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n. A kind of RS-232 line tester or breakout box featuring rows of blinking red and green LEDs suggestive of Christmas lights.
View Definition: RTI
/R-T-I/ interj. The mnemonic for the `return from interrupt' instruction on many computers including the 6502 and 6800. The variant `RETI' is found among former Z80 hackers (almost nobody programs these things in assembler anymore). Equivalent to "Now, where was I?" or used to end a conversational digression. See
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