From 1e3961030578c69180992f46096ef24ea2f4c3a5 Mon Sep 17 00:00:00 2001
From: Jan Tuomi <jan@jantuomi.fi>
Date: Wed, 19 Mar 2025 22:24:47 +0200
Subject: Implement working serial repl

---
 atk16_fpga/hardware.svg | 463 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 463 insertions(+)
 create mode 100644 atk16_fpga/hardware.svg

(limited to 'atk16_fpga/hardware.svg')

diff --git a/atk16_fpga/hardware.svg b/atk16_fpga/hardware.svg
new file mode 100644
index 0000000..66b633e
--- /dev/null
+++ b/atk16_fpga/hardware.svg
@@ -0,0 +1,463 @@
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+<title>n23:e&#45;&gt;c35:w</title>
+<path fill="none" stroke="#1b9e77" d="M317.08,-410.5C342.83,-410.5 351.76,-415.12 372.78,-416.41"/>
+<polygon fill="#1b9e77" stroke="#1b9e77" points="372.59,-419.91 382.69,-416.71 372.8,-412.91 372.59,-419.91"/>
+</g>
+<!-- n24 -->
+<g id="node12" class="node">
+<title>n24</title>
+<polygon fill="none" stroke="black" points="300.29,-349.04 300.29,-363.96 270.97,-374.5 229.52,-374.5 200.2,-363.96 200.2,-349.04 229.52,-338.5 270.97,-338.5 300.29,-349.04"/>
+<text text-anchor="middle" x="250.25" y="-351.45" font-family="Times,serif" font-size="14.00">SYSCLK</text>
+</g>
+<!-- n24&#45;&gt;c35 -->
+<g id="edge28" class="edge">
+<title>n24:e&#45;&gt;c35:w</title>
+<path fill="none" stroke="#1b9e77" d="M301.76,-356.5C325.63,-356.5 333.1,-365.01 348.2,-383.5 377.02,-418.8 341.73,-478.27 372.9,-488.67"/>
+<polygon fill="#1b9e77" stroke="#1b9e77" points="372.32,-492.13 382.7,-490.04 373.28,-485.19 372.32,-492.13"/>
+</g>
+<!-- n24&#45;&gt;c39 -->
+<g id="edge29" class="edge">
+<title>n24:e&#45;&gt;c39:w</title>
+<path fill="none" stroke="#1b9e77" d="M301.76,-356.5C494.05,-356.5 581.49,-429.36 731.86,-309.5 760.73,-286.48 733.96,-236.27 756.56,-225.19"/>
+<polygon fill="#1b9e77" stroke="#1b9e77" points="757.22,-228.63 766.37,-223.29 755.89,-221.76 757.22,-228.63"/>
+</g>
+<!-- n24&#45;&gt;p6 -->
+<g id="edge30" class="edge">
+<title>n24:e&#45;&gt;p6:w</title>
+<path fill="none" stroke="#1b9e77" d="M301.76,-356.5C325.63,-356.5 330.28,-345.28 348.2,-329.5 376,-305.01 366.24,-265.12 393.51,-256.98"/>
+<polygon fill="#1b9e77" stroke="#1b9e77" points="393.86,-260.46 403.33,-255.7 392.96,-253.52 393.86,-260.46"/>
+</g>
+<!-- v0 -->
+<g id="node13" class="node">
+<title>v0</title>
+<ellipse fill="none" stroke="black" cx="455.83" cy="-621.5" rx="27" ry="18"/>
+<text text-anchor="middle" x="455.83" y="-616.45" font-family="Times,serif" font-size="14.00">1</text>
+</g>
+<!-- c29 -->
+<g id="node15" class="node">
+<title>c29</title>
+<polygon fill="none" stroke="black" points="598.15,-584.75 598.15,-658.25 697.15,-658.25 697.15,-584.75 598.15,-584.75"/>
+<text text-anchor="middle" x="611.03" y="-640.95" font-family="Times,serif" font-size="14.00">A</text>
+<polyline fill="none" stroke="black" points="598.15,-633.75 623.9,-633.75"/>
+<text text-anchor="middle" x="611.03" y="-616.45" font-family="Times,serif" font-size="14.00">B</text>
+<polyline fill="none" stroke="black" points="598.15,-609.25 623.9,-609.25"/>
