Bawsetshire Local Education AuthorityABCDE

• Simulator Registration Form

The fastest way to register is on-line. If you can't use this service, please use this form.

Please fill in this form and mail it to the address below. These details will not be passed to any junk mail organisation.

Educational institutions should include a cheque for 15 GB Pounds OR 25 Euros OR 30 US Dollars OR the equivalent in your own currency.

Cheques should be made payable to C N Bauers.

Please mail me at nbauers@samphire.demon.co.uk to agree a price in your local currency.

Please check this address is up-to-date on the website.

C N Bauers
87 Cliff Hill
Gorleston
Great Yarmouth
Norfolk
NR31 6DH
United Kingdom

Please provide your details below (please write clearly!) ...

Institution Name _________________________________________

Institution Address ______________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________

__________________________________________________________

Your EMail address _______________________________________

• FAQ and Bugs

1. Bugs and Features

If you discover other problems, please send me an E Mail.

I will cure the easy bugs and list the hard ones here.

1. Is there a Discussion Forum?

1. Why is my display messed up?

1. Where are my windows?

1. Why won't this file save? "Sms32v50.Ini"

1. Why can't I save my work?

• PC Support Handbook

1. The PC Support Handbook

Details are at http://www.dumbreck.demon.co.uk/

This book covers PC architecture in some detail and makes excellent further reading in conjunction with the use of this simulator.

The book's ISBN reference is 09541711-1-X and it is available in the following ways:

• 
  From all major book distributors.
  
• 
  From the Maplin chain of stores or Maplin mail/web order.
  
• 
  Directly from the publishers, Dumbreck Publishing. This is often the quickest method.
  

1. PC Support Handbook Contents

2. 
   Computer Basics
   
3. 
   Software & Data
   
4. 
   Operating Systems
   
5. 
   Numbering Systems
   
6. 
   Computer Architecture
   
7. 
   Display Technology
   
8. 
   Computer Memory
   
9. 
   Discs & Drives
   
10. 
    Computer Peripherals
    
11. 
    System Selection
    
12. 
    Hardware Installation
    
13. 
    P.C. Configuration
    
14. 
    Windows Configuration
    
15. 
    P.C. Support
    
16. 
    Faultfinding
    
17. 
    Computer Security
    
18. 
    Data Communications
    
19. 
    Local Area Networks
    
20. 
    The Internet
    
21. 
    Creating Websites
    
22. 
    Multimedia
    

• Using the Simulator - Getting Started

1. On Line Help

1. Writing a Program

Type in your program. It is best to get small parts of the program working rather than typing it all in at once.

Here is a simple example. Also look at the tutorial example programs. You can type this into the simulator or copy and paste it. The assembly code has been annotated with comments that explain the code. These comments are ignored by the assembler program. Comments begin with a semicolon and continue to the end of the line.

; ===== COUNT =================================================

MOV AL,0 ; Move 0 into the AL register

REP: ; This label is used with jump commands

ADD AL,2 ; Add two to AL

JMP REP ; Jump back to the rep label

1. ; ============================================================= 

2. Running a Program

1. To run a program, you can step through it one line at a time by pressing Alt+P or by clicking this button repeatedly. You can run a program continuously by pressing F9 or Alt+R or by pressing this buttonTo speed up or slow down a running program use these buttons or type Alt+L or Alt+TTo stop a running program press Alt+O or click or press Escape or press this button.To restart a paused program, continuing from where it left off, press Alt+N or click this button.To restart a program from the beginning, reset the CPU by pressing Alt+E or click this button.To re-open the RAM display window, press Alt+M or click this button. 

2. Assembly Code

1. The code you type is called assembly code. This human-readable code is translated into machine code by the Assembler. The machine code (binary) is understood by the CPU. To assemble a program, press Alt+A or click this button.You can see an animation of the assembler process by checking this box.When you run or setp a program, if necessary, the code is assembled. 

2. Assembler Phases

1. 
   Save the source code.
   
2. 
   Convert the source code into tokens (this simulator uses human readable tokens for educational value rather than efficiency).
   
3. 
   Parse the source code and (if necessary) generate error messages. If there are no errors, generate the machine codes. This process could be coded more efficiently. If the tokens representing machine op codes like MOV and JMP were numerical, the assembler could look up the machine code equivalents in an array instead of ploughing through many if-then-else statements. Once again, this has been done to demonstrate the process of assembling code for educational reasons.
   
4. 
   Calculate jumps, the distances of the jump/branch instructions.
   

1. Viewing Machine Code

1. Tutorial Examples

• 
  
  Directory: courses
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  courses -> A hurricane track density function and empirical orthogonal function approach to predicting seasonal hurricane activity in the Atlantic Basin Elinor Keith April 17, 2007 Abstract
  courses -> Cover page need figure & title by Proposed Table of Contents
  courses -> Objectives
  courses -> Dr. Jeff Masters' WunderBlog
  
  
  
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