MS-DOS, PC-BIOS, and File I/O Chapter 13
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Hacker's Handbook for Ringzer0 Training, by Steve Lord
Hacker’s Handbook For Ringzer0 Training, by Steve Lord This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Copyright ©2021 Raw Hex Ltd. All Rights Reserved. Retro Zer0 is a trademark of Ring Zer0 Training. Raw Hex is a trademark of Raw Hex Ltd. All other trademarks are the property of their respective owners. Raw Hex Ltd reserve the right to make changes or improvements to equipment, software and documentation herein described at any time and without notice. Notice: Please be advised that your Retro Zer0 has no warranty, and that tampering with the internal hardware and software of your Ring Zer0 is widely encouraged as long as you do so with appropriate regard to safety. Contents 1 Preface 5 1.1 Safety ........................... 6 1.2 Understanding This Document ............ 6 2 Before You Start 7 2.1 Check You Have Everything .............. 7 2.2 Back Up The SD Card ................. 8 2.3 Connecting Up Your Retro Zer0 ............ 8 2.4 Powering Up ....................... 10 2.5 Resetting Your Retro Zer0 . 10 2.6 Powering Down ..................... 10 3 First Steps 11 3 4 CONTENTS 3.1 Testing The Keyboard . 11 3.2 Using CP/M ....................... 12 3.3 Would You Like To Play A Game? . 14 3.4 MultiCPM Extras ..................... 17 3.5 Useful Tools ....................... 19 3.6 What’s On The Card? . 20 3.7 Putting It All Together . 23 3.8 Where To Read More . 25 4 Being Productive With Retro Zer0 27 4.1 WordStar .........................27 4.2 Supercalc .........................30 4.3 DBase ...........................32 4.4 Microsoft BASIC .....................32 4.5 Turbo Pascal .......................34 4.6 Forth 83 .........................36 4.7 ZDE ............................38 4.8 Z80 Assembler .....................39 4.9 Hi-Tech C .........................43 4.10 XLisp ...........................46 CONTENTS 5 4.11 Installing New Software . -
Virus Bulletin, March 1991
March 1991 ISSN 0956-9979 THE AUTHORITATIVE INTERNATIONAL PUBLICATION ON COMPUTER VIRUS PREVENTION, RECOGNITION AND REMOVAL Editor: Edward Wilding Technical Editor: Fridrik Skulason, University of Iceland Editorial Advisors: Jim Bates, Bates Associates, UK, Phil Crewe, Fingerprint, UK, Dr. Jon David, USA, David Ferbrache, Information Systems Integrity & Security Ltd., UK, Ray Glath, RG Software Inc., USA, Hans Gliss, Datenschutz Berater, West Germany, Ross M. Greenberg, Software Concepts Design, USA, Dr. Harold Joseph Highland, Compulit Microcomputer Security Evaluation Laboratory, USA, Dr. Jan Hruska, Sophos, UK, Dr. Keith Jackson, Walsham Contracts, UK, Owen Keane, Barrister, UK, Yisrael Radai, Hebrew University, Israel, John Laws, RSRE, UK, David T. Lindsay, Digital Equipment Corporation, UK, Martin Samociuk, Network Security Management, UK, John Sherwood, Sherwood Associates, UK, Dr. Peter Tippett, Certus International Corporation, USA, Dr. Ken Wong, PA Consulting Group, UK, Ken van Wyk, CERT, USA. CONTENTS SOFTWARE STRATEGY Defining Executable Code in the Advent of Windows 10 EDITORIAL 2 VB PRESENTATIONS 11 TECHNICAL NOTES 3 VIRUS ANALYSES THE VB CONFERENCE 1. INT13 - A New Level of Final Programme 4 Stealthy Sophistication 12 2. Casino - Gambling With INTEGRITY CHECKING Your Hard Disk 15 The Flawed Six Byte Method 6 OPINION PROGRAM TACTICS TSR Monitors and Memory Scanners - The ‘Playground’ Approach to Virus Detection 18 Developing a Virus Scanner 7 END-NOTES & NEWS 20 IBM PC VIRUSES (UPDATES) 9 VIRUS BULLETIN ©1991 Virus Bulletin Ltd, 21 The Quadrant, Abingdon Science Park, Oxon, OX14 3YS, England. Tel (+44) 235 555139. /90/$0.00+2.50 This bulletin is available only to qualified subscribers. No part of this publication may be reproduced, stored in a retrieval system, or transmitted by any form or by any means, electronic, magnetic, optical or photocopying, without the prior written permission of the publishers. -
Uefi وبعض أنظمة Bios Uefi واجهة الربنامج الثابت املوحدة والقابلة للتمديد
