Bit (g)one?

[Maarten Halmans]

A broken bridge rectifier killed several ic's in my bit one. I replaced
a couple ic's including the main µp. Another µp is used to generate
keyboard codes, this one got  smoked too. This µp is an 805118. I looked
on the internet for a data sheet but I can't find it. The schematic
tells me it's an ordinary 8051. There is no ROM or RAM connected to it
so I guess the software is stored in  ROM on the µp. Does anyone have
the source code or are there other possibilities to repair my bit one?

Thanks,

Maarten