Fix Arduino Due post, ol list css.

12 files changed, 73 insertions, 112 deletions

diff --git a/_log/arduino-due.md b/_log/arduino-due.md
index a0bfe4a..e24666c 100644
--- a/_log/arduino-due.md
+++ b/_log/arduino-due.md
@@ -1,17 +1,24 @@
 ---
-title: Bare-metal ATSAM3X8E
+title: ATSAM3X8E bare-metal notes
 date: 2024-09-16
 layout: post
 ---
 
-Notes on programming bare-metal ATSAM3X8E chips (Arduino Due) using Serial Wire
-Debug (SwD) protocol.
+Bypassing ATSAM3X8E (Due) bootloader via Serial Wire Debug (SWD). 
 
-## Toolchain
+Toolchain: ST-LINK/V2 programmer, OpenOCD, ARM GNU Compiler Toolchain.
 
-ST-LINK/V2 programmer, OpenOCD, ARM GNU Compiler Toolchain.
+ARM chips boot into 0x00000. GPNVM bits map one of ROM, flash0, flash1 to
+0x00000: 
 
-## Electrical connections
+ - GPNVM1=0 → ROM (default).
+ - GPNVM1=1 and GPNVM2=0 → flash0.
+ - GPNVM1=1 and GPNVM2=1 → flash1.
+
+By default, control jumps to Atmel's SAM-BA bootloader in ROM. To bypass, set
+GPNVM1=1 and place vector table at 0x80000 (flash0).
+
+Connect ST-LINK/v2 to Arduino Due's DEBUG port:
 
 <table style="border: none; width: 100%;">
   <tr style="border: none;">
@@ -26,22 +33,7 @@ ST-LINK/V2 programmer, OpenOCD, ARM GNU Compiler Toolchain.
   </tr>
 </table>
 
-Arduino Due exposes the ATSAM3X8E's SWD interface via its DEBUG port. The
-ST-LINK/v2 programmer connects to that to communicate with the chip.
-
-## Upload procedure
-
-Build. Magic is in the script.ld linker script.
-
-```
-$ arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -T script.ld \
-    -nostartfiles \
-    -nostdlib \
-    -o a.elf main.c
-```
-
-
-Upload using OpenOCD:
+Remap memory:
 
 ```
 $ openocd -f openocd-due.cfg
@@ -50,35 +42,19 @@ $ telnet localhost 4444
   > at91sam3 gpnvm show
   > at91sam3 gpnvm set 1
   > at91sam3 gpnvm show
-$ openocd -f openocd-due.cfg -c "program a.elf verify reset exit"
 ```
 
-First command starts OpenOCD. Telnet session halts chip, checks GPNVM bit. If
-unset (returns 0), set to 1 and verify. Final command uploads program. See
-OpenOCD manual AT91SAM3 flash driver section for full command list.
+Full command list is in OpenOCD manual AT91SAM3 (flash driver section).
 
-## GPNVM bits
+Compile and upload program:
 
-ARM chips boot into address 0x00000. ATSAM3X8E has ROM and dual-banked flash
-(flash0/flash1) at different addresses. GPNVM bits control which maps to
-0x00000.
-
-GPNVM1 cleared (default): boots from ROM (Atmel SAM-BA bootloader). GPNVM1=1,
-GPNVM2=0: flash0 (0x80000) maps to 0x00000. Both cleared: flash1 maps to
-0x00000.
-
-Program goes in flash0, so set GPNVM1=1 to boot our code instead of bootloader.
-
-## Linker script notes
-
-Vector table must be at first flash address--required for ARM chips unless
-relocated using VTOR register.
-
-First vector table entry: stack pointer. Initialize to highest memory location
-(ATSAM3X8E has descending stack).
-
-Second entry: reset vector. Place initialization code here (zero memory, set
-registers) before jumping to main().
+```
+$ arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -T script.ld \
+    -nostartfiles \
+    -nostdlib \
+    -o a.elf main.c
+$ openocd -f openocd-due.cfg -c "program a.elf verify reset exit"
+```
 
 Commit:
 [3184969](https://git.asciimx.com/bare-metal-arduino-due/commit/?id=318496925ca76668dd9d63c3d060376f489276f8)
diff --git a/_log/e-reader.md b/_log/e-reader.md
index 87417f7..69b1e96 100644
--- a/_log/e-reader.md
+++ b/_log/e-reader.md
@@ -1,5 +1,5 @@
 ---
-title: ESP32 prototype e-reader 
+title: 512 KB e-reader
 date: 2023-10-24
 layout: post
 project: true
@@ -15,9 +15,10 @@ First project with e-paper displays and ESP32.
 ESP-WROOM-32, 7.5" Waveshare e-paper display, three-button interface
 (prev/next/sleep).
 
