wok-current rev 5060
linux/boot: keyboardless support
| author | Pascal Bellard <pascal.bellard@slitaz.org> |
|---|---|
| date | Tue Mar 09 13:32:08 2010 +0100 (2010-03-09) |
| parents | f642eb9dd1b4 |
| children | b4fa2f5e2632 |
| files | linux/stuff/linux-header-2.6.30.6.u |
line diff
1.1 --- a/linux/stuff/linux-header-2.6.30.6.u Tue Mar 09 00:20:04 2010 +0100 1.2 +++ b/linux/stuff/linux-header-2.6.30.6.u Tue Mar 09 13:32:08 2010 +0100 1.3 @@ -18,37 +18,34 @@ 1.4 1.5 #ifndef SVGA_MODE 1.6 #define SVGA_MODE ASK_VGA 1.7 -@@ -39,53 +41,394 @@ 1.8 +@@ -39,53 +41,412 @@ 1.9 #define ROOT_RDONLY 1 1.10 #endif 1.11 1.12 -+#define SHOW_REGS show int13 status & parameters 1.13 -+#define EDIT_CMDLINE add kernel command line support 1.14 ++/* some extra features */ 1.15 ++#define EDIT_CMDLINE on hotkey 1.16 ++#define SHOW_REGS show int13 status & parameters 1.17 + 1.18 .code16 1.19 .section ".bstext", "ax" 1.20 1.21 .global bootsect_start 1.22 bootsect_start: 1.23 ++ cld # assume nothing 1.24 +stacktop = 0x9E00 # in 0x8000 .. 0xA000 1.25 -+ # with 512 bytes for cmdline 1.26 -+ movw $stacktop-12, %di # stacktop is an arbitrary value >= 1.27 ++zeroed = 48+10 # gdt + zeroed registers 1.28 ++ movw $stacktop-12-zeroed, %di # stacktop is an arbitrary value >= 1.29 + # length of bootsect + length of 1.30 + # setup + room for stack; 1.31 + # 12 is disk parm size. 1.32 -+ # gdt will heat 48 more bytes. 1.33 -+curcx = 0 1.34 -+curdx = curcx+2 1.35 -+ cld # assume nothing 1.36 -+#ifndef FLOPPY_1440K_ONLY 1.37 -+limits = 4 1.38 -+#endif 1.39 ++ pushw $INITSEG 1.40 ++ popw %es # %es = INITSEG 1.41 1.42 - # Normalize the start address 1.43 - ljmp $BOOTSEG, $start2 1.44 -+ pushw $INITSEG 1.45 -+ popw %es # %es = INITSEG 1.46 -+ xorw %cx, %cx # %cx = 0 1.47 ++ pushw %es 1.48 ++ popw %ss # %ss and %es already contain INITSEG 1.49 ++ movw %di, %sp # put stack at INITSEG:stacktop-... 1.50 1.51 -start2: 1.52 - movw %cs, %ax 1.53 @@ -58,11 +55,6 @@ 1.54 - xorw %sp, %sp 1.55 - sti 1.56 - cld 1.57 -+ pushw %es 1.58 -+ popw %ss # %ss and %es already contain INITSEG 1.59 -+ movw %di, %sp # put stack at INITSEG:stacktop-12. 1.60 - 1.61 -- movw $bugger_off_msg, %si 1.62 +# Many BIOS's default disk parameter tables will not recognize 1.63 +# multi-sector reads beyond the maximum sector number specified 1.64 +# in the default diskette parameter tables - this may mean 7 1.65 @@ -76,7 +68,15 @@ 1.66 +# High doesn't hurt. Low does. Let's use the max: 63 1.67 +# 1.68 +# Segments are as follows: %es = %ss = INITSEG, 1.69 -+# %fs and %gs are unused. 