+<text text-anchor="middle" x="611.03" y="-591.95" font-family="Times,serif" font-size="14.00">S</text>
+<polyline fill="none" stroke="black" points="623.9,-584.75 623.9,-658.25"/>
+<text text-anchor="middle" x="647.65" y="-624.7" font-family="Times,serif" font-size="14.00">$6</text>
+<text text-anchor="middle" x="647.65" y="-608.2" font-family="Times,serif" font-size="14.00">$mux</text>
+<polyline fill="none" stroke="black" points="671.4,-584.75 671.4,-658.25"/>
+<text text-anchor="middle" x="684.28" y="-616.45" font-family="Times,serif" font-size="14.00">Y</text>
+</g>
+<!-- v0&#45;&gt;c29 -->
+<g id="edge36" class="edge">
+<title>v0:e&#45;&gt;c29:w</title>
+<path fill="none" stroke="#66a61e" stroke-width="3" d="M484.08,-621.5C530.31,-621.5 544.65,-621.5 585.77,-621.5"/>
+<polygon fill="#66a61e" stroke="#66a61e" stroke-width="3" points="582.61,-625 592.61,-621.5 582.61,-618 582.61,-625"/>
+</g>
+<!-- v1 -->
+<g id="node14" class="node">
+<title>v1</title>
+<ellipse fill="none" stroke="black" cx="455.83" cy="-675.5" rx="27" ry="18"/>
+<text text-anchor="middle" x="455.83" y="-670.45" font-family="Times,serif" font-size="14.00">0</text>
+</g>
+<!-- v1&#45;&gt;c29 -->
+<g id="edge37" class="edge">
+<title>v1:e&#45;&gt;c29:w</title>
+<path fill="none" stroke="#a6761d" stroke-width="3" d="M484.08,-675.5C531.96,-675.5 543.52,-650.43 585.72,-646.51"/>
+<polygon fill="#a6761d" stroke="#a6761d" stroke-width="3" points="582.78,-650.15 592.62,-646.2 582.47,-643.15 582.78,-650.15"/>
+</g>
+<!-- x7 -->
+<g id="node27" class="node">
+<title>x7</title>
+<path fill="none" stroke="#666666" d="M810.86,-603.5C810.86,-603.5 849.36,-603.5 849.36,-603.5 855.36,-603.5 861.36,-609.5 861.36,-615.5 861.36,-615.5 861.36,-627.5 861.36,-627.5 861.36,-633.5 855.36,-639.5 849.36,-639.5 849.36,-639.5 810.86,-639.5 810.86,-639.5 804.86,-639.5 798.86,-633.5 798.86,-627.5 798.86,-627.5 798.86,-615.5 798.86,-615.5 798.86,-609.5 804.86,-603.5 810.86,-603.5"/>
+<text text-anchor="middle" x="830.11" y="-616.7" font-family="Times,serif" font-size="14.00" fill="#666666">0:0 &#45; 0:0</text>
+</g>
+<!-- c29&#45;&gt;x7 -->
+<g id="edge31" class="edge">
+<title>c29:e&#45;&gt;x7:w</title>
+<path fill="none" stroke="#a6761d" stroke-width="3" d="M698.15,-621.5C738.49,-621.5 751.29,-621.71 786.67,-621.74"/>
+<polygon fill="#a6761d" stroke="#a6761d" stroke-width="3" points="783.31,-625.24 793.32,-621.75 783.32,-618.24 783.31,-625.24"/>
+</g>
+<!-- c30&#45;&gt;c29 -->
+<g id="edge32" class="edge">
+<title>c30:e&#45;&gt;c29:w</title>
+<path fill="none" stroke="#7570b3" d="M500.33,-560.75C542.15,-560.75 549.99,-590.78 585.7,-596.17"/>
+<polygon fill="#7570b3" stroke="#7570b3" points="585.42,-599.66 595.64,-596.89 585.92,-592.68 585.42,-599.66"/>
+</g>
+<!-- c40&#45;&gt;p6 -->
+<g id="edge33" class="edge">
+<title>c40:e&#45;&gt;p6:w</title>
+<path fill="none" stroke="#a6761d" d="M313.87,-141.75C374.43,-141.75 344.63,-241.31 393.54,-254.14"/>
+<polygon fill="#a6761d" stroke="#a6761d" points="392.98,-257.6 403.32,-255.32 393.81,-250.65 392.98,-257.6"/>