-Memory: 512KB SRAM + 4MB flash--insufficient for local library. Streams via
-HTTP Range requests over WiFi. Reading progress saved to RTC memory; persists
-through deep sleep.
+Memory: 512KB SRAM + 4MB flash. Internal 4 MB flash unsuitable for storing
+books due to P/E cycle limits. HTTP Range requests for on-demand bitmap
+streaming. Progress saved to RTC memory to survive deep sleep without flash
+wear.
 
 EBM format: Raw bitmap sequence. 1 byte = 8 pixels, 1 page = 48 KB (display
 resolution), headerless. Optimized for HTTP Range requests:
diff --git a/_log/neo4j-a-star-search.md b/_log/neo4j-a-star-search.md
index fe6f33f..de0ef25 100644
--- a/_log/neo4j-a-star-search.md
+++ b/_log/neo4j-a-star-search.md
@@ -1,5 +1,5 @@
 ---
-title: Neo4j shortest path optimization
+title: 'Neo4J path traversal: A* optimization'
 date: 2018-03-06
 layout: post
 ---
diff --git a/_site/assets/css/skeleton.css b/_site/assets/css/skeleton.css
index 90239a6..87b0050 100644
--- a/_site/assets/css/skeleton.css
+++ b/_site/assets/css/skeleton.css
@@ -291,6 +291,8 @@ ol ul {
 li {
   margin-bottom: 0.6rem; }
 
