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DEFINITY Made Easy Tools
Issue 2, November 2000
DEFINITY Hardware
TN790
The TN790 processor circuit pack is a circuit pack level replacement for the TN786B/CPP1 combination. The TN790 does not support a mezzanine board for memory expansion (no CPP1 circuit pack is used). The TN790 provides a performance increase over the TN786B/CPP1 combination.
The Reduced Instruction Set Computer (RISC) processor platform runs at 40 MHz and includes all of the functions of the TN786B processor circuit pack as well as providing an operating system base more common with R7r or later. Diagnostics for the TN790 are enhanced over earlier systems. The TN790 is compatible with the processor interface circuit pack (TN765), the PACCON circuit pack (TN778), the NETCON circuit pack (TN777B), and the duplication interface circuit pack (TN772).
The TN790 is available in R6 and some earlier systems. The TN790 provides 16 MBytes of Flash PROM (programmable read only memory). The PROM is compatible with the NETCON Flash cards and is programmed using the +12 VDC supplied by the NETCON circuit pack.
The TN790 is factory-populated with a minimum of 16 MBytes of Dynamic Random Access Memory (DRAM).