SliTaz Repositories

     1.1 --- a/memtest/stuff/bootloader.S	Wed Apr 19 22:14:58 2017 +0200
     1.2 +++ b/memtest/stuff/bootloader.S	Sun May 07 15:59:20 2017 +0100
     1.3 @@ -1,6 +1,10 @@
     1.4 +// Image/zImage boot sector
     1.5 +
     1.6  SYSSEG		= 0x1000
     1.7  INITSEG		= 0x9000
     1.8  SETUPSEG	= 0x9020
     1.9 +setup_sects	= 497
    1.10 +syssize		= 500
    1.11  
    1.12  	.text
    1.13  	.code16
    1.14 @@ -12,144 +16,72 @@
    1.15  
    1.16  /* some extra features */
    1.17  #define EXE_SUPPORT		real mode dos .exe file support
    1.18 -#define CMDLINE	0x9E00
    1.19 -#define HELP			store help message for /? argument
    1.20 -#define TINYSYSTEM		the full file in one segment
    1.21 -#define CHECK_CPU		need a 386+
    1.22 -#define VM2RM			(0x3C+0x19B)
    1.23 +#define CMDLINE		0x9E00
    1.24 +#define VCPI			VCPI 4.0 support
    1.25  #define SHUTDOWNDOS		shutdown DOS services
    1.26  
    1.27  /* some contraints to reduce the size */
    1.28 -//#define FLOPPY_1440K_ONLY	1.44M floppies support only
    1.29 -#define NO_CURSOR_DEFINITION
    1.30 +//#define FLOPPY_1440K_ONLY	1.44M floppies support only	-33
    1.31 +//#define FLOPPY_HAS_2_SIDES	hardcoded heads count to 2	-13
    1.32 +//#define MOVE_MAX_SYSSIZE	always memcpy 512Kb		-2
    1.33 +//#define NO_CURSOR_DEFINITION					-8
    1.34 +//#define NO_CMDLINE_SHRINK	remove heading spaces ?		-6
    1.35 +//#define NO_DOTS		show progression dots ?		-8
    1.36  
    1.37  #ifdef EXE_SUPPORT
    1.38  #define EXEADRS(x)	(x+0xE0)
    1.39 -stacktop	= 0x9E00		# in 0x8000 .. 0xA000
    1.40 -	decw	%bp			// Magic number: MZ
    1.41 -	popw	%dx
    1.42 -	jmp	startz			// Bytes on last page of file
    1.43 -	.word	(CODESZ+511)/512	// Pages in file
    1.44 -	.word	0			// Relocations
    1.45 -	.word	(end_header-_start)/16	// Size of header in paragraphs
    1.46 -	.word	4096			// Minimum extra paragraphs needed
    1.47 -	.word	-1			// Maximum extra paragraphs needed
    1.48 -	.word	(CODESZ+15)/16		// Initial (relative) SS value
    1.49 -	.word	stacktop		// Initial SP value
    1.50 -	.word	0			// Checksum
    1.51 -	.word	EXEADRS(comstart)	// Initial IP value
    1.52 -	.word	0xFFF0			// Initial (relative) CS value
    1.53 -//	.word	0x001C			// File address of relocation table
    1.54 -//	.word	0,0,0			// Overlay number
    1.55 -	.ascii  "SliTaz"
    1.56 -startz:
    1.57 -	jmp	start
    1.58 -end_header:
    1.59 -comstart:
    1.60 -	cld				# assume nothing
    1.61 -#ifdef CMDLINE
    1.62 -	movw	$stacktop, %di		# cmdline offset at 0x22
    1.63 -#else
    1.64 -#undef HELP
    1.65 -#endif
    1.66 -	pushw	$INITSEG
    1.67 -	popw	%es
    1.68 -#ifdef CMDLINE
    1.69 -	movw	$0x80, %si
    1.70 -	lodsb
    1.71 -	cbw
    1.72 -	xchgw	%ax, %cx
    1.73 -	jcxz	nocmdline
    1.74 -	movw	$0xA33F, 0x7F(%si)
    1.75 -skipspace:
    1.76 -	lodsb
