From
http://www.microchip.com/1000/pline/tools/picmicro/icds/mplabicd/index.htm

      MPLAB. ICD Firmware Upgrade for PIC16F87xA Devices
        A special version of firmware is available that allows the MPLAB ICD
to debug and program the PIC16F877A/876A/874A/873A devices. Download the
v2.40.01 firmware below and load as the new OS into your MPLAB ICD. MPLAB
IDE will not show the PIC16F87xA devices in the device selection pulldown,
but if a PIC16F87xA device is detected by MPLAB ICD and the corresponding
PIC16F87x device is selected, then the firmware will automatically adjust
for the PIC16F87xA device.

      In summary: To develop for the PIC16F876A, for instance, download and
update the MPLAB ICD with the v2.40.01 firmware, then select the PIC16F876
device from the MPLAB IDE dialog. To go back to development/programming of
the PIC16F876, simply reset the MPLAB ICD and it will sense that a PIC16F876
is the target device and re-adjust appropriately.

      For continuing, ongoing support, MPLAB ICD 2, which runs under MPLAB
IDE v6.xx, is recommended.

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