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Correction and addendum to the February 1987 multi-tasking article on IM2 interrupts on the TS2068. Clarifies SCLD chip behavior (places 255 on the bus during interrupts), reducing the needed interrupt table to 2 bytes. Also recommends disabling BIT 6 of port 255 during IM2 initialization, adding NOPs, and ending interrupt service routines with RETI rather than JP.