Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 8:44 pm
bad news
still have my floppy disk problem
Code: Select all
xor ax,ax
mov ds,ax
mov es,ax
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Patricknet Might end- i need help ERGENT
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Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 8:46 pm
Post the code you're testing. I'll try it out on bochs and see if your problem exists there.
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 8:52 pm
here you go the code
I also uploaded a file of boot.asm
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[bits 16]
[org 0x7c00]
jmp Start
; Message Strap
msg db "Patricknet - Version: Beta 0.2 (15/9/2008)",13,10,0
Start:
xor ax,ax
mov dx,ax
mov es,ax
mov si,msg
call pd
pd:
mov ah,0x0E
mov bh,0x00
mov bx,0x07
pdc:
lodsb
or al,al
jz short pdend
int 0x10
jmp pdc
pdend:
retn ; return to caller
padding TIMEs 510-($-$$) db 0
;Flag Point Form Bios To Notice That This A Patricknet Boot Sector Is Vaild By Signature
Dw 0AA55h
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 8:59 pm
I'd get a new test computer if I were you. 
Well, it did work on bochs!
Well, it did work on bochs!
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 9:01 pm
Hi,
Um.... What is meant to happen after the "call pd" instruction?
At the moment, it'll return from the "pd" routine just after the "call pd" instruction and keep executing. This means it'll execute the "pd" routine a second time (because that's what comes after the "call pd" instruction), and SI will be pointing to the byte after the "msg" string so it'll display your code as ASCII until it finds a second zero byte. When it does find that second zero byte the "pd" routine will try to return, but it wasn't actually called so there's no return address on the stack. At this point it might crash, lockup or do anything else.
You might want to insert something like this after the "call pd" instruction:
It'd also be good to setup a stack (instead of assuming the stack the BIOS left behind is sane):
Cheers,
Brendan
Um.... What is meant to happen after the "call pd" instruction?
At the moment, it'll return from the "pd" routine just after the "call pd" instruction and keep executing. This means it'll execute the "pd" routine a second time (because that's what comes after the "call pd" instruction), and SI will be pointing to the byte after the "msg" string so it'll display your code as ASCII until it finds a second zero byte. When it does find that second zero byte the "pd" routine will try to return, but it wasn't actually called so there's no return address on the stack. At this point it might crash, lockup or do anything else.
You might want to insert something like this after the "call pd" instruction:
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.die: hlt
jmp .dieCode: Select all
xor ax,ax
cli
mov ss,ax
mov sp,0x7C00
stiCheers,
Brendan
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 9:03 pm
Thanks. I use 3 computers to make it 1 is write and compile 1 used to write to floppy because my main computer doesn't have a floppy disk drive and the other to test it. By the way could it be that it only work emulated not on real hardware? that could be a possible. Plus how could i see it for my self on bochs?
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 9:17 pm
using bochs 2.0(the version I use)...
Make a new file. Lets just say you saved it as "C:\etc\script.txt". Put this in the file:
NOTE: you WILL need to add to this when your OS progresses.
now, using the command line, do this:
...and it should work!
Make a new file. Lets just say you saved it as "C:\etc\script.txt". Put this in the file:
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romimage: file=BIOS-bochs-latest, address=0xf0000
vgaromimage: VGABIOS-lgpl-latest
floppya: 1_44=a:, status=inserted
log: bochs_log.log
error: action=report
info: action=report
megs: 32
now, using the command line, do this:
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bochs -f C:\etc\script.txt -q
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 9:21 pm
where does the disk image come into can you give me a copy that you used. I mean they floppy disk image and how will you add that into the script
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 9:45 pm
well...
if you put the floppy disk with Patricknet it into the computer with bochs on it, the script should work just like that (and run Patricknet, for that matter).
if you put the floppy disk with Patricknet it into the computer with bochs on it, the script should work just like that (and run Patricknet, for that matter).
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 10:00 pm
can you please give the link of the program just incase if want to do it from a with floppy image so other people can use it so i don't have to swap machines.
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 10:10 pm
plus nothing shows in bochs when i have the floppy disk
Re: Patricknet Might end- i need help ERGENT
Posted: Sun Sep 14, 2008 10:37 pm
This might be a better bochs tutorial than my own. Use it instead.