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Driver IRQRT32

IRQRT32 uses RTTarget-32's API for interrupt handling. It uses RTTarget-32's default interrupt request-to-interrupt vector mapping (IRQ 0 .. 31 map to vectors 40h to 5Fh or to vectors E0h to FBh under RTVmf-32) and supports 32 IRQs.

Since RTTarget-32 supports running programs at CPL 0 or 3, this driver will replace any interrupt handler it finds at startup with a different privilege level than the current privilege level. This should usually not be a problem because RTTarget-32's boot code only installs dummy interrupt handlers.

Requirements: RTTarget-32 1.1 or higher, 8059A interrupt controller at address 20h, optionally second interrupt controller at A0h or APIC mode.

Interrupt Handling