- جدول أقسامGUID GUID Partition Table جدول أقسام )أو تقسيم( يستخدم املعرفات الفريدة العميمة "! G % تعري. و-يي, ا+قسام *( ال)'ي& املقسم % أ$#مة !0/ و2ع1 أ$#مة 45!3 UEFI واج=ة ال>$ا;: ال9ا82 امل)7دة والقا62ة ل6تمديد مس جد? % ;<رم ّو@B @AA دة 'Cتمرب/أي6)ل DE@F2 " F جدول أقسام GUID *باIة *H تخGيط )أو تقسيم( جدول أقسام ;عياJI *( أج=,ة التخ,يH الفي,ياKيةM9; L ا+قراN الثا2تةL أو أقراN الحالة الC6OةPQ Lا التخGيط يستخدم املعرR الفريد العميم U@TS % متيي, ا+قسام وأ$)ا*هاL وXIم أ$W ج,H; V ;عياI واج=ة ال>نا;: الثا82 امل)حدة والقا62ة ل6تمديد !U ZD S YL /0 )املق^[ ;H ;\تد] h _`abc /0! 0defgبديM ل6\ظام التق6يدJ 45!3( $ظام Hlm GPj ا'تخدا;W أيضا % 2ع1 أ$#مة 45!3 بسnC ;حدو?ية جدول أقسام Lo3p الذJ يستخدم 82qTD فقط % تخ,يH ;ع6)مات ال<rم و*ناويr7 v; us3t Hم القGاw التق6يدqx@D Jبايu8 ;ع#م أ$#مة التشyيM تد*م P\; LGPj العام LDE@E 2ع1 ا+$#مة ;M9 ما{ أوu|} ومايكرو')ف8 ويندو~ )x86( تد*م فقط اإلقالH; w أقسام GPj % أ$#مة !L /0!B/0 2ي\ام ;ع#م ت)~يعات لي\lس و ت)~يعات 2ريhيل ي)$lس ;M9 فرJ يب |} ?lm J\ها اإلقالH; w أقسام GPj % أج=,ة 45!3 أو أج=,ة !u /0 6A TD % ا+قراN الثا2تة التي تستخدم r7م القطاw املعياx@D JI بايL8 ال<rم ا+قىص ل6قرN با'تخدام DuD (Q o3p ترياباي8 أو ) x@D × D بايuU @ S )8 2ي\ام ال<rم ا+قىص ل6قرN با'تخدام GPj 'يك)ن FuA ~يتاباي8 أو ) x@D × D بايU T S U @ S )8 والسnC % ذلك ا'تخدام H; 82 6A أجM *ناويH الكتM امل\Gقية % جدول أقسام u GPj تاIيخياL رشhة |$تي LM كا$8 وIاV تG)ير LGPj أواخر التسعينات )L)DEEE الذJ أصCح ج,H; V ;)اصفة !U D S Y /0 % عام DE@E وت<8 |?اIة Qيئة خاصة تد*ى !P\; u _`abc /0 عام uDEEF قطاعات GPT % عام LDE@E *ندما بدأ ;\تr)ن ا+قراN الثا2تة الت<)ل |ىل ت)ظي. -
Programmer's Reference Guide, This Section Could Be of Assistance in Getting Around
PEN*KEYR 6100 Computer PROGRAMMER’S REFERENCE GUIDE """"""""""""""""""""" P/N 977-054-001 Revision B December 2000 " NOTICE The information contained herein is proprietary and is provided solely for the purpose of allowing customers to operate and service Intermec manufactured equipment and is not to be released, reproduced, or used for any other purpose without written permission of Intermec. Disclaimer of Warranties. The sample source code included in this document is presented for reference only. The code does not necessarily represent complete, tested programs. The code is provided AS IS WITH ALL FAULTS." ALL WARRANTIES ARE EXPRESSLY DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. We welcome your comments concerning this publication. Although every effort has been made to keep it free of errors, some may occur. When reporting a specific problem, please describe it briefly and include the book title and part number, as well as the paragraph or figure number and the page number. Send your comments to: Intermec Technologies Corporation Publications Department 550 Second Street SE Cedar Rapids, IA 52401 ANTARES, INTERMEC, NORAND, NOR*WARE, PEN*KEY, ROUTEPOWER, TRAKKER, and TRAKKER ANTARES are registered trademarks and ENTERPRISE WIRELESS LAN, INCA, Mobile Framework, TE 2000, UAP, and UNIVERSAL ACCESS POINT are trademarks of Intermec Technologies Corporation. 1996 Intermec Technologies Corporation. All rights reserved. Acknowledgments ActiveX, Microsoft, MS, and MSĆDOS, Windows, and Windows NT are registered trademarks and MSDN, Visual Basic, Visual C++, and Windows for Pen are trademarks of Microsoft Corporation. Borland, dBase, and Turbo Pascal are registered trademarks and Borland C and C++ for Windows are trademarks of Borland International, Inc. -
BIOS Enhanced Disk Drive Specification
BIOS Enhanced Disk Drive Specification Version 1.1 May 9, 1995 Ò Technical Editor: Curtis E. Stevens Phoenix Technologies 2575 McCabe Way Irvine, Ca. 92714 Phone: (714) 440-8000 Fax: (714) 440-8300 [email protected] Phoenix Technologies Ltd. THIS SPECIFICATION IS MADE AVAILABLE WITHOUT CHARGE FOR USE IN DEVELOPING COMPUTER SYSTEMS AND DISK DRIVES. PHOENIX MAKES NO REPRESENTATION OR WARRANTY REGARDING THIS SPECIFICATION OR ANY ITEM DEVELOPED BASED ON THIS SPECIFICATION, AND PHOENIX DISCLAIMS ALL EXPRESS AND IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND FREEDOM FROM INFRINGEMENT. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, PHOENIX MAKES NO WARRANTY OF ANY KIND THAT ANY ITEM DEVELOPED BASED ON THIS SPECIFICATION WILL NOT INFRINGE ANY COPYRIGHT, PATENT, TRADE SECRET OR OTHER INTELLECTUAL PROPERTY RIGHT OF ANY PERSON OR ENTITY IN ANY COUNTRY. USE OF THIS SPECIFICATION FOR ANY PURPOSE IS AT THE RISK OF THE PERSON OR ENTITY USING IT. Enhanced Disk Drive Specification Version 1.1 Version 1.1 Copyright ã 1995 Phoenix Technologies Ltd. All Rights Reserved. Phoenix Technologies Ltd Enhanced Disk Drive Specification PRELIMINARY Version 1.1 Revision History Rev Date Description 1.0 January 25, 1994 Initial Release 1.1 January 25, 1995 Added the following: · Description of the 528 MB limitation · Description of compatibility issues caused by translation · Description of Int 13h Extensions as implemented by Phoenix · Description of the Translated Fixed Disk Parameter Table. · Support for ATAPI devices · Support for translation reporting Companies Supporting this Specification Phoenix Technologies 2575 McCabe Way Irvine, Ca. -
BIOS Boot Specification
Compaq Computer Corporation Phoenix Technologies Ltd. Intel Corporation BIOS Boot Specification Version 1.01 January 11, 1996 This specification has been made available to the public. You are hereby granted the right to use, implement, reproduce, and distribute this specification with the foregoing rights at no charge. This specification is, and shall remain, the property of Compaq Computer Corporation (“Compaq”), Phoenix Technologies Ltd (“Phoenix”), and Intel Corporation (“Intel”). NEITHER COMPAQ, PHOENIX NOR INTEL MAKE ANY REPRESENTATION OR WARRANTY REGARDING THIS SPECIFICATION OR ANY PRODUCT OR ITEM DEVELOPED BASED ON THIS SPECIFICATION. USE OF THIS SPECIFICATION FOR ANY PURPOSE IS AT THE RISK OF THE PERSON OR ENTITY USING IT. COMPAQ, PHOENIX AND INTEL DISCLAIM ALL EXPRESS AND IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND FREEDOM FROM INFRINGEMENT. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, NEITHER COMPAQ, PHOENIX NOR INTEL MAKE ANY WARRANTY OF ANY KIND THAT ANY ITEM DEVELOPED BASED ON THIS SPECIFICATION, OR ANY PORTION OF IT, WILL NOT INFRINGE ANY COPYRIGHT, PATENT, TRADE SECRET OR OTHER INTELLECTUAL PROPERTY RIGHT OF ANY PERSON OR ENTITY IN ANY COUNTRY. Table of Contents 1.0 INTRODUCTION 5 1.1 REVISION HISTORY 5 1.2 RELATED DOCUMENTS 5 1.3 PURPOSE 5 1.4 TERMS 6 2.0 OVERVIEW 9 2.1 DESCRIPTION 9 3.0 IPL DEVICES 10 3.1 REQUIREMENTS FOR IPL DEVICES 10 3.1.1 IPL TABLE 10 3.1.2 PRODUCT NAME STRING 11 3.2 BAIDS 11 3.3 DEVICES WITH PNP EXPANSION HEADERS -
The Origins of Word Processing and Office Automation
Remembering the Office of the Future: The Origins of Word Processing and Office Automation Thomas Haigh University of Wisconsin Word processing entered the American office in 1970 as an idea about reorganizing typists, but its meaning soon shifted to describe computerized text editing. The designers of word processing systems combined existing technologies to exploit the falling costs of interactive computing, creating a new business quite separate from the emerging world of the personal computer. Most people first experienced word processing using a word processor, we think of a software as an application of the personal computer. package, such as Microsoft Word. However, in During the 1980s, word processing rivaled and the early 1970s, when the idea of word process- eventually overtook spreadsheet creation as the ing first gained prominence, it referred to a new most widespread business application for per- way of organizing work: an ideal of centralizing sonal computers.1 By the end of that decade, the typing and transcription in the hands of spe- typewriter had been banished to the corner of cialists equipped with technologies such as auto- most offices, used only to fill out forms and matic typewriters. The word processing concept address envelopes. By the early 1990s, high-qual- was promoted by IBM to present its typewriter ity printers and powerful personal computers and dictating machine division as a comple- were a fixture in middle-class American house- ment to its “data processing” business. Within holds. Email, which emerged as another key the word processing center, automatic typewriters application for personal computers with the and dictating machines were rechristened word spread of the Internet in the mid-1990s, essen- processing machines, to be operated by word tially extended word processing technology to processing operators rather than secretaries or electronic message transmission. -