+ol {
+  margin-left: 1.8em; }
 
 /* Code
 –––––––––––––––––––––––––––––––––––––––––––––––––– */
diff --git a/_site/feed.xml b/_site/feed.xml
index 50fefd9..5d9d93f 100644
--- a/_site/feed.xml
+++ b/_site/feed.xml
@@ -1 +1 @@
-<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="4.4.1">Jekyll</generator><link href="http://localhost:4000/feed.xml" rel="self" type="application/atom+xml" /><link href="http://localhost:4000/" rel="alternate" type="text/html" /><updated>2026-01-05T16:42:22+08:00</updated><id>http://localhost:4000/feed.xml</id><title type="html">ASCIIMX | Log</title><author><name>W. D. Sadeep Madurange</name></author><entry><title type="html">Search engine (Perl + FastCGI + SA)</title><link href="http://localhost:4000/log/site-search/" rel="alternate" type="text/html" title="Search engine (Perl + FastCGI + SA)" /><published>2026-01-03T00:00:00+08:00</published><updated>2026-01-03T00:00:00+08:00</updated><id>http://localhost:4000/log/site-search</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Article count on the website is growing. Need a way to search.]]></summary></entry><entry><title type="html">Matrix Rain: 2025 refactor</title><link href="http://localhost:4000/log/matrix-digital-rain/" rel="alternate" type="text/html" title="Matrix Rain: 2025 refactor" /><published>2025-12-21T00:00:00+08:00</published><updated>2025-12-21T00:00:00+08:00</updated><id>http://localhost:4000/log/matrix-digital-rain</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[The 2022 version worked but had some loose ends. Unicode support was inflexible–couldn’t mix ASCII with Katakana; Phosphor decay was stored in a separate array when it should’ve been packed with RGB; Code was harder to read than it needed to be.]]></summary></entry><entry><title type="html">Fingerprint door lock (LP)</title><link href="http://localhost:4000/log/fpm-door-lock-lp/" rel="alternate" type="text/html" title="Fingerprint door lock (LP)" /><published>2025-08-18T00:00:00+08:00</published><updated>2025-08-18T00:00:00+08:00</updated><id>http://localhost:4000/log/fpm-door-lock-lp</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Second iteration of the RF door lock. Old version worked but drew too much quiescent current. Sensor and servo pulled 13.8mA and 4.6mA idle. Linear regulators were a disaster. Battery didn’t last 24 hours.]]></summary></entry><entry><title type="html">High-side MOSFET switching</title><link href="http://localhost:4000/log/mosfet-switches/" rel="alternate" type="text/html" title="High-side MOSFET switching" /><published>2025-06-22T00:00:00+08:00</published><updated>2025-06-22T00:00:00+08:00</updated><id>http://localhost:4000/log/mosfet-switches</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Needed low-power switching for the fingerprint door lock. Servo and FPM draw high quiescent current–had to cut power electronically during sleep. MOSFETs can do this.]]></summary></entry><entry><title type="html">ATmega328P at 3.3V and 5V</title><link href="http://localhost:4000/log/arduino-uno/" rel="alternate" type="text/html" title="ATmega328P at 3.3V and 5V" /><published>2025-06-10T00:00:00+08:00</published><updated>2025-06-10T00:00:00+08:00</updated><id>http://localhost:4000/log/arduino-uno</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Quick reference for wiring ATmega328P ICs at 5V and 3.3V. 5V uses 16MHz crystal, 3.3V uses 8MHz.]]></summary></entry><entry><title type="html">Fingerprint door lock (RF)</title><link href="http://localhost:4000/log/fpm-door-lock-rf/" rel="alternate" type="text/html" title="Fingerprint door lock (RF)" /><published>2025-06-05T00:00:00+08:00</published><updated>2025-06-05T00:00:00+08:00</updated><id>http://localhost:4000/log/fpm-door-lock-rf</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Wanted to unlock door with fingerprint, wirelessly to avoid drilling.]]></summary></entry><entry><title type="html">Bumblebee: browser automation</title><link href="http://localhost:4000/log/bumblebee/" rel="alternate" type="text/html" title="Bumblebee: browser automation" /><published>2025-04-02T00:00:00+08:00</published><updated>2025-04-02T00:00:00+08:00</updated><id>http://localhost:4000/log/bumblebee</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Built with Andy Zhang for an employer. Tool to automate web scraping script generation.]]></summary></entry><entry><title type="html">Bare-metal ATSAM3X8E</title><link href="http://localhost:4000/log/arduino-due/" rel="alternate" type="text/html" title="Bare-metal ATSAM3X8E" /><published>2024-09-16T00:00:00+08:00</published><updated>2024-09-16T00:00:00+08:00</updated><id>http://localhost:4000/log/arduino-due</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Notes on programming bare-metal ATSAM3X8E chips (Arduino Due) using Serial Wire Debug (SwD) protocol.]]></summary></entry><entry><title type="html">Etlas: e-paper dashboard</title><link href="http://localhost:4000/log/etlas/" rel="alternate" type="text/html" title="Etlas: e-paper dashboard" /><published>2024-09-05T00:00:00+08:00</published><updated>2024-09-05T00:00:00+08:00</updated><id>http://localhost:4000/log/etlas</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Repurposed e-reader prototype into something for regular use. News, stocks, weather dashboard. ESP32 NodeMCU D1 + 7.5” Waveshare e-paper + DHT22 sensor.]]></summary></entry><entry><title type="html">ESP32 prototype e-reader</title><link href="http://localhost:4000/log/e-reader/" rel="alternate" type="text/html" title="ESP32 prototype e-reader" /><published>2023-10-24T00:00:00+08:00</published><updated>2023-10-24T00:00:00+08:00</updated><id>http://localhost:4000/log/e-reader</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[First project with e-paper displays and ESP32.]]