[ros-kernel] RE: Re: RE: Re: Old reactos

[Jurgen V. G. <jur...@st...>]

I am very sorry, I also had to change the .exit to exit because
otherwise nasm wouldn't build loadros.

And still the system reboots, but I can now put the loop after next:
	mov	eax,cr0
	or	eax,0x10001
	mov	cr0,eax
	jmp	next
next:
break:
	jmp break
	;;
	;; NOTE: This must be position independant (no references to
	;; non absolute variables)
	;;

	;;
	;; Initalize segment registers
	;;
	mov	ax,KERNEL_DS
	mov	ds,ax
	mov	ss,ax
	mov	es,ax
	mov	fs,ax
	mov	gs,ax


If I put the break after mov gs, ax though, the system reboots.


Jurgen

-----Original Message-----
From: Casper Hornstrup [mailto:ch...@us...] 
Sent: Wednesday, October 10, 2001 15:56
To: ros...@re...
Subject: [ros-kernel] Re: RE: Re: Old reactos


On Wednesday 10 October 2001 00:40, Jurgen Van Gael wrote:
> When I use the loop in loadros.asm, I get these results:
>
> If I put the break here:
>
> 		;;
> 		;; Enter pmode and clear prefetch queue
> 		;;
> 		mov	eax,cr0
> 		or	eax,0x10001
> 		mov	cr0,eax
> 	.break:
> 		jmp .break
> 		jmp	.next
> 	.next:
>
> Then the system freezes with a blue screen
>
> When I put the loop after jmp .next, the system reboots.
>
> Am I right we are talking pmode right now. Could it be that the gdt or

> idt is not setup properly?

Try changing:

jmp	.next
.next:


to:

jmp	next
next:

IIRC, it should be a far jump to clear the prefetch queue.

- Casper

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