I claim:
1. A depth-extendable display track unit consisting of at least two essentially identical standard depth display tracks for forming a single depth-extended display track from one of said standard depth display tracks and at least one section of another of said standard depth display tracks, each of said essentially identical standard depth display tracks comprising:
(A) a front section;
(B) a breakaway back section with rear engagement means at the rear thereof; and
(C) an interconnected series of breakaway intermediate sections connecting said front and back sections;
said intermediate and back sections defining at the front of each such section forward engagement means for engagement with said rear engagement means at the rear of said back section, said forward engagement means being exposed for engagement by breaking away of the immediately forward section.
2. The unit of claim 1 wherein, in each of said essentially identical standard depth display tracks, said rear engagement means projects rearwardly from said back section and said forward engagement means is configured and dimensioned to receive therein said rear engagement means.
3. The unit of claim 1 wherein, in each of said essentially identical standard depth display tracks, said front section defines at the front thereof stop means for limiting forward movement of articles on said standard depth display track.
4. The unit of claim 1 wherein, in each of said essentially identical standard depth display tracks, at least one of said intermediate sections differs in depth from at least one other of said intermediate sections.
5. The unit of claim 1 wherein, in each of said essentially identical standard depth display tracks, said forward engagement means is female in nature, said rear engagement means is male in nature, and said forward and rear engagement means cooperatively form a malefemale engagement.
6. The unit of claim 1 wherein, in each of said essentially identical standard depth display tracks, said forward and rear engagement means are disposed below the level of an article-supporting surface of said intermediate and back sections.
7. A depth-extendable display track unit consisting of at least two essentially identical standard depth display tracks for forming a single depth-extended display track from one of said standard depth display tracks and at least one section of another of said standard depth display tracks, each of said essentially identical standard depth display tracks comprising:
(A) a front section;
(B) a breakaway back section with rear engagement means projecting rearwardly from the rear thereof; and
(C) an interconnected series of breakaway intermediate sections connecting said front and back sections, at least one of said intermediate sections differing in depth from at least one other of said intermediate sections.;
said intermediate and back sections defining at the front of each such section forward engagement means configured and dimensioned to engage said rear engagement means at the rear of said back section, said forward engagement means being exposed for engagement by breaking away of the immediately forward section, said forward and rear engagement means cooperatively forming a malefemale engagement.
8. The unit of claim 7 wherein, in each of said essentially identical standard depth display tracks, said forward and rear engagement means are disposed below the level of an article-supporting surface of said intermediate and back sections.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A target system comprising:
A. a communications link that includes a test data input signal, a test data output signal, a test clock signal, and a test mode select signal;
B. a first remote device including:
i. first scan test logic including a first test access port controller having a test clock input and a test mode select input, the first test access port controller including a state machine having the states of TEST LOGIC RESET, RUN TEST IDLE, SELECT-DR, CAPTURE-DR, SHIFT-DR, EXIT1-DR, PAUSE-DR, EXIT2-DR, and UPDATE-DR; and
ii. first adapter circuitry including a second test access port controller having a test clock input and a test mode select input, the first adapter circuitry being connected to the communications link signals and selectively coupling the first scan test logic to the communications link signals, the second test access port controller including a state machine having the states of TEST LOGIC RESET, RUN TEST IDLE, SELECT-DR, CAPTURE-DR, SHIFT-DR, EXIT1-DR, PAUSE-DR, EXIT2-DR, and UPDATE-DR, the first adapter circuitry at power up connecting the test clock signal to the test clock inputs of the controllers of the first adapter circuitry and the first scan test logic and connecting the test mode select signal to the test mode select inputs of the controllers of the first adapter circuitry and the first scan test logic, causing both the first and second test access port controllers to cycle to the IDLE state, and then decoupling the first controller of the first scan test logic from the test clock signal while recognizing a serial, synchronization point sequence on the test mode select input; and
C. a second remote device including:
i. second scan test logic including a third test access port controller having a test clock input and a test mode select input, the third test access port controller including a state machine having the states of TEST LOGIC RESET, RUN TEST IDLE, SELECT-DR, CAPTURE-DR, SHIFT-DR, EXIT1-DR, PAUSE-DR, EXIT2-DR, and UPDATE-DR; and
ii. second adapter circuitry including a fourth test access port controller having a test clock input and a test mode select input, the second adapter circuitry being connected to the communications link signals and selectively coupling the second scan test logic to the communications link signals, the fourth test access port controller including a state machine having the states of TEST LOGIC RESET, RUN TEST IDLE, SELECT-DR, CAPTURE-DR, SHIFT-DR, EXIT1-DR, PAUSE-DR, EXIT2-DR, and UPDATE-DR, the second adapter circuitry at power up connecting the test clock signal to the test clock inputs of the controllers of the second adapter circuitry and the second scan test logic and connecting the test mode select signal to the test mode select inputs of the controllers of the second adapter circuitry and the second scan test logic, causing both the third and fourth test access port controllers to cycle to the IDLE state, and then decoupling the third controller of the second scan test logic from the test clock signal while recognizing a serial, synchronization point sequence on the test mode select input.
2. The target system of claim 1 in which the state machines of all the test access port controllers also cycle through the states of SELECT-IR, CAPTURE-IR, SHIFT-IR, EXIT1-IR, PAUSE-IR, EXIT2-IR, and UPDATE-IR.
3. The target system of claim 1 including core logic coupled to the scan test logic.
4. The target system of claim 1 in which the adapter circuitry includes a test data input and a test data output.