SeaBIOS

seabios@seabios.org

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3802 discussions

[PATCH] vgabios: Don't default the extra vgabios stack allocation on.
by Kevin O'Connor 09 Dec '13

09 Dec '13

It's been found to break Win7. Turn it off by default for now. Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> --- vgasrc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/vgasrc/Kconfig b/vgasrc/Kconfig index b442b3e..9595e84 100644 --- a/vgasrc/Kconfig +++ b/vgasrc/Kconfig @@ -71,7 +71,7 @@ menu "VGA ROM" config VGA_ALLOCATE_EXTRA_STACK depends on BUILD_VGABIOS bool "Allocate an internal stack for 16bit interrupt entry point" - default y + default n help Attempt to allocate (via BIOS PMM call) an internal stack for the legacy 16bit 0x10 interrupt entry point. This -- 1.8.3.1

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[PATCH 2/2] floppy: Fix accesses to DOR register.
by Kevin O'Connor 09 Dec '13

09 Dec '13

The DOR register is a write-only register (even though QEMU and at least some real hardware permit read/write acess). So, do not read from the DOR port. Introduce a VARLOW variable (FloppyDOR) to store the current state. When resetting the controller, make sure to enable both the controller and interrupts. Also, make sure the controller is really reset (by writing a 0 to DOR first) to ensure an IRQ is received on reset. Also, add some additional dprintf statements to the floppy init path. Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> --- src/hw/floppy.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/src/hw/floppy.c b/src/hw/floppy.c index c5118ec..48958e6 100644 --- a/src/hw/floppy.c +++ b/src/hw/floppy.c @@ -180,10 +180,20 @@ find_floppy_type(u32 size) * Low-level floppy IO ****************************************************************/ +u8 FloppyDOR VARLOW; + +static inline void +floppy_dor_write(u8 val) +{ + outb(val, PORT_FD_DOR); + SET_LOW(FloppyDOR, val); +} + static void floppy_disable_controller(void) { - outb(inb(PORT_FD_DOR) & ~0x04, PORT_FD_DOR); + dprintf(2, "Floppy_disable_controller\n"); + floppy_dor_write(0x00); } static int @@ -276,7 +286,9 @@ floppy_pio(struct floppy_pio_s *pio) static int floppy_enable_controller(void) { - outb(inb(PORT_FD_DOR) | 0x04, PORT_FD_DOR); + dprintf(2, "Floppy_enable_controller\n"); + floppy_dor_write(0x00); + floppy_dor_write(0x0c); int ret = floppy_wait_irq(); if (ret) return ret; @@ -296,16 +308,14 @@ floppy_select_drive(u8 floppyid) SET_BDA(floppy_motor_counter, FLOPPY_MOTOR_TICKS); // Enable controller if it isn't running. - u8 dor = inb(PORT_FD_DOR); - if (!(dor & 0x04)) { + if (!(GET_LOW(FloppyDOR) & 0x04)) { int ret = floppy_enable_controller(); if (ret) return ret; } // Turn on motor of selected drive, DMA & int enabled, normal operation - dor = (floppyid ? 0x20 : 0x10) | 0x0c | floppyid; - outb(dor, PORT_FD_DOR); + floppy_dor_write((floppyid ? 0x20 : 0x10) | 0x0c | floppyid); return DISK_RET_SUCCESS; } @@ -324,6 +334,7 @@ set_diskette_current_cyl(u8 floppyid, u8 cyl) static int floppy_drive_recal(u8 floppyid) { + dprintf(2, "Floppy_drive_recal %d\n", floppyid); int ret = floppy_select_drive(floppyid); if (ret) return ret; @@ -407,6 +418,8 @@ floppy_media_sense(struct drive_s *drive_gf) break; } } + dprintf(2, "Floppy_media_sense on drive %d found rate %d\n" + , floppyid, data_rate); u8 old_data_rate = GET_BDA(floppy_media_state[floppyid]) >> 6; SET_BDA(floppy_last_data_rate, (old_data_rate<<2) | (data_rate<<6)); @@ -680,6 +693,6 @@ floppy_tick(void) SET_BDA(floppy_motor_counter, fcount); if (fcount == 0) // turn motor(s) off - outb(inb(PORT_FD_DOR) & 0xcf, PORT_FD_DOR); + floppy_dor_write(GET_LOW(FloppyDOR) & ~0xf0); } } -- 1.8.3.1

