wok annotate linux/stuff/linux-header-2.6.37.u @ rev 11514

kino: update bdeps
author Pascal Bellard <pascal.bellard@slitaz.org>
date Fri Dec 23 10:13:02 2011 +0100 (2011-12-23)
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rev   line source
slaxemulator@8085 1 --- linux-2.6.30.6/arch/x86/boot/header.S
slaxemulator@8085 2 +++ linux-2.6.30.6/arch/x86/boot/header.S
slaxemulator@8085 3 @@ -6,7 +6,7 @@
slaxemulator@8085 4 * Based on bootsect.S and setup.S
slaxemulator@8085 5 * modified by more people than can be counted
slaxemulator@8085 6 *
slaxemulator@8085 7 - * Rewritten as a common file by H. Peter Anvin (Apr 2007)
slaxemulator@8085 8 + * Rewritten Pascal Bellard (Nov 2009)
slaxemulator@8085 9 *
slaxemulator@8085 10 * BIG FAT NOTE: We're in real mode using 64k segments. Therefore segment
slaxemulator@8085 11 * addresses must be multiplied by 16 to obtain their respective linear
slaxemulator@8085 12 @@ -27,6 +27,8 @@
slaxemulator@8085 13
slaxemulator@8085 14 BOOTSEG = 0x07C0 /* original address of boot-sector */
slaxemulator@8085 15 SYSSEG = 0x1000 /* historical load address >> 4 */
slaxemulator@8085 16 +INITSEG = 0x9000 /* boot address >> 4 */
slaxemulator@8085 17 +SETUPSEG = 0x9020 /* setup address >> 4 */
slaxemulator@8085 18
slaxemulator@8085 19 #ifndef SVGA_MODE
slaxemulator@8085 20 #define SVGA_MODE ASK_VGA
slaxemulator@8085 21 @@ -40,53 +42,412 @@
slaxemulator@8085 22 #define ROOT_RDONLY 1
slaxemulator@8085 23 #endif
slaxemulator@8085 24
slaxemulator@8085 25 +/* some extra features */
slaxemulator@8085 26 +#define EDIT_CMDLINE on hotkey
slaxemulator@8085 27 +#define SHOW_REGS show int13 status & parameters
slaxemulator@8085 28 +
slaxemulator@8085 29 .code16
slaxemulator@8085 30 .section ".bstext", "ax"
slaxemulator@8085 31
slaxemulator@8085 32 .global bootsect_start
slaxemulator@8085 33 bootsect_start:
slaxemulator@8085 34 + cld # assume nothing
slaxemulator@8085 35 +stacktop = 0x9E00 # in 0x8000 .. 0xA000
slaxemulator@8085 36 +zeroed = 48+10 # gdt + zeroed registers
slaxemulator@8085 37 + movw $stacktop-12-zeroed, %di # stacktop is an arbitrary value >=
slaxemulator@8085 38 + # length of bootsect + length of
slaxemulator@8085 39 + # setup + room for stack;
slaxemulator@8085 40 + # 12 is disk parm size.
slaxemulator@8085 41 + pushw $INITSEG
slaxemulator@8085 42 + popw %es # %es = INITSEG
slaxemulator@8085 43 +
slaxemulator@8085 44 + pushw %es
slaxemulator@8085 45 + popw %ss # %ss and %es already contain INITSEG
slaxemulator@8085 46 + movw %di, %sp # put stack at INITSEG:stacktop-...
slaxemulator@8085 47 +
slaxemulator@8085 48 +# Many BIOS's default disk parameter tables will not recognize
slaxemulator@8085 49 +# multi-sector reads beyond the maximum sector number specified
slaxemulator@8085 50 +# in the default diskette parameter tables - this may mean 7
slaxemulator@8085 51 +# sectors in some cases.
slaxemulator@8085 52 +#
slaxemulator@8085 53 +# Since single sector reads are slow and out of the question,
slaxemulator@8085 54 +# we must take care of this by creating new parameter tables
slaxemulator@8085 55 +# (for the first disk) in RAM. We can set the maximum sector
slaxemulator@8085 56 +# count to 36 - the most we will encounter on an ED 2.88.