1.70 + 1.71 +- movw $bugger_off_msg, %si 1.72 ++ xorw %ax, %ax # %ax = 0 1.73 ++ movw $zeroed/2, %cx # clear gdt + offset, %ds, limits 1.74 ++ rep # don't worry about cld 1.75 ++ stosw # already done above 1.76 ++ popw %bx # offset = 0 1.77 ++ popw %ds # %ds = 0 1.78 ++ popw %gs # %gs = 0 1.79 1.80 -msg_loop: 1.81 - lodsb 1.82 @@ -84,133 +84,127 @@ 1.83 - jz bs_die 1.84 - movb $0xe, %ah 1.85 - movw $7, %bx 1.86 -+ movw $0x78, %bx # %ds:%bx is parameter table address 1.87 -+ movw %cx, %ds # %ds = 0 1.88 -+ ldsw (%bx), %si # %ds:%si is source 1.89 ++ movb setup_sects+0x7C00, %al # read bootsector + setup (%ds = 0) 1.90 ++ incw %ax 1.91 ++ 1.92 ++ pushw %es 1.93 ++ pushw %di # %ds:%bx+0x78 is parameter table address 1.94 ++ ldsw 0x78(%bx), %si # %ds:%si is source 1.95 + movb $6, %cl # copy 12 bytes 1.96 + rep # don't worry about cld 1.97 + movsw # already done above 1.98 -+ movw %cx, %ds # %ds = 0 1.99 -+ movw %sp, (%bx) # %sp = stacktop-12 1.100 -+ movw %es, 2(%bx) 1.101 -+ 1.102 -+ movb setup_sects+0x7C00, %al # read bootsector + setup (%ds = 0) 1.103 -+ cbw 1.104 -+ incw %ax 1.105 -+ 1.106 ++ popl %gs:0x78(%bx) # update parameter table address 1.107 + pushw %es 1.108 + popw %ds # now %ds = %es = %ss = INITSEG 1.109 + movb $63, 0x4-12(%di) # patch sector count, %di = stacktop 1.110 -+ 1.111 + cli 1.112 + 1.113 -+ movb $24, %bl # allocate 48 bytes in stack 1.114 -+init_gdt: 1.115 -+ pushw %cx # initialized with 0 1.116 -+ decw %bx 1.117 -+ jnz init_gdt 1.118 -+ 1.119 + xchg %ax, %di # sector count 1.120 -+ cbw # limits = 0 1.121 ++ popw %ax # limits = 0 1.122 + incw %cx # cylinder 0, sector 1 1.123 + call read_first_sectors # read setup 1.124 + 1.125 -+#define version_offset 0xE 1.126 -+#define loadflags_offset 0x11 1.127 -+#define heap_end_ptr_offset 0x24 1.128 -+ 1.129 -+ movw $_start,%si 1.130 -+ orb $0x80, loadflags_offset(%si) 1.131 -+ movw $stacktop-0x200, heap_end_ptr_offset(%si) 1.132 -+ 1.133 -+ addw version_offset(%si),%si # starting protocol 2.00, Kernel 1.3.73 1.134 ++#define kernel_version 0xE 1.135 ++ movw $0x200,%si 1.136 ++ addw kernel_version(%si),%si # starting protocol 2.00, Kernel 1.3.73 1.137 + call puts # show which kernel we are loading 1.138 + 1.139 ++# The cmdline can be entered and modifed at boot time. 1.140 ++# Only characters before the cursor are passed to the kernel. 1.141 ++ popw %bx # clear %bx 1.142 ++ orw cmd_line_ptr, %bx 1.143 ++ jz nocmdline 1.144 ++ pushw %bx 1.145 ++ call read_one_sector 1.146 ++ popw %si 1.147 ++ call puts 1.148 +#ifdef EDIT_CMDLINE 1.149 -+# The cmdline can be entered and modifed on hot key. 1.150 -+# Only characters before the cursor are passed to the kernel. 1.151 -+ movw $cmd_line_ptr, %si 1.152 -+ cmpw %bx,(%si) # %bx = 7 1.153 -+ jb nocmdline 1.154 -+ incw %di # read 1 sector 1.155 -+ movw (%si), %bx 1.156 -+ pushw %si 1.157 -+ call read_sectors 1.158 -+ popw %di 1.159 -+ movw (%di), %si 1.160 -+ call puts 1.161 +cmdlp: 1.162 -+ movb $32, %al # clear end of line 1.163 ++ movb $0x20, %al # clear end of line 1.164 + int $0x10 # with Space 1.165 + movb $8, %al # and BackSpace 1.166 int $0x10 1.167 - jmp msg_loop 1.168 + decw %si 1.169 +cmdget: 1.170 -+ cbw # %ah = 0, get keyboard character 1.171 -+ int $0x16 1.172 ++ call wait4key 1.173 + cmpb $8, %al # BackSpace ? 