編程義敎 ： 仁濟醫院兒童發展基金
今次教導了幾名青少年開始學習編程，教授了一些編程的基礎技術。我們生活在一個數字化的世界，編程已經成為我們日常生活中不可或缺的一部分。無論是手機應用程序，還是我們使用的各種網站，都是由編程語言創建的。學習編程可以開啟一扇通往創新和創造力的大門，讓我們有能力去創建和控制自己的數字世界。 義教編程是一種強大的力量，可以幫助青少年開始這個旅程。感謝仁濟醫院兒童發展基金提供了一個友好和支持的環境，讓你們可以在專業的指導下學習編程。這些義工老師都是經驗豐富的編程專家，他們熱衷於分享他們的知識和經驗，幫助你們建立堅實的編程基礎。 2024 Jul 20
今次教導了幾名青少年開始學習編程，教授了一些編程的基礎技術。我們生活在一個數字化的世界，編程已經成為我們日常生活中不可或缺的一部分。無論是手機應用程序，還是我們使用的各種網站，都是由編程語言創建的。學習編程可以開啟一扇通往創新和創造力的大門，讓我們有能力去創建和控制自己的數字世界。
義教編程是一種強大的力量，可以幫助青少年開始這個旅程。感謝仁濟醫院兒童發展基金提供了一個友好和支持的環境，讓你們可以在專業的指導下學習編程。這些義工老師都是經驗豐富的編程專家，他們熱衷於分享他們的知識和經驗，幫助你們建立堅實的編程基礎。 2024 Jul 20
x86 ASM第2堂
注意，在bochsrcSDL.bxrc不需要這兩句，否則就會做成video framebuffer 0xb8000不能使用 範例代碼 a.asm: bochsrcSDL.bxrc: insertData.sh: 編譯指令
注意，在bochsrcSDL.bxrc不需要這兩句，否則就會做成video framebuffer 0xb8000不能使用
範例代碼
a.asm:
bits 16 %define ONE 1 org 0x7c00 mov ax, 0xb800 mov es, ax mov byte [es:0], 'P' mov byte [es:1], 4 mov byte [es:2], 'e' mov byte [es:3], 3 loop1: jmp loop1 times 512-($-$$)-2 db 0 signature dw 0xaa55
bochsrcSDL.bxrc:
############################################################### # bochsrc.txt file for DLX Linux disk image. ############################################################### # how much memory the emulated machine will have megs: 16 # hard disk ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14 ata0-master: type=disk, path="hd.img", mode=flat, cylinders=40, heads=16, spt=63 # choose the boot disk. boot: c #display_library: term # other choices: win32 sdl wx carbon amigaos beos macintosh nogui rfb term svga display_library: sdl2 # where do we send log messages? log: bochsout.txt # disable the mouse, since DLX is text only mouse: enabled=0 magic_break: enabled=1 #debug: action=report info: action=report error: action=report panic: action=report
insertData.sh:
#!/bin/bash
if [ $# != 4 ]; then
echo "Usage : insertData.sh source dest <source skip position> <dest seek position>"
exit;
fi
source_size=$(ls -l $1 | awk {'print $5'})
#dest_size=$(ls -l $2 | awk {'print $5'})
total_seek_size=$((source_size + $4))
#dd if=$2 of=insertData_temp skip=$total_seek_size ibs=1 obs=1MB > /dev/null
if [ $4 = 0 ]; then
rm -fr first
touch first
else
echo "dd if=$2 of=first bs=$4 count=1";
dd if=$2 of=first bs=$4 count=1
fi
#### back #####
echo "dd if=$2 of=back skip=1 bs=$total_seek_size";
dd if=$2 of=back skip=1 bs=$total_seek_size
cat first $1 back > $2
rm -fr first back
編譯指令
nasm a.asm -l a.lst ./insertData.sh a hd.img 0 0 bochs -f bochsrcSDL.bxrc
x86 ASM第1堂
下載nasm https://www.nasm.us/ 下載bochs https://bochs.sourceforge.io/ , 如果在linux或mac，可以試下自己build Asm例子 a.asm: bochsrcSDL.bxrc: insertData.sh: Compile指令:
下載nasm https://www.nasm.us/
下載bochs https://bochs.sourceforge.io/ , 如果在linux或mac，可以試下自己build
./configure --enable-debugger --enable-debugger-gui --with-sdl2 --with-nogui --with-term make -j make install
Asm例子
a.asm:
org 0x7c00 mov ax,1 mov bx,2 add ax, bx ; ax = ax + bx inc ax sub ax, bx ; ax = ax - bx mov ah, byte [ds:bx] xor ch,ch ; set zero mov byte [ds:bx], ch loop1: jmp loop1 times 512-($-$$)-2 db 0 signature dw 0xaa55
bochsrcSDL.bxrc:
