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In article <3B6996D1@MailAndNews.com>, Jan Vanden Bossche 
<jan80@MailAndNews.com> writes
>I just found a Dragon/32. Nice machine, good keyboard.
>
>I noticed that there was a parallel port, but not a standard connector on
>the
>computer side. Can I make my own cable to connect to a standard centronics
>printer ? Is it a straight ribbon cable ? Wich side is up, where is pin 1 ?
>
yes, there is a rather manky scan half way down this page:

http://www.onasticksoftware.co.uk/pcs_parallel.htm

key things are the data lines, ground, strobe and busy straight to the 
printer. ack isn't used by the dragon.

>Are the joysticks compatible with those of the Tandy Coco ?
>
yes.

-- 
== jon bird - software engineer
== <reply to address _may_ be invalid, real mail below>
== <reduce rsi, stop using the shift key>
== posted as: news@onastick.clara.co.uk
== email: jon@onasticksoftware.co.uk
== web: www.onasticksoftware.co.uk

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Jan,

Joysticks are compatible.  If you can find them, the Dragon joysticks were of
a better quality than the Coco's.  You can make your own printer cable.
According to the Dragon manual, looking toward the connector, pins are
numbered from the upper right starting with 1 through 19 in odd numbers, lower
row numbered from the lower right starting with 2 through 20 in even numbers.

Pin-out as follows:

DRAGON                CENTRONICS   DRAGON                 CENTRONICS
1 - Print Strobe      1            2 - +5 Volts           19
3 - Data bit 0        2            4 - +5 Volts           20
5 - Data bit 1        3            6 -  0 Volts           21
7 - Data bit 2        4            8 -  0 Volts           22
9 - Data bit 3        5            10-  0 Volts           23
11- Data bit 4        6            12-  0 Volts           24
13- Data bit 5        7            14-  0 Volts           25
15- Data bit 6        8            16-  0 Volts           26
17- Data bit 7        9            18-  0 Volts           27
19- ACR               10           20- Busy               12

You can use an IDC type ribbon connector and 20 conductor ribbon cable.  The
ribbon will match a ribbon type Centronics connector except for pin 20, which
will have to skip one wire slot to hit Centronics pin 12.

If you have 64k RAM, (64 powers up like the 32), type EXEC <ENTER> will change
the cursor from black to blue and you get 48k of usable RAM.  Do this
immediately after BOOTUP.  If you have already used the EXEC command, it is
EXEC 48000 <ENTER>.  POKE &H3FF,1 redirects printer output to the serial
port.  POKE &H3FF,0 restores the parallel port.  Note, to use the parallel
port, your printer must be set to "automatic linefeed=on".

The computer will also be able to use a composite video monitor.  Looking at
the connector from the back of the computer, the center pin is ground,
left-most is video, right-most is audio, other two pins are unused.

Hope this helps - George

Jan Vanden Bossche wrote:

> I just found a Dragon/32. Nice machine, good keyboard.
>
> I noticed that there was a parallel port, but not a standard connector on
> the
> computer side. Can I make my own cable to connect to a standard centronics
> printer ? Is it a straight ribbon cable ? Wich side is up, where is pin 1 ?
>
> Are the joysticks compatible with those of the Tandy Coco ?
>
> Jan.
>
> Greetings from the TyRannoSaurus
> Jan-80
>
> Mail me direct at JAN80@no.spam.PI.BE (remove 'no.spam.')
> ------------------------------------------------------------
>  Get your FREE web-based e-mail and newsgroup access at:
>                http://MailAndNews.com
>
>  Create a new mailbox, or access your existing IMAP4 or
>  POP3 mailbox from anywhere with just a web browser.
> ------------------------------------------------------------

--
George Hostler



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<html>
<font face="Courier New,Courier">Jan,</font><font face="Courier New,Courier"></font>
<p><font face="Courier New,Courier">Joysticks are compatible.&nbsp; If
you can find them, the Dragon joysticks were of a better quality than the
Coco's.&nbsp; You can make your own printer cable.&nbsp; According to the
Dragon manual, looking toward the connector, pins are numbered from the
upper right starting with 1 through 19 in odd numbers, lower row numbered
from the lower right starting with 2 through 20 in even numbers.</font><font face="Courier New,Courier"></font>
<p><font face="Courier New,Courier">Pin-out as follows:</font><font face="Courier New,Courier"></font>
<p><font face="Courier New,Courier">DRAGON&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
CENTRONICS&nbsp;&nbsp; DRAGON&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
CENTRONICS</font>
<br><font face="Courier New,Courier">1 - Print Strobe&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2 -
+5 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 19</font>
<br><font face="Courier New,Courier">3 - Data bit 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4 -
+5 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 20</font>
<br><font face="Courier New,Courier">5 - Data bit 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6 -&nbsp;
0 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 21</font>
<br><font face="Courier New,Courier">7 - Data bit 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8 -&nbsp;
0 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 22</font>
<br><font face="Courier New,Courier">9 - Data bit 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10-&nbsp;
0 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 23</font>
<br><font face="Courier New,Courier">11- Data bit 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 12-&nbsp;
0 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 24</font>
<br><font face="Courier New,Courier">13- Data bit 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14-&nbsp;
0 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 25</font>
<br><font face="Courier New,Courier">15- Data bit 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16-&nbsp;
0 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 26</font>
<br><font face="Courier New,Courier">17- Data bit 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 18-&nbsp;
0 Volts&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 27</font>
<br><font face="Courier New,Courier">19- ACR&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 20- Busy&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
12</font><font face="Courier New,Courier"></font>
<p><font face="Courier New,Courier">You can use an IDC type ribbon connector
and 20 conductor ribbon cable.&nbsp; The ribbon will match a ribbon type
Centronics connector except for pin 20, which will have to skip one wire
slot to hit Centronics pin 12.</font><font face="Courier New,Courier"></font>
<p><font face="Courier New,Courier">If you have 64k RAM, (64 powers up
like the 32), type EXEC &lt;ENTER> will change the cursor from black to
blue and you get 48k of usable RAM.&nbsp; Do this immediately after BOOTUP.&nbsp;
If you have already used the EXEC command, it is EXEC 48000 &lt;ENTER>.&nbsp;
POKE &amp;H3FF,1 redirects printer output to the serial port.&nbsp; POKE
&amp;H3FF,0 restores the parallel port.&nbsp; Note, to use the parallel
port, your printer must be set to "automatic linefeed=on".</font><font face="Courier New,Courier"></font>
<p><font face="Courier New,Courier">The computer will also be able to use
a composite video monitor.&nbsp; Looking at the connector from the back
of the computer, the center pin is ground, left-most is video, right-most
is audio, other two pins are unused.</font><font face="Courier New,Courier"></font>
<p><font face="Courier New,Courier">Hope this helps - George</font>
<p>Jan Vanden Bossche wrote:
<blockquote TYPE=CITE>I just found a Dragon/32. Nice machine, good keyboard.
<p>I noticed that there was a parallel port, but not a standard connector
on
<br>the
<br>computer side. Can I make my own cable to connect to a standard centronics
<br>printer ? Is it a straight ribbon cable ? Wich side is up, where is
pin 1 ?
<p>Are the joysticks compatible with those of the Tandy Coco ?
<p>Jan.
<p>Greetings from the TyRannoSaurus
<br>Jan-80
<p>Mail me direct at JAN80@no.spam.PI.BE (remove 'no.spam.')
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<pre>--&nbsp;
George Hostler</pre>
&nbsp;</html>

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