    1.77 -	cmpb	$0x20, %al
    1.78 -	je	skipspace
    1.79 -	decw	%si
    1.80 -	rep
    1.81 -	  movsb
    1.82 -# ifdef HELP
    1.83 -# define PUTS
    1.84 -	movw	$EXEADRS(helpmsg), %si
    1.85 -	cmpb	$'/'+1, %al
    1.86 -#  ifdef CHECK_CPU
    1.87 -	js	jsputs
    1.88 -#  else
    1.89 -	js	puts
    1.90 -#  endif
    1.91 -# endif
    1.92 -nocmdline:
    1.93 -#endif
    1.94 -	movw	$SYSSEG, %ax
    1.95 -	movb	$(512-(end_header-_start))/2, %cl
    1.96 -	movw	$end_header, %di
    1.97 -#ifdef CHECK_CPU
    1.98 -#define PUTS
    1.99 -	movw	$EXEADRS(realmode_expected), %si
   1.100 -	//movb	setup_sects-realmode_expected(%si), %ch
   1.101 -	.byte	0x8A, 0x6C, setup_sects-realmode_expected
   1.102 -		// bits  15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
   1.103 -		// flags  0 NT  IOPL OF DF IF TF SF ZF  0 AF  0 PF  1 CF
   1.104 -	//movb	$0x10, %ah	// DF = IF = TF = 0
   1.105 -	pushw	%ax
   1.106 -	popfw			// < 286 : flags[12..15] are forced 1
   1.107 -	pushfw			// = 286 : flags[12..15] are forced 0
   1.108 -	popw	%dx		// > 286 : only flags[15] is forced 0
   1.109 -	cmpb	%ah, %dh	// test Fx and 0x cases: S= < 386, C= < 286
   1.110 -jsputs:
   1.111 -	js	puts		// S= not 386+
   1.112 -	smsww	%dx
   1.113 -	shrw	$1, %dx
   1.114 -# ifdef VM2RM
   1.115 -	jnc	isrm
   1.116 -	push	%cs
   1.117 -	call	VM2RM
   1.118 -isrm:
   1.119 -# else
   1.120 -	jc	puts		// protected mode: vm86
   1.121 -# endif
   1.122 -#else
   1.123 -	movb	EXEADRS(setup_sects), %ch
   1.124 -#endif
   1.125 -	movw	$0x100, %si
   1.126 -	rep
   1.127 -	  movsw
   1.128 -	movw	%ds, %bx
   1.129 -	pushw	%es
   1.130 -	popw	%ss
   1.131 -#ifndef SHUTDOWNDOS
   1.132 -	ljmp	$INITSEG, $movesys
   1.133 -#else
   1.134 -	pushaw
   1.135 -	movw	%cx, %ds		# %ds = 0
   1.136 -	movw	$4, %si
   1.137 +#define FLAT20(x)	(x+16*INITSEG)
   1.138 +
   1.139 +.macro	trace_int19
   1.140 +	pushl	$4
   1.141 +	popw	%si
   1.142 +	popw	%ds
   1.143  	pushl	(%si)
   1.144 -	movw	$step19, (%si)
   1.145 -	movw	%es, 2(%si)
   1.146 +	movl	$step19+(INITSEG<<16), (%si)
   1.147  	pushfw
   1.148  	popw	%ax
   1.149  	incb	%ah			# set TF
   1.150  	pushw	%ax
   1.151  	popfw
   1.152  	ljmp	*4*0x19-4(%si)
   1.153 +.endm
   1.154 +
   1.155 +stacktop	= 0x9E00		# in 0x8000 .. 0xA000
   1.156 +	decw	%bp			// Magic number: MZ
   1.157 +	popw	%dx
   1.158 +	jmp	start			// Bytes on last page of file
   1.159 +	.word	(CODESZ+511)/512	// Pages in file			INSTALLER
   1.160 +	.word	0			// Relocations
   1.161 +	.word	(end_header-_start)/16	// Size of header in paragraphs
   1.162 +	.word	(CODESZ+stacktop+15)/16	// Minimum extra paragraphs needed	INSTALLER
   1.163 +	.word	-1			// Maximum extra paragraphs needed
   1.164 +	.word	(CODESZ+15)/16		// Initial (relative) SS value		INSTALLER
   1.165 +	.word	stacktop		// Initial SP value
   1.166 +	.word	0			// Checksum				INSTALLER?
