igor@iias.spb.su (Igor Agamirzian) (03/10/91)
I'll be grateful, if anybody can help me in such problem. I have an IBM PS2
model 50 with one serial port (COM1) on the motherboard and a special mouse
port with a 6-pin connector. On the other hand, my mouse (Logitech model No.
M8-2F-9F) is a standard serial one. It works fine, when it is connected through
the COM1 port. But... I use an external modem, and it it needs the same port.
So I have a lot of trouble changing the connection any time I need to work with
a program, which needs a mouse.
As I know, the PS2 mouse port is a simplified serial one, and I suppose that
the standard serial mouse *can* work through it (am I right, or not?). When
beeing in the USA last autumn I bought a special 6-pin to 9-pin connector, but
my mouse driver doesn't want to find the mouse, when it is connected through
it. I failed in attempts to find a special PS2 mouse driver here (my computer
hadn't it on the DOS diskette, I think that because it was sold without mouse).
On the other hand, I checked the connection of the lines in the 6-9 pin
connector and found it to be *very* strange:
6-pin male 9-pin male
for PS2 for mouse
1
2 <--- It is to be a Transmit Data
1 (from mouse) signal! And it
/--- 3 <-\ is not connected at all!
2 ---\ | |
\----+---------- 4 +- And Recieve Data is connected
3 | | | with Signal Ground!
| +--- 5 <-/
4 -------\ | |
| \--------- 6 Though the Protective Ground
5 ----------------/ is not connected at all too...
| 7
6 ---\ |
\--------------- 8
|
\------------ 9
There is a good way - to buy a special PS2 mouse with the software. But...
I live and work in Russia, and it is really *impossible* to buy here what you
need. On the other hand, a PS2 mouse is more expansive than a standard serial
one. I think that it will be enough for me to have the pin assignement of the
PS2 mouse port and the port addresses in the i/o address space to make my
mouse work through it. But I failed in attempts to find the technical documents
on PS2 - it is a very rare computer here.
Thank you in advance,
--
-- Igor Agamirzian
Office: +7(812)350-2523 Home: +7(812)314-6055 Fax: +7(812)217-5105
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