Hm, but why? :D
'64D7274' is a typo (now discovered after close to 25 years later), with a 'D' instead of a '0'; This error has replicated into the component list of the 16F1144 16/4 microchannel adapter (but not the initial "Long" 4Mbps Token-Ring adapter that also
uses it). Peter's statement that the microchannel Token-Ring adapter(s) using the 6407274 "CHEX" chip are later revisions is incorrect; To wit, it is on the first 8-bit 4Mbps Token-Ring adapters, the first microchannel 4Mbps Token-Ring adapter, the first
8-bit 16/4 Token-Ring adapter, and likely the first 16/4 microchannel Token-Ring adapter (this discussion). The alternative that was on later Token-Ring adapters was a pair of 53F2158 (Louis posted a separate follow-up to this post in 2019, which I also
revived).
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