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[PATCH 1/2] floppy: Fix incorrect LBA to CHS translation.
by Kevin O'Connor 09 Dec '13

09 Dec '13

The floppy LBA to CHS translation was incorrect for the last sector of a given cylinder. This wasn't a problem under QEMU as it came to the same results anyway, but it causes errors of real floppy controllers. Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> --- src/hw/floppy.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/src/hw/floppy.c b/src/hw/floppy.c index d43b489..c5118ec 100644 --- a/src/hw/floppy.c +++ b/src/hw/floppy.c @@ -496,11 +496,10 @@ static struct chs_s lba2chs(struct disk_op_s *op) { struct chs_s res = { }; - u32 lba = op->lba; - u32 tmp = lba + 1; + u32 tmp = op->lba; u16 nls = GET_GLOBALFLAT(op->drive_gf->lchs.sector); - res.sector = tmp % nls; + res.sector = (tmp % nls) + 1; tmp /= nls; u16 nlh = GET_GLOBALFLAT(op->drive_gf->lchs.head); -- 1.8.3.1

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Re: [SeaBIOS] [coreboot] Patch number 4 for floppy in SeaBIOS
by Gelip 09 Dec '13

09 Dec '13

Maybe floppy problem is with detect low or high density. Most of the FDD does not have switch for switching between low and high density. Some FDD - especially older have a switch e.g. SAMSUNG SFD-321B/LEB (LEB series). Apparently this is one of the better FDD. Please look at this forum about LEB series that solve problems with CPCdiskXP: http://speccy.pl/forum/index.php/topic,911.msg12437.html#msg12437 http://speccy.pl/forum/index.php/topic,911.msg10808.html#msg10808 http://speccy.pl/forum/index.php/topic,911.msg10895.html#msg10895 Also please read this about FDD SAMSUNG LEB series: 'Read errors handling'

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Re: [SeaBIOS] [coreboot] Patch number 4 for floppy in SeaBIOS
by Gelip 08 Dec '13

08 Dec '13

FDD Read Errors handling "I found another 3,5 floppy drive, old .. but still reasonably in good conditions.. a SAMSUNG SFD-321B /LEB T5.. this one works like charm.. reads ALL the AMIGA disks I throw at it with no flaws.."

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Re: [SeaBIOS] [coreboot] Patch number 4 for floppy in SeaBIOS
by Gelip 08 Dec '13

08 Dec '13

OK, but where need apply patch, for dist clean or for you testing? git clone git://git.seabios.org/seabios.git seabios or to: git clone https://github.com/KevinOConnor/seabios -b testing and need edit config.h?

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Re: [SeaBIOS] [coreboot] Patch number 4 for floppy in SeaBIOS
by Gelip 08 Dec '13

08 Dec '13

This is log from other floppy BOOT-PROM disk3. Menu start OK but after select NIC driver have error: http://savepic.net/4022663.htm 11.773: Booting from Floppy... 11.773: enter handle_13: 11.773: a=00000201 b=00000000 c=00000001 d=00000000 ds=0000 es=07c0 ss=df80 11.773: si=00000000 di=00000000 bp=00000000 sp=0000fa20 cs=f000 ip=cbfc f=0202 11.773: disk_op d=0x000f5610 lba=0 buf=0x00007c00 count=1 cmd=2 11.773: Floppy_drive_recal 0 11.773: Floppy_enable_controller 11.773: handle_0e 11.773: handle_0e 11.773: handle_0e 11.773: Floppy_media_sense on drive 0 found rate 0 11.773: handle_0e 11.773: Booting from 0000:7c00 11.773: enter handle_13: 11.773: a=00000000 b=00000000 c=00000000 d=00000000 ds=7c00 es=0000 ss=df80 11.773: si=00000000 di=00000000 bp=00000000 sp=0000fa20 cs=0000 ip=7cc0 f=0202 11.773: disk_op d=0x000f5610 lba=514 buf=0x0000f879 count=0 cmd=0 11.773: Floppy_disable_controller 11.773: Floppy_enable_controller 11.773: handle_0e 11.773: enter handle_13: 11.773: a=00000800 b=00000000 c=00000000 d=00000000 ds=7c00 es=0000 ss=df80 11.773: si=00000000 di=00000000 bp=00000000 sp=0000fa20 cs=0000 ip=7cc8 f=0202 11.773: enter handle_13: 11.773: a=00000204 b=00000000 c=00000001 d=00000000 ds=7c00 es=5000 ss=df80 11.773: si=00000000 di=000057b0 bp=00000000 sp=0000fa20 cs=0000 ip=7cde f=0202 11.773: disk_op d=0x000f5610 lba=0 buf=0x00050000 count=4 cmd=2 11.773: Floppy_drive_recal 0 11.773: handle_0e 11.773: handle_0e 11.773: Floppy_media_sense on drive 0 found rate 0 11.773: handle_0e 20.867: i8042_command cmd=ae 20.867: i8042_wait_write 20.867: enter handle_13: 20.867: a=00000201 b=00000000 c=00001c01 d=00000000 ds=5000 es=6000 ss=df80 20.867: si=00000000 di=000057b0 bp=0000001e sp=0000fa20 cs=5000 ip=0188 f=0246 20.867: disk_op d=0x000f5610 lba=1008 buf=0x00060000 count=1 cmd=2 20.906: i8042_command cmd=ae 20.906: i8042_wait_write 25.775: handle_0e 25.775: floppy error: 40 04 10 1c 00 01 02 25.775: invalid basic_access:96: 25.775: a=00000200 b=00000000 c=00001c01 d=00000000 ds=5000 es=6000 ss=df80 25.775: si=00000000 di=000057b0 bp=0000001e sp=0000fa20 cs=5000 ip=0188 f=0246

