LSI 53C810A User Manual
Page 147
Block Move Instructions
6-7
Note:
Do not use indirect and table indirect addressing
simultaneously; use only one addressing method at a time.
TIA
Table Indirect Addressing
28
When this bit is set, the 24-bit signed value in the start
address of the move is treated as a relative displacement
from the value in the
register. Both the transfer count and the source/
destination address are fetched from this location.
Use the signed integer offset in bits [23:0] of the second
four bytes of the instruction, added to the value in the
register, to fetch first the
byte count and then the data address. The signed value
is combined with the data structure base address to
generate the physical address used to fetch values from
the data structure. Sign extended values of all ones for
negative values are allowed, but bits [31:24] are ignored.
Command
Not Used
Don’t Care
Table Offset