.PS
# `AlogixDPV.m4'
log_init(svg_font(sans-serif,10.5bp__))
# A modest expression in default form
A: Autologix(
Nand(And(Or(A,C),Or(B,~C),Or(~A,B,C)),Ck);
Nand(~A,B)@with .n at last [].s+(0,-2bp__))
"svg_it(Out1)" at A.Out1 ljust
"svg_it(Out2)" at A.Out2 ljust
Loopover_(`v_', `"svg_it(v_)" at A.In`'v_ above ', A,B,C,Ck)
move left 0.2 from A.w
"svg_tt(`Autologix(')" wid 68bp__ with .w at A.sw+(0,-0.15)
"svg_tt(`Nand(And(Or(A,C),Or(B,~C),Or(~A,B,C)),Ck);')" \
wid 305bp__ with .w at last "".w+(0.2,-0.18)
"svg_tt(`Nand(~A,B)@with .n at last [].s+(0,-2bp__))')"\
wid 313bp__ with .w at last "".w+(0,-0.18)
# Draw a tree of gates only. The ~ has been
# replaced by NOT gates.
B: Autologix(Or(And(B,Not(C)),And(Not(A),B,C)),N, shaded "lightblue" ) \
with .sw at A.e+(1.3,-0.5)
"svg_it(Out)" at B.Out above ljust
"svg_tt(`Autologix(Or(And(B,Not(C)),')" wid 165bp__ \
with .w at B.sw+(-0.6,-0.15)
"svg_tt(`And(Not(A),B,C)),N,')" wid 122bp__ with .w at last "".w+(1.1,-0.18)
"svg_tt(`shaded \"lightblue\")')" wid 120bp__ \
with .w at last "".w+(0,-0.18)
for_(1,4,1,`"svg_it(B.In`'m4x)" at B.In`'m4x rjust')
"svg_it(B.In5)" at B.In5+(0,-1.5bp__) rjust
# Here is how to include an arbitrary circuit
# that is not one of the standard gates.
# First, define the circuit with a name ending
# in _gate. Make sure its inputs are on the left
# and named In1, In2, ... and the output Out
# is on the right.
define(`SR_gate',`[
S: NOR_gate
R: NOR_gate at S+(0,-L_unit*(AND_ht+4))
w = (S.Out.x-R.In1.x)/3
v = 2*L_unit
line right_ dimen_/2 from S.Out
Out: Here
TR: R.In1-(v,0)
line from S.Out+(v,0) down w*3/2 then left S.Out.x-TR.x+v down w \
then to TR then to R.In1
TS: S.In2-(v,0);
line from R.Out right v then up w*3/2 then left R.Out.x-TS.x+v up w \
then to TS then to S.In2
In1: S.In1
In2: R.In2 ]')
# Now define the function by which the circuit
# will be invoked:
define(`SRff',`_AutoGate(SR,$@)')
# You are done. Here is an example:
G: [
F: Autologix(SRff(And(x,y),Nand(x,y)),LRV)
"svg_it(x)" at F.Inx rjust
"svg_it(y)" at F.Iny rjust
"svg_it(Out)" at F.Out ljust
] with .sw at A.n+(0.5,-0.25)
"svg_tt(`Autologix(SRff(And(x,y),Nand(x,y)),LRV)')" wid 285pt__ \
with .w at last [].sw+(0,-10pt__)
undefine(`extras')
define(`extras')
ifdef(`extras',`
Q1: Autologix(Nor(Nor(A,And(B,C)),Nand(Not(B),D))) \
with .nw at A.sw+(0,-61bp__)
Loopover_(`x',`"x" wid 7bp__ at last [].In`'x above',A,B,C,D)
"svg_tt(`Q1: Autologix(Nor(Nor(A,And(B,C)),Nand(Not(B),D)),options)')" \
wid 363bp__ with .nw at Q1.sw+(0,-10bp__)
"svg_tt(`Loopover_(`x',`\"svg_it(x)\" at last [].In`'x above',A,B,C,D)')" \
wid 431bp__ with .nw at last "".sw+(0,-5bp__)
Q2: Autologix(Nor(Nor(A,And(B,~C)),Nand(Not(B),D)),V) \
with .nw at last "".sw+(0,-16bp__)
Loopover_(`x',`"x" at last [].In`'x above',A,B,C,D)
"V" at last [].se above rjust
Q3: Autologix(Nor(Nor(A,And(B,C)),Nand(Not(B),D)),R) \
with .nw at last [].sw+(0,-0.2)
Loopover_(`x',`"x" at last [].In`'x above',A,B,C,D)
"R" at last [].se above rjust
Q4: Autologix(Nor(Nor(A,And(B,C)),Nand(Not(B),D)),RV) \
with .nw at last [].sw+(0,-0.2)
Loopover_(`x',`"x" at last [].In`'x above',A,B,C,D)
"RV" at last [].se above rjust
Autologix(Nor(Nor(A,And(B,C)),Nand(Not(B),D)),LRV) \
with .Out at Q4.Out+(3.5,0)
Loopover_(`x',`"x" at last [].In`'x rjust',A,B,C,D)
"LRV" at last [].se above rjust
Autologix(Nor(Nor(A,And(B,C)),Nand(Not(B),D)),LR;offset=-L_unit*1.5) \
with .Out at Q3.Out+(3.5,0)
Loopover_(`x',`"x" at last [].In`'x rjust',A,B,C,D)
"LR" at last [].se above rjust
Autologix(Nor(Nor(A,And(B,~C)),Nand(Not(B),D)),LV;offset=L_unit*2) \
with .Out at Q2.Out+(3.5,0)
Loopover_(`x',`"x" at last [].In`'x rjust',A,B,C,D)
"LV" at last [].se above rjust
Autologix(Nor(Nor(A,And(B,C)),Nand(Not(B),D)),L) \
with .Out at Q1.Out+(3.5,0)
Loopover_(`x',`"x" at last [].In`'x rjust',A,B,C,D)
"L" at last [].se above rjust
')
command "" # end font
.PE