Yes, this was also suggested by Bob Ammerman and it sounds just like the way
to go for my purpose: 4 sensors connected to 4 PICs so parameters can be
adjusted aut. by the PC. Actual output from the sensors wont go through
RS232 since they must be read in sync and responstime is an issue.

I have also looked into RS485 as Byron refered to in his reply. I am not sure
how that works, but I found some RS485 tranciver ICs. Speed is 250kbps
to 4mbps.

Does 485 use some special protocol, or can I just the TX/RX from the PIC
to the 485 tranciver ?
PIC1 <-> RS485 tranciver <==== 485 BUS ====> <- RS485 tranciver <-> PIC2

/PJ

From: "Harold M Hallikainen
>         You can also do a cheap short distance serial bus using TTL levels
right
> out of the PIC. In a dental product, I have a couple PICs in the desktop
[snip]

> > Hi, I am investigating the possibillity to have 4 PIC 16F877
> > connected to the same PC on a RS232 'bus'.
[snip]

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