Technical data

Modifying the Environment
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Master Ending Address #4 00000000 Ending address of the VMEbus resource that is
accessible from the local bus. Default is $0.
Master Address Translation
Address #4
00000000 This register allows the VMEbus address and
the local address to differ. The value in this
register is the base address of the VMEbus
resource that is associated with the starting and
ending address selection from the previous
questions. Default is 0.
Master Address Translation Select
#4
00000000 This register defines which bits of the address
are significant. A logical "1" indicates
significant address bits, logical "0" is non-
significant. Default is 0.
Master Control #4 00 Defines the access characteristics for the
address space defined with this master address
decoder. Default is $00.
Short I/O (VMEbus A16) Enable
[Y/N]
Y Yes, Enable the Short I/O Address Decoder.
Short I/O (VMEbus A16) Control 01 Defines the access characteristics for the
address space defined with the Short I/O
address decoder. Default is $01.
F-Page (VMEbus A24) Enable
[Y/N]
Y Yes, Enable the F-Page Address Decoder.
F-Page (VMEbus A24) Control 02 Defines the access characteristics for the
address space defined with the F-Page address
decoder. Default is $02.
ROM Speed Bank A Code 04 Defines the ROM access time. The default is
$04, which sets an access time of five clock
cycles of the local bus.
ROM Speed Bank B Code 04
Static RAM Speed Code 02 Defines the SRAM access time. Default is $02.
PCC2 Vector Base
VMEC2 Vector Base #1
VMEC2 Vector Base #2
05
06
07
Base interrupt vector for the component
specified. Default: PCCchip2 = $05,
VMEchip2 Vector 1 = $06, VMEchip2 Vector
2 = $07.
VMEC2 GCSR Group Base
Address
D2 Specifies group address ($FFFFXX00) in Short
I/O for this board. Default = $D2.
Table 3-3. ENV Command Parameters (Continued)
ENV Parameter and Options Default Meaning of Default