I have gotten interesting benchmark results from the PDP-11/23+. A man, who sent them, reports that his M8189 module has 5.0688 МHz crystal. IMHO this contradicts data from http://web.frainresearch.org:8080/projects/pdp-11/dcf11.php where 75 ns clock period (13.33 Mhz) is stated. Would anyone like to clarify this issue? Thank you.
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the PDP 11/23+ question
- Thread starter vol.litwr
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cbscpe
Experienced Member
Most likely he has also a 13.84MHz, 24MHz or another crystal. The 5.0688MHz crystal is for the baud-rate generator of the on-board SLUs 
Last edited:
fjkraan
Experienced Member
My M8189 board has both a 5.0668MHz and a 26.666MHz crystal oscillators.
reinhardtjh
Experienced Member
Mine is the same.