P7001: Difference between revisions
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(added short description of the front panel and z-axis cards) |
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To provide maximum flexibility all P7001 circuit cards are connected over an 16 bit asynchronous bus with 13 address lines. The bus is mostly implemented as etched lines on the Main Interface Board. Only some High speed signals are sent through coaxial cables that connect to the cards using [[Peltola connector]]s. A serially connected line, or daisy chain, in the bus establishes device priority. This signal is called "Data Channel Grant Line". Each card has a specific location in the DPO. The position determines the priority that each card has in the use of the address and data buses. Unused slots must be fitted with a jumper card to close the daisy chain. | To provide maximum flexibility all P7001 circuit cards are connected over an 16 bit asynchronous bus with 13 address lines. The bus is mostly implemented as etched lines on the Main Interface Board. Only some High speed signals are sent through coaxial cables that connect to the cards using [[Peltola connector]]s. A serially connected line, or daisy chain, in the bus establishes device priority. This signal is called "Data Channel Grant Line". Each card has a specific location in the DPO. The position determines the priority that each card has in the use of the address and data buses. Unused slots must be fitted with a jumper card to close the daisy chain. | ||
===Front Panel & Z-Axis boards=== | |||
The Front Panel board contains coding and debouncing logic for the 28 pushbuttons and driver logic for the 15 status indicators. The Z-Axis/Front panel card contains circuits for system control and the P7001 status latches. Bus termination, Z-Axis switching circuits and Z Axis Valid sensing are also located on this card. Eighteen of the front-panel buttons are used to communicate with the computer. The SEND and RECEIVE buttons direct the computer to transfer waveforms. The 16 Program call buttons on the right side of the front panel are used to execute user-definable programs on the computer. | |||
===Memory=== | ===Memory=== | ||