I have a salvaged Epson 6110 tape punch on the bench, also it's interface card from a Data Dynamics Zip 30. The 6110 is the shiny paper tape punch which was very common, at front left, on TTY etc in the 70's and into the 80's I'm working on reverse engineering the Epson 6110's connector / interface, it's a "centronics" 24 pin. Does anyone have or know of a spec for the Epson interface, or manuals for a system using it. The basics are plain enough 24V power, ground connections, 8b+s, all low side drivers (54SN463's), one output (to a 7414) I presume Ready_n, and another two inputs I guess Enable_n and Advance_n (or maybe Reverse). RevEng should get me there, documentation would ensure no possibility of magic smoke - excluding bad components. Bring up plan is: - apply 28 V and scope "connector" - button up to suitable processor; ie interpose LoSide drivers between processor's LVTTL and the punch VMTiA Martin