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berk76 / bom.md
Last active November 11, 2017 19:54
BOM

Byte Order Mark

Byte Order Mark (BOM) is a Unicode character used to signal the endianness (byte order) of a text file or stream. Its code point is U+FEFF. BOM use is optional, and should appear at the start of the text stream, if used.

Types of BOM:

Encoding Representation
UTF-8 EF BB BF
UTF-16 (BE) FE FF
@berk76
berk76 / windows_service.md
Last active November 12, 2017 22:10
Framework for Windows NT/2000/XP service application

Template for creating Windows service application in c

All necessary information are included in comments within following template.

/* --------------------------------------------
   Framework for Windows NT/2000/XP service application
   Copyright (c) 2005, Franck Charlet
   All rights reserved.
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berk76 / AS400.md
Last active March 4, 2020 20:57
CL Commands
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berk76 / cursor.md
Last active December 30, 2017 10:03
DOS: Cursor mangling in C

Cursor mangling in C

/*********************************************************************/
/*                                                                   */
/*  All the following functions were written by Paul Edwards and     */
/*  placed in the Public Domain except for cursor() which was        */
/*  written by Gary Chambers and I am waiting for him to tell me     */
/*  whether his routine can be placed in the Public Domain.  Oh      */
/*  yeah, I modified Gary's routines *slightly*.                     */
@berk76
berk76 / fireworks.md
Last active December 31, 2017 21:27
DOS: Fireworks in basic

Fireworks in QBasic

FIREWORK.BAS from unknown author

DECLARE SUB bmper ()
DECLARE SUB delay (seconds!)
RANDOMIZE TIMER
CONST del = .02         'Sets standard movement delay (.02)
CONST scrnmode = 13     'Sets SCREEN mode (12 or 13)
CONST lowerbound = 100  'Least amount of sparks to create (100)
@berk76
berk76 / clavier.md
Created January 2, 2018 10:11
DOS: Clavier

Simple AdLib FM Clavier by Indrek Pinsel 1993

  • CLAVIER.COM - Executive
  • CLAVIER.DOC - This document
  • CLAVIER.C - C source

Tiny computer keyboard FM player for those who have kind of AdLib or Sound Blaster. It's just a little piece of code for fun...

NB! The Extended (4-operator) FM Synthesis Mode of SBPro 2 is not controlled. Due to it there may be missounds when the Clavier is executed with SBPro 2 with ExtFM switched on.

@berk76
berk76 / c_asm.md
Last active April 2, 2020 20:45
DOS: TASM and C

How to combine Assembly and C in DOS

This gist is showing an example of C program calling routine written in assembly.

Some theory

  • C is case sensitive so it is necessary to use /ml switch in TASM
  • C compiler uses leading underscore (_) character for function names
  • parameters are passed to function in stack and integer return value is passed back in AX register
  • stack cleaning is done by caller
@berk76
berk76 / memory_model.md
Last active September 26, 2022 23:42
DOS: Choosing a memory model 
C News  Vol. 1  Issue 11                         Sept 15, 1988


        CHOOSING A MEMORY MODEL by Bill Mayne

        ABSTRACT:   The  meaning  of  the  "near",  "far",  and  "huge"
        keywords specifying pointer types and how these are related  to
        the  various memory models available to C programmers using the
        80x86 family of processors used in IBM and compatible  PCs  and
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berk76 / plot.md
Last active January 6, 2018 21:22
DOS: Changing CRT mode using TC and inline asm

Changing CRT mode using TC and inline assembler

This program is an example of using Turbo C inline assembly statements. For compilation you will need:

  • Turbo C 2.01 and Turbo Assembler installed (tcc -B plot.c)
  • or Borland C++ 3.1 (bcc -B plot.c)
/****************************************************************
*                                                               *
@berk76
berk76 / flakes.md
Last active January 8, 2018 14:37
DOS: Snow flakes