Please note that the content of this book primarily consists of
articles available from Wikipedia or other free sources online. AMD
Lance Am7990 IEEE 802.3 Ethernet Media Access Controller controller
were introduced in 1985. Its architecture is the basis for AMD's
PCnet Family of highly integrated single-chip Ethernet controllers.
The one exception is the Am79C940 MAC. The Am7990 chip was
fabricated in NMOS technology and has no integrated Manchester
encoder/decoder nor does it have an integrated 10BASE-T
transceiver. A later refabricated chip called the C-LANCE Am79C90
is made with 0.8 micrometre CMOS technology. The original NMOS
version Am7990 and the CMOS Am79C90 version are differ in some
details which may have an impact on device driver compatibility.
The datasheet for the CMOS version writes that the CMOS and NMOS
versions are the same. But the "Table B-1. Comparison Summary of
the C-LANCE and LANCE Devices" in the datasheet shows they differ.
These differences are not likely to require modifications of any
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