8 Mar
2015
8 Mar
'15
1:38 p.m.
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:
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
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:
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
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:
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
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/
>