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hello friends,
i am trying to deploy my OS kernel in bochs on windows vista platform. I have a virtual floppy drive (VFD), and have an image file for the OS. The image file runs fine on VMWare, but as i want to get debugging info for the kernel, i am switching to bochs.
my bochsrc.txt file is :
[code]# configuration file generated by Bochs
floppya: 1_44="1.44", status=inserted
# no floppyb
ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
ata1: enabled=0
ata2: enabled=0
ata3: enabled=0
romimage: file=../BIOS-bochs-latest, address=0xf0000
vgaromimage: ../VGABIOS-lgpl-latest
megs: 32
parport1: enabled=1, file=""
com1: enabled=1, dev=""
# no sb16
boot: floppy
floppy_bootsig_check: disabled=0
vga_update_interval: 30000
keyboard_serial_delay: 20000
keyboard_paste_delay: 100000
floppy_command_delay: 50000
ips: 500000
pit: realtime=0
text_snapshot_check: 0
mouse: enabled=0
private_colormap: enabled=0
i440fxsupport: enabled=0
time0: 0
# no ne2k
newharddrivesupport: enabled=1
# no loader
log: bochsout.txt
logprefix: %t%e%d
debugger_log: -
panic: action=fatal
error: action=report
info: action=report
debug: action=ignore
pass: action=fatal
keyboard_mapping: enabled=0, map=
keyboard_type: mf
user_shortcut: keys=none
config_interface: textconfig
display_library: win32[/code]

I get the following log file when i try to simulate the os:
[code]00000000000i[MEM0 ] allocated memory at 01480020. after alignment, vector=01481000
00000000000i[MEM0 ] 32.00MB
00000000000i[MEM0 ] rom at 0xf0000/65536 ('../BIOS-bochs-latest')
00000000000i[MEM0 ] rom at 0xc0000/27392 ('../VGABIOS-lgpl-latest')
00000000000i[CMOS ] Setting initial clock to: Sun Feb 10 03:45:45 2008 (time0=1202595345)
00000000000i[DMA ] channel 4 used by cascade
00000000000i[DMA ] channel 2 used by Floppy Drive
00000000000i[FDD ] tried to open 1.44 read/write: No such file or directory
00000000000i[FDD ] tried to open 1.44 read only: No such file or directory
00000000000i[FDD ] fd0: '1.44' ro=1, h=0,t=0,spt=0
00000000000i[VGA ] interval=30000
00000000000i[VGA ] VBE Bochs Display Extension Enabled
00000000000i[ ] init_mem of 'harddrv' plugin device by virtual method
00000000000i[ ] init_mem of 'keyboard' plugin device by virtual method
00000000000i[ ] init_mem of 'serial' plugin device by virtual method
00000000000i[ ] init_mem of 'parallel' plugin device by virtual method
00000000000i[ ] init_dev of 'harddrv' plugin device by virtual method
00000000000i[HD ] Boot device will be 'a'
00000000000i[HD ] Floppy boot signature check is enabled
00000000000i[ ] init_dev of 'keyboard' plugin device by virtual method
00000000000i[KBD ] will paste characters every 1000 keyboard ticks
00000000000i[ ] init_dev of 'serial' plugin device by virtual method
00000000000i[SER ] com1 at 0x3f8/8 irq 4
00000000000i[ ] init_dev of 'parallel' plugin device by virtual method
00000000000i[PAR ] parallel port 1 at 0x378
00000000000i[ ] reset of 'harddrv' plugin device by virtual method
00000000000i[ ] reset of 'keyboard' plugin device by virtual method
00000000000i[ ] reset of 'serial' plugin device by virtual method
00000000000i[ ] reset of 'parallel' plugin device by virtual method
00000004256i[BIOS ] rombios.c,v 1.85.2.1 2003/01/16 21:58:42 cbothamy Exp $
00000330043i[KBD ] reset-disable command received
00000353372i[VBIOS] VGABios $Id: vgabios.c,v 1.20 2002/10/20 15:12:33 vruppert Exp $
00000353603i[VGA ] VBE known Display Interface b0c1
00000353688i[VGA ] VBE known Display Interface b0c0
00000356633i[VBIOS] VBE Bios $Id: vbe.c,v 1.22 2002/09/19 17:03:21 cbothamy Exp $
00000356748i[VGA ] VBE known Display Interface b0c1
00000356832i[VGA ] VBE disabling
00000693509i[VGA ] VBE known Display Interface b0c1
00000784311e[HD ] device set to 0 which does not exist
00000784604e[HD ] device set to 1 which does not exist
00000814274i[FDD ] attempt to read/write sector 1, sectors/track=0 with media not present
00000835300i[BIOS ] Boot from Floppy 0 failed
00000865115i[BIOS ] FATAL: Could not read the boot disk
00000866518p[BIOS ] >>PANIC<< BIOS panic at rombios.c, line 1563
00000866518i[SYS ] Last time is 1202595346
00000866518i[CPU ] real mode
00000866518i[CPU ] CS.d_b = 16 bit
00000866518i[CPU ] SS.d_b = 16 bit
00000866518i[CPU ] | EAX=0003061b EBX=0000db2b ECX=00030001 EDX=00000401
00000866518i[CPU ] | ESP=0000ffc2 EBP=0000ffd4 ESI=00006322 EDI=00006348
00000866518i[CPU ] | IOPL=0 NV UP DI PL NZ NA PO NC
00000866518i[CPU ] | SEG selector base limit G D
00000866518i[CPU ] | SEG sltr(index|ti|rpl) base limit G D
00000866518i[CPU ] | DS:0000( 0000| 0| 0) 00000000 0000ffff 0 0
00000866518i[CPU ] | ES:07c0( 0000| 0| 0) 00007c00 0000ffff 0 0
00000866518i[CPU ] | FS:0000( 0000| 0| 0) 00000000 0000ffff 0 0
00000866518i[CPU ] | GS:0000( 0000| 0| 0) 00000000 0000ffff 0 0
00000866518i[CPU ] | SS:0000( 0000| 0| 0) 00000000 0000ffff 0 0
00000866518i[CPU ] | CS:f000( 0000| 0| 0) 000f0000 0000ffff 0 0
00000866518i[CPU ] | EIP=0000089a (00000899)
00000866518i[CPU ] | CR0=0x60000010 CR1=0x00000000 CR2=0x00000000
00000866518i[CPU ] | CR3=0x00000000 CR4=0x00000000
00000866518i[ ] restoring default signal behavior
00000866518i[CTRL ] quit_sim called with exit code 1
[/code]

could you please tell me whats going wrong ... thanks ...

1: Will you please enable BBcode
2: RTFM - you'll want an additional argument for the floppy line

hey Its working !!!
i had to save the floppy image with the filename 1.44 in the same folder my bochsrc.txt was, and then its all running fine.
can i get realtime debugging info in bochs, like the value of the various registers while my os is running.
i have to look at the bochlog file, and it shows the info of the CPU registers only after i power off the OS.

You need the bochs version with the debugger compiled in. It is called bochsdbg.exe on windows iirc. After starting you will then see the debugger commandline. Read the bochs manual on how to use it.