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From actual monitor code, sequence used to read drum:
EOD* 10000B Alert Interlace
GDAC3: EOD 14202 I/O control mode EOD (mode 1)
A=0 High order memory address bits
Hicount=2 (Word count=04000=2KW)
POT GDBCL+2 Low-order memory address bits.
RRF (EOD 2226) Read RAD file (mode 0)
Problem is that RRF is clearing the interlace information saved by the previous POT and sets up for a new POT. That is, in sds_io.c, mod 0 of op_eomd always assumes that a POT will follow if the channel is C or greater. Have to add tests of chan_flag. If interlace is active, do not capture new information from this EOM/EOD.
Also removed superfluous trailing blanks from lines in file.