Talk:CPU unofficial opcodes: Difference between revisions

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Given that instruction $8B is [http://visual6502.org/wiki/index.php?title=6502_Opcode_8B_%28XAA,_ANE%29 unstable], what exactly is the game expecting it to do? — [[User:Lidnariq|Lidnariq]] ([[User talk:Lidnariq|talk]]) 23:02, 31 January 2017 (MST)
Given that instruction $8B is [http://visual6502.org/wiki/index.php?title=6502_Opcode_8B_%28XAA,_ANE%29 unstable], what exactly is the game expecting it to do? — [[User:Lidnariq|Lidnariq]] ([[User talk:Lidnariq|talk]]) 23:02, 31 January 2017 (MST)
== Doctoral Dissertation ==
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Revision as of 07:12, 3 October 2017

Puzznic on a Z80?

Regarding this edit: what does the arcade version running on a Z80 have to do with the NES version? I understand the idea that sharing code that may have been written for 65C02 could cause this particular problem (which is why I didn't just remove that bit of conjecture; though I am starting to regret not removing it), but I don't understand why the arcade version being a Z80 would be pertinent to 6502 code having a weird NOP in it. There were 15 or so different ports of this game, and the relevant ones to inspect might include the C64 and PCE versions, as well as Apple II prototype. If you're looking to make some connection, you could research the opcodes used in these versions, but at this point that's a lot of work to chase down a speculative footnote about why there's a hidden bug (?) in the game.

Is it even a bug? Does the code seem to expect a BIT #imm functionality? Answering these two questions seems like a prerequisite for even making the 65C02 speculation in the first place. Every bad opcode's gonna mean "something" on another variant... Never mind, I think I'm just going to go the rest of the way and trim it entirely. We haven't justified the connection, at face value. - Rainwarrior (talk) 21:14, 29 May 2016 (MDT)

Took a quick look at it and I don't think there's any reason to speculate about BIT #imm. It's actually BIT #0 ($89 $00), and A will always be $01 when it is hit. Follow the subsequent code any flags this would set are overwritten before they are used. Wondered if it might be an accidentally misspelled LDA #0 ($A9 $00) because it's in a block of code that's a bunch of "LDA #imm + STA zp" stuff, but trying this destroys the game, so it's clearly not supposed to be that. In this particular case BIT #imm is just as much of a NOP as the 6502 version. I don't think it makes worthwhile speculation. - Rainwarrior (talk) 00:26, 30 May 2016 (MDT)

Gaau Hok Gwong Cheung (Ch)

Given that instruction $8B is unstable, what exactly is the game expecting it to do? — Lidnariq (talk) 23:02, 31 January 2017 (MST)

Doctoral Dissertation

Writing doctoral dissertation is a prerequisite before a PhD degree conferred to you. It usually entails conducting some form of research. Dissertation writing is therefore not among the simplest form of writing you will come across. Dissertation writing process will normally begin by selecting of a topic or a concept. The topic should be on a relevant field and that which would lead to development of new knowledge in the field. While selecting a topic for dissertation writing, ensures that your topic is simple, realistic and attainable. After you have decided on a topic, you need to embark on writing a dissertation proposal. A dissertation proposal is a detailed work plan that provides specific details on how your dissertation project will be conducted. The proposal should contain; an introduction of the topic, the problem statement of your dissertation, objectives, research questions and hypothesis of your study and research methods you plan on using. A proposal in dissertation writing should also contain a literature review. A literature review is a detailed analysis of what other authors have said about your topic of study. The dissertation proposal should also include a work schedule and a budget plan for your dissertation project. After writing your proposal the next step is the collection and analysis of data. There are many approaches for collecting and analyzing data and the choice of these will dependent on the study. Then next is the actual dissertation writing. Dissertation papers should contain all those details included in the proposals. It should also encompass chapters that present the results and finding of the study. Dissertation writing should follow specific structure and style of formatting. This again will vary depending on your study type, institution or field of study. This process of dissertation writing consumes a lot of time and requires a lot of expertise and experience. These sometimes present a challenge to many students when it comes to dissertation writing. We are now providing dissertation writing services. We are offering dissertation papers for a variety of academic fields including; history, sciences, business, psychology and literature among many others. We have highly experienced writers who are also experts in dissertation writing. These dissertation writers are all PhD graduates who have years of practice in writing and have never disappointed when it comes to writing dissertation papers. Our writers will ensure that all the standards for your dissertation writing are adhered to. Though some standard requirement will vary from one dissertation papers to the other, there are some dissertation writing standard requirements that apply to all dissertation papers. One of them is the use of correct language, sentences, spelling and punctuations. Errors committed in such areas my completely alter what you intended to communicate in your dissertations. Another requirement is that your dissertation papers should be original and plagiarism free. To ensure that our papers remain 100 percent original and non-plagiarized we have instructed our writers to always start the writing process from scratch. We also scan all our papers using plagiarism checking software before we hand them over to our client. When you purchase our dissertation writing services, you receive papers that are guaranteed to satisfy your individual needs. This is because all our dissertation papers are custom written which ensures that we are able to adhere to our customers' concerns and focus in meeting their expectations. Our dissertation writing services are also available at affordable prices.