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Re: [SeaBIOS] [coreboot] Patch number 4 for floppy in SeaBIOS
by Gelip 08 Dec '13

08 Dec '13

08.248: Booting from Floppy... 08.248: enter handle_13: 08.248: a=00000201 b=00000000 c=00000001 d=00000000 ds=0000 es=07c0 ss=df80 08.248: si=00000000 di=00000000 bp=00000000 sp=0000fa20 cs=f000 ip=cbfc f=0202 08.252: disk_op d=0x000f5610 lba=0 buf=0x00007c00 count=1 cmd=2 08.252: Floppy_drive_recal 0 08.252: Floppy_enable_controller 08.257: handle_0e 08.257: handle_0e 08.649: handle_0e 08.649: Floppy_media_sense on drive 0 found rate 0 08.840: handle_0e 08.840: Booting from 0000:7c00 08.840: enter handle_13: 08.840: a=00000201 b=00000700 c=00000002 d=00000100 ds=0000 es=0000 ss=df80 08.840: si=00007bd2 di=00000700 bp=00007c00 sp=0000fa20 cs=0000 ip=7d6e f=0002 08.840: disk_op d=0x000f5610 lba=19 buf=0x00000700 count=1 cmd=2 09.030: handle_0e 09.030: enter handle_13: 09.030: a=00000201 b=00000700 c=00000010 d=00000100 ds=0000 es=0000 ss=df80 09.030: si=00007bd2 di=00000002 bp=00007c00 sp=0000fa20 cs=0000 ip=7d6e f=0002 09.030: disk_op d=0x000f5610 lba=33 buf=0x00000700 count=1 cmd=2 09.162: handle_0e 09.162: enter handle_13: 09.162: a=00000201 b=00000900 c=00000011 d=00000100 ds=0000 es=0000 ss=df80 09.162: si=00007bd2 di=00000002 bp=00007c00 sp=0000fa20 cs=0000 ip=7d6e f=0006 09.162: disk_op d=0x000f5610 lba=34 buf=0x00000900 count=1 cmd=2 09.349: handle_0e 09.349: enter handle_13: 09.349: a=00000201 b=00000b00 c=00000012 d=00000100 ds=0000 es=0000 ss=df80 09.349: si=00007bd2 di=00000002 bp=00007c00 sp=0000fa20 cs=0000 ip=7d6e f=0006 09.349: disk_op d=0x000f5610 lba=35 buf=0x00000b00 count=1 cmd=2 09.543: handle_0e 09.543: enter handle_13: 09.543: a=00000201 b=00000d00 c=00000101 d=00000000 ds=0000 es=0000 ss=df80 09.543: si=00007bd2 di=00000002 bp=00007c00 sp=0000fa20 cs=0000 ip=7d6e f=0002 09.543: disk_op d=0x000f5610 lba=36 buf=0x00000d00 count=1 cmd=2 09.922: handle_0e 09.922: floppy error: 40 04 10 01 00 01 02 09.922: invalid basic_access:96: 09.922: a=00000200 b=00000d00 c=00000101 d=00000000 ds=0000 es=0000 ss=df80 09.922: si=00007bd2 di=00000002 bp=00007c00 sp=0000fa20 cs=0000 ip=7d6e f=0002

