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# Opcodes and mnemonics of MIXAL.
# From the endpapers in Knuth.
#
# A `-' in the mnemonic stands for any of the general
# registers (A, X, and 1 through 6). The C value then
# is the opcode for register A; the other opcodes are
# at a constant offset for each register.
#
# C is the opcode, or `x' for directives.
#
# F is the default F value for operands ((0:5) if blank).
#
# An `x' in `field?' means the operand to an intruction
# of the given type must NOT specify the F value, because
# F is hardwired.
#
# OP C F field?
#-----------------------------
nop 00 0
add 01
sub 02
mul 03
div 04
num 05 0 x
char 05 1 x
hlt 05 2 x
sla 06 0 x
sra 06 1 x
slax 06 2 x
srax 06 3 x
slc 06 4 x
src 06 5 x
move 07 1
ld- 08
ld-n 16
st- 24
stj 32 2
stz 33
jbus 34 0
ioc 35 0
in 36 0
out 37 0
jred 38 0
jmp 39 0 x
jsj 39 1 x
jov 39 2 x
jnov 39 3 x
jl 39 4 x
je 39 5 x
jg 39 6 x
jge 39 7 x
jne 39 8 x
jle 39 9 x
j-n 40 0 x
j-z 40 1 x
j-p 40 2 x
j-nn 40 3 x
j-nz 40 4 x
j-np 40 5 x
inc- 48 0 x
dec- 48 1 x
ent- 48 2 x
enn- 48 3 x
cmp- 56
orig x
equ x
alf x
con x
end x
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