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46 lines
1.4 KiB
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46 lines
1.4 KiB
Plaintext
4.3 Interrupt Listing
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The LockIT Pro has an augmented MSP430 CPU with a callgate at address
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0x10 causing a software interrupt. The interrupts are described below.
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INT 0x00.
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The putchar interrupt: sends a single byte to the display.
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Takes one argument with the character to print.
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INT 0x01.
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The getchar interrupt: reads a single byte of buffered input.
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Takes no arguments.
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INT 0x02.
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The gets interrupt: read a specific number of bytes to standard input.
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Takes two arguments. The first is the address to place the string, the
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second is the maximum number of bytes to read. Null bytes are not handled
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specially null-terminated.
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INT 0x10.
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Turn on DEP: pages are either executable or writable but never both.
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Takes no arguments.
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INT 0x11.
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Mark as a page as either only executable or only writable.
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Takes two one arguments. The first argument is the page number, the
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second argument is 1 if writable, 0 if executable.
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INT 0x20.
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The rand interrupt: request a random 16-bit number.
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Takes no arguments.
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INT 0x7D.
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Interface with the HSM-1. Set a flag in memory if the password passed in is
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correct.
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Takes two arguments. The first argument is the password to test, the
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second is the location of a flag to overwrite if the password is correct.
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INT 0x7E.
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Interface with the HSM-2. Trigger the deadbolt unlock if the password is
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correct.
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Takes one argument: the password to test.
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INT 0x7F.
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Interface with deadbolt to trigger an unlock if the password is correct.
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Takes no arguments.
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