Parallel Interface Performance Analyzer
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09
This performance analyzer for a controller or a printer having a Centronics interface can automatically measure and display a host controller waiting time, a printer waiting time and a total time for transmitting data between the host and the printer by manually setting a transmitting data length therein. As shown in Fig. 1, this analyzer comprises a Parallel Interface Performance Analyzer (PPA) card and a utility program installed in a IBM 5550 system. The analyzer is connected between the host controller and the printer to be analyzed. The PPA card has three Programmable Interval Timers (PITs). One of the PITs counts strobe (STB) signal pulses on a parallel interface until its content equals a byte number manually set by the 5550 keyboard.