></summary></entry></feed>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="4.4.1">Jekyll</generator><link href="http://localhost:4000/feed.xml" rel="self" type="application/atom+xml" /><link href="http://localhost:4000/" rel="alternate" type="text/html" /><updated>2026-01-05T18:48:39+08:00</updated><id>http://localhost:4000/feed.xml</id><title type="html">ASCIIMX | Log</title><author><name>W. D. Sadeep Madurange</name></author><entry><title type="html">Search engine (Perl + FastCGI + SA)</title><link href="http://localhost:4000/log/site-search/" rel="alternate" type="text/html" title="Search engine (Perl + FastCGI + SA)" /><published>2026-01-03T00:00:00+08:00</published><updated>2026-01-03T00:00:00+08:00</updated><id>http://localhost:4000/log/site-search</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Article count on the website is growing. Need a way to search.]]></summary></entry><entry><title type="html">Matrix Rain: 2025 refactor</title><link href="http://localhost:4000/log/matrix-digital-rain/" rel="alternate" type="text/html" title="Matrix Rain: 2025 refactor" /><published>2025-12-21T00:00:00+08:00</published><updated>2025-12-21T00:00:00+08:00</updated><id>http://localhost:4000/log/matrix-digital-rain</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[The 2022 version worked but had some loose ends. Unicode support was inflexible–couldn’t mix ASCII with Katakana; Phosphor decay was stored in a separate array when it should’ve been packed with RGB; Code was harder to read than it needed to be.]]></summary></entry><entry><title type="html">Fingerprint door lock (LP)</title><link href="http://localhost:4000/log/fpm-door-lock-lp/" rel="alternate" type="text/html" title="Fingerprint door lock (LP)" /><published>2025-08-18T00:00:00+08:00</published><updated>2025-08-18T00:00:00+08:00</updated><id>http://localhost:4000/log/fpm-door-lock-lp</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Second iteration of the RF door lock. Old version worked but drew too much quiescent current. Sensor and servo pulled 13.8mA and 4.6mA idle. Linear regulators were a disaster. Battery didn’t last 24 hours.]]></summary></entry><entry><title type="html">High-side MOSFET switching</title><link href="http://localhost:4000/log/mosfet-switches/" rel="alternate" type="text/html" title="High-side MOSFET switching" /><published>2025-06-22T00:00:00+08:00</published><updated>2025-06-22T00:00:00+08:00</updated><id>http://localhost:4000/log/mosfet-switches</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Needed low-power switching for the fingerprint door lock. Servo and FPM draw high quiescent current–had to cut power electronically during sleep. MOSFETs can do this.]]></summary></entry><entry><title type="html">ATmega328P at 3.3V and 5V</title><link href="http://localhost:4000/log/arduino-uno/" rel="alternate" type="text/html" title="ATmega328P at 3.3V and 5V" /><published>2025-06-10T00:00:00+08:00</published><updated>2025-06-10T00:00:00+08:00</updated><id>http://localhost:4000/log/arduino-uno</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Quick reference for wiring ATmega328P ICs at 5V and 3.3V. 5V uses 16MHz crystal, 3.3V uses 8MHz.]]></summary></entry><entry><title type="html">Fingerprint door lock (RF)</title><link href="http://localhost:4000/log/fpm-door-lock-rf/" rel="alternate" type="text/html" title="Fingerprint door lock (RF)" /><published>2025-06-05T00:00:00+08:00</published><updated>2025-06-05T00:00:00+08:00</updated><id>http://localhost:4000/log/fpm-door-lock-rf</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Wanted to unlock door with fingerprint, wirelessly to avoid drilling.]]></summary></entry><entry><title type="html">Bumblebee: browser automation</title><link href="http://localhost:4000/log/bumblebee/" rel="alternate" type="text/html" title="Bumblebee: browser automation" /><published>2025-04-02T00:00:00+08:00</published><updated>2025-04-02T00:00:00+08:00</updated><id>http://localhost:4000/log/bumblebee</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Built with Andy Zhang for an employer. Tool to automate web scraping script generation.]]></summary></entry><entry><title type="html">ATSAM3X8E bare-metal notes</title><link href="http://localhost:4000/log/arduino-due/" rel="alternate" type="text/html" title="ATSAM3X8E bare-metal notes" /><published>2024-09-16T00:00:00+08:00</published><updated>2024-09-16T00:00:00+08:00</updated><id>http://localhost:4000/log/arduino-due</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Bypassing ATSAM3X8E (Due) bootloader via Serial Wire Debug (SWD).]]></summary></entry><entry><title type="html">Etlas: e-paper dashboard</title><link href="http://localhost:4000/log/etlas/" rel="alternate" type="text/html" title="Etlas: e-paper dashboard" /><published>2024-09-05T00:00:00+08:00</published><updated>2024-09-05T00:00:00+08:00</updated><id>http://localhost:4000/log/etlas</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[Repurposed e-reader prototype into something for regular use. News, stocks, weather dashboard. ESP32 NodeMCU D1 + 7.5” Waveshare e-paper + DHT22 sensor.]]></summary></entry><entry><title type="html">512 KB e-reader</title><link href="http://localhost:4000/log/e-reader/" rel="alternate" type="text/html" title="512 KB e-reader" /><published>2023-10-24T00:00:00+08:00</published><updated>2023-10-24T00:00:00+08:00</updated><id>http://localhost:4000/log/e-reader</id><author><name>W. D. Sadeep Madurange</name></author><summary type="html"><![CDATA[First project with e-paper displays and ESP32.]]></summary></entry></feed>
\ No newline at end of file
diff --git a/_site/index.html b/_site/index.html
index cce84be..5b62029 100644
--- a/_site/index.html
+++ b/_site/index.html
@@ -149,7 +149,7 @@
   