Virus Infection Techniques: Boot Record Viruses
Virus Infection Techniques: Boot Record Viruses Bill Harrison CS4440/7440 Malware Analysis and Defense Reading } Start reading Chapter 4 of Szor 2 Virus Infection Techniques } We will survey common locations of virus infections: MBR (Master Boot Record) Boot sector Executable files (*.EXE, *.COM, *.BAT, etc.) } Most of the examples of these viruses, especially the first two types, are from the DOS and floppy disk era 3 Why Study Older Viruses? } Vulnerabilities remain very similar over time, along with the means to exploit them and defend against them } Modern Internet worms differ mainly in the use of the internet for transport, and are otherwise similar to older viruses } Older viruses illustrate the virus vs. antivirus battle over many generations 4 Boot-up Infections and the PC Boot-up Sequence } PC boot-up sequence: 1. BIOS searches for boot device (might be a diskette, hard disk, or CD-ROM) 2. MBR (Master Boot Record) is read into memory from the beginning of the first disk partition; execution proceeds from memory 5 Master Boot Record Structure Boot-up Sequence cont’d. 3. Beginning of MBR has tiny code called the boot- strap loader 4. Data area within MBR has the disk PT (partition table) 5. Boot-strap loader reads PT and finds the active boot partition 6. Boot-strap loader loads the first sector of the active partition into memory and jumps to it; this is called the boot sector 7 Boot-up Sequence cont’d. } MBR is always at BIOS the very first sector of the hard MBR: Expanded View MBR Boot-strap loader code (446 disk (first 512 -
INT 13H 08H: Get Drive Parameters
INT 13H 08H: Get Drive Parameters [XT] [AT] Expects: AH 08H DL drive: 80H-81H=hard disk -------------------------------------------------------------------------------------------------------------- Returns: AH BIOS disk error code if CF is set to CY CX maximum value for cylinder and sector (see below) DL number of hard disks on first controller DH maximum value for head ES:DI vendor specific ! (address of Hard Disk Parameter Table ) -------------------------------------------------------------------------------------------------------------- Info: Returns information about a drive. These values are initially set from a table in ROM, determined by the disk-type code stored in CMOS Memory . CX Bits 6-7 of CL are the high two bits of the 10-bit value whose low 8 bits are in CH. See INT 13H 02H for details. Hard Disk Parameter Table This 16-byte structure can be found at the vector address of INT 41H (the 4-byte address at 0:0104). The parameters for a second hard disk (if any) are found at the vector for INT 46H . These tables specify a variety of critical variables for hard disk drive operations. XT The switches on the controller board select one of four drive types for each hard disk drive. At boot time, the BIOS sets INT 41H and INT 46H as indicated on these switches. AT The INT 41H and INT 46H vectors are set according to the AT Drive Type value which is a CMOS Memory variable stored by the "Setup" program. HardDiskParmRec Offset Size Contents -------------------------------------------------------------------------------------------------------------- -
Practical C++ Programming Copyright 2003 O'reilly and Associates Page 1 I/O Packages
Chapter - 16 File Input/ Output Practical C++ Programming Copyright 2003 O'Reilly and Associates Page 1 I/O Packages There are 3 different I/O packages available to the C++ programmer: • The C++ streams package. This package is used for most I/O. • The unbuffered I/O package. Used primarily for large file I/O and other special operations. • The C stdio package. Many older, C-- programs use this package. (A C-- program is a C program that has been updated to compile with a C++ compiler, but uses none of the new features of the new language.) This package is useful for some special operations. Practical C++ Programming Copyright 2003 O'Reilly and