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Hardware Preparation and Installation
1
Board EPROM/Flash Mode (S4)
1-10
Note
As shown in the preceding table, the MVME177P
Petra/MCECC interface supports on-board ECC DRAM
emulations up to 128MB. For sizes beyond 128MB, the
MVME177P accommodates memory mezzanines of the
types used on previous MVME177 boards. One additional
mezzanine can be plugged in to provide up to 128MB of
additional DRAM.
The MVME167P and MVME177P single-board computers share a
common board artwork. The two segments of switch S4 jointly define the
board EPROM controller model (MVME167 EPROM-only or MVME177
EPROM/Flash) to be emulated when the board initializes.
With S4 segment 1 set to
MVME167P. Setting S4 segment 1 to
MVME177P case) initializes the board in MVME177P mode. Segment 2
selects between Flash-only and EPROM/Flash mode on MVME177P
boards. [In the MVME167P case, the position of S4 segment 2 plays no
role in configuration.]
On the MVME177P, the EPROMs share 2MB of memory space with the
first 2MB of Flash memory. The EPROM can coexist with 2MB of Flash,
or you may wish to program all 4MB as Flash memory. The Flash and
EPROM configuration is jointly controlled by the setting of S4 and the
setting of a control bit (GPIO2) in the VMEchip2 ASIC.
For further details, refer to
Programmer's Reference Guide listed under "Related Documentation" in
Appendix E.
ON
2
1
, firmware recognizes the board as an
OFF
(factory configuration in the
ON
Flash Memory
in Chapter 4 and to the
S4
OFF
MVME177 EPROM/Flash mode
(factory configuration )
Computer Group Literature Center Web Site
2736 0004 (3-3)
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