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Re: [SeaBIOS] [coreboot] Patch number 4 for floppy in SeaBIOS
by Gelip 07 Dec '13

07 Dec '13

root@debian:~# cd /coreboot root@debian:/coreboot# make GEN build.h CC romstage.inc POST romstage.inc GEN generated/crt0.romstage.S CC generated/crt0.s CC generated/crt0.romstage.o CC console/console.romstage.o CC generated/bootblock.s CC generated/bootblock.o LINK cbfs/fallback/bootblock.debug OBJCOPY cbfs/fallback/bootblock.elf OBJCOPY cbfs/fallback/bootblock.bin Created CBFS image (capacity = 261160 bytes) LINK cbfs/fallback/romstage_null.debug OBJCOPY cbfs/fallback/romstage_null.elf OBJCOPY cbfs/fallback/romstage_null.bin GEN generated/romstage_xip.ld LINK cbfs/fallback/romstage_xip.debug OBJCOPY cbfs/fallback/romstage_xip.elf CBFS coreboot.pre CC lib/version.ramstage.o CC drivers/pc80/mc146818rtc.ramstage.o CC console/console.ramstage.o CC arch/x86/boot/smbios.ramstage.o CC generated/coreboot_ram.o CC cbfs/fallback/coreboot_ram.debug OBJCOPY cbfs/fallback/coreboot_ram.elf Checking out SeaBIOS revision origin/master M src/Kconfig M src/config.h Switched to branch 'master' Deleted branch coreboot (was b66456c). M src/Kconfig M src/config.h Branch coreboot set up to track remote branch master from origin. Switched to a new branch 'coreboot' CONFIG SeaBIOS origin/master Build default config # # configuration written to /coreboot/build/seabios/.config # MAKE SeaBIOS origin/master Build Kconfig config file /coreboot/build/seabios/.config:104:warning: override: reassigning to symbol COREBOOT /coreboot/build/seabios/.config:104:warning: override: COREBOOT changes choice state /coreboot/build/seabios/.config:105:warning: override: reassigning to symbol DEBUG_SERIAL /coreboot/build/seabios/.config:110:warning: override: reassigning to symbol VGAHOOKS * * Restart config... * * * Debugging * Debug level (DEBUG_LEVEL) [8] 8 Serial port debugging (DEBUG_SERIAL) [Y/n/?] y Serial port base address (DEBUG_SERIAL_PORT) [0x3f8] 0x3f8 Special IO port debugging (DEBUG_IO) [Y/n/?] y coreboot cbmem debug logging (DEBUG_COREBOOT) [Y/n/?] (NEW) y # # configuration written to /coreboot/build/seabios/.config # Compile checking /coreboot/build/seabios/out/src/misc.o Compile checking /coreboot/build/seabios/out/src/stacks.o Compile checking /coreboot/build/seabios/out/src/output.o Compile checking /coreboot/build/seabios/out/src/string.o Compile checking /coreboot/build/seabios/out/src/x86.o Compile checking /coreboot/build/seabios/out/src/block.o Compile checking /coreboot/build/seabios/out/src/cdrom.o Compile checking /coreboot/build/seabios/out/src/mouse.o Compile checking /coreboot/build/seabios/out/src/kbd.o Compile checking /coreboot/build/seabios/out/src/serial.o Compile checking /coreboot/build/seabios/out/src/clock.o Compile checking /coreboot/build/seabios/out/src/resume.o Compile checking /coreboot/build/seabios/out/src/pnpbios.o Compile checking /coreboot/build/seabios/out/src/vgahooks.o Compile checking /coreboot/build/seabios/out/src/pcibios.o Compile checking /coreboot/build/seabios/out/src/apm.o Compile checking /coreboot/build/seabios/out/src/fw/smp.o Compile checking /coreboot/build/seabios/out/src/hw/pci.o Compile checking /coreboot/build/seabios/out/src/hw/timer.o Compile checking /coreboot/build/seabios/out/src/hw/rtc.o Compile checking /coreboot/build/seabios/out/src/hw/dma.o Compile checking /coreboot/build/seabios/out/src/hw/pic.o Compile checking /coreboot/build/seabios/out/src/hw/ps2port.o Compile checking /coreboot/build/seabios/out/src/hw/serialio.o Compile checking /coreboot/build/seabios/out/src/hw/usb.o Compile checking /coreboot/build/seabios/out/src/hw/usb-uhci.o Compile checking /coreboot/build/seabios/out/src/hw/usb-ohci.o Compile checking /coreboot/build/seabios/out/src/hw/usb-ehci.o Compile checking /coreboot/build/seabios/out/src/hw/usb-xhci.o