Advanced Function Instruction
7-23
FUN 48 P
DIST
NIBBLE DISTRIBUTE
FUN 48 P
DIST
S : Source data to be distributed
N : Number of nibbles to be distributed
D : Starting register storing distribution data
S, N, D may combine with V, Z, P0~P9 to
serve indirect address application
WX WY WM WS TMR CTR HR IR OR SR ROR DR K XR
Range
Ope-
rand
WX0
∣
WX240
WY0
∣
WY240
WM0
∣
WM1896
WS0
∣
WS984
T0
∣
T255
C0
∣
C255
R0
∣
R3839
R3840
∣
R3903
R3904
∣
R3967
R3968
∣
R4167
R5000
∣
R8071
D0
∣
D4095
16-bit
+/-
number
V、Z
P0~P9
S ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
N ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 1~4 ○
D ○ ○ ○ ○ ○ ○ ○ ○* ○* ○ ○
z When distribution control "EN" = 1 or "EN↑" ( P instruction) has a transition from 0 to 1, will take N
successive nibbles starting from the lowest nibble NB0 within S, and distribute them in ascending order into
the 0 nibbles of N registers starting from D. The nibbles other than NB0 in each of the registers within D are
all set to zero. (A nibble is comprised by 4 bits. Starting from the lowest bit in a register, B0, each successive
4 bits form a nibble, so B0~B3 form nibble 0, B4~B7 form nibble 1, etc...)
z This instruction only provides WORD (16 bit) operand. Therefore there are usually only 4 nibbles can be
involved, so the effective value of N is 1~4. Beyond this range, will set the N value error flag "ERR" to 1, and
do not carry out this instruction.
X0
EN
S :
N :
3
ERR
D :
48P.DIST
WY 0
R 0
z The instruction at left writes NB0~NB2 from the WX0
register into the NB0 of the 3 consecutive registers
R0~R2.
N=3 NB3 NB2 NB1 NB0
X15 X11 X0 B15 B0
S WX0 0000 0100 0010 0001 D R0 0000 0000 0000 0001
NB3 NB2 NB1 NB0
D+1 R1 0 0 0 0 0000 0000 0010
D+2 R2 0 0 0 0 0000 0000 0100
Ö
X0＝
NB1～NB3 are all set a "0 "
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