ICD P: R: connection..

[Atari-Collector]

I got my P: R: connection in the mail today... It didn't occur to my the serial connectors on the unit would be male DP9 instead on female DB9 like on a PC. So now I have to scramble to get it going. Are the pin outs the same as a normal RS232 or something else?

 

I figure I can either try building my own cable if I have all the parts handy, or other something premade on Amazon.ca or something.. on ebay if I want to wait 3 months to see if anything shows up..

 

help

[Fox-1 / mnx]

The pinouts are not the same as PC. They are the same as on an Atari 850

 

http://atari.fox-1.nl/atari-400-800-xl-xe/400-800-xl-xe-tools/null-modem-cable-wiring/ (this is for null-modem)

[BillC]

Atari couldn't use thr PC standard 9-pin serial port since it didn't exist at the time, the 850 was released several years before IBM introduced it on the AT computer.

Edited May 12, 2018 by BillC

[Bikerbob]

So if I am going to use a PR: connection to a UDS-100 then I need to wire it up as a null modem cable as per the link Fox-1 put up?

 

James

[tschak909]

or buy a CX88 terminal cable from B&C.

 

-Thom

[Fox-1 / mnx]

So if I am going to use a PR: connection to a UDS-100 then I need to wire it up as a null modem cable as per the link Fox-1 put up?

 

Depends on what the UDS requires but usually devices must be wired with a straight cable (null devices = null modem). In case of a PC this would be simple pin #1 to pin #1, etc... but with an P:R: you need to wire so that the signal names match. DTR to DTR, etc...

 

PIn #9 (on both PC and P:R:) is RI which is not used with a null modem but will probably with a real modem.

 

Or look above for the CX88 :-)

[Bikerbob]

Oh I have the parts, and I need to go from a 9pin on the PR: Connection to 25pin on the UDS.. so I guess I will wire one up.. and I will do the full cable for the HW handshake.. thanks for the diagrams. I was just going to use one of my serial cables.. because the SIO2PC uses a standard PC cable.. I guess I got it in my head thats all I needed.

 

James

Edited May 12, 2018 by Bikerbob

[+DrVenkman]

or buy a CX88 terminal cable from B&C.

 

-Thom

This.

 

I bought a NOS CX-88 still in the package from Bruce early last year for use between my P:R: Connection and a Lantronix MSS100. Works great. I don’t remember but I think you need a straight-through gender changer somewhere along the lines too, maybe at the Lantronix DB25 side (traveling this weekend so I can’t check).

[Fox-1 / mnx]

Oh I have the parts, and I need to go from a 9pin on the PR: Connection to 25pin on the UDS.

I usually don't make null-modem cables but a custom gender-change-like / breakout-box thing in stead. Depending on what you already have laying around, cable-wise, this may be more useful.

[Bikerbob]

I usually don't make null-modem cables but a custom gender-change-like / breakout-box thing in stead. Depending on what you already have laying around, cable-wise, this may be more useful.

 

I am not sure what that is? Dont know how that would be easier than just wiring up a cable? can you explain?

 

James

[Fox-1 / mnx]

 

I am not sure what that is? Dont know how that would be easier than just wiring up a cable? can you explain?

 

 

If you never use a null-modem cable it's of no use, but if you do... It's just a small box with a 9-pin male at one end and a 9-pin female at the other. The rewiring/cross-wiring will be done inside that box. That way you can always use a regular 850 cable. If you need to connect a modem, don't plug in the box. If you need a null-modem connection, plug in the box.