+</g>
+<!-- c41&#45;&gt;p6 -->
+<g id="edge34" class="edge">
+<title>c41:e&#45;&gt;p6:w</title>
+<path fill="none" stroke="#e6ab02" d="M313.87,-201.75C356.79,-201.75 358.01,-246.66 393.76,-254.38"/>
+<polygon fill="#e6ab02" stroke="#e6ab02" points="393.02,-257.82 403.32,-255.35 393.73,-250.86 393.02,-257.82"/>
+</g>
+<!-- c42&#45;&gt;p6 -->
+<g id="edge35" class="edge">
+<title>c42:e&#45;&gt;p6:w</title>
+<path fill="none" stroke="#1b9e77" d="M313.87,-299.75C354.79,-299.75 359.33,-263.09 393.71,-256.51"/>
+<polygon fill="#1b9e77" stroke="#1b9e77" points="393.68,-260.02 403.32,-255.64 393.04,-253.05 393.68,-260.02"/>
+</g>
+<!-- p2 -->
+<g id="node22" class="node">
+<title>p2</title>
+<path fill="none" stroke="black" d="M500.58,-335C500.58,-335 411.08,-335 411.08,-335 405.08,-335 399.08,-329 399.08,-323 399.08,-323 399.08,-306 399.08,-306 399.08,-300 405.08,-294 411.08,-294 411.08,-294 500.58,-294 500.58,-294 506.58,-294 512.58,-300 512.58,-306 512.58,-306 512.58,-323 512.58,-323 512.58,-329 506.58,-335 500.58,-335"/>
+<text text-anchor="middle" x="455.83" y="-317.7" font-family="Times,serif" font-size="14.00">PROC $10</text>
+<text text-anchor="middle" x="455.83" y="-301.2" font-family="Times,serif" font-size="14.00">top.v:28.15&#45;28.35</text>
+</g>
+<!-- p2&#45;&gt;n15 -->
+<g id="edge7" class="edge">
+<title>p2:e&#45;&gt;n15:w</title>
+<path fill="none" stroke="#7570b3" stroke-width="3" d="M513.58,-314.5C553.03,-314.5 561.25,-288.22 594.84,-283.29"/>
+<polygon fill="#7570b3" stroke="#7570b3" stroke-width="3" points="591.88,-287.01 601.61,-282.82 591.39,-280.02 591.88,-287.01"/>
+</g>
+<!-- p3 -->
+<g id="node23" class="node">
+<title>p3</title>
+<path fill="none" stroke="black" d="M102.9,-577C102.9,-577 13.4,-577 13.4,-577 7.4,-577 1.4,-571 1.4,-565 1.4,-565 1.4,-548 1.4,-548 1.4,-542 7.4,-536 13.4,-536 13.4,-536 102.9,-536 102.9,-536 108.9,-536 114.9,-542 114.9,-548 114.9,-548 114.9,-565 114.9,-565 114.9,-571 108.9,-577 102.9,-577"/>
+<text text-anchor="middle" x="58.15" y="-559.7" font-family="Times,serif" font-size="14.00">PROC $9</text>
+<text text-anchor="middle" x="58.15" y="-543.2" font-family="Times,serif" font-size="14.00">top.v:19.15&#45;19.31</text>
+</g>
+<!-- p3&#45;&gt;n16 -->
+<g id="edge10" class="edge">
+<title>p3:e&#45;&gt;n16:w</title>
+<path fill="none" stroke="#d95f02" stroke-width="3" d="M115.9,-556.5C146.16,-556.5 156.47,-556.5 181.9,-556.5"/>
+<polygon fill="#d95f02" stroke="#d95f02" stroke-width="3" points="178.82,-560 188.82,-556.5 178.82,-553 178.82,-560"/>
+</g>
+<!-- p4 -->
+<g id="node24" class="node">
+<title>p4</title>
+<path fill="none" stroke="black" d="M500.58,-217C500.58,-217 411.08,-217 411.08,-217 405.08,-217 399.08,-211 399.08,-205 399.08,-205 399.08,-188 399.08,-188 399.08,-182 405.08,-176 411.08,-176 411.08,-176 500.58,-176 500.58,-176 506.58,-176 512.58,-182 512.58,-188 512.58,-188 512.58,-205 512.58,-205 512.58,-211 506.58,-217 500.58,-217"/>
+<text text-anchor="middle" x="455.83" y="-199.7" font-family="Times,serif" font-size="14.00">PROC $8</text>