slaxemulator@8085 57 +#
slaxemulator@8085 58 +# High doesn't hurt. Low does. Let's use the max: 63
slaxemulator@8085 59 +#
slaxemulator@8085 60 +# Segments are as follows: %es = %ss = INITSEG,
slaxemulator@8085 61 +
slaxemulator@8085 62 + xorw %ax, %ax # %ax = 0
slaxemulator@8085 63 + movw $zeroed/2, %cx # clear gdt + offset, %ds, limits
slaxemulator@8085 64 + rep # don't worry about cld
slaxemulator@8085 65 + stosw # already done above
slaxemulator@8085 66 + popw %bx # offset = 0
slaxemulator@8085 67 + popw %ds # %ds = 0
slaxemulator@8085 68 + popw %gs # %gs = 0
slaxemulator@8085 69 +
slaxemulator@8085 70 + movb setup_sects+0x7C00, %al # read bootsector + setup (%ds = 0)
slaxemulator@8085 71 + incw %ax
slaxemulator@8085 72 +
slaxemulator@8085 73 + pushw %es
slaxemulator@8085 74 + pushw %di # %ds:%bx+0x78 is parameter table address
slaxemulator@8085 75 + ldsw 0x78(%bx), %si # %ds:%si is source
slaxemulator@8085 76 + movb $6, %cl # copy 12 bytes
slaxemulator@8085 77 + rep # don't worry about cld
slaxemulator@8085 78 + movsw # already done above
slaxemulator@8085 79 + popl %gs:0x78(%bx) # update parameter table address
slaxemulator@8085 80 + pushw %es
slaxemulator@8085 81 + popw %ds # now %ds = %es = %ss = INITSEG
slaxemulator@8085 82 + movb $63, 0x4-12(%di) # patch sector count, %di = stacktop
slaxemulator@8085 83 + cli
slaxemulator@8085 84 +
slaxemulator@8085 85 + xchg %ax, %di # sector count
slaxemulator@8085 86 + popw %ax # limits = 0
slaxemulator@8085 87 + incw %cx # cylinder 0, sector 1
slaxemulator@8085 88 + call read_first_sectors # read setup
slaxemulator@8085 89 +
slaxemulator@8085 90 +offset_version = 0xE
slaxemulator@8085 91 + movw $0x200,%si
slaxemulator@8085 92 + addw offset_version(%si),%si # starting protocol 2.00, Kernel 1.3.73
slaxemulator@8085 93 + call putstr # show which kernel we are loading
slaxemulator@8085 94 +
slaxemulator@8085 95 +# The cmdline can be entered and modifed at boot time.
slaxemulator@8085 96 +# Only characters before the cursor are passed to the kernel.
slaxemulator@8085 97 + popw %bx # clear %bx
slaxemulator@8085 98 + orw cmd_line_ptr, %bx
slaxemulator@8085 99 + jz nocmdline
slaxemulator@8085 100 + pushw %bx
slaxemulator@8085 101 + incw %di
slaxemulator@8085 102 + call read_sectors
slaxemulator@8085 103 + popw %si
slaxemulator@8085 104 + call putstr
slaxemulator@8085 105 +#ifdef EDIT_CMDLINE
slaxemulator@8085 106 +cmdlp:
slaxemulator@8085 107 + movb $0x20, %al # clear end of line
slaxemulator@8085 108 + int $0x10 # with Space
slaxemulator@8085 109 + movb $8, %al # and BackSpace
slaxemulator@8085 110 + int $0x10
slaxemulator@8085 111 + decw %si
slaxemulator@8085 112 +cmdget:
slaxemulator@8085 113 + call wait4key
slaxemulator@8085 114 + cmpb $8, %al # BackSpace ?
slaxemulator@8085 115 + je cmdbs
slaxemulator@8085 116 + movb %al, (%si) # store char
slaxemulator@8085 117 + lodsw # %si += 2
slaxemulator@8085 118 +cmdbs:
slaxemulator@8085 119 +#if 1
slaxemulator@8085 120 + cmpw %si,cmd_line_ptr
slaxemulator@8085 121 + je cmdget
slaxemulator@8085 122 +#endif
slaxemulator@8085 123 + call putc # set %ah and %bx
slaxemulator@8085 124 + cmpb $10, %al # Enter ?
