1267
Model Conversion Instructions (Unit Ver. 3.0 or Later) Section 3-35
Description Data Distribution Operation
DISTC(566) copies S to the destination word calculated by adding Of to Bs.
The same DISTC(566) instruction can be used to distribute the source word
to various words in the data area by changing the value of Of.
Stack Push Operation
When the leftmost digit (bits 12 to 15) of Of is 9 BCD, DISTC(566) operates a
stack from Bs to Bs+Of-9000. The destination base address (Bs) contains the
stack pointer and the rest of the words in the stack contain the stack data.
DISTC(566) copies S to the destination word calculated by adding the stack
pointer (content of Bs) + 1 to address Bs. The same DISTC(566) instruction
can be used to distribute the source word to various words in the data area by
changing the value of Of.
EM Area with bank En_00000 to En_32767
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants #0000 to #FFFF
(binary)
--- #0000 to #7999
for distribution
#9000 to #9999
for stack operation
Data Registers DR0 to DR15 --- DR0 to DR15
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047, IR0 to –2048 to +2047, IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –) IR0 to, –(– –) IR15
Area S Bs Of
S
Bs+n
OfBs
S
OfBs
Bs+1
Stack area
Stack
pointer
Stack
data area
m words
Size of
stack area
9
m
Bs+ +1
Bs+(m-1)
S is copied to:
Bs + stack pointer + 1.
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