Compile checking /coreboot/build/seabios/out/src/hw/usb-hid.o Compile checking /coreboot/build/seabios/out/src/hw/usb-msc.o Compile checking /coreboot/build/seabios/out/src/hw/usb-uas.o Compile checking /coreboot/build/seabios/out/src/hw/blockcmd.o Compile checking /coreboot/build/seabios/out/src/hw/floppy.o Compile checking /coreboot/build/seabios/out/src/hw/ata.o Compile checking /coreboot/build/seabios/out/src/hw/ramdisk.o Compile checking /coreboot/build/seabios/out/src/hw/virtio-ring.o Compile checking /coreboot/build/seabios/out/src/hw/virtio-pci.o Compile checking /coreboot/build/seabios/out/src/hw/virtio-blk.o Compile checking /coreboot/build/seabios/out/src/hw/virtio-scsi.o Compile checking /coreboot/build/seabios/out/src/hw/lsi-scsi.o Compile checking /coreboot/build/seabios/out/src/hw/esp-scsi.o Compile checking /coreboot/build/seabios/out/src/hw/megasas.o Compile checking /coreboot/build/seabios/out/src/hw/pvscsi.o Compile checking /coreboot/build/seabios/out/src/post.o Compile checking /coreboot/build/seabios/out/src/memmap.o Compile checking /coreboot/build/seabios/out/src/malloc.o Compile checking /coreboot/build/seabios/out/src/pmm.o Compile checking /coreboot/build/seabios/out/src/romfile.o Compile checking /coreboot/build/seabios/out/src/optionroms.o Compile checking /coreboot/build/seabios/out/src/boot.o Compile checking /coreboot/build/seabios/out/src/bootsplash.o Compile checking /coreboot/build/seabios/out/src/jpeg.o Compile checking /coreboot/build/seabios/out/src/bmp.o Compile checking /coreboot/build/seabios/out/src/hw/ahci.o Compile checking /coreboot/build/seabios/out/src/hw/usb-hub.o Compile checking /coreboot/build/seabios/out/src/fw/coreboot.o Compile checking /coreboot/build/seabios/out/src/fw/lzmadecode.o Compile checking /coreboot/build/seabios/out/src/fw/csm.o Compile checking /coreboot/build/seabios/out/src/fw/biostables.o Compile checking /coreboot/build/seabios/out/src/fw/paravirt.o Compile checking /coreboot/build/seabios/out/src/fw/shadow.o Compile checking /coreboot/build/seabios/out/src/fw/pciinit.o Compile checking /coreboot/build/seabios/out/src/fw/smm.o Compile checking /coreboot/build/seabios/out/src/fw/mtrr.o Compile checking /coreboot/build/seabios/out/src/fw/xen.o Compile checking /coreboot/build/seabios/out/src/fw/acpi.o Compile checking /coreboot/build/seabios/out/src/fw/mptable.o Compile checking /coreboot/build/seabios/out/src/fw/pirtable.o Compile checking /coreboot/build/seabios/out/src/fw/smbios.o Compile checking /coreboot/build/seabios/out/src/fw/romfile_loader.o Compiling whole program /coreboot/build/seabios/out/ccode32flat.o Compiling whole program /coreboot/build/seabios/out/code32seg.o Compile checking /coreboot/build/seabios/out/src/system.o Compile checking /coreboot/build/seabios/out/src/disk.o Compile checking /coreboot/build/seabios/out/src/font.o Compiling whole program /coreboot/build/seabios/out/ccode16.o Building ld scripts Version: rel-1.7.3-116-gb66456c-dirty-20131207_205816-debian Fixed space: 0xe05b-0x10000 total: 8101 slack: 9 Percent slack: 0.1% 16bit size: 43076 32bit segmented size: 2852 32bit flat size: 29488 32bit flat init size: 51312 Lowmem size: 2160 f-segment var size: 1192 Linking /coreboot/build/seabios/out/rom16.o Stripping /coreboot/build/seabios/out/rom16.strip.o Linking /coreboot/build/seabios/out/rom32seg.o /coreboot/build/seabios/out/code32seg.o: In function `debug_putc': /coreboot/build/seabios/src/output.c:42: undefined reference to `qemu_debug_putc' /coreboot/build/seabios/src/output.c:45: undefined reference to `serial_debug_putc' /coreboot/build/seabios/out/code32seg.o: In function `debug_flush': /coreboot/build/seabios/src/output.c:52: undefined reference to `serial_debug_flush' make[2]: *** [/coreboot/build/seabios/out/rom32seg.o] Error 1 make[1]: *** [build] Error 2 make: *** [seabios] Error 2

