Sponsored Content
Special Forums Hardware Boot Loaders read sectors from disk failed with timeout Post 302552170 by wljackhero on Friday 2nd of September 2011 12:38:58 AM
Old 09-02-2011
read sectors from disk failed with timeout

i'm writing some code to simulate the boot progress after power on
but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem?
my code would be like this:
Code:
[jack@localhost 1]$ cat boot.S
.code16
#define SETUPLEN  4
#define BOOTSEG  0x7C0
#define INITSEG  0x900

.text
a:
mov $BOOTSEG, %ax
mov %ax, %ds
mov $INITSEG, %ax
mov %ax, %es
mov $256, %cx
sub %si, %si
sub %di, %di
rep
movsw

jmp 0x9000+go-a

go:
mov %cs, %ax
mov %ax, %ds
mov %ax, %es
mov %ax, %ss
mov $0xFF00, %sp

load_setup:
mov $0x0000, %dx
mov $0x0002, %cx
mov $0x0200, %bx
mov $0x0200+SETUPLEN, %ax
int $0x13                           //timeout happens here
jnc ok_load_setup
mov $0x0000,%dx
mov $0x0000,%ax
int $0x13
jmp load_setup

ok_load_setup:
mov $0x00, %dl
mov $0x0800, %ax
int $0x13
mov $0x00, %ch
mov %cx, %cs 
mov $INITSEG, %ax
mov %ax, %es

mov $0x03, %ah
xor %bh, %bh
int $0x10

mov $24, %cx
mov $0x0007, %bx
mov msg, %bp
mov $0x1301, %ax
int $0x10

msg:
.byte 13, 10


.org 510
.word 0xaa55

looking forward to replies.
really appreciate any suggestion.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

ksh read timeout

any idea on how to timeout the read statement for ksh? for bash u can use read -t option -t timeout Cause read to time out and return failure if a complete line of input is not read within timeout seconds. This option has ... (2 Replies)
Discussion started by: ashterix
2 Replies

2. Filesystems, Disks and Memory

SCSI disk spare sectors

Is there a way to determine the number of available spare sectors on a disk ? as it may be useful for notifying a user to take a backup of the disk before it runs into a medium error. (6 Replies)
Discussion started by: rednex
6 Replies

3. Shell Programming and Scripting

read from std i/p with timeout within a script

hello every one , this is my first participation in the forum , I hope it'll be a good start within a script I would like to put some code to read i\p from standard i\p using read command if it reads Y it will terminate the script if it reads N it will continue execution , if no i\p is... (2 Replies)
Discussion started by: Blue_shadow
2 Replies

4. Filesystems, Disks and Memory

Smartmontools and fixing Unreadable Disk Sectors

I found a document: Bad block HOWTO for smartmontools My hard drive is Maxtor: root]# fdisk -lu /dev/hda Disk /dev/hda: 81.9 GB, 81964302336 bytes 255 heads, 63 sectors/track, 9964 cylinders, total 160086528 sectors Units = sectors of 1 * 512 = 512 bytes Disk identifier: 0x3f4e3f4d ... (0 Replies)
Discussion started by: justinian
0 Replies

5. Linux

C++ Code to Access Linux Hard Disk Sectors (with a LoopBack Virtual Hard Disk)

Hi all, I'm kind of new to programming in Linux & c/c++. I'm currently writing a FileManager using Ubuntu Linux(10.10) for Learning Purposes. I've got started on this project by creating a loopback device to be used as my virtual hard disk. After creating the loop back hard disk and mounting it... (23 Replies)
Discussion started by: shen747
23 Replies

6. Linux

read sectors from disk failed with timeout

i'm writing some code to simulate the boot progress after power on but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem? my code would be like this: $ cat boot.S .code16 #define SETUPLEN 4... (0 Replies)
Discussion started by: wljackhero
0 Replies

7. UNIX for Advanced & Expert Users

read sectors from disk failed with timeout

i'm writing some code to simulate the boot progress after power on but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem? my code would be like this: $ cat boot.S .code16 #define SETUPLEN 4... (0 Replies)
Discussion started by: wljackhero
0 Replies

8. Shell Programming and Scripting

Use of prtdiag to give information of sectors,cylinders,track of each disk

Hi All, i am trying to get sectors,cylinders,track..etc information of all present disks out of solaris machine using prtvtoc command . Output of ptrvtoc command is as below : bash-3.2# prtvtoc /dev/dsk/c1t0d0s0 * /dev/dsk/c1t0d0s0 partition map * * Dimensions: * 512 bytes/sector... (2 Replies)
Discussion started by: omkar.jadhav
2 Replies

9. Shell Programming and Scripting

Read timeout

I saw several thread for this issue but none addresses my issue. I have tried read -t but the result is read bad options My requirement is 1. Ask for input 2. If input = y or no input in 60 seconds then continue processing else exit fi Kindly consider this urgent. (8 Replies)
Discussion started by: rprasad
8 Replies

10. Solaris

EFI disk labeling / understand the parition table / sectors not continue

Hi all, I have a EFI disk and it is use in zfs pool. partition> p Volume: rpool Current partition table (original): Total disk sectors available: 1172107117 + 16384 (reserved sectors) Part Tag Flag First Sector Size Last Sector 0 usr wm ... (8 Replies)
Discussion started by: javanoob
8 Replies
copt(1) 							z88 Development Kit							   copt(1)

NAME
copt - peephole optimizer SYSNOPIS
copt file ... DESCRIPTION
copt is a general-purpose peephole optimizer. It reads code from its standard input and writes an improved version to its standard output. copy reads the named files for its optimizations, which are encoded as follows: <pattern for input line 1> <pattern for input line 2> ... <pattern for input line n> = <pattern for output line 1> <pattern for output line 2> ... <pattern for output line m> <blank line> Pattern matching uses literal string comparison, with one exception: ``%%'' matches the ``%'' character, and ``%'' followed by a digit matches everything up to the next occurrence of the next pattern character, though all occurrences of %n must denote the same string. For example, the pattern ``%1=%1.'' matches exactly those strings that begin with a string X, followed by a ``='' (the first), followed by a second occurrence of X, followed by a period. In this way, the input/output pattern mov $%1,r%2 mov *r%2,r%2 = mov %1,r%2 commands copt to replace runs like mov $_a,r3 mov *r3,r3 with mov _a,r3 Note that a tab or newline can terminate a %n variable. copt compares each run of input patterns with the current input instruction and its predecessors. If no match is found, it advances to the next input instruction and tries again. Otherwise, it replaces the input instructions with the corresponding output patterns, pattern vari- ables instantiated,and resumes its search with the first instruction of the replacement. copt matches input patterns in reverse order to cascade optimizations without backing up. BUGS
Errors in optimization files are always possible. SEE ALSO
z88dk(1), z88dk-zcc(1), z88dk-z80asm(1), z88dk-appmake(1), z88dk-copt(1). AUTHOR
z88dk was written by Dominic Morris <dom@z88dk.org>, and others. 01 December 2009 copt(1)
All times are GMT -4. The time now is 02:17 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy