3291 DynamicSignals Dataway Display CAMAC Module

The Model 3291 is a single-width module that indicates the state of all Dataway signal lines during a Dataway cycle. It contains two 24-bit registers, designated as Data and Command register, the outputs of which are continuously displayed by front-panel LEDs.

The Data register is loaded from the Dataway Write lines for a Write operation and from the Dataway Read lines for a Read operation. The Data register can be read by N F(0)•A(0). The Command register is loaded during Dataway operations and contains five F bits, bits representing N, X, Q, C, Z, I, L, P2, and P1. The bit position in the Command register is as indicated by the associated LEDs on the front panel. The Command register can be read by N F(0)•A(1).

Several modes of operation which are provided determine the manner in which the registers are loaded. They are S1, N S1, Q S1, DC WRITE, and DC READ. Holdmode (H) inhibits register loading for all but the DC modes. The modes are selectable by a front-panel toggle switch or by a five-bit Control register. The module will automatically advance through its five modes by holding the MODE/HOLD switch in the MODE position. This combination of mode selection and the ability to read the Command and Data registers makes the 3291 a valuable tool in checking the integrity of a CAMAC system