11/3/71 | SYS_INTR (II) |
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NAME |
intr -- set interrupt handling |
SYNOPSIS |
sys intr; arg / intr = 27. |
DESCRIPTION |
When arg is 0, interrupts (ASCII DELETE) are ignored. Whenarg is 1, interrupts cause their normal result, that is, |
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| force an exit. When arg is a location within the program,control is transferred to that location when an interrupt occurs. After an interrupt is caught, it is possible to resumeexecution by means of an rti instruction; however, great care must be exercised, since all I/O is terminatedabruptly upon an interrupt. In particular, reads of the typewriter tend to return with 0 characters read, thussimulating an end of file. |
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FILES |
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SEE_ALSO |
quit |
DIAGNOSTICS |
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BUGS |
It should be easier to resume after an interrupt, but Idon't know how to make it work. |
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OWNER |
ken, dmr |
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