Date   : Thu, 19 Jan 1984 08:11:00 EST
From   : Robert L. Plouffe <PLOUFF@mit-mc>
Subject: MDM717 ACKNAK BUG

I had recommended that the ACKNAK flag be set to 'NO' in MDM17
as released by Irv Hoff so that sectors are repeated only upon
receipt of a valid NAK or a timeout occurs.  This works automatically
in MDM716 since I had killed the ACKNAK flag.  However Hoff tried
to restore it in MDM717 and did it wrong. Setting ACKNAK to 'NO'
has no effect (gives same as 'YES'). For those who have source and
need a correction, the following three lines at GETACK are wrong:
       LDA     AGETACK
       ORA     A
       JZ      ACKLUP
Change to:
       LDA     ACKNAK
       ORA     A
       JZ      GETACK1

Better yet, wait for MDM720 (and go back to
MDM716 in the mean time).  Ron Fowler is working on beta test
version of 720 now and will have this as well as all the buffer
discussion problems fixed plus new featyres..