   1.167 +	.word	EXEADRS(comstart)	// Initial IP value
   1.168 +	.word	0xFFF0			// Initial (relative) CS value
   1.169 +//	.word	0x001C			// File address of relocation table
   1.170 +//	.word	0,0,0			// Overlay number
   1.171  #endif
   1.172  start:
   1.173 -	pushw	%dx
   1.174 -#else
   1.175 -#undef HELP
   1.176 -#undef CMDLINE
   1.177 -#undef CHECK_CPU
   1.178 -#endif
   1.179  	cld				# assume nothing
   1.180 -stacktop	= 0x9E00		# in 0x8000 .. 0xA000
   1.181 +	xorw	%ax, %ax		# %ax = 0
   1.182  zeroed		= 12			# zeroed registers
   1.183 -	movw	$stacktop-12-zeroed, %di	# stacktop is an arbitrary value >=
   1.184 +stacktop	= 0x9E00		# in 0x8000 .. 0xA000 (+zeroed+12)
   1.185 +	pushw	$INITSEG
   1.186 +	popw	%ss			# %ss contain INITSEG
   1.187 +	pushw	%ss
   1.188 +end_header:
   1.189 +	popw	%es			# %es = %ss = INITSEG
   1.190 +					# cmdline offset at 0x22
   1.191 +	movw	$stacktop, %di		# stacktop is an arbitrary value >=
   1.192  					# length of bootsect + length of
   1.193  					# setup + room for stack;
   1.194  					# 12 is disk parm size.
   1.195 -	pushw	$INITSEG
   1.196 -	popw	%ss			# %ss contain INITSEG
   1.197  	movw	%di, %sp		# put stack at INITSEG:stacktop-...
   1.198 +#ifdef EXE_SUPPORT
   1.199 +	cwd				# %dx = 0
   1.200 +#endif
   1.201  
   1.202  # Many BIOS's default disk parameter tables will not recognize
   1.203  # multi-sector reads beyond the maximum sector number specified
   1.204 @@ -163,12 +95,6 @@
   1.205  #
   1.206  # High doesn't hurt.  Low does.  Let's use the max: 63
   1.207  
   1.208 -	pushw	%ss
   1.209 -	popw	%es			# %es = %ss = INITSEG
   1.210 -	xorw	%ax, %ax		# %ax = 0
   1.211 -#ifdef EXE_SUPPORT
   1.212 -	cwd				# %dx = 0
   1.213 -#endif
   1.214  	movw	$zeroed/2, %cx		# clear gdt + offset, %ds, limits
   1.215  	rep				# don't worry about cld
   1.216  	stosw				# already done above
   1.217 @@ -200,7 +126,9 @@
   1.218  # no 64kB boundaries are crossed. We try to load it as fast as
   1.219  # possible, loading whole tracks whenever we can.
   1.220  
   1.221 +#ifndef NO_DOTS
   1.222  	popw	%bx			# clear %bx
   1.223 +#endif
   1.224  	movw	syssize, %di
   1.225  	decw	%di
   1.226  	shrw	$9-4, %di
   1.227 @@ -223,16 +151,6 @@
   1.228  jmp_setup:
   1.229  	ljmp	$SETUPSEG, $0
   1.230  
   1.231 -#ifdef PUTS
   1.232 -#define PUTC
   1.233 -putslp:
   1.234 -	call	putc
   1.235 -puts:
   1.236 -	lodsb
   1.237 -	orb	%al, %al
   1.238 -	jne	putslp	
   1.239 -	int	$0x20			// dos exit
   1.240 -#endif
   1.241  #ifdef EXE_SUPPORT
   1.242  #ifdef SHUTDOWNDOS
   1.243  doiret:
   1.244 @@ -254,30 +172,9 @@
   1.245  	popl	4(%si)
   1.246  	popaw
   1.247  #endif
   1.248 -movesys:				// %ax = SYSSEG
   1.249 -#ifdef TINYSYSTEM
   1.250 -	movw	%si, %cx
   1.251 -	negw	%cx
   1.252 -	xorw	%di, %di
   1.253 -	movw	%ax, %es
   1.254 -	movw	%si, %dx
   1.255 -	shrw	$4, %dx
   1.256 -# ifdef SHUTDOWNDOS
   1.257 -	movw	%bx, %ds
   1.258 -# endif
   1.259 -	addw	%dx, %bx