1.174 + je cmdbs 1.175 + movb %al, (%si) # store char 1.176 + lodsw # %si += 2 1.177 +cmdbs: 1.178 -+ cmpw (%di), %si # lower limit is checked 1.179 -+ je cmdget # but upper limit not 1.180 ++#if 1 1.181 ++ cmpw %si,cmd_line_ptr 1.182 ++ je cmdget 1.183 ++#endif 1.184 + call putc # set %ah and %bx 1.185 + cmpb $10, %al # Enter ? 1.186 + jne cmdlp 1.187 -+ movb %bh,-2(%si) # set end of line, remove CR 1.188 ++ movb %bh,-2(%si) # set end of string and remove CR 1.189 +endcmdline: 1.190 -+ 1.191 ++#endif 1.192 +nocmdline: 1.193 -+#endif 1.194 1.195 -bs_die: 1.196 - # Allow the user to press a key, then reboot 1.197 - xorw %ax, %ax 1.198 +- int $0x16 1.199 +- int $0x19 1.200 +# This routine loads the system at address SYSSEG, making sure 1.201 +# no 64kB boundaries are crossed. We try to load it as fast as 1.202 +# possible, loading whole tracks whenever we can. 1.203 -+ 1.204 + 1.205 +- # int 0x19 should never return. In case it does anyway, 1.206 +- # invoke the BIOS reset code... 1.207 +- ljmp $0xf000,$0xfff0 1.208 ++ramdisk_image = 0x0218 1.209 ++ramdisk_size = 0x021C 1.210 + movw %sp, %si # for bootsect_gdt 1.211 ++ decw 16(%si) # bootsect_src = 64Kb 1.212 ++ decw 24(%si) # bootsect_dst = 64Kb 1.213 ++ movw $syssize, %di 1.214 ++type_of_loader = 0x210 1.215 ++loadflags = 0x211 1.216 ++heap_end_ptr = 0x224 1.217 ++ksyssize = 500 1.218 ++ orw $0x80FF, type_of_loader-ksyssize(%di) # loader type = 0xFF 1.219 ++ movw $stacktop-0x200, heap_end_ptr-ksyssize(%di) 1.220 + movb $0x0F, %al # destination = 0x100000 1.221 -+ movw $syssize, %di 1.222 -+#define type_of_loader_offset 0x1C /* type_of_loader - syssize */ 1.223 -+ decb type_of_loader_offset(%di) # loader type = 0xFF 1.224 + movb $5, %cl 1.225 +initrdlp: 1.226 + movb $0x93,%ah 1.227 + movw %ax, 28(%si) # bootsect_dst_base+2 1.228 + movb $(SYSSEG/4096), %al # source = SYSSEG 1.229 + movw %ax, 20(%si) # bootsect_src_base+2 1.230 -+ cwd 1.231 -+ movw %dx, 16(%si) # bootsect_src = 64Kb 1.232 -+ movw %dx, 24(%si) # bootsect_dst = 64Kb 1.233 -+ xorl %ebx, %ebx 1.234 -+ incw %bx 1.235 -+ shlw %cl,%bx 1.236 -+ decw %bx 1.237 -+ addl (%di),%ebx 1.238 -+ shrl %cl, %ebx 1.239 ++ cbw 1.240 ++ cwde 1.241 ++ shlw %cl, %ax 1.242 ++ decw %ax 1.243 ++ addl (%di),%eax 1.244 ++ shrl %cl, %eax 1.245 +syslp: 1.246 + pushw $SYSSEG 1.247 + popw %es 1.248 + movw $128,%di # 64Kb 1.249 -+ subw %di, %bx # max 32M > int 15 limit 1.250 ++ subw %di, %ax # max 32M > int 15 limit 1.251 + pushf 1.252 + jnc not_last 1.253 -+ addw %bx, %di 1.254 ++ addw %ax, %di 1.255 +not_last: 1.256 -+ pushw %bx 1.257 ++ xorw %bx, %bx # clear %bx 1.258 ++ pushw %ax 1.259 ++#if defined(SHOW_REGS) 1.260 + pushw %si 1.261 -+ xorw %bx, %bx 1.262 + call read_sectors 1.263 + popw %si 1.264 ++#else 1.265 ++ call read_sectors 1.266 ++#endif 1.267 + movw $0x8000, %cx # full 64K 1.268 + movb $0x87, %ah 1.269 + incb 28(%si) # bootsect_dst_base+2 1.270 + int $0x15 # max 16M 1.271 -+ popw %bx 1.272 ++ popw %ax 1.273 + popf 1.274 + ja syslp 1.275 + movw ramdisk_image+2,%ax 1.276 @@ -219,14 +213,28 @@ 1.277 + movb $9, %cl 1.278 + cmpb %al,28(%si) 1.279 + jb initrdlp 1.280 -+ 1.281 + 1.282 +- .section ".bsdata", "a" 1.283 +-bugger_off_msg: 1.284 +- .ascii "Direct booting from floppy is no longer supported.