View source for 7432

The '''7432''' (variants 74LS32, 74HC32) is a 74-series logic IC with four independent 2-input OR gates.
== 7432 Pinout ==
{{Pinout74xxQuad14pin}}

== Signal descriptions ==
For each set of pins starting with the same number, Y is high if either A or B are high.

== Fixed Bank Implementation ==

 7432 -- Connection
 ------------------
 +5V  -- +5V
 01   -- CPU A14
 02   -- 74161 Q0
 03   -- PRG A14 = CPU A14 OR 74161 Q0
 04   -- CPU A14
 05   -- 74161 Q1
 06   -- PRG A15 = CPU A14 OR 74161 Q1
 09   -- CPU A14
 10   -- 74161 Q2
 08   -- PRG A16 = CPU A14 OR 74161 Q2
 12   -- CPU A14
 13   -- 74161 Q3
 11   -- PRG A17 = CPU A14 OR 74161 Q3
 Gnd  -- GND

For a discrete logic mapper, this can be used to provide a fixed bank at $C000-FFFF by overriding a [[74161]] latch output with '''CPU A14''' (e.g. [[UxROM]]).

[[Category:7400 series|032]]