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Nick Downing [Mon, 21 Jul 2025 06:21:57 +0000 (16:21 +1000)]
In /scripts/circuits.py and /scripts/blocks.py rename SB_* to *_SUPER, add the TG_LATCH_FB, NOR_SUPER, NOR_SUPER_HD circuits which are used in special cases
Nick Downing [Mon, 21 Jul 2025 05:42:29 +0000 (15:42 +1000)]
In /scripts/circuits.py and /scripts/blocks.py rationalize superbuffer circuits
Nick Downing [Mon, 21 Jul 2025 03:50:20 +0000 (13:50 +1000)]
Renumber ALU slices from 0..7 to 7..0 (from left to right) in block / net names
Nick Downing [Mon, 21 Jul 2025 03:23:36 +0000 (13:23 +1000)]
Implement the SB_NOT (useful) and SB_AND_OR (not so useful) circuits
Nick Downing [Mon, 21 Jul 2025 02:15:18 +0000 (12:15 +1000)]
In /scripts/*.py rename LATCH to TG_LATCH (transmission-gate latch), input_nets to a_nets, output_net to y_net (more consistent with TG_LATCH pin names scheme)
Nick Downing [Mon, 21 Jul 2025 02:11:55 +0000 (12:11 +1000)]
Name ALU and register nets using a combination of automatic and manual methods
Nick Downing [Mon, 21 Jul 2025 00:38:33 +0000 (10:38 +1000)]
In /8085/blocks.png combine vertical ALU and register slices, and some of the random logic blocks, just to make it easier to see the context of the logic
Nick Downing [Mon, 21 Jul 2025 00:18:13 +0000 (10:18 +1000)]
In /8085/blocks.png combine random transistors into nearby blocks (just by guessing), fix /8085/node_names.txt to recover original names of the changed blocks
Nick Downing [Sun, 20 Jul 2025 14:50:45 +0000 (00:50 +1000)]
Add latch subcircuit (transmission gate latch found in e.g. 8085 block_alu22)
Nick Downing [Sun, 20 Jul 2025 14:23:29 +0000 (00:23 +1000)]
Add subcircuit analysis, it can identify an XOR gate made from AND+NOR gates
Nick Downing [Sun, 20 Jul 2025 10:12:33 +0000 (20:12 +1000)]
Make fets.txt / gates.txt object oriented, in preparation for circuit analysis
Nick Downing [Sun, 20 Jul 2025 09:24:58 +0000 (19:24 +1000)]
In /8085 adopt new nomenclature "fets" instead of "channels", so rename /scripts/channels.py to /scripts/fets.py and have it produce the fets.txt file, but in /scripts/fets.py it still mostly refers to channels until it writes the output
Nick Downing [Sun, 20 Jul 2025 05:30:53 +0000 (15:30 +1000)]
Add /scripts/gates.py to analyze pulled-up networks and transform into gates
Nick Downing [Sat, 19 Jul 2025 14:43:28 +0000 (00:43 +1000)]
Add /scripts/blocks.* to generate graphs of each block using dot (graphviz)
Nick Downing [Sat, 19 Jul 2025 02:05:02 +0000 (12:05 +1000)]
Change format of nodes.txt file to have the counts in the header line, code cleanup in /scripts/nodes.py which generates the file, change format of channels.txt file to contain the block, coordinates and mass (capacitance) and improve diff_nets/r_matrix, code cleanup in /scripts/channels.py which generates the file
Nick Downing [Sat, 19 Jul 2025 08:14:46 +0000 (18:14 +1000)]
Swap blocks and pads colours, since there are no node numbers to keep stable anymore, assign names to blocks of at least a certain size
Nick Downing [Sat, 19 Jul 2025 06:40:38 +0000 (16:40 +1000)]
In /8085 adopt new nomenclature "nodes" instead of "nets", because channels and blocks are not technically nets, rename data files and scripts as follows:
/8085/net_names.txt -> /8085/node_names.txt
/8085/sizes.txt -> /8085/node_sizes.txt (generated file)
/scripts/net_channels.py -> /scripts/channels.py
/scripts/net_image.py -> /scripts/node_image.py
/scripts/net_sizes.py -> /scripts/node_sizes.py
/scripts/image_nets.py -> /scripts/nodes.py
Note: Breaks the other directories, will port over latest scripts to them later
Nick Downing [Sat, 19 Jul 2025 06:28:57 +0000 (16:28 +1000)]
Implement automatic net names instead of numbers (by colour and coordinates)
Nick Downing [Sat, 19 Jul 2025 02:05:51 +0000 (12:05 +1000)]
Add /8085/blocks.png which manually separates the chip into any obvious blocks, change /conn_matrix.txt and /Makefile to include blocks.png in the analysis (it will generate reports to indicate the association between channels and blocks)
Nick Downing [Fri, 18 Jul 2025 14:03:26 +0000 (00:03 +1000)]
Add /8085/net_names.txt naming the 41 numerically smallest net numbers
Nick Downing [Fri, 18 Jul 2025 12:57:42 +0000 (22:57 +1000)]
In /8085 put pads layer at beginning of stack, means we cannot see it anymore in the layer/net images but the assignment to item numbers and hence net numbers will be more stable for the external pins, generate layers_rev.png so we can see the top view of chip with pads visible and metal having priority over poly/diff
Nick Downing [Fri, 18 Jul 2025 12:32:37 +0000 (22:32 +1000)]
In /scripts/net_channels.py add resistor solver to determine channel resistance
Nick Downing [Thu, 17 Jul 2025 01:29:07 +0000 (11:29 +1000)]
Add /orig/*_6800.js from https://github.com/trebonian/visual6502.git commit
d8ecc129, add preliminary analysis in /6800 with improved automatic processing relative to /6502, add /6800/notes.txt with ideas for further automatic processing
Nick Downing [Thu, 17 Jul 2025 00:48:00 +0000 (10:48 +1000)]
Improve /scripts/segdefs*.py to allow multiple outlines, revert /scripts/to_mono.py to a 50% threshold so that we can see the pad names in /8085
Nick Downing [Wed, 16 Jul 2025 23:52:21 +0000 (09:52 +1000)]
Add /orig/z80_*.png from https://github.com/gdevic/Z80Explorer.git commit
6c6f15b8, add preliminary analysis in /z80
Nick Downing [Wed, 16 Jul 2025 10:52:43 +0000 (20:52 +1000)]
Add /orig/*_6502.js from https://github.com/trebonian/visual6502.git commit
d8ecc129, add scripts to regenerate the layer images from polygons, add preliminary analysis in /6502 -- it has some problems -- no pads layer, no depletion transistors yet (we don't have polygons for their channels), many missed connections (such as when a via is not automatically generated because it falls within a transistor bounding box) -- need to do a comprehensive comparison of the netlists
Nick Downing [Wed, 16 Jul 2025 05:39:31 +0000 (15:39 +1000)]
Move scripts into /scripts, analysis into /8085, add /8080 based on kinda-polygons from gerber exports in https://github.com/nickd4/vm80a.git commit
cd74c369
Nick Downing [Tue, 15 Jul 2025 14:31:43 +0000 (00:31 +1000)]
New approach where all image processing is done in one pass, saving both net and adjacency information, then transistors are reconstructed from the adjacency
Nick Downing [Mon, 14 Jul 2025 17:19:39 +0000 (03:19 +1000)]
First cut at NMOS IC analysis, can separate layers into contiguous regions with numeric IDs, then follow connections between layers to create numeric nets