Meiko Computing Surface CS-2, Руководство пользователя

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S1002–10M128.02
4
As newer higher performance SPARC modules become available, Meiko will of-
fer these as field upgrade options. Simply unplug the old unit and replace with
the new.
SBus Modules
Three SBus slots are provided and these may be fitted with standard SBus mod-
ules. As with the processor modules SBus modules are simply plugged into the
SBus connectors and secured with 2 screws. When using SBus cards that have
external connections, for example a graphics card, remove the appropriate panel
from the front of the MK401 — the panel is held in place by two small screws.
SBus devices are numbered from 0 to 2, device 0 being next to the processor
slots. Device 4 is the on-board Ethernet and SCSI bus. Device 5 is the second on-
board SCSI bus.
Memory
Up to 16 single in-line memory modules (SIMMs) may be fitted to the MK401
board (JEDEC 36 bit SIMMs). The array is constructed of 4 groups of 4 SIMMs,
arranged as shown in Figure 4-2. Within each group the SIMMs must be identi-
cal, but there is no requirement for the groups to be the same.
SIMMs can be either 4 Mbit DRAM or 16 Mbit DRAM technology, either single
or double sided. This gives a minimum memory configuration of 16 Mbytes and
a maximum of 512 Mbytes.
Figure 4-2 Memory slots on an MK401; the dotted region shows one of the
4 groups of 4 memory slots.