Skip to main content

Burnout


Burnout

COMMENT *

  Demo (and semi-useful) program to read/set burnout device parameters.

  Usage: burnout [ticks] [C+-] [V+-] [H+-]

  Parameters can be separated by almost anything.
  With no parameters, program simply returns current status.

  Examples:
    burnout 5000                (sets time to 5000 ticks)
    burnout 5000H+              (time=5000, use hardware blanking)
    burnout 5000,h+             (ditto, separators don't matter)
    burnout c+h-v+              (continuous clear, software, monitor video)
    burnout /C+ /H- /V+         (ditto)
    burnout                     (return status only)

  Assembly/link:
    masm burnout;
    link burnout;  (ignore NO STACK warning message)
    exe2bin burnout burnout.com


stdout equ 1                            ; DOS output files
stderr equ 2

; ----- General equates
DOS         equ 21H                     ; DOS interrupt
TERMINATE   equ 20H                     ; Exit to DOS

PRINT       equ 09H                     ; DOS "print" string to stdout
FOPEN       equ 3D02H                   ; DOS file open, read/write
FREAD       equ 3FH                     ; DOS file read
FWRITE      equ 40H                     ; DOS file write

CR          equ 13                      ; ASCII carriage return
LF          equ 10                      ; ASCII line fine

code segment
assume cs:code,ds:code

org 80H                                 ; Parm storage area in PSP
ParmLength label byte                   ; Length of parms
org 81H
Parameters label byte                   ; Start of parms

org 100H                                ; Org for .COM
main proc far
        jmp start                       ; Hate to execute data

DevName         db 'BRNDEV',0           ; Burnout device name
handle          dw ?                    ; Storage for handle
Flush           db '@'                  ; Char to flush device I/O
Execute         db '#'                  ; Char to execute device commands

NotInstalled    db 'Burnout device is not installed',13,10
NotInstalledL   equ $ - NotInstalled

Status          db 'Current status: '   ; Status message
StatInsert      db 40 dup (?)           ; brndev will store status here

; ----- Open the device
start:
        mov dx,offset DevName           ; DS:DX => device name
        mov ax,FOPEN
        int DOS
        jnc A1                          ; Continue if no error
        mov bx,stderr                   ; Message to stderr
        mov cx,NotInstalledL
        mov dx,offset NotInstalled
        mov ah,FWRITE
        int DOS
        jmp exit

; ----- Flush any pending I/O to/from the device
A1:
        mov handle,ax                   ; Save device handle
        mov dx,offset Flush             ; Point to the "@"
        mov cx,1                        ; Writing one byte
        mov bx,handle                   ; Device handle
        mov ah,FWRITE                   ; Write "@" to device
        int DOS

; ----- Send and execute parameters if present
        mov cl,ParmLength               ; Parm length to CL
        or cl,cl                        ; Any parms present?
        jz A2                           ; Skip if not
        xor ch,ch                       ; CX = parm length
        mov dx,offset Parameters        ; DS:DX => parms
        mov bx,handle                   ; BX = device handle
        mov ah,FWRITE                   ; Write parms to device
        int DOS

        mov dx,offset Execute           ; Execute the parms
        mov cx,1                        ; Writing one byte
        mov bx,handle                   ; Device handle
        mov ah,FWRITE                   ; Write "#" to device
        int DOS


; ----- Get and display device status
A2:
        mov dx,offset StatInsert        ; DS:DX => where to put status
        mov cx,0FFH                     ; Ask for lots of data; DOS will ...
                                        ; ... fetch only until CR found.
        mov bx,handle                   ; Device handle
        mov ah,FREAD                    ; Read device info
        int DOS

        mov cx,ax                       ; CX = actual # bytes read
        mov di,offset StatInsert        ; Where the stat data is stored
        add di,cx                       ; Add length of input read
        mov al,CR                       ; Store a CR/LF/'$' at end
        cld
        stosb
        mov al,LF
        stosb
        mov al,'$'
        stosb
        mov dx,offset Status            ; Write status to stdout
        mov ah,PRINT
        int DOS

exit:
        int TERMINATE                   ; Exit to DOS
main endp
code ends
end main

Labels:

Popular posts from this blog

What is iostream.h in C++ Programing Language ?

In C++ programing language, all header files end with .H extension. In standard C++, all devices are accessed and used as a file.  One such header file is iostream.h in C++ programming language. In this, all input and output devices are treated as files.  Let's quickly look at what are the input and output devices mean in C++ program.  Standard Input Device - Keyboard  Standard Output Device   - Monitor  Standard Error Device - Screen or monitor In C++, input and output are not defined within, and are implemented with the help of a component of the C++ standard library which is I/O library.  A file is read simply as a stream of bytes at the lowest level. But at a user level, a file consists of possibly mixed data types which can be characters, arithmetic values class, objects etc.  What are the predefined streams in I/O Library? As discussed above there are input, output and error library in c++, they have some predefined streams objects as well w...
Read more

C++ Program to find the sum, difference, product and quotient of two integers

#include <iostream.h> #include <conio.h> void main() {   clrscr();   int x = 10;   int y = 2;   int sum, difference, product, quotient;   sum = x + y;   difference = x - y;   product = x * y;   quotient = x / y;   cout << "The sum of " << x << " & " << y << " is " << sum << "." << endl;   cout << "The difference of " << x << " & " << "y <<  is " << difference << "." << endl;   cout << "The product of " << x << " & " << y << " is " << product << "." << endl;   cout << "The quotient of " << x << " & " << y << " is " << quotient << "." << endl;   getch(); }
Read more

What is Dynamic Memory Allocation in C++ Program

In the computer world, anything that is processed be it an instruction or any data first needs to be loaded and located in internal memory.  In C++ programs also any data that is processed while executing the program is held in the internal memory.  What is Dynamic Memory Allocation? Dynamic Memory allocation means that the memory that will be used during the program is not known beforehand and is allocated dynamically and on the go. It is allocated during the runtime as and when required by the program. In C++ there are two operators used in dynamic memory allocation  1. New  2. Delete New operator in dynamic memory allocation The new operator in C++ is used to create objects of all types. The new operator will allocate memory of the size of the data type specified in the program.  For Example iptr = new int ;  Storing initial values will allocate needed amount of memory from the free store to hold the value of the specified data-type and store the startin...
Read more