Echelon Neuron - Manual (Page 98)

INC (Increment)
The INC instruction can increment the TOS value or the value of a specified
pointer register. The INC instruction uses the pointer direct addressing mode.
When incrementing TOS, if the TOS value is zero after the increment, this
instruction sets the Carry flag. When incrementing a pointer register, the
pointer-register expression must be in the range 0 to 3.
The INC instruction applies to Series 3100, 5000, and 6000 devices.
Syntax:
The INC instruction for the TOS requires no operands:
INC
The INC instruction for a pointer register requires a single operand to specify the
pointer register:
INC [0]
INC [1]
INC [2]
INC [3]
Table 32 describes the attributes of the INC instruction.
Table 32. INC Instruction
Instruction Hexadecimal
Opcode
Instruction
Size (Bytes)
CPU Cycles
Required
Affect on
Carry Flag
INC 3E 1 2 Modified
INC [0] 34 1 6 None
INC [1] 35 1 6 None
INC [2] 36 1 6 None
INC [3] 37 1 6 None
Example:
The following example calls assumes that TOS contains a loop-control variable
with a negative value. The INC instruction increments TOS. When TOS
becomes zero and Carry flag is set, the BRC instruction branches to the Done
label. As long as the Carry flag is not set, the BR instruction branches to the
Loop label. Thus, this example implements a for loop construct.
Loop ... ; loop body
inc ; ( n )
brc Done
br Loop
88 Neuron Assembly Language Instruction Statements