Echelon Neuron - Manual (Page 209)

Mnemonic Operand Operation Description
DIV TEMP = int([DSP] ÷ TOS)
TOS = int([DSP] % TOS)
[DSP] = TEMP
IP++ Divide unsigned integer in
NEXT by unsigned integer in
TOS.
Place unsigned quotient in
TOS, unsigned remainder in
NEXT.
Division by zero results in a
quotient of 0xFF and the
remainder equal to the
dividend. If enabled, it will
cause a trap but will not result
in a reset.
DROP
NEXT DSP--
IP = IP+1 Remove NEXT from data
stack.
DROP [RSP] RSP++
IP = IP+1 Remove top byte from return
stack.
DROP TOS TOS = [DSP--]
IP = IP+1 Remove TOS from data stack.
DROP_R NEXT DSP--
Return Remove NEXT from data
stack. Return to caller.
DROP_R TOS DSP--
Return Remove TOS from data stack.
Return to caller.
INC TOS = TOS +1
IF result > 255
C = 1
ELSE
C = 0
IP = IP+1 Increment TOS.
INC [PTR] [BP + (PTR * 2)]++
IP = IP+1 Increment 2-byte PTR.
MUL [DSP]:TOS = TOS * [DSP]
IP++ Multiply unsigned integer
stack elements NEXT:TOS =
NEXT * TOS.
Place unsigned 16-bit result in
TOS and NEXT.
Neuron Assembly Language Reference 199