slaxemulator@8085 125 + jne cmdlp
slaxemulator@8085 126 + movb %bh,-2(%si) # set end of string and remove CR
slaxemulator@8085 127 +endcmdline:
slaxemulator@8085 128 +#endif
slaxemulator@8085 129 +nocmdline:
slaxemulator@8085 130
slaxemulator@8085 131 - # Normalize the start address
slaxemulator@8085 132 - ljmp $BOOTSEG, $start2
slaxemulator@8085 133 -
slaxemulator@8085 134 -start2:
slaxemulator@8085 135 - movw %cs, %ax
slaxemulator@8085 136 - movw %ax, %ds
slaxemulator@8085 137 - movw %ax, %es
slaxemulator@8085 138 - movw %ax, %ss
slaxemulator@8085 139 - xorw %sp, %sp
slaxemulator@8085 140 - sti
slaxemulator@8085 141 - cld
slaxemulator@8085 142 -
slaxemulator@8085 143 - movw $bugger_off_msg, %si
slaxemulator@8085 144 +# This routine loads the system at address SYSSEG, making sure
slaxemulator@8085 145 +# no 64kB boundaries are crossed. We try to load it as fast as
slaxemulator@8085 146 +# possible, loading whole tracks whenever we can.
slaxemulator@8085 147 +
slaxemulator@8085 148 +ramdisk_image = 0x0218
slaxemulator@8085 149 +ramdisk_size = 0x021C
slaxemulator@8085 150 + movw %sp, %si # for bootsect_gdt
slaxemulator@8085 151 + decw 16(%si) # bootsect_src = 64Kb
slaxemulator@8085 152 + decw 24(%si) # bootsect_dst = 64Kb
slaxemulator@8085 153 + movw $syssize, %di
slaxemulator@8085 154 +type_of_loader = 0x210
slaxemulator@8085 155 +loadflags = 0x211
slaxemulator@8085 156 +heap_end_ptr = 0x224
slaxemulator@8085 157 +ksyssize = 500
slaxemulator@8085 158 + orw $0x80FF, type_of_loader-ksyssize(%di) # loader type = 0xFF
slaxemulator@8085 159 + movw $stacktop-0x200, heap_end_ptr-ksyssize(%di)
slaxemulator@8085 160 + movb $0x10, %al # destination = 0x100000
slaxemulator@8085 161 + movb $5, %cl
slaxemulator@8085 162 +initrdlp:
slaxemulator@8085 163 + decw %ax
slaxemulator@8085 164 + movb $0x93,%ah
slaxemulator@8085 165 + movw %ax, 28(%si) # bootsect_dst_base+2
slaxemulator@8085 166 + movb $(SYSSEG/4096), %al # source = SYSSEG
slaxemulator@8085 167 + movw %ax, 20(%si) # bootsect_src_base+2
slaxemulator@8085 168 + cbw
slaxemulator@8085 169 + cwde
slaxemulator@8085 170 + shlw %cl, %ax
slaxemulator@8085 171 + decw %ax
slaxemulator@8085 172 + addl (%di),%eax
slaxemulator@8085 173 + shrl %cl, %eax
slaxemulator@8085 174 +syslp:
slaxemulator@8085 175 + pushw $SYSSEG
slaxemulator@8085 176 + popw %es
slaxemulator@8085 177 + movw $128,%di # 64Kb
slaxemulator@8085 178 + subw %di, %ax # max 32M > int 15 limit
slaxemulator@8085 179 + pushf
slaxemulator@8085 180 + jnc not_last
slaxemulator@8085 181 + addw %ax, %di
slaxemulator@8085 182 +not_last:
slaxemulator@8085 183 + xorw %bx, %bx # clear %bx
slaxemulator@8085 184 + pushw %ax
slaxemulator@8085 185 +#if defined(SHOW_REGS)
slaxemulator@8085 186 + pushw %si
slaxemulator@8085 187 + call read_sectors
slaxemulator@8085 188 + popw %si
slaxemulator@8085 189 +#else
slaxemulator@8085 190 + call read_sectors
slaxemulator@8085 191 +#endif
slaxemulator@8085 192 + movw $0x8000, %cx # full 64K
slaxemulator@8085 193 + movb $0x87, %ah
slaxemulator@8085 194 + incb 28(%si) # bootsect_dst_base+2
slaxemulator@8085 195 + int $0x15 # max 16M
slaxemulator@8085 196 + popw %ax
slaxemulator@8085 197 + popf
slaxemulator@8085 198 + ja syslp
slaxemulator@8085 199 + movw ramdisk_image+2,%ax
slaxemulator@8085 200 + movw $ramdisk_size,%di
slaxemulator@8085 201 + movb $9, %cl
slaxemulator@8085 202 + cmpb %al,28(%si)
slaxemulator@8085 203 + jb initrdlp
slaxemulator@8085 204 +
slaxemulator@8085 205 +# This procedure turns off the floppy drive motor, so
slaxemulator@8085 206 +# that we enter the kernel in a known state, and
slaxemulator@8085 207 +# don't have to worry about it later.