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Re: [SeaBIOS] [coreboot] Patch number 4 for floppy in SeaBIOS
by Gelip 07 Dec '13

07 Dec '13

More debug: 07.544: Booting from Floppy... 07.544: enter handle_13: 07.544: a=00000201 b=00000000 c=00000001 d=00000000 ds=0000 es=07c0 ss=dd80 07.544: si=00000000 di=00000000 bp=00000000 sp=0000fac8 cs=f000 ip=c9ac f=0202 07.544: disk_op d=0x000f4510 lba=0 buf=0x00007c00 count=1 cmd=2 07.565: check_recal_drive 0 07.565: floppy_drive_recal 0 07.565: handle_0e 07.565: handle_0e 07.565: floppy_media_sense 0 ftype=4 07.565: floppy_drive_readid 0 rate=0 head=0 07.930: handle_0e 07.930: floppy_media_sense finish 0 data_rate=0 fms=17 stype=4 08.123: handle_0e 08.123: Booting from 0000:7c00 08.123: enter handle_13: 08.123: a=00000201 b=00000700 c=00000002 d=00000100 ds=0000 es=0000 ss=dd80 08.124: si=00007bd2 di=00000700 bp=00007c00 sp=0000fac8 cs=0000 ip=7d6e f=0002 08.124: disk_op d=0x000f4510 lba=19 buf=0x00000700 count=1 cmd=2 08.313: handle_0e 08.313: enter handle_13: 08.313: a=00000201 b=00000700 c=00000010 d=00000100 ds=0000 es=0000 ss=dd80 08.313: si=00007bd2 di=00000002 bp=00007c00 sp=0000fac8 cs=0000 ip=7d6e f=0002 08.315: disk_op d=0x000f4510 lba=33 buf=0x00000700 count=1 cmd=2 08.445: handle_0e 08.445: enter handle_13: 08.445: a=00000201 b=00000900 c=00000011 d=00000100 ds=0000 es=0000 ss=dd80 08.445: si=00007bd2 di=00000002 bp=00007c00 sp=0000fac8 cs=0000 ip=7d6e f=0006 08.445: disk_op d=0x000f4510 lba=34 buf=0x00000900 count=1 cmd=2 08.635: handle_0e 08.635: enter handle_13: 08.635: a=00000201 b=00000b00 c=00000012 d=00000100 ds=0000 es=0000 ss=dd80 08.635: si=00007bd2 di=00000002 bp=00007c00 sp=0000fac8 cs=0000 ip=7d6e f=0006 08.638: disk_op d=0x000f4510 lba=35 buf=0x00000b00 count=1 cmd=2 08.823: handle_0e 08.823: enter handle_13: 08.823: a=00000201 b=00000d00 c=00000101 d=00000000 ds=0000 es=0000 ss=dd80 08.823: si=00007bd2 di=00000002 bp=00007c00 sp=0000fac8 cs=0000 ip=7d6e f=0002 08.826: disk_op d=0x000f4510 lba=36 buf=0x00000d00 count=1 cmd=2 09.205: handle_0e 09.205: floppy error: 40 04 10 01 00 01 02 09.205: invalid basic_access:96: 09.206: a=00000200 b=00000d00 c=00000101 d=00000000 ds=0000 es=0000 ss=dd80 09.206: si=00007bd2 di=00000002 bp=00007c00 sp=0000fac8 cs=0000 ip=7d6e f=0002

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