\r\n" 1.285 +- .ascii "Please use a boot loader program instead.\r\n" 1.286 +- .ascii "\n" 1.287 +- .ascii "Remove disk and press any key to reboot . . .\r\n" 1.288 +- .byte 0 1.289 +# This procedure turns off the floppy drive motor, so 1.290 +# that we enter the kernel in a known state, and 1.291 +# don't have to worry about it later. 1.292 -+ 1.293 + 1.294 ++#if 1 1.295 +kill_motor: 1.296 -+ xorw %ax, %ax # reset FDC 1.297 ++ xchgw %ax, %bx # reset FDC 1.298 + int $0x13 1.299 ++#else 1.300 ++kill_motor: 1.301 ++ movw $0x3f2, %dx 1.302 ++ xchgw %ax, %bx 1.303 ++ outb %al, %dx 1.304 ++#endif 1.305 + 1.306 +# After that (everything loaded), we jump to the setup-routine 1.307 +# loaded directly after the bootblock: 1.308 @@ -252,11 +260,13 @@ 1.309 + movw $regs, %si # caller %si is saved 1.310 + call putcs # putc(%al) + puts(%si) 1.311 +# it will print out all of the registers. 1.312 -+ popw %bp # load word into %bp 1.313 ++ popw %bp # load word into %si 1.314 + jmp print_all # print %bp (status) 1.315 +#endif 1.316 +check_limits: 1.317 -+#ifndef FLOPPY_1440K_ONLY 1.318 ++#ifndef SHOW_REGS 1.319 ++ popw %dx 1.320 ++#endif 1.321 + cmpb $FLOPPY_SECTORS+1, %cl # 18 sectors minimum 1.322 + jb check_head 1.323 + cmpb %al, %cl # max sector known ? 1.324 @@ -267,9 +277,6 @@ 1.325 + cmpb %ah, %dh # max head known ? 1.326 + ja next_cylinder # no -> store it 1.327 +check_cylinder: 1.328 -+ cmpb $FLOPPY_CYLINDERS, %ch # 80 cylinders minimum 1.329 -+ jae next_floppy 1.330 -+#endif 1.331 + pushaw 1.332 +#ifdef SHOW_REGS 1.333 + cmpw $0x600,%bp # disk changed ? 1.334 @@ -278,15 +285,12 @@ 1.335 + pushw %dx # print %dx 1.336 + pushw %cx # print %cx 1.337 + pushw %bx # print %bx 1.338 -+#ifndef FLOPPY_1440K_ONLY 1.339 + xchgw %ax, %si 1.340 -+#endif 1.341 + movb $2,%ah 1.342 + pushw %ax # print %ax 1.343 -+ movw $6,%cx 1.344 ++ movb $6,%cl 1.345 +print_all: 1.346 -+ pushw %cx # save count remaining 1.347 -+ movb $4, %cl # 4 hex digits 1.348 ++ movb $4, %ch # 4 hex digits 1.349 +print_digit: 1.350 + rolw $4, %bp # rotate to use low 4 bits 1.351 + movb $0x0f, %al 1.352 @@ -296,118 +300,121 @@ 1.353 + adcb $0x40, %al 1.354 + daa 1.355 + call putc # set %ah and %bx 1.356 -+ loop print_digit 1.357 ++ decb %ch 1.358 ++ jnz print_digit 1.359 + movb $0x20, %al # SPACE 1.360 + int $0x10 1.361 -+ popw %cx 1.362 + loop print_loop 1.363 ++ call wait 1.364 ++ cbw # %ah = 0 1.365 +reset_floppy: 1.366 ++#else 1.367 ++ cbw # %ah = 0 1.368 +#endif 1.369 -+ cbw # %ah = 0 1.370 + int $0x13 # reset controler 1.371 + popaw 1.372 +read_sectorslp: 1.373 -+ xorw %si, %si 1.374 -+ lodsw 1.375 -+ xchgw %ax,%cx # restore disk state 1.376 -+ lodsw 1.377 -+ xchgw %ax,%dx 1.378 -+#ifndef FLOPPY_1440K_ONLY 1.379 -+# al is last sector+1 1.380 -+# ah is last cylinder+1 1.381 -+ lodsw 1.382 -+#endif 1.383 -+#ifndef FLOPPY_1440K_ONLY 1.384 ++ pushw %dx # some bios break dx... 1.385 + pushw %ax # limits 1.386 + subb %cl, %al # sectors remaining in track 1.387 + ja tolastsect 1.388 + movb $1, %al # 1 sector mini 1.389 +tolastsect: 1.390 -+#else 1.391 -+ mov $FLOPPY_SECTORS+1, %al 1.392 -+ subb %cl, %al # sectors remaining in track 1.393 -+#endif 1.394 + cbw 1.395 + cmpw %di, %ax 1.396 + jb more1trk 1.397 + movw %di, %ax # sectors to read 1.398 +more1trk: 1.399 + pushw %ax # save context 1.400 -+ pushw %dx # some bios break dx... 1.401 + movb $2, %ah # cmd: read chs 1.402 + int $0x13 1.403 -+ popw %dx 1.404 ++#ifdef SHOW_REGS 1.405 + xchgw %ax, %bp # status 1.406 -+#ifndef FLOPPY_1440K_ONLY 1.407 ++#endif 1.408 ++# ifdef SHOW_REGS 1.409 + popw %si # save %ax 1.410 + popw %ax # limits 1.411 -+#else 1.412 -+ popw %ax # restore context 1.413 -+#endif 1.414 ++ popw %dx 1.415 ++# else 1.416 ++ popw %dx # save %ax 1.417 ++ popw %ax # limits 1.418 ++# endif 1.419 + jc check_limits 1.420 -+#ifndef FLOPPY_1440K_ONLY 1.421 -+ subw %si,%di # update sector counter 1.422 -+ addw %si,%cx # next sector 1.423 -+ shlw $9,%si 1.424 -+ addw %si,%bx # next location 1.425 -+#else 1.426 -+ subw %ax,%di # update sector counter 1.427 -+ addw %ax,%cx # next sector 1.428 -+ addw %ax,%ax 1.429 -+ addb %al,%bh # next location 1.430 -+#endif 1.431 -+#ifndef FLOPPY_1440K_ONLY 1.432 ++# ifdef SHOW_REGS 1.433 ++update_regs: 1.434 ++ decw %di # update sector counter 1.435 ++ incw %cx # next sector 1.436 ++ addb $2,%bh # next location 1.437 ++ decw %si 1.438 ++ jnz update_regs 1.439 ++# else 1.440 ++ subw %dx,%di # update sector counter 1.441 ++ addw %dx,%cx # next sector 1.442 ++ addw %dx,%dx 1.443 ++ addb %dl,%bh # next location 1.444 ++ popw %dx 1.445 ++# endif 1.446 + cmpb %al,%cl # reach sector limit ? 1.447 + jne bdendlp 1.448 +next_head: 1.449 + movb %cl,%al 1.450 -+#else 1.451 -+ cmpb $FLOPPY_SECTORS+1,%cl # reach sector limit ? 1.452 -+ jne bdendlp 1.453 -+#endif 1.454 + incb %dh # next head 1.455 + movb $1,%cl # first sector 1.456 -+#ifndef FLOPPY_1440K_ONLY 1.457 + cmpb %ah, %dh # reach head limit ? 1.458 + jne bdendlp 1.459 +next_cylinder: 1.460 + movb %dh,%ah 1.461 -+#else 1.462 -+ cmpb %cl,%dh # reach head limit ? 1.463 -+ je bdendlp 1.464 -+#endif 1.465 +# NOTE : support 256 cylinders max 1.466 + incb %ch # next cylinder 1.467 +read_first_sectors: 1.468 + movb $0,%dh # first head 1.469 -+#ifndef FLOPPY_1440K_ONLY 1.470 -+ cmpb $FLOPPY_SECTORS+1,%al # 1.44M floppy ? 1.471 -+ jne bdendlp 1.472 -+#endif 1.473 ++cylinder_count = 496 1.474 ++ cmpb cylinder_count, %ch 1.475 ++ jb bdendlp 1.476 + cmpb $FLOPPY_CYLINDERS,%ch # reach cylinder limit ? 