   1.260 -	subw	%ax, %bx
   1.261 -	jnc	forward
   1.262 -	addw	%cx, %di
   1.263 -	addw	%cx, %si
   1.264 -	incw	%cx
   1.265 -	std
   1.266 -forward:
   1.267 -	rep
   1.268 -	  movsb
   1.269 -	cld
   1.270 -#else
   1.271 -	movw	%cs:syssize, %bp
   1.272 +movesys:				// %ax = SYSSEG, %bx = DS, %si
   1.273 +	//movw	%cs:syssize, %bp
   1.274 +	movw	$0x8000, %bp
   1.275  	shrw	$4, %si
   1.276  	addw	%si, %bx
   1.277  	subw	%ax, %bx
   1.278 @@ -298,7 +195,6 @@
   1.279  	  movsw
   1.280  	decw	%bp
   1.281  	jns	forward
   1.282 -#endif
   1.283  #ifndef NO_CURSOR_DEFINITION
   1.284  	movb	$1, %ah
   1.285  	movb	$0, %bh
   1.286 @@ -308,17 +204,87 @@
   1.287  	pushw	%ss
   1.288  	popw	%ds
   1.289  	jmp	jmp_setup
   1.290 +comstart:
   1.291 +	cld				# assume nothing
   1.292 +	pushw	$INITSEG
   1.293 +	popw	%es
   1.294 +#ifdef CMDLINE
   1.295 +	movw	%sp, %di
   1.296 +	movw	$0x80, %si
   1.297 +	lodsb
   1.298 +	cbw
   1.299 +	xchgw	%ax, %cx
   1.300 +	jcxz	nocmdline
   1.301 +	movw	$0xA33F, 0x7F(%si)
   1.302 +# ifndef NO_CMDLINE_SHRINK
   1.303 +skipspace:
   1.304 +	lodsb
   1.305 +	cmpb	$0x20, %al
   1.306 +	je	skipspace
   1.307 +	decw	%si
   1.308 +# endif
   1.309 +	rep
   1.310 +	  movsb
   1.311 +nocmdline:
   1.312  #endif
   1.313 -putcdot:
   1.314 -#ifdef PUTC
   1.315 -	movb	$0x2E, %al
   1.316 -putc:
   1.317 -	movb	$0xE, %ah
   1.318 -	movw	$7, %bx
   1.319 -	int	$0x10
   1.320 +	movb	$(512-(end_header-_start))/2, %cl
   1.321 +	movb	EXEADRS(setup_sects), %ch
   1.322 +	movw	$0x100, %si
   1.323 +	movw	$end_header, %di
   1.324 +	rep
   1.325 +	  movsw
   1.326 +	movw	$SYSSEG, %ax
   1.327 +	movw	%ds, %bx
   1.328 +	pushw	%es
   1.329 +	popw	%ss
   1.330 +#ifndef SHUTDOWNDOS
   1.331 +	pushw	%es
   1.332 +	pushw	$movesys
   1.333  #endif
   1.334 -	ret
   1.335 -
   1.336 +#ifdef VCPI
   1.337 +# ifndef SHUTDOWNDOS
   1.338 +	pushw	%es
   1.339 +	pushw	%ds
   1.340 +# endif
   1.341 +	pushaw
   1.342 +	smsww	%ax
   1.343 +	andb	$1, %al
   1.344 +	je	isrm
   1.345 +	movw	$EXEADRS(gdt_vcpi),%si
   1.346 +	pushw	$pagebuf/16
   1.347 +	popw	%es
   1.348 +	movl	$pagebuf+3,%es:0x1000
   1.349 +	xorw	%di,%di
   1.350 +call_vcpi:
   1.351 +	movb	$0xDE,%ah	// DE01, EBX = getiface(DS:SI, ES:DI)
   1.352 +	int	$0x67
   1.353 +	movl	$FLAT20(sw2pm_params),%esi
   1.354 +	movb	$0x0C,%al	// DE0C switchpm(ESI)
   1.355 +	cli
   1.356 +	jmp	call_vcpi
   1.357 +pm_code:
   1.358 +	movl	%cr0,%eax
   1.359 +	andl	$0x7FFFFFFE,%eax
   1.360 +	movl	%eax,%cr0
   1.361 +	movl	%eax,%cr3
   1.362 +isrm:
   1.363 +# ifdef SHUTDOWNDOS
   1.364 +	trace_int19
   1.365 +# else
   1.366 +	lssw	%cs:EXEADRS(saved_ss_sp),%sp	
   1.367 +	popaw
   1.368 +	popw	%ds
   1.369 +	popw	%es
   1.370 +	retf
   1.371 +# endif
   1.372 +#else
   1.373 +# ifdef SHUTDOWNDOS
   1.374 +	pushaw
   1.375 +	trace_int19
   1.376 +# endif
   1.377 +	retf
   1.378 +#endif
   1.379 +#endif
   1.380  
   1.381  # read_sectors reads %di sectors into %es:0 buffer.
