May 26, 2022 · The BIOS assigned INT 08H+ for their own interrupt handlers, for instance int 10H for VGA MODE switch, or int 13H for hard drive services. (Table of software-interrupt …

Jun 28, 2017 · On the way to protected or long modes, real mode code needs to provide a lot of visual feedback. Video services INT 10H provide this functionality, but lack fluidity. This …

Sep 17, 2023 · The point is, if your switches is set to MDA, it gets stored into Equipment Flag bits, and when setting a new mode with Int 10h, the Equipment Flags are checked for display type. …

mov si, HelloString lodsw mov cx,ax mov ah,0eh .repeat: lodsb int 10h loop .repeat ; .done: ret Beware that the above may not be the fastest way to loop, anymore. I once read that the more …

Jan 4, 2019 · Your code is correct; a yellow prompt means that you’re using the red/green/brown palette. However, to get the low intensity variant, you also need to call interrupt 10h service …

May 26, 2019 · INT 10h/AH=06h and INT 10h/AH=07h can be used either to scroll a rectangular region of the screen or to clear the screen to a specified foreground/background colour …

Feb 25, 2017 · bits 16 mov dl, 0 ; Cursor position column mov dh, 0 ; Cursor position row ; Draw a really simple UI ; Draws a blue background mov ah, 09h mov al, 32 mov bl, 10h mov cx, …

Oct 12, 2020 · Since the original IBM PC only supported 8 hardware interrupts, this meant that vectors 8 through 15 were used for hardware interrupts. IBM then started assigning BIOS …

Aug 4, 2021 · How does the BIOS distinguish Interrupt(08h-12h) from INT instructions, vs. actual exceptions inside the CPU? 25 How can a 32-bit x86 CPU start with reset vector 0xFFFFFFF0 …

Jun 18, 2020 · INT 10h function 14; INT 11h; INT 13h function 0, 2, 3; INT 14h function 0, 1, 2; INT 16h function 0, 1; INT 17h function 0, 1; But there are also calls to. INT 23h; INT 21h …