT-4601
>>> >  reader/punch to a Linux PC.  Does anyone have a known good cable
>>> diagram
>>> >  and stty settings that will work?  Thank.
>>> > > >  Mike Loewen                mloewen at cpumagic.scol.pa.us
>>> >  Old Technology                http://q7.neurotica.com/Oldtech/
>>> >
>>
>> --
>> Met vriendelijke Groet,
>>
>> Simon Claessen
>> drukknop.nl
>>
>>
>
> Mike Loewen                mloewen at cpumagic.scol.pa.us
> Old Technology                http://q7.neurotica.com/Oldtech/
>

-- 
Met vriendelijke Groet,

Simon Claessen
drukknop.nl