The clock frequency was originally limited to 5 MHz (IBM PC used 4.77 MHz, 3/4 the standard NTSC
color burst frequency), but the last versions in
HMOS were specified for 10 MHz. HMOS-III and
CMOS versions were manufactured for a long time (at least a while into the 1990s) for
embedded systems, although its successor, the
80186/
80188, has been more popular for embedded use.
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