############################################################### # bochsrc.txt file for DLX Linux disk image. ############################################################### # how much memory the emulated machine will have megs: 16 # filename of ROM images romimage: file=$BXSHARE/BIOS-bochs-latest vgaromimage: file=$BXSHARE/VGABIOS-lgpl-latest # what disk images will be used #floppya: 1_44=../bootimage, status=inserted #floppyb: 1_44=floppyb.img, status=inserted # hard disk #ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14 #ata0-master: type=disk, path="hd10meg.img", cylinders=306, heads=4, spt=17 ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14 #ata0-master: type=disk, path="10mb.img", mode=flat, cylinders=20, heads=16, spt=63 ata0-master: type=disk, path="hd.img", mode=flat, cylinders=40, heads=16, spt=63 #ata0-master: type=disk, path="../hd.img", mode=flat, cylinders=203, heads=16, spt=63 # 100MB #ata0-master: type=disk, path="../harddisk", mode=flat, cylinders=2080, heads=16, spt=63 # 1GB # choose the boot disk. boot: c #display_library: term # other choices: win32 sdl wx carbon amigaos beos macintosh nogui rfb term svga display_library: sdl2 # where do we send log messages? log: bochsout.txt # disable the mouse, since DLX is text only mouse: enabled=0 # enable key mapping, using US layout as default. # # NOTE: In Bochs 1.4, keyboard mapping is only 100% implemented on X windows. # However, the key mapping tables are used in the paste function, so # in the DLX Linux example I'm enabling keyboard_mapping so that paste # will work. Cut&Paste is currently implemented on win32 and X windows only. #keyboard_mapping: enabled=1, map=$BXSHARE/keymaps/x11-pc-us.map #keyboard_mapping: enabled=1, map=$BXSHARE/keymaps/x11-pc-fr.map #keyboard_mapping: enabled=1, map=$BXSHARE/keymaps/x11-pc-de.map #keyboard_mapping: enabled=1, map=$BXSHARE/keymaps/x11-pc-es.map magic_break: enabled=1 #debug: action=report info: action=report error: action=report panic: action=report
insertData.sh:
#!/bin/bash
if [ $# != 4 ]; then
echo "Usage : insertData.sh source dest <source skip position> <dest seek position>"
exit;
fi
source_size=$(ls -l $1 | awk {'print $5'})
#dest_size=$(ls -l $2 | awk {'print $5'})
total_seek_size=$((source_size + $4))
#dd if=$2 of=insertData_temp skip=$total_seek_size ibs=1 obs=1MB > /dev/null
if [ $4 = 0 ]; then
rm -fr first
touch first
else
echo "dd if=$2 of=first bs=$4 count=1";
dd if=$2 of=first bs=$4 count=1
fi
#### back #####
echo "dd if=$2 of=back skip=1 bs=$total_seek_size";
dd if=$2 of=back skip=1 bs=$total_seek_size
cat first $1 back > $2
rm -fr first back
Compile指令:
nasm a.asm -l a.lst dd if=/dev/zero of=hd.img count=3072 bs=10240 ./insertData.sh a hd.img 0 0 bochs -q -f bochsrcSDL.bxrc
HKOSCON 2024
Thank you HKOSCON, their Chairman Mr Sammy, and all members for the chance to present there
Thank you HKOSCON, their Chairman Mr Sammy, and all members for the chance to present there
Embedded System Special Interest Group宣布成立
終於找到一位有心人Charles Ng先生帶領大家成立Embedded System Special Interest Group，本會和吳先生承諾呢個SIG會last for最少一年，吳先生會搞兩次workshop，會長亦都會一對一搞另多兩次workshop以作支持。吳先生是業界從事嵌入式開發超過幾十年之專業人士，佢自己實作左塊PCB可以mount raspberry pi cm上去，佢會舉辦workshop教一教大家點做，請大家支持。 吳先生作品
終於找到一位有心人Charles Ng先生帶領大家成立Embedded System Special Interest Group，本會和吳先生承諾呢個SIG會last for最少一年，吳先生會搞兩次workshop，會長亦都會一對一搞另多兩次workshop以作支持。吳先生是業界從事嵌入式開發超過幾十年之專業人士，佢自己實作左塊PCB可以mount raspberry pi cm上去，佢會舉辦workshop教一教大家點做，請大家支持。
吳先生作品
Azure User Group聚會 2024/06/29
Java第6堂: Data Structure & OOP again
Stack例子： LinkedList例子： 注意 ： 如果用VSCode打Code，淺灰式e:只是提示不是真正代碼，不用打去你段Code到
Stack例子：
import java.util.Stack;
public class Example6 {
public static void main(String args[]) {
Stack<String> s = new Stack();
s.add("A");
s.add("B");
s.add("C");
s.remove(1);
System.out.println(s.size());
System.out.println(s.pop());
if (!s.empty()) {
System.out.println(s.pop());
}
System.out.println(s.pop());
if (!s.empty()) {
System.out.println(s.pop());
}
}
}
LinkedList例子：
import java.util.LinkedList;
public class Example6 {
