Binary input processing in a computer using a stack

DETAILED DESCRIPTION With reference now to the drawing, it may be seen that the various blocks depicted therein are interconnected by lines, both narrow and heavy.
The heavy lines indicate a plurality of electrical lead wires each of which may transmit binary electrical data.
Unless otherwise indicated, the heavy lines may be regarded as comprising 16 separate electrical lead wires or lines.
The narrow lines interconnecting the blocks in the drawing may be regarded as single electrical signal transmission lines.
In the drawing, there is shown a memory/address bus 10 that may be regarded as being connected to a central processing unit and its associated memories and master clock (not shown).
The central processing unit typically includes a real time information transmission system, circuitry for the calculation and processing of the real time information received on the memory/address bus from input circuitry, and circuitry for use in performing any required calculations with the assistance of program information in the memory and any data that may be stored or placed therein as well.
In addition to the binary input data obtained from the circuitry illustrated in the drawing, the digital computer may receive other input information used in performing calculations or control functions.
As a partial example of computer function in engine control, it may be assumed that the binary input data received by the central processing unit contains input information concerning current air/fuel ratio of a mixture being supplied to an internal combustion engine as well as the amount of air flow into the engine.
This information may be placed on the memory/address bus 10 and may be used by the computer central processing unit (not shown) in the calculation of the duration of the fuel injection pulses that are to be used in controlling intermittently operated electromagnetic fuel injectors that supply fuel to the engine.
The pulse width or duration represents the amount of open time for the injectors.
The central processing unit would produce an output pulse for example, a change of a binary signal from a logic zero level to a logic one level, at the time a fuel injection from an injector is to begin and would produce a change from the logic one level to a logic zero level when the fuel injection is to terminate and the injector be shut off