       <tr>
         <td class="posts-td posts-td-link">
-          <a href="/log/arduino-due/" class="link-decor-none">Bare-metal ATSAM3X8E</a>
+          <a href="/log/arduino-due/" class="link-decor-none">ATSAM3X8E bare-metal notes</a>
         </td>
         <td class="posts-td posts-td-time">
           <span class="post-meta">
@@ -175,7 +175,7 @@
   
       <tr>
         <td class="posts-td posts-td-link">
-          <a href="/log/e-reader/" class="link-decor-none">ESP32 prototype e-reader</a>
+          <a href="/log/e-reader/" class="link-decor-none">512 KB e-reader</a>
         </td>
         <td class="posts-td posts-td-time">
           <span class="post-meta">
@@ -188,7 +188,7 @@
   
       <tr>
         <td class="posts-td posts-td-link">
-          <a href="/log/neo4j-a-star-search/" class="link-decor-none">Neo4j shortest path optimization</a>
+          <a href="/log/neo4j-a-star-search/" class="link-decor-none">Neo4J path traversal: A* optimization</a>
         </td>
         <td class="posts-td posts-td-time">
           <span class="post-meta">
diff --git a/_site/log/arduino-due/index.html b/_site/log/arduino-due/index.html
index d9cc946..ed49e78 100644
--- a/_site/log/arduino-due/index.html
+++ b/_site/log/arduino-due/index.html
@@ -3,7 +3,7 @@
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>Bare-metal ATSAM3X8E</title>
+  <title>ATSAM3X8E bare-metal notes</title>
   <link rel="stylesheet" href="/assets/css/main.css">
   <link rel="stylesheet" href="/assets/css/skeleton.css">
 </head>
@@ -37,17 +37,26 @@
     <main>
       <div class="container">
         <div class="container-2">
-          <h2 class="center" id="title">BARE-METAL ATSAM3X8E</h2>
+          <h2 class="center" id="title">ATSAM3X8E BARE-METAL NOTES</h2>
           <h5 class="center">16 SEPTEMBER 2024</h5>
           <br>
-          <div class="twocol justify"><p>Notes on programming bare-metal ATSAM3X8E chips (Arduino Due) using Serial Wire
-Debug (SwD) protocol.</p>
+          <div class="twocol justify"><p>Bypassing ATSAM3X8E (Due) bootloader via Serial Wire Debug (SWD).</p>
 
-<h2 id="toolchain">Toolchain</h2>
+<p>Toolchain: ST-LINK/V2 programmer, OpenOCD, ARM GNU Compiler Toolchain.</p>
 
-<p>ST-LINK/V2 programmer, OpenOCD, ARM GNU Compiler Toolchain.</p>
+<p>ARM chips boot into 0x00000. GPNVM bits map one of ROM, flash0, flash1 to
+0x00000:</p>
 
