Echelon Neuron - Manual (Page 208)

Mnemonic Operand Operation Description
BRZ label IF [TOS]=0
IP = IP+SD
TOS = [DSP--]
IP = IP+2 Drop TOS, branch if TOS was
zero.
The IP-relative displacement
SD ranges from -128 to 127.
CALL label [RSP--] = LSB (IP+1)
[RSP--] = MSB (IP+1)
IP = absolute address Call function.
Absolute address is 13 bits.
CALLF word-label [RSP--] = LSB (IP+2)
[RSP--] = MSB (IP+2)
IP = absolute address Call far function using a 16-bit
address.
CALLR label [RSP--] = LSB (IP+1)
[RSP--]= MSB (IP+1)
IP = IP+SD
IP = IP+2 Call a function using relative
addressing.
The IP-relative displacement
SD ranges from -128 to 127.
DBRNZ label IF [--[RSP+1]] <> 0
IP = IP +SD
ELSE
RSP++
IP = IP+2 Decrement the top of the
return stack and branch if it is
not zero, else drop [RSP].
The IP-relative displacement
SD ranges from -128 to 127.
DEALLOC #literal DSP = DSP - literal
IPH = [++RSP]
IPL = [++RSP]
IP = IP+1 Move DSP by literal and
return.
Literal range is 1 to 8.
DEC TOS = TOS - 1
IF result < 0
C = 1
ELSE
C = 0
IP = IP+1 Decrement TOS.
198 Neuron Assembly Instructions Listed by Mnemonic