DELTA TAU: PMAC VME 20 MHZ DSP56002 CPU 128K X 24 1 WAIT-STATE BATTERY-BACKED SRAM 128K X 8 PROM MEMORY FOR FIRMWARE STORAGE 2K X 8 EEPROM MEMORY FOR SETUP VARIABLE BACKUP RS-422 SERIAL INTERFACE; VME BUS INTERFACE 4 CHANNELS AXIS INTERFACE CIRCUITRY; EACH INCLUDING: 16-BIT +/-10V ANALOG OUTPUT 3-CHANNEL (A; B; C) DIFFERENTIAL/SINGLE-ENDED ENCODER INPUT 4 INPUT FLAGS; 2 OUTPUT FLAGS INTERFACE TO EXTERNAL 16-BIT SERIAL ADC DISPLAY; CONTROL PANEL; MUXED I/O; DIRECT I/O INTERFACE PORTS BUFFERED EXPANSION PORT