I had to retrive a Rs232 diagram for a PC mouse drivers.

[XavSnap]

I had to retrive a Rs232 diagram for a PC mouse drivers:

Hi,
I plan to build a Pc mouse card for Zx81.
http://zx81.ordi5.free.fr/brico

But, all features are based on the Z80 SIO+Max232+clock...
Is where any simple diagrams, juste to use a Pc mouse!

I remember the light-pen feature, how used the sound in socket.

Have you anything like that?
... a Rs232 card, light-pen card ...

[BrunoFlorindo]

I have an interface from Zebra Systems that was designed to work with a Koala Pad or a joystick, but the software doesn't exist anymore. I posted pictures of this interface a few months ago right here in this forum, before I knew what it was for. I'm not sure if it could be used for a PC Mouse.

Now, wouldn't it be easier to examine one of the many existing PS/2 interfaces for the Spectrum and adapt it for the ZX81?

Here's one of them (instructions in Spanish, but all necessary files are there):

http://www.speccy.org/trastero/cosas/dr ... mar3_s.htm

[XavSnap]

Hi Bruno,

Nice web page !

But, this feature is heavy...
I will have a look to your diagram.