Contents
What are the interrupt signals?
Interrupt is a signal emitted by hardware or software when a process or an event needs immediate attention. It alerts the processor to a high-priority process requiring interruption of the current working process.
What devices use interrupt?
Interrupts are commonly used to service hardware timers, transfer data to and from storage (e.g., disk I/O) and communication interfaces (e.g., UART, Ethernet), handle keyboard and mouse events, and to respond to any other time-sensitive events as required by the application system.
What process interrupts?
An interrupt is an event that alters the sequence in which the processor executes instructions. These interrupts occur when the operator selects the restart function at the console or when a restart SIGP (signal processor) instruction is received from another processor.
What is an IRQ test?
An IRQ (interrupt request) value is an assigned location where the computer can expect a particular device to interrupt it when the device sends the computer signals about its operation. For example, when a printer has finished printing, it sends an interrupt signal to the computer.
Which is the best primer for 6502 interrupts?
This primer was written to help with basic interrupt understanding and how to implement interrupts on 6502 systems, without getting into too much detail of individual hardware setups. For further reading, see the Synertek programming manual on 6502.org or at http://users.telenet.be/kim1-6502/6502/proman.html , pages 129-146.
Is there a stop instruction on the 65C02?
(Actually the 65C02 and 65816 do have a WAIt instruction to stop the processor and make it wait for an interrupt. This makes the processor able to respond to the interrupt more quickly because it will not have any instructions in progress that must be finished first. These processors also have a SToP instruction.
What are the different types of interrupt handlers?
Interrupt-Service Routines (ISRs, also called “interrupt handlers”) can range from very simple to very complex. Many things can be done with hardware prioritizing of interrupts, interrupt handling in high-level languages, and other things that have not been mentioned here.