   1.382  # %es:0 is updated to the next memory location.
   1.383 @@ -328,13 +294,21 @@
   1.384  # Assume no error on first track.
   1.385  
   1.386  #ifdef FLOPPY_1440K_ONLY
   1.387 -#define FLOPPY_HEADS		2	/* 2 heads */
   1.388 +#define FLOPPY_HAS_2_SIDES	hardcore heads count to 2
   1.389  #define FLOPPY_SECTORS		18	/* 18 sectors */
   1.390  #else
   1.391  #define FLOPPY_HEADS		2	/* 2 heads minimum */
   1.392  #define FLOPPY_SECTORS		9	/* 9 sectors minimum */
   1.393  #endif
   1.394  
   1.395 +return:
   1.396 +#ifndef NO_DOTS
   1.397 +	movw	$0xE2E,%ax
   1.398 +	movb	$7,%bl
   1.399 +	int	$0x10
   1.400 +#endif
   1.401 +	ret
   1.402 +
   1.403  check_limits:
   1.404  #ifndef FLOPPY_1440K_ONLY
   1.405  	popw	%dx
   1.406 @@ -344,6 +318,7 @@
   1.407  #endif
   1.408          cmpb    %al, %cl		# max sector known ?
   1.409          ja	next_head		#   no -> store it
   1.410 +#ifndef FLOPPY_HAS_2_SIDES
   1.411  check_head:
   1.412  #ifdef FLOPPY_HEADS
   1.413  	cmpb	$FLOPPY_HEADS, %dh	# 2 heads minimum
   1.414 @@ -353,6 +328,7 @@
   1.415          ja	next_cylinder		#   no -> store it
   1.416  check_cylinder:
   1.417  #endif
   1.418 +#endif
   1.419  	pushaw
   1.420  #ifndef FLOPPY_1440K_ONLY
   1.421  	cbw				# %ah = 0
   1.422 @@ -399,9 +375,6 @@
   1.423  	popw	%dx
   1.424  	subw	%dx,%di			# update sector counter
   1.425  	popw	%dx
   1.426 -read_sectorsCX:
   1.427 -	movw	%cx, %es		# next location
   1.428 -	jz	putcdot
   1.429  #else
   1.430  	addw	%ax,%cx			# next sector
   1.431  	movw	%cx, %gs
   1.432 @@ -411,10 +384,10 @@
   1.433  	addw	%ax, %cx
   1.434  	popw	%ax
   1.435  	subw	%ax,%di			# update sector counter
   1.436 +#endif
   1.437  read_sectorsCX:
   1.438  	movw	%cx, %es		# next location
   1.439 -	jz	putcdot
   1.440 -#endif
   1.441 +	jz	return
   1.442  read_sectors:
   1.443  	movw	%gs, %cx
   1.444  #ifndef FLOPPY_1440K_ONLY
   1.445 @@ -431,29 +404,26 @@
   1.446          cmpb    $FLOPPY_SECTORS+1,%cl	# reach sector limit ?
   1.447          jne     bdendlp
   1.448  #endif
   1.449 +        movb    $1,%cl			# first sector
   1.450 +#ifndef FLOPPY_HAS_2_SIDES
   1.451          incb    %dh			# next head
   1.452 -        movb    $1,%cl			# first sector
   1.453 -#ifndef FLOPPY_1440K_ONLY
   1.454          cmpb    %ah, %dh		# reach head limit ?
   1.455          jne     bdendlp
   1.456  next_cylinder:
   1.457          movb    %dh,%ah
   1.458 +        movb    $0,%dh			# first head
   1.459  #else
   1.460 -        cmpb    %cl,%dh			# reach head limit ?
   1.461 -        je	bdendlp
   1.462 +        xorb    %cl,%dh			# next head
   1.463 +        jne	bdendlp			# reach head limit ?
