Christian wrote.... ------- In total, there are three different keys used on the 21MX, 1000M and 1000E/F. -------
Ug... no. There are not 3 different keys used. And for the record, the 1000M and 1000E/F are *ALL* 21MX's, at least in the end. They are also all "1000's" in the end as well :> But 21MX & 1000M/E/F is redundant. There are two different keys for the 21MX (later called the 1000) line. One key is for the systems where the front panel was a keyswitch. This is the one that is doublesided. The other key is for systems where the front panel was just a latch for the door of the cpu chassis. This is the one that is single sided, with two notches. The 2105, 2108, and 2112 (M series) could be had with either an A or B rev power supply. I believe the power supply (A vs B) dictates which key is used (or more precisely, whether it is just a latch or a switch). I don't believe the 2109, 2113 (E series) or 2111, 2117 (F series) ever came with an A rev power supply, just B. But even if they did, it was probably for a very short time, as the A rev power supply was a nightmarish abortion that was quickly tossed for the B redesign. Perhaps the A was only around for the 2105/2108/2109, and was tossed by the time the later models came out. In any case, just two keys. That third picture that Christian supplied is either the same key but just a different blank, or someone swapped some locks around (as the E/F he pictures it on is definitely just a latch). Bonus points if anyone knows where the "MX" came from in the 21MX moniker. Hint... MeasureX. There was actually a 3rd key in a similar architecture HP machine, the 2100A/S systems. Those machines used the ace key that we're all familiar with already, but they are most definitely not 21MX boxes. J
