The thread behind the link I gave earlier (yesterday) does indeed exactly describe my problem and my 'scope's behavior.
There's a valid copy of a TDS 3014B NVRAM available as well. That means, I'm now looking for a way to "program" my DS1742W. That device, which basically looks like (and is) an SRAM, isn't directly supported by my programmer, a TL866II plus. A poster on the thread mentioned that he used his TL866II and I have contacted his blog but got no answer yet (it's only been a short while).
I have no problem finding a supported regular SRAM but the 3.3 V Vcc spec for the DS1742 -W version could be a problem.
Would it be safe to treat the DS1742W (3.3 V) as a DS1742 (5 V) for the copying operation? According to the data sheet, Vcc max is 6 V (not mentioned separately for either version) and Vin max is specified as Vcc + 0.6 V.
I'm pretty sure I can find a regular(almost) pin-compatible 2 kbyte SRAM from the supported list and connect that to the TL866II plus, if necessary with a few wires for pin compatibility.
Raymond
Raymond Domp Frank