slaxemulator@8085 208 +
slaxemulator@8085 209 +#if 1
slaxemulator@8085 210 +kill_motor:
slaxemulator@8085 211 + xchgw %ax, %bx # reset FDC
slaxemulator@8085 212 + int $0x13
slaxemulator@8085 213 +#else
slaxemulator@8085 214 +kill_motor:
slaxemulator@8085 215 + movw $0x3f2, %dx
slaxemulator@8085 216 + xchgw %ax, %bx
slaxemulator@8085 217 + outb %al, %dx
slaxemulator@8085 218 +#endif
slaxemulator@8085 219
slaxemulator@8085 220 -msg_loop:
slaxemulator@8085 221 - lodsb
slaxemulator@8085 222 - andb %al, %al
slaxemulator@8085 223 - jz bs_die
slaxemulator@8085 224 - movb $0xe, %ah
slaxemulator@8085 225 - movw $7, %bx
slaxemulator@8085 226 +# After that (everything loaded), we jump to the setup-routine
slaxemulator@8085 227 +# loaded directly after the bootblock:
slaxemulator@8085 228 +# Segments are as follows: %ds = %ss = INITSEG
slaxemulator@8085 229 +
slaxemulator@8085 230 + ljmp $SETUPSEG, $0
slaxemulator@8085 231 +
slaxemulator@8085 232 +# read_sectors reads %di sectors into %es:0 buffer.
slaxemulator@8085 233 +# %es:0 is updated to the next memory location.
slaxemulator@8085 234 +# First, sectors are read sector by sector until
slaxemulator@8085 235 +# sector per track count is known. Then they are
slaxemulator@8085 236 +# read track by track.
slaxemulator@8085 237 +# Assume no error on first track.
slaxemulator@8085 238 +
slaxemulator@8085 239 +#define FLOPPY_CYLINDERS 80 /* 80 cylinders minimum */
slaxemulator@8085 240 +#define FLOPPY_HEADS 2 /* 2 heads minimum */
slaxemulator@8085 241 +#define FLOPPY_SECTORS 18 /* 18 sectors minimum */
slaxemulator@8085 242 +
slaxemulator@8085 243 +#ifdef SHOW_REGS
slaxemulator@8085 244 +print_loop:
slaxemulator@8085 245 + movb $0x6 + 'A' - 1, %al
slaxemulator@8085 246 + subb %cl, %al
slaxemulator@8085 247 + movw $regs, %si # caller %si is saved
slaxemulator@8085 248 + call putcs # putc(%al) + putstr(%si)
slaxemulator@8085 249 +# it will print out all of the registers.
slaxemulator@8085 250 + popw %bp # load word into %si
slaxemulator@8085 251 + jmp print_all # print %bp (status)
slaxemulator@8085 252 +#endif
slaxemulator@8085 253 +check_limits:
slaxemulator@8085 254 +#ifndef SHOW_REGS
slaxemulator@8085 255 + popw %dx
slaxemulator@8085 256 +#endif
slaxemulator@8085 257 + cmpb $FLOPPY_SECTORS+1, %cl # 18 sectors minimum
slaxemulator@8085 258 + jb check_head
slaxemulator@8085 259 + cmpb %al, %cl # max sector known ?
