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

Putimage function in c

putimage function outputs a bit image onto the screen. Declaration:- void putimage(int left, int top, void *ptr, int op); putimage puts the bit image previously saved with getimage back onto the screen, with the upper left corner of the image placed at (left, top). ptr points to the area in memory where the source image is stored. The op argument specifies a operator that controls how the color for each destination pixel on screen is computed, based on pixel already on screen and the corresponding source pixel in memory. c smiling face animation This animation using c draws a smiling face which appears at random position on screen. See output below the code, it will help you in understanding the code easily. C programming code #include<graphics.h> #include<conio.h> #include<stdlib.h>   main() { int gd = DETECT, gm, area, temp1, temp2, left = 25, top = 75; void *p;   initgraph(&gd,&gm,"C:\\TC\\BGI");   setcolor(YELLOW)...
Read more

What are selection statements in C++ ? If and Switch

There are several statements that we can use in C++ programming that help in choosing a set of instructions for using the code depending upon an expression truth value.  What are Selection Statements in C++? As mentioned above there are several statements that we can use to choose a set of pre-defined instructions within a program in any section of the program as per the need. These are called selection statements in C++  In C++ Program there are two types of Selection statements  1. If  2. Switch  The If Statement of C++ To understand "if statement" let's look at an example.  Example - If you have 10 rupees then you can buy the chocolate.  Here, there is a condition in buying chocolate, if you have 10 rupees then only you can buy it.  This shows that the If is a condition which can be true or false, If it is false it won't be executed, in this example, if you don't have 10 rupees i.e. the condition is false you cant buy the chocolate.  So, I...
Read more

What are the characteristics of a good program in C++

The program should be written in a good style so that it is understandable to a reader. A good program is efficient in solving the given program.  Here are some of the characteristics of a good program : Effective and Efficient  User Friendly  Self-Documenting Code  Reliable  Portable  I.  Effective and Efficient The program produces correct results and works faster, taking into account of the memory constraints.  II.  User Friendly The user should not be concerned about inside the program, a program should work with the user by understandable messages and user work should be very low. The user should only be responsible to provide input the rest of the program should do.  III.  Self-Documenting Code A good program must be self-documented. The source code uses meaningful names for variables, subprograms and other constants.  IV.  Reliable The program must be able to handle unexpected situations like wrong data or no data,...
Read more