You need both.
BL0010101 is the bootloader for the ICD2 and communicates
with MPLab.
MPLAB will load BL18Cx01 if that device is chosen
as target, or some other, appropriate to the chosen target.
R

Josh Koffman wrote:
> Hi all. I whipped up an ICD2 clone (described here
> http://home.t-online.de/home/520054661375/stolz.de.be/icd/main.html).
> Now I'm ready to load the firmware into the 16f876, but I'm not sure
> if I use BL18CX01.hex or BL010101.hex (in the MPLAB\ICD2 directory of
> MPLAB 7).
> 
> Thanks!
> 
> Josh
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