slaxemulator@8085 260 + ja next_head # no -> store it
slaxemulator@8085 261 +check_head:
slaxemulator@8085 262 + cmpb $FLOPPY_HEADS, %dh # 2 heads minimum
slaxemulator@8085 263 + jb check_cylinder
slaxemulator@8085 264 + cmpb %ah, %dh # max head known ?
slaxemulator@8085 265 + ja next_cylinder # no -> store it
slaxemulator@8085 266 +check_cylinder:
slaxemulator@8085 267 + pushaw
slaxemulator@8085 268 +#ifdef SHOW_REGS
slaxemulator@8085 269 + cmpw $0x600,%bp # disk changed ?
slaxemulator@8085 270 + je reset_floppy
slaxemulator@8085 271 + pushw %es # print %es (named EX)
slaxemulator@8085 272 + pushw %dx # print %dx
slaxemulator@8085 273 + pushw %cx # print %cx
slaxemulator@8085 274 + pushw %bx # print %bx
slaxemulator@8085 275 + xchgw %ax, %si
slaxemulator@8085 276 + movb $2,%ah
slaxemulator@8085 277 + pushw %ax # print %ax
slaxemulator@8085 278 + movb $6,%cl
slaxemulator@8085 279 +print_all:
slaxemulator@8085 280 + movb $4, %ch # 4 hex digits
slaxemulator@8085 281 +print_digit:
slaxemulator@8085 282 + rolw $4, %bp # rotate to use low 4 bits
slaxemulator@8085 283 + movb $0x0f, %al
slaxemulator@8085 284 + andw %bp, %ax # %al = mask for nybble
slaxemulator@8085 285 + addb $0x90, %al # convert %al to ascii hex
slaxemulator@8085 286 + daa # in only four instructions!
slaxemulator@8085 287 + adcb $0x40, %al
slaxemulator@8085 288 + daa
slaxemulator@8085 289 + call putc # set %ah and %bx
slaxemulator@8085 290 + decb %ch
slaxemulator@8085 291 + jnz print_digit
slaxemulator@8085 292 + movb $0x20, %al # SPACE
slaxemulator@8085 293 int $0x10
slaxemulator@8085 294 - jmp msg_loop
slaxemulator@8085 295 -
slaxemulator@8085 296 -bs_die:
slaxemulator@8085 297 - # Allow the user to press a key, then reboot
slaxemulator@8085 298 - xorw %ax, %ax
slaxemulator@8085 299 + loop print_loop
slaxemulator@8085 300 + call wait
slaxemulator@8085 301 + cbw # %ah = 0
slaxemulator@8085 302 +reset_floppy:
slaxemulator@8085 303 +#else
slaxemulator@8085 304 + cbw # %ah = 0
slaxemulator@8085 305 +#endif
slaxemulator@8085 306 + int $0x13 # reset controler
slaxemulator@8085 307 + popaw
slaxemulator@8085 308 +read_sectorslp:
slaxemulator@8085 309 + pushw %dx # some bios break dx...