public static void main(String args[]) {
LinkedList<String> list = new LinkedList();
list.add("Peter 1");
list.add("Peter 2");
list.add("Peter 3");
for (int x = 0; x < list.size(); x++) {
System.out.println(list.get(x));
}
}
}
注意 ： 如果用VSCode打Code，淺灰式e:只是提示不是真正代碼，不用打去你段Code到
Java第2堂 : Variable & Loop
練習
練習
public class Example1{
public static void main(String args[]){
int score=55;
if (score >= 80){
System.out.println("A");
}else if (score >= 60){
System.out.println("B");
}else if (score >= 40){
System.out.println("C");
}else{
System.out.println("F");
}
System.out.println("End");
}
}
Java 第1堂
PowerPoint Notes Compile指令 javac Example1.javajava Example1 常見錯誤 錯誤一 : 打錯字 首先打錯字唔洗驚, 睇下個Error Message, 佢會有個箭咀指住大約錯邊個位, 同埋有個行數, 跟住就可以揾到錯邊 錯誤二: Save錯文件名 錯誤張文件名Save做.java.txt, 所有Java文件必需要用.java做尾. 你地係notebook到要簡下面嘅撰項
PowerPoint
Notes
- 下載Java https://java.sun.com
- 以下是HelloWorld代碼
class Example1{
public static void main(String args[]){
System.out.println("Hello World");
}
}
Compile指令
javac Example1.java
java Example1
常見錯誤
錯誤一 : 打錯字
首先打錯字唔洗驚, 睇下個Error Message, 佢會有個箭咀指住大約錯邊個位, 同埋有個行數, 跟住就可以揾到錯邊
錯誤二: Save錯文件名
錯誤張文件名Save做.java.txt, 所有Java文件必需要用.java做尾. 你地係notebook到要簡下面嘅撰項
HOC system proposal 1
Get in HKPS website, you see “Hour Of Code” menu on top If you are not registered yet, you jump in above page. Two options: register for teen or adult This is the main screen, since we don’t have many courses yet, so no search bar. “On going” means the course still has lessons, you […]
Get in HKPS website, you see "Hour Of Code" menu on top
If you are not registered yet, you jump in above page. Two options: register for teen or adult
This is the main screen, since we don't have many courses yet, so no search bar. "On going" means the course still has lessons, you may ask teacher questions. "Done" means the course is ended, no question to teacher.
View course info and video play back
Lunch with Thei and Microsoft
Lunch with Thei and Microsoft to discuss the project about the AI platform
Lunch with Thei and Microsoft to discuss the project about the AI platform
McCode
McCode is a weekly event for coding enthusiasts who want to share their passion, learn new skills, and enjoy some delicious food. Every week, we meet at a local McDonald’s restaurant and work on different coding projects, challenges, and tutorials. Whether you are a beginner or an expert, you are welcome to join us and […]
McCode is a weekly event for coding enthusiasts who want to share their passion, learn new skills, and enjoy some delicious food. Every week, we meet at a local McDonald’s restaurant and work on different coding projects, challenges, and tutorials. Whether you are a beginner or an expert, you are welcome to join us and have fun with coding. McCode is a great opportunity to network with other coders, get feedback on your work, and discover new tools and resources. Plus, you get to enjoy some tasty burgers, fries, and drinks while you code. What’s not to love? If you are interested in joining McCode, please visit our website and sign up for our newsletter. We hope to see you soon at McCode, the coding event that satisfies your hunger for learning and eating.
FGPA Workshop 2023/12/01
Thank you someone for providing us with the venue (we can’t disclose his name). The workshop is very hands-on and everyone gets their first feeling to code the FPGA.
Thank you someone for providing us with the venue (we can't disclose his name). The workshop is very hands-on and everyone gets their first feeling to code the FPGA.
