Date   : Tue, 16 Feb 1988 20:07:00 MST
From   : "Frank J. Wancho" <WANCHO@SIMTEL20.ARPA>
Subject: CP/M-86

John,

The number, in hex, after the colon, is the number of data bytes to
follow after the PC (two hex bytes, low hex byte first) and a 00h.
Thus, if the number after the colon is 10h (16d), the line length, in
characters, would be:

colon           1
count           2
address of PC   4
type (0 = bin)  2
data in hex    32
checksum        2
               --
               43

or, an overhead of 11 characters.  Thus, if the line is 71 characters
long, the two characters after the colon would be 1Eh.  If it were 65
characters long, the two characters would be 16h.

In any event, DDT and LOAD both know how to handle counts other than
10h.  All HEXIFY is trying to do is reduce the number of lines
requiring that 11 character overhead by packing more data per line,
all of which is perfectly legal in the Intel HEX format.

--Frank