SPO600 Labs - Tuan Vuong

 Lab 2, where I have a given 6502 assembly code: lda #$00 ; set a pointer at $40 to point to $0200 sta $40 lda #$02 sta $41 lda #$07 ; colour number ldy #$00 ; set index to 0 loop: sta ($40),y ; set pixel at the address (pointer)+Y iny ; increment index bne loop ; continue until done the page inc $41 ; increment the page ldx $41 ; get the current page number cpx #$06 ; compare with 6 bne loop ; continue until done all pages My job is to play around with the code, calculate the performance of the given code, and try to optimize the code to have a better performance. First, starting to run the code on  http://6502.cdot.systems/  - a website that stimulates a 6502 emulator, I got a result of a yellow screen, which consists of 4 pages.  Let's look at the performance by calculating the number of cycles and cycle count. We will do this on Microsoft Excel to have a clear perspective. After doing some calculations on Excel, I got a result of 0.012 seconds. How did I fin

 In the first lab of SPO600 course, my work is to explore two open-source software projects. As an Android user, who like to root my phone (I have a Pixel 6, and I saw you are having one too), I am using several applications that take advantage of root permissions. One of those apps is Adaway – an application that blocks ads system-wide. Source: https://adaway.org/ Looking at its source code on Github, I found the software is distributed under GNU GENERAL PUBLIC LICENSE - Version 3. In short, PGLv3 is a copyleft license, which requires copies or modifications of the source must also be released under the same license. Everyone can make contributions to the project by reporting bugs, suggesting enhancements, or translating to languages. For example, look at the most commented pull request – pull request number 784: Source: https://github.com/AdAway/AdAway/pull Source: https://github.com/AdAway/AdAway/pull/784 There were 21 commits and months needed in total to resolve the issue. The