WebINT has a range 0 -> FFh. Before INT is executed AH usually contains a function number that identifies the subroutine. The 8086 INT instruction can be used to cause the 8086 to do any one of 256 possible interrupt types. The desired type is specified as part of the instruction. Software interrupts produced by the INT instructions have many uses. WebMar 2, 2015 · There is a way to get all the 16 colors for background, which requires turning off the "blinking attribute". Here is how it can be done: MAIN PROC FAR MOV AX, @DATA MOV DS, AX ; turn-off blinking attribute MOV AX, 1003h MOV BL, 00 INT 10h MOV AX, 0600h ;AH = 06h (scroll up window) ; black (0) MOV BH, 0Fh ;0 (black) background, F (white) text ...
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WebApr 25, 2002 · a "break" produces a 0F0H code, then the key scan code. 2. Send acknowledge to keyboard by toggling bit 7 to 1, then back to 0. 3. Put keyboard in buffer. … Webmov AL,0FH mov AX,12AEH add AL,0F1H sub AX,12AFH ∗ Range of 8-, 16-, and 32-bit unsigned numbers size range 8 bits 0 to 255 (28 − 1) 16 bits 0 to 65,535 (216 − 1) 32 bits … how many real estate agents in hampton roads
Arithmetic Flags and Instructions - PowerPoint PPT …
http://courses.ics.hawaii.edu/ReviewICS312/morea/X86NASM/ics312_nasm_data_bss.pdf Webadd AL,0F1H inc AX dec AX » All three examples result in zero result and set ZF ∗Related instructions jz jump if zero (jump if ZF = 1) jnz jump if not zero (jump if ZF = 0) 4 1998 To be used with S. Dandamudi, “Introduction to Assembly Language Programming,” Springer-Verlag, 1998. S. Dandamudi Arithmetic: Page 7 ... WebStatus Flags (cont’d) • Carry Flag ∗ Records the fact that the result of an arithmetic operation on unsigned numbers is out of range ∗ The carry flag is set in the following examples mov AL,0FH mov AX,12AEH add AL,0F1H sub AX,12AFH ∗ Range of 8-, 16-, and 32-bit unsigned numbers size range 8 bits 0 to 255 (28 − 1) 16 bits 0 to ... how deep is the ohio river at pittsburgh