TD8E Simple DECtape Controller
- M868H is an Eagle version of DEC's M868 (ECO Rev. K) Simple Dectape Controller.
- M868Hcjl is a version of M868Hl with an SDLD bug fix described by Charles Lasner.
- M868Hvrs1 is a version of M868Hl with an SDLD bug with easier mods.
- M868Hvrs2 is another version of M868Hl with an SDLD bug fix (cleaner design).