The Sinclair QL Forum

I'm making an adapter to connect a PC serial mouse to the QL, but the Internet is not so full of information about.
The SER2 port supplies 12V (on pin 6). Should I connect also these 12V to the DB9 mouse plug in order to supply power to the mouse or not?
If yes, where exactly?

Thankds in advance

I solved.
A) The 12V must not be connected.
B) The pin 4 from SER2 (DTR out) must not be connected to the corresponding DTR pin on DB9 plug, but to the pin 7.

Now my adaptor works I made a wiring scheme: please feel free to utilize it if you need:

Nice, thanks for sharing solution!

XorA wrote:Nice, thanks for sharing solution!

My pleasure

Cristian wrote:I solved.
A) The 12V must not be connected.
B) The pin 4 from SER2 (DTR out) must not be connected to the corresponding DTR pin on DB9 plug, but to the pin 7.

Now my adaptor works I made a wiring scheme: please feel free to utilize it if you need.
Here below the link:

https://dl.dropboxusercontent.com/u/397 ... daptor.jpg

Wow!!!

Great Job Cristian!!!

Thanks!

Cristian wrote:I'm making an adapter to connect a PC serial mouse to the QL, but the Internet is not so full of information about.
The SER2 port supplies 12V (on pin 6). Should I connect also these 12V to the DB9 mouse plug in order to supply power to the mouse or not?
If yes, where exactly?

Thankds in advance

Hi Cristian,

Rather late, but I found your post re Mice. I was in the same situation as you a while ago.
Here are my findings about serial Mice, actually my `Genius Mouse' needs to be powered from +12V.
http://theqlforum.com/viewtopic.php?f=2& ... =DIY+Mouse

Further interesting read on serial line, rather didactic here,
http://www.tldp.org/HOWTO/Serial-HOWTO-19.html#ss19.3

EDIT, plus this, @Dilwyn's site,
http://www.dilwyn.me.uk/docs/hardware/serials.zip

Hope this helps.
Tomas

tcat wrote: Hope this helps.

Tomas,
even if I solved and my mouse doesn't need the 12V imput, thank you very much for your important information. Your topic and findings are very interesting and I'm going to study them.
I hope you found my Sermouse connection scheme (previously linked). It's a very little thing, but it might be useful somehow.

Cristian in viewing your Sermouse adapter I remembered I bought a Mersey Mouse kit and just by luck I found the documentation still tucked inside my QL Users Guide. See attached.

Qbits

Hi Cristian,

Whenever I see your drawings, I am jealous of your art skills, my drawings are more like this. What tools do you you use to make them? Tomas