Preventing CGA revisionist history

Oh for %deity's sake.... I will admit that the Techref I looked is a relatively late one in that I bought it from IBM long after it was discontinued (they still had some in stock). But I've never seen or heard of another version of the CGA monitor Chuck has posted the same information from his techref. I feel it's unlikely IBM would have changed this (why do so?). And rememebr the idea was perpetuated in the EGA card/monitor (why do this if the earlier CGA card had not also done it?). And also I've seen clone CGA monitors that had a circuit to perform the same function (often a 74138 decoder chip was used to detect clour 6). And we all know that some clones missed out anything that was not strictly necessary I feel the onus is on the original questioner to provide documentary evidence, including schematics, showing an IBM CGA monitor that did not do this. Or an example of an actual IBM-badged 5153 that does not contain this circuitry. Should one be found I'll be happy to put a note in my Techref. But until one is found I am happy to beleive that all 5153s include the brown-kludge. -tony