sed -- which? (HHsed, SedMod, CheapSed, MiniSed, GNUsed)
       -- test various versions, too (e.g. GNU 3.02.80, 4.1.5, 4.2.2, 4.4)
          -- (presumably old DJGPP ports, mostly)

sed \< \> -- yes or no? (non-standard, so no longer required by most)

sedcheck.sed vs. gsed (4+) "--posix"
  -- beware "\+" (which *BSD and older dislike)

tidy.sed? (not OCT or WOLF) ... good for small RAM disk, faster translation

freely available assembler? (shareware, freeware, OSI, Free/libre)
  = can the assembler build itself? (bootstrapping)

8086 host tools? (since only 8086 + VGA target code anyways)

need linker? (only OW's WASM and LZASM)

cross-assemble from other OS? (Windows or Linux or ... ?)

N.B. Keep most .BATs' size under multiples of 512 bytes! Don't waste space!
