The 2TP-VME link adapter board (see [2]) provides two 14-pins connectors to convey the transputer Analyse, Reset and Error (ARE) signals for each of the 2TP-VME transputers. By means of these signals the 2TP-VME transputers can be controlled externally.
By means of jumpers on the link adapter board the ARE-signals can be daisy-chained, thus enabling a hostcomputer/controller to control a chain of 2TP-VME transputers or modules.
When the 2TP-VME transputers form a daisy-chain with their ARE-signals, an incoming Error signal can either be handled by the receiving transputer in its event handling routine or passed on along the daisy-chain towards the hostcomputer/controller. Selection of this option is by means of a jumper on the 2TP-VME module (see [1]).
In addition the 2TP-VME contains logic to provide 4 reset-out lines per transputer (one for each transputer link). On the 2TP-VME link adapter board there is a reset-out configured to each 10-pins link connector (as in Parsytec hardware). This scheme enables each transputer on the 2TP-VME to reset individual 2TP-VME transputers connected to its links under software control.
These reset-out signals either can be controlled according to the scheme used by Parsytec hardware/software or according to a scheme resembling the scheme used by INMOS hardware/software:
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A dedicated memory segment is available to control the reset logic (see the memory map in Appendix A).