SAVE18.COM is the version of SAVE.COM that has
DRI patch 18 installed to lengthen the command
buffer to allow a full 8x3 file name.

SAVE18.ASM is the source file to produce SAVE.RSX
and has had the patch provisionally installed.
Just set PATCH18 to TRUE prior to compile. If set
to FALSE then it will compile as DRI released it.