slaxemulator@8085 310 + pushw %ax # limits
slaxemulator@8085 311 + subb %cl, %al # sectors remaining in track
slaxemulator@8085 312 + ja tolastsect
slaxemulator@8085 313 + movb $1, %al # 1 sector mini
slaxemulator@8085 314 +tolastsect:
slaxemulator@8085 315 + cbw
slaxemulator@8085 316 + cmpw %di, %ax
slaxemulator@8085 317 + jb more1trk
slaxemulator@8085 318 + movw %di, %ax # sectors to read
slaxemulator@8085 319 +more1trk:
slaxemulator@8085 320 + pushw %ax # save context
slaxemulator@8085 321 + movb $2, %ah # cmd: read chs
slaxemulator@8085 322 + int $0x13
slaxemulator@8085 323 +#ifdef SHOW_REGS
slaxemulator@8085 324 + xchgw %ax, %bp # status
slaxemulator@8085 325 +#endif
slaxemulator@8085 326 +# ifdef SHOW_REGS
slaxemulator@8085 327 + popw %si # save %ax
slaxemulator@8085 328 + popw %ax # limits
slaxemulator@8085 329 + popw %dx
slaxemulator@8085 330 +# else
slaxemulator@8085 331 + popw %dx # save %ax
slaxemulator@8085 332 + popw %ax # limits
slaxemulator@8085 333 +# endif
slaxemulator@8085 334 + jc check_limits
slaxemulator@8085 335 + xchgw %ax, %bp
slaxemulator@8085 336 +# ifdef SHOW_REGS
slaxemulator@8085 337 +update_regs:
slaxemulator@8085 338 + incw %cx # next sector
slaxemulator@8085 339 + movw %cx, %fs
slaxemulator@8085 340 + addb $2,%bh # next location
slaxemulator@8085 341 + decw %di # update sector counter
slaxemulator@8085 342 + jz putcdot
slaxemulator@8085 343 + decw %si
slaxemulator@8085 344 + jnz update_regs
slaxemulator@8085 345 +# else
slaxemulator@8085 346 + addw %dx,%cx # next sector
slaxemulator@8085 347 + addb %dl,%bh
slaxemulator@8085 348 + addb %dl,%bh # next location
slaxemulator@8085 349 + subw %dx,%di # update sector counter
slaxemulator@8085 350 + popw %dx
slaxemulator@8085 351 + jz putcdot
slaxemulator@8085 352 +# endif
slaxemulator@8085 353 +read_sectors:
slaxemulator@8085 354 + movw %fs, %cx
slaxemulator@8085 355 + xchgw %ax, %bp
slaxemulator@8085 356 + cmpb %al,%cl # reach sector limit ?
slaxemulator@8085 357 + jne bdendlp
slaxemulator@8085 358 +next_head:
slaxemulator@8085 359 + movb %cl,%al
slaxemulator@8085 360 + incb %dh # next head
slaxemulator@8085 361 + movb $1,%cl # first sector
slaxemulator@8085 362 + cmpb %ah, %dh # reach head limit ?
slaxemulator@8085 363 + jne bdendlp
slaxemulator@8085 364 +next_cylinder:
slaxemulator@8085 365 + movb %dh,%ah
slaxemulator@8085 366 +# NOTE : support 256 cylinders max
slaxemulator@8085 367 + incb %ch # next cylinder
slaxemulator@8085 368 +read_first_sectors:
slaxemulator@8085 369 + movb $0,%dh # first head
slaxemulator@8085 370 +cylinder_count = 496
slaxemulator@8085 371 + cmpb $FLOPPY_CYLINDERS,%ch # reach cylinder limit ?
slaxemulator@8085 372 + jb bdendlp
slaxemulator@8085 373 + cmpb cylinder_count, %ch
slaxemulator@8085 374 + jb bdendlp
slaxemulator@8085 375 +next_floppy:
slaxemulator@8085 376 + movb $0,%ch # first cylinder
slaxemulator@8085 377 + pushaw
slaxemulator@8085 378 + movw $swap_floppy,%si
slaxemulator@8085 379 + incb 12(%si)
slaxemulator@8085 380 + pushw %bx
slaxemulator@8085 381 + call putstr
slaxemulator@8085 382 + popw %bx
slaxemulator@8085 383 +waitfloppy:
slaxemulator@8085 384 + call wait
slaxemulator@8085 385 + jne waitfloppydone
slaxemulator@8085 386 + pushw %dx # some bios break dx...
slaxemulator@8085 387 + cbw
slaxemulator@8085 388 + int $0x13 # reset FDC
slaxemulator@8085 389 + movw $0x201,%ax
slaxemulator@8085 390 +# cwd
slaxemulator@8085 391 +# movw $1,%cx
slaxemulator@8085 392 + int $0x13 # read first sector
slaxemulator@8085 393 + popw %dx
slaxemulator@8085 394 + rclb $1,%ah # floppy changed 06=>0D no error 00
slaxemulator@8085 395 + cmpb -2(%si), %ah # 0D then 00
slaxemulator@8085 396 + jne waitfloppy # no => try again
slaxemulator@8085 397 + incw %si
slaxemulator@8085 398 + orb %ah,%ah # was 00 ?
