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Closeup of an Intel 8259A IRQ chip from a PC XT.Pinout
The Intel 8259 is a programmable interrupt controller (PIC) designed for the Intel 8085 and 8086 microprocessors. The initial part was 8259, a later A suffix version was upward compatible and usable with the 8086 or 8088 processor. The 8259 combines multiple interrupt input sources into a single interrupt output to the host microprocessor, extending the interrupt levels available in a system beyond the one or two levels found on the processor chip. The 8259A was the interrupt controller for the ISA bus in the original IBM PC and IBM PC AT.
The 8259 was introduced as part of Intel's MCS 85 family in 1976. The 8259A was included in the original PC introduced in 1981 and maintained by the PC/XT when introduced in 1983. A second 8259A was added with the introduction of the PC/AT. The 8259 has coexisted with the Intel APIC Architecture since its introduction in symmetric multiprocessor PCs. Modern PCs have begun to phase out the 8259A in favor of the Intel APIC Architecture. However, while not anymore a separate chip, the 8259A interface is still provided by the Platform Controller Hub or southbridge on modern x86 motherboards.[1]
^"Intel datasheet". www.datasheetcatalog.com. Retrieved 30 April 2024.
The Intel8259 is a programmable interrupt controller (PIC) designed for the Intel 8085 and 8086 microprocessors. The initial part was 8259, a later A...
index with the format of IRQ followed by a number. For example, on the Intel8259 family of programmable interrupt controllers (PICs) there are eight interrupt...
interrupt controllers. As its name suggests, the APIC is more advanced than Intel's8259 Programmable Interrupt Controller (PIC), particularly enabling the construction...
depends on how the Programmable Interrupt Controller such as Intel8259 is programmed. While Intel documents IRQs 0-7 to be mapped to vectors 0x20-0x27, IBM...
chips by Intel: the 8284 clock generator the 8288 bus controller the 8254 programmable interval timer the 8255 parallel I/O interface the 8259 programmable...
a single Intel8259 PIC, giving eight vectorized and prioritized interrupt lines. It has four DMA channels originally provided by the Intel 8237. Three...
The Intel 8085 ("eighty-eighty-five") is an 8-bit microprocessor produced by Intel and introduced in March 1976. It is the last 8-bit microprocessor developed...
integrated an IDE controller with two 8237 DMA controllers, the 8254 PIT, and two 8259 PICs and a PCI to ISA bus bridge. It was introduced with the 430FX Triton...
KR580VM80A (Russian: КР580ВМ80А) is a Soviet microprocessor, a clone of the Intel 8080 CPU. Different versions of this CPU were manufactured beginning in...
input pin per device that needs it (minimum two). SERIRQ: Serialized Intel8259 compatible interrupt signal. One line is shared by all LPC devices and...
more interrupt outputs and more flexible priority schemas. Intel8259 – notable PIC from Intel OpenPIC and IBM MPIC Inter-processor interrupt (IPI) Interrupt...
The Intel 8080 ("eighty-eighty") is the second 8-bit microprocessor designed and manufactured by Intel. It first appeared in April 1974 and is an extended...
be set to auto-EOI at the start of the interrupt handler. Intel8259 – notable PIC from Intel Advanced Programmable Interrupt Controller (APIC) OpenPIC...
the machine. The peripheral chips included an Intel8259 PIC, an Intel 8237 DMA controller, and an Intel 8253 PIT. The PIT provides 18.2 Hz clock "ticks"...
1145/359810.359826. Nigel Tout. "The Busicom 141-PF calculator and the Intel 4004 microprocessor". Retrieved 2009-11-15. Federico Faggin, The Making...
develop the Intel 8080, released in 1974. Shima then developed several Intel peripheral chips, some used in the IBM PC, such as the 8259 interrupt controller...
bus bridge. This command is for IBM PC compatibility; if there is no Intel8259 style interrupt controller on the PCI bus, this cycle need never be used...
Some of his peripheral chips were used in the IBM PC, including the Intel8259 interrupt controller, 8255 parallel port chip, 8253 timer chip, 8257 DMA...
MS-DOS 3.05 Some European OEMs labeled this version MS-DOS 3.06 Intel (1973-01-04). "Intel microcomputers (advertisement)". Electronics. pp. 44–45. "2,048-bit...
object-code compatible with the Intel 8088, with an instruction set architecture (ISA) similar to that of the Intel 80188 with some extensions. The V20...
"Intel CEO Brian Krzanich Leaves Trump's Manufacturing Council Citing a Toxic Political Climate". Fortune. New York City: Time Inc. ISSN 0015-8259. Retrieved...
JavaScript. The emulated hardware consists of a 32-bit x86 compatible CPU, a 8259 Programmable Interrupt Controller, a 8254 Programmable Interrupt Timer, and...
OpenPIC 1.2 in their RS/6000 S70. Both of these systems also used a dual 8259 on their PCI-ISA bridges. An IBM MPIC was also used in the RS/6000 7046 Model...
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