| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 726.1 | Partial success w/ an LA50 | MARKB::BRAMHALL | Mark Bramhall, CDA architecture, E PLURIBUS UNUM | Mon Jan 08 1990 13:54 | 6 |
| I use my LA50 with 1st Word -- but only after wiring a special cable
for it. And, I can get it to work with either 1st Word or with the
desktop -- but not with both. I wired the cable for the RQS/CTS flow
control (and set the jumper inside the LA50). That works with 1st
Word, but the desktop liked the XON/XOFF type of flow control much
better. I cannot make it work both ways...
|
| 726.2 | It works but ... | BAHTAT::BEECH | Graham Beech, SWAS Leeds UK | Tue Jan 09 1990 06:53 | 9 |
|
1stwordplus will work with an LA100 if you get the cable right. Since
both interfaces are DTEs you need a cross over on 2 and 3. It would
seem that 1stword cannot be made to use XON/XOFF flow control so you
must set the LA100 in restraint mode and wire the busy signal (forget
which pin) to CTS on the atari interface. You also need to edit the
'Ascii' driver supplied to send the correct escape sequences, then
load it and set it to use the serial port.
|
| 726.3 | Yahoo!!! it prints. | UKCSSE::RDAVIES | Live long and prosper | Wed Jan 10 1990 07:37 | 36 |
| Many thanks to all who helped. It was a combination of everything
previous. I had to switch the desktop to RTS/CTS from XON/XOFF, switch
the printer for modem control.
Still wouldn't work, but by now I was armed with the datacomms
handbook. The cable was a BC22D, it had the following connectinos:
1-1
2-3
3-2
7-7
6-20
20-6
No RTS/CTS,
so I linked 4-5 in both plugs. Hey presto it sprang to life. One
question outstanding: I looped the signals round in each plug, should
they go end to end. i.e.
IS SHOULD IT BE?
1---------------------1 1---------------------1
2----------\ /-------2 2----------\ /-------2
\/ \/
3-----------/\--------3 3-----------/\--------3
4--+ +--4 4----------\ /-------4
| | \/
5--+ +--5 5-----------/\--------5
6----------\ /-------6 6----------\ /-------6
\/ \/
20----------/\--------20 20----------/\--------20
7---------------------7 7---------------------7
Reason I ask is I get the printer bleeping, not sure yet if it's an
illegal function, or if it's data overrun.
Richard
|
| 726.4 | | GRAPHX::WEAVER | VISUAL::WEAVER Image Systems Group | Wed Jan 10 1990 17:21 | 8 |
| What you did will work, what you propose would be the configuration for
a printer that would handle RTS/CTS flow control.
You are probably getting beeps due to lost data, is XON/XOFF flow control
enabled? You might need to reduce the baud rate if it is, otherwise, simply
enabling XON/XOFF should do the trick.
Enjoy, -Dave
|
| 726.5 | Beeps are data overrun | BAHTAT::BEECH | Graham Beech, SWAS Leeds UK | Thu Jan 11 1990 07:08 | 16 |
|
You are getting data overrun because you now have CTS set permanently.
Unfortunately the LA100 doesn't toggle it's RTS signal for flow
control, it uses a busy signal (restraint mode). I can look up the
pin numbert if you don't have a manual, but it's one that normally
isn't used in an RS232 interface.
So you must have the LA100 in restraint mode not XON/XOFF and you must
have the right pin connections to get flow control.
There is another option - you could turn the speed down to about 300
bps !
-Graham.
|
| 726.6 | Maybe I should take an LA100 course :-) | UKCSSE::RDAVIES | Live long and prosper | Thu Jan 11 1990 08:24 | 12 |
| This ought to be re-titled "how does RS232 work" :-)
I have the manual, but it says BUSY (pin 11) is ON to signal the
computer to STOP sending data. However, RTS says ON to RECEIVE data.
However, there is pin 19 (Secondary RTS) which claims to do what 11
does, but also claims to be an RTS equivalent. So I'm still unclear,
but plan to try each of the signals in turn until I get it right!.
Thanks for all the replies, keep any more help coming.
Richard
|
| 726.7 | It works ok for me | STKAI1::SODERLUND | | Fri Jan 12 1990 03:41 | 31 |
| I've got a LA50 and it works O.K. if you connect it like this.....
(I think it's the same for LA100).
Cross pin 2 and 3 like a null modem cable and use pin 7 for signal
ground, connect pin 5 from Atari side to pin 11 on the printer side
that will do the trick.
Pin 11 is the Bussy/Ready signal, and Atari use "bussy=low" set by
dip switches inside the printer.
In LA50 it's SW1-6 and SW1-7 in the closed position.
You can also use an ordinary nullmodem cable and put a jumper between
pin 5 and 11 (pin 11 is not used in Atari and pin 5 is not used
in the printer)it works O.K. I've tried it.
Atari printer or Atari printer
2-----------------3 2----------------3
3-----------------2 3----------------2
7-----------------7 7----------------7
5-----------------11 5----------------5---]
] <-- Jumper
11----------------11--]
No other pin's are used.
That's all have fun
Hans.
|
| 726.8 | The final conflict! :-) | UKCSSE::RDAVIES | Live long and prosper | Mon Jan 15 1990 08:38 | 20 |
| It now works perfectly!. set to 9600 with full data control. I took the
circuit as in .7 (thanks Hans) but the LA100 needed DSR when in modem
control. so I looped back DTR to DSR. I also looped RTS/CTS on the
printer for good measure.
Atari printer
2-----------------3
3-----------------2
7-----------------7
5-----------------11
+--4
|
+--5
+--6
|
+--20
Richard
|