slaxemulator@8085 399 + jne waitfloppy
slaxemulator@8085 400 +waitfloppydone:
slaxemulator@8085 401 + popaw
slaxemulator@8085 402 +bdendlp:
slaxemulator@8085 403 + jmp read_sectorslp
slaxemulator@8085 404 +
slaxemulator@8085 405 +putcdot:
slaxemulator@8085 406 + pushw %ss
slaxemulator@8085 407 + popw %es # restore es
slaxemulator@8085 408 + movb $0x2e+3, %al # loading... message 2e = .
slaxemulator@8085 409 +putclf:
slaxemulator@8085 410 + subb $3, %al
slaxemulator@8085 411 +putc:
slaxemulator@8085 412 + movb $0xe, %ah
slaxemulator@8085 413 + movw $7, %bx # one dot each 64k
slaxemulator@8085 414 + int $0x10
slaxemulator@8085 415 + cmp $0xd, %al # CR ?
slaxemulator@8085 416 + je putclf
slaxemulator@8085 417 + ret
slaxemulator@8085 418 +
slaxemulator@8085 419 +putstr:
slaxemulator@8085 420 + movb $0xd, %al # CR
slaxemulator@8085 421 +putcs:
slaxemulator@8085 422 + call putc
slaxemulator@8085 423 + lodsb
slaxemulator@8085 424 + orb %al,%al # end of string is \0
slaxemulator@8085 425 + jnz putcs
slaxemulator@8085 426 + ret
slaxemulator@8085 427 +
slaxemulator@8085 428 +clock = 0x46C
slaxemulator@8085 429 +wait:
slaxemulator@8085 430 +wait4key:
slaxemulator@8085 431 + movw $clock, %di
slaxemulator@8085 432 +#define DELAY 5
slaxemulator@8085 433 + movb $(DELAY*182)/10,%cl
slaxemulator@8085 434 + addb %gs:(%di),%cl
slaxemulator@8085 435 +waitkbd:
slaxemulator@8085 436 + movw $0x10D, %ax # test keyboard, timeout => CR
slaxemulator@8085 437 + cmpb %gs:(%di),%cl
slaxemulator@8085 438 + je waitdone
slaxemulator@8085 439 int $0x16
slaxemulator@8085 440 - int $0x19
slaxemulator@8085 441 + jz waitkbd
slaxemulator@8085 442 + cbw
slaxemulator@8085 443 + int $0x16 # eat char
slaxemulator@8085 444 + movw %di, %gs # disable timeout
slaxemulator@8085 445 + incw %di # clear Z
slaxemulator@8085 446 +waitdone:
slaxemulator@8085 447 + ret
slaxemulator@8085 448
slaxemulator@8085 449 - # int 0x19 should never return. In case it does anyway,
slaxemulator@8085 450 - # invoke the BIOS reset code...
slaxemulator@8085 451 - ljmp $0xf000,$0xfff0
slaxemulator@8085 452 -
slaxemulator@8085 453 - .section ".bsdata", "a"
slaxemulator@8085 454 -bugger_off_msg:
slaxemulator@8085 455 - .ascii "Direct booting from floppy is no longer supported.\r\n"
slaxemulator@8085 456 - .ascii "Please use a boot loader program instead.\r\n"
slaxemulator@8085 457 - .ascii "\n"
slaxemulator@8085 458 - .ascii "Remove disk and press any key to reboot . . .\r\n"
slaxemulator@8085 459 - .byte 0
slaxemulator@8085 460 +#ifdef SHOW_REGS
slaxemulator@8085 461 +regs: .asciz "X:"
slaxemulator@8085 462 +#endif
slaxemulator@8085 463
slaxemulator@8085 464 +swap_floppy: .ascii "Insert disk 1"
slaxemulator@8085 465 + .ascii "."
slaxemulator@8085 466 + .byte 7,13,0
slaxemulator@8085 467
slaxemulator@8085 468 # Kernel attributes; used by setup. This is part 1 of the
slaxemulator@8085 469 # header, from the old boot sector.