bootloader

问题 What is the order int 13h with ah=02h will read 19 sectors starting at (C, H, S) = (0, 0, 1) provided a (floppy) disk geometry of 2 heads, 18 sectors per track and 80 tracks per side. Or, more generally, what happens when it reaches the end of track 0, head 0? Does it go to track 1 or head 1? Does it even work properly in this case? EDIT: Wait.. is this actually like hours, minutes, seconds? If we reach the end of the track (S is greater than 18), then H is increased? 回答1: Modern BIOSes

问题 I recently wrote an x86 'bootloader' program that shows the values of the hardware registers after the BIOS jumps to my program. For the purpose of testing, I set the AX register to a known value to ensure that the program runs correctly. BITS 16 %macro pad 1-2 0 times %1 - ($ - $$) db %2 %endmacro [org 0x7C00] CLD ; clear direction flag (forward direction) CLI ; clear interrupt flag (disable interrupts, opposite of 65xx) MOV [0x8000], AX ; display all registers, MOV [0x8004], BX ; including

来源： https://stackoverflow.com/questions/63704833/im-making-a-bootloader-but

来源： https://stackoverflow.com/questions/61072003/assembly-printing-outputs-unexpected-result-just-an-s

来源： https://stackoverflow.com/questions/57730592/error-reading-disk-when-disk-is-not-a-hard-drive-int-0x13-ah-0x02

来源： https://stackoverflow.com/questions/43359327/default-registers-and-segments-value-on-booting-x86-machine

来源： https://stackoverflow.com/questions/63313022/masm-how-to-resolve-error-immediate-operand-not-allowed

问题 Finally the sparkfun board edge boards arrived today ;-) Following this well written guide : https://codelabs.developers.google.com/codelabs/sparkfun-tensorflow/#3 i am stuck with the following NoResponseError when trying to flash the code on the Ambiq, with the uart_wired_update.py script, that comes with tensorflow examples opprud$ python3 tensorflow/lite/experimental/micro/tools/make/downloads/AmbiqSuite-Rel2.0.0/tools/apollo3_scripts/uart_wired_update.py -b 115200 /dev/cu.usbserial-1430

问题 I wrote a little bootloader in assembly and it uses BIOS interrupts and it works great on my pc. My question is, is there any possibility to make it work on Mac / Apple systems. I know that Apple doesn't use BIOS in that sense and that they are locking lot of things down. However it is possible to use a live ubuntu stick on mac, so might it be possible to run an assembly program from startup on a mac? If yes, do you know any starting points or references of what has been done before? Thanks a

问题 The old versions show am335x_boneblack_defconfig(branch v2017.01 instead of the master) file inside the directory but I am not able to see it in the newer version.So which branch should I use to build U-Boot for BeagleBone Black? Under boards/ti/am335x/, I saw that am335x_* can be used for BeagleBone Black. Any help will be appreciated? 回答1: I think you can use configs/am335x_evm_defconfig - see line 36: CONFIG_OF_LIST="am335x-evm am335x-bone am335x-boneblack am335x-evmsk am335x-bonegreen