-<h2 id="electrical-connections">Electrical connections</h2>
+<ul>
+  <li>GPNVM1=0 → ROM (default).</li>
+  <li>GPNVM1=1 and GPNVM2=0 → flash0.</li>
+  <li>GPNVM1=1 and GPNVM2=1 → flash1.</li>
+</ul>
+
+<p>By default, control jumps to Atmel’s SAM-BA bootloader in ROM. To bypass, set
+GPNVM1=1 and place vector table at 0x80000 (flash0).</p>
+
+<p>Connect ST-LINK/v2 to Arduino Due’s DEBUG port:</p>
 
 <table style="border: none; width: 100%;">
   <tr style="border: none;">
@@ -62,20 +71,7 @@ Debug (SwD) protocol.</p>
   </tr>
 </table>
 
-<p>Arduino Due exposes the ATSAM3X8E’s SWD interface via its DEBUG port. The
-ST-LINK/v2 programmer connects to that to communicate with the chip.</p>
-
-<h2 id="upload-procedure">Upload procedure</h2>
-
-<p>Build. Magic is in the script.ld linker script.</p>
-
-<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>$ arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -T script.ld \
-    -nostartfiles \
-    -nostdlib \
-    -o a.elf main.c
-</code></pre></div></div>
-
-<p>Upload using OpenOCD:</p>
+<p>Remap memory:</p>
 
 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>$ openocd -f openocd-due.cfg
 $ telnet localhost 4444
@@ -83,35 +79,18 @@ $ telnet localhost 4444
   &gt; at91sam3 gpnvm show
   &gt; at91sam3 gpnvm set 1
   &gt; at91sam3 gpnvm show
-$ openocd -f openocd-due.cfg -c "program a.elf verify reset exit"
 </code></pre></div></div>
 
-<p>First command starts OpenOCD. Telnet session halts chip, checks GPNVM bit. If
-unset (returns 0), set to 1 and verify. Final command uploads program. See
-OpenOCD manual AT91SAM3 flash driver section for full command list.</p>
+<p>Full command list is in OpenOCD manual AT91SAM3 (flash driver section).</p>
 
-<h2 id="gpnvm-bits">GPNVM bits</h2>
+<p>Compile and upload program:</p>
 
-<p>ARM chips boot into address 0x00000. ATSAM3X8E has ROM and dual-banked flash
-(flash0/flash1) at different addresses. GPNVM bits control which maps to
-0x00000.</p>
-
-<p>GPNVM1 cleared (default): boots from ROM (Atmel SAM-BA bootloader). GPNVM1=1,
-GPNVM2=0: flash0 (0x80000) maps to 0x00000. Both cleared: flash1 maps to
-0x00000.</p>
-
-<p>Program goes in flash0, so set GPNVM1=1 to boot our code instead of bootloader.</p>
-
-<h2 id="linker-script-notes">Linker script notes</h2>
-
-<p>Vector table must be at first flash address–required for ARM chips unless
-relocated using VTOR register.</p>
-
-<p>First vector table entry: stack pointer. Initialize to highest memory location
-(ATSAM3X8E has descending stack).</p>
-
-<p>Second entry: reset vector. Place initialization code here (zero memory, set
-registers) before jumping to main().</p>
+<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>$ arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -T script.ld \
+    -nostartfiles \
+    -nostdlib \
+    -o a.elf main.c
+$ openocd -f openocd-due.cfg -c "program a.elf verify reset exit"
+</code></pre></div></div>
 
 <p>Commit:
 <a href="https://git.asciimx.com/bare-metal-arduino-due/commit/?id=318496925ca76668dd9d63c3d060376f489276f8">3184969</a></p>
diff --git a/_site/log/e-reader/index.html b/_site/log/e-reader/index.html
index 41f58ff..33c08d2 100644
--- a/_site/log/e-reader/index.html
+++ b/_site/log/e-reader/index.html
@@ -3,7 +3,7 @@
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>ESP32 prototype e-reader</title>
+  <title>512 KB e-reader</title>
   <link rel="stylesheet" href="/assets/css/main.css">
   <link rel="stylesheet" href="/assets/css/skeleton.css">
 </head>
@@ -37,7 +37,7 @@
     <main>
       <div class="container">
         <div class="container-2">
-          <h2 class="center" id="title">ESP32 PROTOTYPE E-READER</h2>
+          <h2 class="center" id="title">512 KB E-READER</h2>
           <h5 class="center">24 OCTOBER 2023</h5>
           <br>
           <div class="twocol justify"><p>First project with e-paper displays and ESP32.</p>
@@ -49,9 +49,10 @@
 <p>ESP-WROOM-32, 7.5” Waveshare e-paper display, three-button interface
 (prev/next/sleep).</p>
 