Associates Page 2 C++ I/O C++ provides four standard class variables for standard I/O. Variable Use std::cin Console in (standard input) std::cout Console output (standard output) std::cerr Console error (standard error) std::clog Console log Normally std::cin reads from the keyboard, and std::cout, cerr, and clog go to the screen. Most operating systems allow I/O redirection my_prog <file.in my_prog >file.out Practical C++ Programming Copyright 2003 O'Reilly and Associates Page 3 File I/O File I/O is accomplished using the <fstream.h> package. Input is done with the ifstream class and output with the ofstream class. Example: ifstream data_file; // File for reading the data from data_file.open("numbers.dat"); for (i = 0; i < 100; ++i) data_file >> data_array[i]; data_file.close(); Open can be consolidated with the constructor. ifstream data_file("numbers.dat"); The close will automatically be done by the destructor. -
HUMBUG® 68000 Version
HUMBUG® 68000 Version by Peter A. Stark Copyright © 1986 - 1990 by Peter A. Stark Star-K Software Systems Corporation P. O. Box 209 Mt. Kisco, N. Y. 10549 All rights reserved Copyright © 1986 - 1990 by Peter A. Stark All Star-K computer programs are licensed on an "as is" basis without warranty. Star-K Software Systems Corporation shall have no liability or responsibility to customer or any other person or entity with respect to any liability, loss or damage caused or alleged to be caused directly or indirectly by computer equipment or programs sold by Star-K, including but not limited to any interruption of service, loss of business or anticipatory profits or consequential damages resulting from the use or operation of such computer or computer programs. Good data processing procedure dictates that the user test the program, run and test sample sets of data, and run the system in parallel with the system previously in use for a period of time adequate to insure that results of operation of the computer or program are satisfactory. SOFTWARE LICENSE A. Star-K Software Systems Corp. grants to customer a non-exclusive, paid up license to use on customer's computer the Star-K computer software received. Title to the media on which the software is recorded (cassette and/or disk) or stored (ROM) is transferred to customer, but not title to the software. B. In consideration of this license, customer shall not reproduce copies of Star-K software except to reproduce the number of copies required for use on customer's computer and shall include the copyright notice on all copies of software reproduced in whole or in part. -
The Database Language 95030
Tbe Database Language GEM Carlo Zaniolo Bell Laboratories Holmdel, New Jersey 07733 ABSTRACT GEM (bn acronym for General Entity Manipulator) is a general-purpose query and update language for the DSIS data model, which is a semantic data model of the Entity-Relationship type. GEM is designed as -an easy-to-use extension of the relational language QUEL. providing supporr for. the notions of entities with surrogates, aggregation, generalization, null values, and set-valued attributes. 1. INTRODUCTION generalization. The possibility of extending the relational model to capture more meaning - as A main thrust of computer technology is towards opposed to introducing a new model - was simplicity and ease of use. Database management investigated in [CoddZl, where, surrogates and null systems have come a long way in this respect, values were found necessaryfor the task. particularly after the introduction of the relational approach [Ullml, which provides users with a simple ,-‘Most previous work with semantic data models has tabular view of data and powerful and convenient concentrated on the problem of modeling reality and query languages for interrogating and manipulating on schema design; also the problem of integrating the database. These features were shown to be the the database into a programming environment key to reducing the cost of database-intensive supporting abstract data types has received application programming Ecddll and to providing considerable attention [Brad, KMCI. However, the a sound environment for back-end support and