Meiko Computing Surface CS-2, Руководство пользователя

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S1002–10M128.02
3
At the Rear of the Module
Upper 8 cards slots:
Up to eight module switch cards (MK511 or MK512) are fitted in the upper
card slots.
Lower 5 card slots:
Up to 4 module SCSI cards (MK516) and 1 module control card (MK515)
may be fitted to the lower card slots.
Warning – The module switch cards, module contr oller card, and the mod-
ule SCSI cards ar e not user serviceable. They should only be fitted or r e-
moved by trained engineers.
At the Front of the Module
Behind the front panel are four polarised 50-way connectors. Two of these are
used to connect to the MK525 module LED board. Fit the board to the upper con-
nectors when the module is mounted on the lower shelf of a bay, and the lower
connectors when the module is mounted on the upper shelf.
The connectors for the 4 processor boards and the 4 disk carriers are also located
behind the front panel.
Warning – Pr ocessor cards and disk devices ar e not user serviceable. They
should only be fitted or r emoved by trained engineers.
External Indicators
A number of LEDs are visible through the tinted window of the module’s front
panel.
Four 4
×
4 matrices of red LEDs are driven by the processor boards. The SPARC
processor on single SPARC boards controls all 16 LEDs, whereas each processor
on a 4-SPARC board controls one row or four lights. The default patterns shown
on the LEDs are generated by the Boot PROM and the Operating System — the