1.477 + jb bdendlp 1.478 +next_floppy: 1.479 + movb $0,%ch # first cylinder 1.480 + pushaw 1.481 + movw $swap_floppy,%si 1.482 ++ incb 12(%si) 1.483 ++ pushw %bx 1.484 + call puts 1.485 -+ cbw # %ah = 0, get keyboard character 1.486 - int $0x16 1.487 -- int $0x19 1.488 ++ popw %bx 1.489 ++waitfloppy: 1.490 ++ call wait 1.491 ++ jne waitfloppydone 1.492 ++ pushw %dx # some bios break dx... 1.493 ++ cbw 1.494 ++ int $0x13 # reset FDC 1.495 ++ movw $0x201,%ax 1.496 ++# cwd 1.497 ++# movw $1,%cx 1.498 ++ int $0x13 # read first sector 1.499 ++ popw %dx 1.500 ++ rclb $1,%ah # floppy changed 06=>0D no error 00 1.501 ++ cmpb -2(%si), %ah # 0D then 00 1.502 ++ jne waitfloppy # no => try again 1.503 ++ incw %si 1.504 ++ orb %ah,%ah # was 00 ? 1.505 ++ jne waitfloppy 1.506 ++waitfloppydone: 1.507 + popaw 1.508 +bdendlp: 1.509 -+#ifndef FLOPPY_1440K_ONLY 1.510 -+ movw %ax, limits 1.511 -+#endif 1.512 -+ pushw %dx 1.513 -+ pushw %cx 1.514 -+ popl curcx # save disk state 1.515 ++ xchgw %ax, %bp 1.516 ++ movw %cx, %fs 1.517 +read_sectors: 1.518 -+ orw %di,%di 1.519 -+ jne read_sectorslp 1.520 ++ decw %di 1.521 ++read_one_sector: 1.522 ++ movw %fs, %cx 1.523 ++# al is last sector+1 1.524 ++# ah is last cylinder+1 1.525 ++ movw %bp, %ax 1.526 ++ incw %di 1.527 ++ jnz read_sectorslp 1.528 + pushw %ss 1.529 + popw %es # restore es 1.530 -+ movb $0x2e+3, %al # 2e = . 1.531 ++ movb $0x2e+3, %al # loading... message 2e = . 1.532 +putclf: 1.533 + subb $3, %al 1.534 +putc: 1.535 @@ -417,10 +424,7 @@ 1.536 + cmp $0xd, %al # CR ? 1.537 + je putclf 1.538 + ret 1.539 - 1.540 -- # int 0x19 should never return. In case it does anyway, 1.541 -- # invoke the BIOS reset code... 1.542 -- ljmp $0xf000,$0xfff0 1.543 ++ 1.544 +puts: 1.545 + movb $0xd, %al # CR 1.546 +putcs: 1.547 @@ -429,19 +433,34 @@ 1.548 + orb %al,%al # end of string is \0 1.549 + jnz putcs 1.550 + ret 1.551 - 1.552 -- .section ".bsdata", "a" 1.553 --bugger_off_msg: 1.554 -- .ascii "Direct booting from floppy is no longer supported.\r\n" 1.555 -- .ascii "Please use a boot loader program instead.\r\n" 1.556 -- .ascii "\n" 1.557 -- .ascii "Remove disk and press any key to reboot . . .\r\n" 1.558 -- .byte 0 1.559 ++ 1.560 ++clock = 0x46C 1.561 ++wait: 1.562 ++wait4key: 1.563 ++ movw $clock, %di 1.564 ++#define DELAY 5 1.565 ++ movb $(DELAY*182)/10,%cl 1.566 ++ addb %gs:(%di),%cl 1.567 ++waitkbd: 1.568 ++ movw $0x10D, %ax # test keyboard, timeout => CR 1.569 ++ cmpb %gs:(%di),%cl 1.570 ++ je waitdone 1.571 ++ int $0x16 1.572 ++ jz waitkbd 1.573 ++ cbw 1.574 ++ int $0x16 # eat char 1.575 ++ movw %di, %gs # disable timeout 1.576 ++ incw %di # clear Z 1.577 ++waitdone: 1.578 ++ ret 1.579 ++ 1.580 ++#ifdef SHOW_REGS 1.581 +regs: .asciz "X:" 1.582 - 1.583 -+swap_floppy: 1.584 -+ .ascii "Insert next floppy and press any key to continue." 1.585 -+ .byte 7,13,0 1.586 ++#endif 1.587 ++ 1.588 ++swap_floppy: .ascii "Insert disk 1" 1.589 ++ .ascii "." 1.590 ++ .byte 7,13,0 1.591 1.592 # Kernel attributes; used by setup. This is part 1 of the 1.593 # header, from the old boot sector.