A-B 1785-L40C controller

A-B 1785-L40C controller

The access timer logic is duplicated in the VMEchip2 and MCchip ASICs. Because the local bus timer in the VMEchip2 can detect an offboard access and the MCchip local bus timer cannot, the timer in the VMEchip2 is used in all cases except for the version of the MVME162 which does not include the VMEbus interface ("No-VMEbus-Interface option"). Local Bus Arbiter The local bus arbiter implements a fixed priority which is described in the following table.Connectors The MVME162 has two 96-position DIN connectors: P1 and P2. P1 rows A, B, C, and P2 row B provide the VMEbus interconnection. P2 rows A and C provide the connection to the SCSI bus, serial ports, and Ethernet. The MVME162 has a 20-pin connector J4 mounted behind the front panel. When the MVME162 board is enclosed in a chassis and the front panel is not visible, this connector allows the reset, abort, and LED functions to be extended to the control panel of the system, where they are visible. The serial ports on the MVME162 are also connected to two 25-pin DB-25 female connectors J9 and J15 on the front panel.

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