Subversion Repositories shark

Rev

Go to most recent revision | Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
1085 pj 1
--------------------------------------
2
DOS_fXXX Demo
3
 
4
by
5
 
6
Paolo Gai          pj@sssup.it
7
and
8
Gabriele Bolognini gabrieleb@sssup.it
9
2001
10
 
11
--------------------------------------
12
 
13
The DOS_fXXX functions provided into ll/i386/x-dos.h are a few
14
shortcuts that can be used to call INT21's DOS calls.
15
 
16
These functions can be used to read and write files before/after
17
the kernel goes into i386 protected mode.
18
 
19
THEY CANNOT BE USED IF YOU BOOT WITH GRUB.
20
 
21
--------------------------------------
22
 
23
The demo is composed by:
24
 
25
MAKEFILE     The makefile used to compile the application;
26
             dosfs is the rule to compile the application
27
README.TXT   This file
28
INITFILE.C   The init file (only RR)
29
DOSFS.C      The DOS_fread and DOS_fwrite demo
30
 
31
--------------------------------------
32
 
33
The demo works as follows:
34
- Into __kernel_register_levels__() the demo reads up to 1000 bytes from
35
  myfile.txt
36
- Then, into the main() function it prints the contents of the buffer at
37
  screen
38
- Finally, at the end of the system it writes a file called myfile.out
39
  with up to 30 of the first bytes of the buffer
40
 
41
The demo should work on any processor speed, and does not use keyboard or
42
graphics.
43
 
44
Bug: at the moment (01 Jun 2001) sometimes the demo hangs when using
45
the one-shot timer.
46