But I agree that given the 18 chips, [the MSV11-R is]
probably parity.
The link below is a screenshot from the onboard KDJ11-B 'print a memory map'
function. It confirms the DEC MSV11-R is recognized as parity.
http://www.vcfed.org/forum/attachment.php?attachmentid=37954&d=14930181…
Aaron