-<p>Memory: 512KB SRAM + 4MB flash–insufficient for local library. Streams via
-HTTP Range requests over WiFi. Reading progress saved to RTC memory; persists
-through deep sleep.</p>
+<p>Memory: 512KB SRAM + 4MB flash. Internal 4 MB flash unsuitable for storing
+books due to P/E cycle limits. HTTP Range requests for on-demand bitmap
+streaming. Progress saved to RTC memory to survive deep sleep without flash
+wear.</p>
 
 <p>EBM format: Raw bitmap sequence. 1 byte = 8 pixels, 1 page = 48 KB (display
 resolution), headerless. Optimized for HTTP Range requests:</p>
diff --git a/_site/log/neo4j-a-star-search/index.html b/_site/log/neo4j-a-star-search/index.html
index c8c4ce6..152531d 100644
--- a/_site/log/neo4j-a-star-search/index.html
+++ b/_site/log/neo4j-a-star-search/index.html
@@ -3,7 +3,7 @@
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>Neo4j shortest path optimization</title>
+  <title>Neo4J path traversal: A* optimization</title>
   <link rel="stylesheet" href="/assets/css/main.css">
   <link rel="stylesheet" href="/assets/css/skeleton.css">
 </head>
@@ -37,7 +37,7 @@
     <main>
       <div class="container">
         <div class="container-2">
-          <h2 class="center" id="title">NEO4J SHORTEST PATH OPTIMIZATION</h2>
+          <h2 class="center" id="title">NEO4J PATH TRAVERSAL: A* OPTIMIZATION</h2>
           <h5 class="center">06 MARCH 2018</h5>
           <br>
           <div class="twocol justify"><p>Work project. Marine vessel tracking with Neo4J hit a limit. Need to store
diff --git a/_site/posts.xml b/_site/posts.xml
index 75c68d1..2b2377d 100644
--- a/_site/posts.xml
+++ b/_site/posts.xml
@@ -1 +1 @@
-<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="4.4.1">Jekyll</generator><link href="http://localhost:4000/posts.xml" rel="self" type="application/atom+xml" /><link href="http://localhost:4000/" rel="alternate" type="text/html" /><updated>2026-01-05T16:42:22+08:00</updated><id>http://localhost:4000/posts.xml</id><title type="html">ASCIIMX</title><author><name>W. D. Sadeep Madurange</name></author></feed>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="4.4.1">Jekyll</generator><link href="http://localhost:4000/posts.xml" rel="self" type="application/atom+xml" /><link href="http://localhost:4000/" rel="alternate" type="text/html" /><updated>2026-01-05T18:48:39+08:00</updated><id>http://localhost:4000/posts.xml</id><title type="html">ASCIIMX</title><author><name>W. D. Sadeep Madurange</name></author></feed>
\ No newline at end of file
diff --git a/_site/projects/index.html b/_site/projects/index.html
index 6e6c5be..c87b2d7 100644
--- a/_site/projects/index.html
+++ b/_site/projects/index.html
@@ -103,8 +103,8 @@
           <td class="project-item">
             
             <a href="../log/e-reader" class="link-decor-none">
-              <img src="../log/e-reader/thumb_sm.png" alt="ESP32 prototype e-reader">
-              <h5>ESP32 prototype e-reader</h5>
+              <img src="../log/e-reader/thumb_sm.png" alt="512 KB e-reader">
+              <h5>512 KB e-reader</h5>
             </a>
           </td>
       
diff --git a/assets/css/skeleton.css b/assets/css/skeleton.css
index 90239a6..87b0050 100644
--- a/assets/css/skeleton.css
+++ b/assets/css/skeleton.css
@@ -291,6 +291,8 @@ ol ul {
 li {
   margin-bottom: 0.6rem; }
 
+ol {
+  margin-left: 1.8em; }
 
 /* Code
 –––––––––––––––––––––––––––––––––––––––––––––––––– */