+<text text-anchor="middle" x="455.83" y="-183.2" font-family="Times,serif" font-size="14.00">top.v:15.15&#45;15.34</text>
+</g>
+<!-- p4&#45;&gt;n18 -->
+<g id="edge15" class="edge">
+<title>p4:e&#45;&gt;n18:w</title>
+<path fill="none" stroke="#1b9e77" stroke-width="3" d="M513.58,-196.5C535.59,-196.5 537.25,-218.86 552.58,-226.2"/>
+<polygon fill="#1b9e77" stroke="#1b9e77" stroke-width="3" points="548.5,-228.91 559.01,-227.56 549.95,-222.06 548.5,-228.91"/>
+</g>
+<!-- p5 -->
+<g id="node25" class="node">
+<title>p5</title>
+<path fill="none" stroke="black" d="M497.2,-158C497.2,-158 414.45,-158 414.45,-158 408.45,-158 402.45,-152 402.45,-146 402.45,-146 402.45,-129 402.45,-129 402.45,-123 408.45,-117 414.45,-117 414.45,-117 497.2,-117 497.2,-117 503.2,-117 509.2,-123 509.2,-129 509.2,-129 509.2,-146 509.2,-146 509.2,-152 503.2,-158 497.2,-158"/>
+<text text-anchor="middle" x="455.83" y="-140.7" font-family="Times,serif" font-size="14.00">PROC $7</text>
+<text text-anchor="middle" x="455.83" y="-124.2" font-family="Times,serif" font-size="14.00">top.v:13.9&#45;13.24</text>
+</g>
+<!-- p5&#45;&gt;n19 -->
+<g id="edge19" class="edge">
+<title>p5:e&#45;&gt;n19:w</title>
+<path fill="none" stroke="#e6ab02" d="M510.2,-137.5C545.45,-137.5 550.58,-167.11 579.47,-173.35"/>
+<polygon fill="#e6ab02" stroke="#e6ab02" points="578.96,-176.82 589.26,-174.35 579.67,-169.85 578.96,-176.82"/>
+</g>
+<!-- p6&#45;&gt;n15 -->
+<g id="edge8" class="edge">
+<title>p6:e&#45;&gt;n15:w</title>
+<path fill="none" stroke="#7570b3" stroke-width="3" d="M506.83,-255.5C548.46,-255.5 558.69,-277.87 594.68,-281.89"/>
+<polygon fill="#7570b3" stroke="#7570b3" stroke-width="3" points="591.44,-285.22 601.61,-282.26 591.81,-278.23 591.44,-285.22"/>
+</g>
+<!-- p6&#45;&gt;n18 -->
+<g id="edge16" class="edge">
+<title>p6:e&#45;&gt;n18:w</title>
+<path fill="none" stroke="#1b9e77" stroke-width="3" d="M506.83,-255.5C530.35,-255.5 534.64,-236.28 552.16,-230.27"/>
+<polygon fill="#1b9e77" stroke="#1b9e77" stroke-width="3" points="549.63,-234.21 558.97,-229.2 548.54,-227.3 549.63,-234.21"/>
+</g>
+<!-- p6&#45;&gt;n19 -->
+<g id="edge20" class="edge">
+<title>p6:e&#45;&gt;n19:w</title>
+<path fill="none" stroke="#e6ab02" d="M506.83,-255.5C554.42,-255.5 541.68,-187.24 579.38,-176.05"/>
+<polygon fill="#e6ab02" stroke="#e6ab02" points="579.83,-179.52 589.27,-174.7 578.89,-172.58 579.83,-179.52"/>
+</g>
+<!-- x7&#45;&gt;n21 -->
+<g id="edge24" class="edge">
+<title>x7:e&#45;&gt;n21:w</title>
+<path fill="none" stroke="#d95f02" d="M862.36,-621.5C887.45,-621.5 896.44,-621.5 916.88,-621.5"/>
+<polygon fill="#d95f02" stroke="#d95f02" points="916.84,-625 926.84,-621.5 916.84,-618 916.84,-625"/>
+</g>
+<!-- x8&#45;&gt;n20 -->
+<g id="edge23" class="edge">
+<title>x8:e&#45;&gt;n20:w</title>
+<path fill="none" stroke="#d95f02" d="M1040.34,-621.5C1051.72,-621.5 1057.03,-621.5 1064.9,-621.5"/>
+<polygon fill="#d95f02" stroke="#d95f02" points="1064.83,-625 1074.83,-621.5 1064.83,-618 1064.83,-625"/>
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-- 
cgit v1.3