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31
x
x
x
x
x
x
x
4.3 64-Bit SCRIPTS Selectors
Register: 0x5A–0x5B
Reserved
Registers: 0x5C–0x5F
Scratch Register B (SCRATCHB)
Read/Write
x
x
x
x
x
x
x
SCRATCHB
Scratch Register B
This is a general purpose user definable scratch pad
register. Apart from CPU access, only register
Read/Write and Memory Moves directed at the
SCRATCH register will alter its contents. The power-up
values are indeterminate. A special mode of this register
can be enabled by setting the PCI Configuration Into
Enable bit in the
bit is set, the SCRATCH B register returns bits [31:12] of
the SCRIPTS RAM PCI
(SCRIPTS RAM)
register when read. When read, bits [11:0] of SCRATCH
B will always return zeros in this mode. Writes to the
SCRATCH B register are unaffected. Resetting the PCI
Configuration Into Enable bit causes the SCRATCH B
register to return to normal operation.
Registers: 0x60–0x9F
Scratch Registers C–R (SCRATCHC–SCRATCHR)
Read/Write
These are general purpose user definable scratch pad registers. Apart
from CPU access, only register read/write, memory moves and Load and
Stores directed at a SCRATCH register will alter its contents. The
power-up values are indeterminate.
The following registers are used to hold the upper 32-bit addresses for
various SCRIPTS operations. When a particular type of SCRIPTS
64-Bit SCRIPTS Selectors
SCRATCHB
x
x
x
x
x
x
x
Chip Test Two (CTEST2)
Base Address Register Two
in bits [31:12] of the SCRATCH B
x
x
x
x
x
x
x
register. If this
0
x
x
x
x
[31:0]
4-99
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