   1.464  #endif
   1.465  # NOTE : support 256 cylinders max
   1.466          incb    %ch			# next cylinder
   1.467 -        movb    $0,%dh			# first head
   1.468  read_first_sectors:
   1.469  bdendlp:
   1.470          jmp	read_sectorslp
   1.471  
   1.472 -#ifdef VM2RM
   1.473 -pagebuf		=	0x96000
   1.474 -saved_ss_sp	=	gdt_abs-44
   1.475 -saved_sp	=	gdt_abs-44
   1.476 -saved_ss	=	gdt_abs-42
   1.477 +#ifdef VCPI
   1.478 +pagebuf		=	0x98000
   1.479  tss		=	gdt_abs-40
   1.480  gdt		=	gdt_abs-32
   1.481  gdt_null	=	gdt_abs-32
   1.482 @@ -461,39 +431,38 @@
   1.483  gdt_vcpi2	=	gdt_abs-16
   1.484  gdt_vcpi3	=	gdt_abs-8
   1.485  gdt_abs:
   1.486 -	.word	0xFFFF,0
   1.487 -	.byte	0,0x92,0xCF,0
   1.488 +	.word	0xFFFF
   1.489 +	.long	0x92000000
   1.490 +	.byte	0xCF,0
   1.491  gdt_code:
   1.492  	.word	0xFFFF
   1.493  gdt_code_base:
   1.494 -	.long	0x9A000000
   1.495 +	.long	0x9A000000+FLAT20(0)
   1.496  	.byte	0x8F,0
   1.497  gdt_tss:
   1.498  	.word	0x00FF
   1.499  gdt_tss_base:
   1.500 -	.long	0x89000000+EXEADRS(tss)
   1.501 +	.long	0x89000000+FLAT20(tss)
   1.502  	.byte	0,0
   1.503  gdtr:
   1.504  gdt_lim:
   1.505  	.word	0xFFFF
   1.506  gdt_base:
   1.507 -	.long	EXEADRS(gdt)
   1.508 +	.long	FLAT20(gdt)
   1.509  sw2pm_params:
   1.510  sw2pm_cr3:
   1.511  	.long	pagebuf+0x1000
   1.512  sw2pm_gdtr_ptr:
   1.513 -	.long	EXEADRS(gdtr)
   1.514 +	.long	FLAT20(gdtr)
   1.515  sw2pm_idtr_ptr:
   1.516 -	.long	EXEADRS(idtr)
   1.517 +	.long	FLAT20(idtr)
   1.518  sw2pm_ldtr:
   1.519  	.word	0
   1.520  sw2pm_tr:
   1.521  SEL_TSS		= gdt_tss-gdt_null
   1.522  	.word	SEL_TSS
   1.523  sw2pm_jumpaddr:
   1.524 -#define SETUPEXEADRS(x)	(x+0x2E0)
   1.525 -pm_code		=	0x0084
   1.526 -	.long	SETUPEXEADRS(pm_code)
   1.527 +	.long	pm_code
   1.528  SEL_CODE	= gdt_code-gdt_null
   1.529  	.word	SEL_CODE
   1.530  idtr:
   1.531 @@ -501,31 +470,13 @@
   1.532  	.word	0x03FF
   1.533  idt_base:
   1.534  	.long	0
   1.535 +# ifndef SHUTDOWNDOS
   1.536 +saved_ss_sp:
   1.537 +	.word	stacktop-4-16-4,INITSEG
   1.538 +# endif
   1.539  #endif
   1.540 -#ifdef HELP
   1.541 +
   1.542  helpmsg:
   1.543 -	.ascii	"No help."
   1.544 -	.byte	13,10
   1.545 -	.byte	0
   1.546 -#endif
   1.547 -#ifdef CHECK_CPU
   1.548 -# if VM2RM
   1.549 -	.org	484
   1.550 -realmode_expected:
   1.551 +	.ascii	"SliTaz zImage boot"
   1.552 +	.org 497
   1.553  helpend:
   1.554 -	.ascii	"386+ only."
   1.555 -# else
   1.556 -	.org	475
   1.557 -realmode_expected:
   1.558 -helpend:
   1.559 -	.ascii	"386 real mode only."
   1.560 -# endif
   1.561 -	.byte	13,10,0
   1.562 -#endif
   1.563 -	.org	497
   1.564 -setup_sects:
   1.565 -	.byte	0
   1.566 -	.org	500
   1.567 -syssize:
   1.568 -	.word	0
   1.569 -