Exami materajal
PALASM was used to express boolean equations for the outputs pins in a text file
which was then converted to the 'fuse map' file for the programming system using a
vendor-supplied program; later the option of translation from schematics became
common, and later still, 'fuse maps' could be 'synthesized' from an HDL (hardware
description language,) such as Verilog.
After MMI succeeded with the 20-pin PAL parts, AMD introduced the 24-pin 22V10
PAL with additional features. After buying out MMI (1987?), AMD spun off a
consolidated operation as Vantis, and that business was acquired by Lattice
Semiconductor in 1999.
Programmable Logic Array (PLA) - This device has both programmable AND and
OR planes. The space-flight application that I am aware utilized the bipolar, fuse-
based, 82S100 in the central processing units of the Magellan and Galileo attitude
control computers. PLA structures may also appear as part of some CPLDs. The two
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