Preliminary
HT48R06A-1
SNZ [m].i
Skip if bit "i" of the data memory is not zero
Description
If bit "i" of the specified data memory is not zero, the next instruction is
skipped. If bit "i" of the data memory is not zero, the following instruction,
fetched during the current instruction execution, is discarded and a dummy
cycle is replaced to get the proper instruction (two cycles). Otherwise proceed
with the next instruction (one cycle).
Operation
Skip if [m].i¹0
Affected flag(s)
TC2 TC1 TO PD OV
Z
AC
C
¾
¾
¾
¾
¾
¾
¾
¾
SUB A,[m]
Subtract data memory from the accumulator
Description
The specified data memory is subtracted from the contents of the accumula-
tor, leaving the result in the accumulator.
Operation
ACC ¬ ACC+[m]+1
Affected flag(s)
TC2 TC1 TO PD OV
Z
AC
C
¾
¾
¾
¾
Ö
Ö
Ö
Ö
SUBM A,[m]
Subtract data memory from the accumulator
Description
The specified data memory is subtracted from the contents of the accumula-
tor, leaving the result in the data memory.
Operation
[m] ¬ ACC+[m]+1
Affected flag(s)
TC2 TC1 TO PD OV
Z
AC
C
¾
¾
¾
¾
Ö
Ö
Ö
Ö
SUB A,x
Subtract immediate data from the accumulator
Description
The immediate data specified by the code is subtracted from the contents of
the accumulator, leaving the result in the accumulator.
Operation
ACC ¬ ACC+x+1
Affected flag(s)
TC2 TC1 TO PD OV
Z
AC
C
¾
¾
¾
¾
Ö
Ö
Ö
Ö
40
February 25, 2000
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
