DIGITAL RESEARCH(r) CP/M Plus TM (CP/M Version 3) Operating ...

6.3 ED Operation CP/M 3 User's Guide
Initially, the line number display is on. Use -V to turn it off. If the memory buffer
is empty, or if the current line is at the end of the memory buffer, ED represents the
line number as five blanks. The OV command prints the memory buffer statistics in
the form:
free/total
where free is the number of free bytes in the memory buffer, and total is the size of
the memory buffer. For example, if you have a total of 48,253 bytes in the memory
buffer and 46,652 of them are free, the OV command displays this information as
follows
46652/48253
If the buffer is full, the first field, which indicates free space, is blank.
The A (Append) Command
The A command appends, copies, lines from an existing source file into the memory
buffer. The A command takes the following form:
nA
where n is the number of unprocessed source lines to append into the memory buffer.
If a pound sign, #, is given in place of n, then the integer 65,535 is assumed. Because
the memory buffer can contain most reasonably sized source files, it is often possible
to issue the command #A at the beginning of the edit to read the entire source file
into memory.
When n is 0, ED appends the unprocessed source lines into the memory buffer untill
the buffer is approximately half full. If you do not specify n, ED appends one
line from the source file into the memory buffer.
6.3.2 ED Exit
You can use the W (Write) command and the E (Exit) command to save your
editing changes. The W command writes lines from the memory buffer to the new
file without ending the ED session. An E command saves the contents of the buffer
and any unprocessed material from the source file and exits ED.
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