wok-next diff syslinux/stuff/iso2exe/libdos.c @ rev 17454

syslinux/iso2exe: create a vfat partition in usb bootkey (DOS case only)
author Pascal Bellard <pascal.bellard@slitaz.org>
date Thu Dec 18 11:42:27 2014 +0100 (2014-12-18)
parents 7d300004a3b8
children 6aed6fc5819d
line diff
     1.1 --- a/syslinux/stuff/iso2exe/libdos.c	Thu Dec 13 14:33:27 2012 +0100
     1.2 +++ b/syslinux/stuff/iso2exe/libdos.c	Thu Dec 18 11:42:27 2014 +0100
     1.3 @@ -128,3 +128,58 @@
     1.4  		sbb	ax, ax
     1.5  #endasm
     1.6  }
     1.7 +
     1.8 +void dosshutdown(void)
     1.9 +{
    1.10 +#asm
    1.11 +		push	bp
    1.12 +		push	si
    1.13 +		push	di
    1.14 +		push	ds
    1.15 +		seg	cs
    1.16 +		mov	stack+2, ss
    1.17 +		seg	cs
    1.18 +		mov	stack,sp
    1.19 +		xor	bx, bx
    1.20 +		mov	ds, bx		// ds = 0
    1.21 +		mov	[bx+4], #step
    1.22 +		mov	[bx+6], cs
    1.23 +		pushf
    1.24 +		pop	ax
    1.25 +		or	ax, #0x100	// set TF
    1.26 +		push	ax
    1.27 +		popf
    1.28 +		jmp	far [bx+4*0x19]
    1.29 +stack:
    1.30 +		.long	0
    1.31 +stepagain:
    1.32 +		iret
    1.33 +step:
    1.34 +		push	si
    1.35 +		push	ds
    1.36 +		mov	si, sp
    1.37 +		seg	ss
    1.38 +		lds	si, [si+4]
    1.39 +		cmp	word ptr [si], #0x19CD
    1.40 +		pop	ds
    1.41 +		pop	si
    1.42 +		jne	stepagain
    1.43 +		seg	cs
    1.44 +		lss	sp, stack
    1.45 +		pop	ds
    1.46 +		pop	di
    1.47 +		pop	si
    1.48 +		pop	bp
    1.49 +#endasm
    1.50 +}
    1.51 +
    1.52 +int versiondos;
    1.53 +int dosversion(void)
    1.54 +{
    1.55 +#asm
    1.56 +		mov	ah, #0x30
    1.57 +		int	0x21
    1.58 +		cbw
    1.59 +		mov	_versiondos, ax
    1.60 +#endasm
    1.61 +}