Norman,

        When the PIC16C74 is in sleep mode, OSC1 is disabled (therefore the
internal clock).  To wake up the processor, there must be a WDT timeout, or
an external event must be provided (either a change on portb or a clock to
the other peripherals, etc.).  The A/D interrupt will not wake up the
processor.  If your were trying to use the A/D interrupt to wake up the
processor, hopefully this will shine some light on the situation.

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Rod DeMay                   |
B&B Electronics Mfg. Co.    |  email - rdemay@bb-elec.com
707 Dayton Rd               |  phone - (815) 433-5100 x220
PO Box 1040                 |  fax   - (815) 434-7094
Ottawa, IL 61350            |
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