From 3587bb675bdfc096cb750d8488b6151cc35a63e7 Mon Sep 17 00:00:00 2001
From: Nick Downing <nick@ndcode.org>
Date: Mon, 21 Jul 2025 12:11:55 +1000
Subject: [PATCH] Name ALU and register nets using a combination of automatic
 and manual methods

---
 8085/node_names.txt       | 884 ++++++++++++++++++++++++++++++++++++++
 scripts/blocks.py         |  16 +-
 scripts/xref_net_names.py |  43 ++
 3 files changed, 942 insertions(+), 1 deletion(-)
 create mode 100755 scripts/xref_net_names.py

diff --git a/8085/node_names.txt b/8085/node_names.txt
index 9108c96..59d1262 100644
--- a/8085/node_names.txt
+++ b/8085/node_names.txt
@@ -148,3 +148,887 @@
 2_5073_5176 pad_READY
 3_0455_4632 phi0
 3_0304_3500 phi1
+3_0340_4521 bus_d0
+3_0358_4087 bus_d1
+3_0373_4519 bus_d2
+3_0393_3400 bus_d3
+3_0407_4521 bus_d4
+3_0428_4695 bus_d5
+3_0431_4675 bus_d6
+3_0443_4655 bus_d7
+3_0651_3587 alu7_0
+3_0682_3609 alu7_1
+3_0703_3680 alu7_2
+3_0727_3609 alu7_3
+3_0744_3746 alu7_4
+3_0818_3471 alu03_0
+3_0843_3413 alu7_5
+3_0955_3427 alu7_6
+3_1014_0982 reg3_0
+3_1014_1033 alu_c0
+3_1014_1219 alu_oen_dx
+3_1023_3471 alu0_0
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+3_1071_1871 alu34_0
+3_1081_0982 reg0_0
+3_1090_1164 alu0_3
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+3_1127_1244 alu012_0
+3_1127_1946 alu356_0
+3_1154_3537 alu_1
+3_1167_1117 alu_sel_qd
+3_1185_1141 alu_sel_qy
+3_1204_1127 alu_y7
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diff --git a/scripts/blocks.py b/scripts/blocks.py
index 15aab6c..dfdf093 100755
--- a/scripts/blocks.py
+++ b/scripts/blocks.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+import os
 import re
 import sys
 
@@ -9,8 +10,12 @@ SYMBOL_TYPE_XOR = 2
 SYMBOL_TYPE_LATCH = 3
 N_SYMBOL_TYPES = 4
 
+dump_nets = False
+if len(sys.argv) >= 2 and sys.argv[1] == '--dump_nets':
+  dump_nets = True
+  del sys.argv[1]
 if len(sys.argv) < 3:
-  print(f'usage: {sys.argv[0]:s} symbols.txt dot_dir')
+  print(f'usage: {sys.argv[0]:s} [--dump_nets] symbols.txt dot_dir')
   sys.exit(1)
 symbols_txt = sys.argv[1]
 dot_dir = sys.argv[2]
@@ -118,6 +123,15 @@ with open(symbols_txt) as fin:
 
     line = fin.readline()
 
+if dump_nets:
+  for net, net_blocks in sorted(nets.items()):
+    for block in sorted(net_blocks):
+      print(net, block)
+
+try:
+  os.mkdir(dot_dir)
+except FileExistsError:
+  pass
 for block, block_symbols in sorted(blocks.items()):
   with open(f'{dot_dir:s}/{block:s}.dot', 'w') as fout:
     fout.write(f'digraph "{block:s}" {{\n')
diff --git a/scripts/xref_net_names.py b/scripts/xref_net_names.py
new file mode 100755
index 0000000..c8f1297
--- /dev/null
+++ b/scripts/xref_net_names.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+
+import sys
+
+# takes list of net name, block name from /scripts/blocks.py --dump_nets
+# where net name is repeated (occurs in multiple blocks), synthesize a new
+# block name from the list of blocks where it occurs e.g. alu6, alu7 -> alu67
+# then for each block name, name its nets by the block name + sequence number
+
+nets = {}
+for line in sys.stdin:
+  [net, block] = line.split()
+  if net not in nets:
+    nets[net] = set()
+  nets[net].add(block)
+
+blocks = {}
+for net, net_blocks in sorted(nets.items()):
+  net_blocks = sorted(net_blocks)
+  prefix = net_blocks[0]
+  for block in net_blocks[1:]:
+    i = 0
+    while i < len(prefix) and i < len(block) and prefix[i] == block[i]:
+      i += 1
+    prefix = prefix[:i]
+  block = prefix
+  if len(net_blocks) < 5: # arbitrary cutoff: if >= 5 blocks it looks global
+    block += ''.join([block[len(prefix):] for block in net_blocks])
+  if block[:6] == 'block_':
+    block = block[6:]
+  if block not in blocks:
+    blocks[block] = set()
+  blocks[block].add(net)
+
+nets = []
+for block, block_nets in sorted(blocks.items()):
+  block_nets = sorted(block_nets)
+  nets.extend(
+    [(block_nets[i], f'{block}_{i:d}') for i in range(len(block_nets))]
+  )
+
+for net, block in sorted(nets):
+  print(net, block)
-- 
2.34.1