Same thing in this case. The 11/84 is an 11/83 extended by a Unibus interface to support legacy peripherals. -----Original Message----- From: W2HX [mailto:w2hx at w2hx.com] Sent: Sunday, July 01, 2018 7:36 AM To: Paul Birkel; General Discussion: On-Topic and Off-Topic Posts Subject: Re: DEC FPJ11-AA what is the story about this board? Listing says 11/84 but this website says 8190-AE is for 11/83? http://web.frainresearch.org:8080/projects/pdp-11/dcj11.php Which is it? Thanks Eugene W2HX ________________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Paul Birkel via cctalk <cctalk at classiccmp.org> Sent: Sunday, July 1, 2018 4:00 AM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: DEC FPJ11-AA https://www.ebay.com/itm/DEC-PDP-11-84-M8190-AE-Module-FPJ11-AA/113112634277 IMO a really good deal on an 18 Mhz FPJ11-AA. Those don't seem to come up much . Not my item, but I have previously purchased from this seller and he's reliable. ----- =