Since programming a parallel port is considerably easier than controlling a serial port, using the int 17h routine is somewhat easier than using the int 14h routines. Int 17h provides three …

Jul 2, 2022 · int 14h When we trigger the interrupt, the processor goes to the 21st location in the IVT (14h = 20, indices start at 0). Since each table entry is 4 bytes (2 bytes IP, 2 bytes CS), …

INT 13h is shorthand for BIOS interrupt call 13 hex, the 20th interrupt vector in an x86 -based (IBM PC-descended) computer system. The BIOS typically sets up a real mode interrupt …

Nov 30, 2023 · For example, the instruction "int 14h" triggers interrupt 0x14. The processor then stops the current program, and jumps to the code to handle interrupt 14. When interrupt …

Apr 4, 2019 · 中断描述 int 00h cpu：除零错，或商不合法时触发 int 01h cpu：单步陷阱，tf标记为打开状态时，每条指令执行后触发 int 02h cpu：非可屏蔽中断，如引导自我测试时发生内存错 …

INT 18h traditionally jumped to an implementation of Cassette BASIC (provided by Microsoft) stored in Option ROMs. This call would typically be invoked if the BIOS was unable to identify …

Feb 16, 2013 · Int 14h supports four subfunctions- initialize, transmit a character, receive a character, and status. For all four services, the serial port number (a value in the range 0..3) is …

Sep 12, 2018 · For the AT, XT-286, and PC Convertible, the BIOS executes INT 15h, Service 90h (Device Busy), for the diskette (Type = 01h) and the fixed disk (Type = 00h) prior to waiting for …

The ROM BIOS functions of INT 14h are more efficient for accessing the serial port. This interrupt can be used to obrtain the status of the auxiliary device, which make them more flexible. 04h

pcx86 int 14h tsr INT14.ASM is a Terminate-and-Stay-Resident (TSR) utility that scans the ROM BIOS Data Area for a COM port whose I/O address is 0x2F8 (or 0x3F8 if the /1 option is …