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- ROM Applications document has been consolidated into the Applications document - Martin has done a significant overhaul of the Applications document Co-Authored-By: MartinR <174514335+martinr-uk@users.noreply.github.com>
45 lines
1.2 KiB
Plaintext
45 lines
1.2 KiB
Plaintext
INTTEST
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=======
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RomWBW includes an API allowing applications to "hook" interrupts.
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The `INTTEST` utility allows you to test this functionality.
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** Syntax **
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`INTTEST`
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** Usage **
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`INTTEST` is an interactive application. At startup, it will display
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a list of the interrupt vector slots in your system along with the
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current vector address for each of them.
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It then prompts you to enter the slot number (in hex) of a vector to
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hook. After entering this, the application will watch the hooked
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vector and countdown from 0xFF to 0x00 as interrupts are noted.
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When the counter reaches 0x00, the interrupt is unhooked and the
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application terminates. The application can also be terminated by
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pressing <esc>.
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** Notes **
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If your system is running without interrupts active, the application
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will terminate immediately.
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All slots have vectors even if the corresponding interrupt is not
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doing anything. In this case, the vector is pointing to the "bad
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interrupt" handler.
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If you hook a vector that is not receiving any interrupts, the
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down-counter will not do anything.
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** Etymology* *
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The `INTTEST` command is an original product and the source code is
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provided in the RomWBW distribution.
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