Zooomr
closeup before connection to br1
closeup connection to br1
closeup connection to br1
closeup connection to br1
cpu backside
cpu frontside
our working set
rp6 closeup 1
rp6 closeup 2
Amiga 500 rev5.2

connection to b75

Uploaded on Feb 25th, 2006
by adonis
All Sizes
connection to b75
Ok. Next we flipped the CPU over, and where we attached the above wires (pin BR1#) on the other side we drilled a hole! That's right. We drilled the back side of the motherboard until we reached the CPU. Remember the above shiny silver thing (on the picture right above this text) is the REAL CPU. The whole green motherboard assembly is NOT the CPU. The CPU is soldered ontop of the motherboard. Anyhow, what this hole does is that it cuts the 2.0volt power that the motherboard feeds the CPU pin BR1#. So now BR1# is getting the 1.5volts from our hacked RP6 connection. Next thing to do was connect BR1# to the SLOT-1 pin B75 just like the P2 CPU's have it. So, we looped the wires (red now) to the backside and ran it down to where B75 is and soldered it there. Here is a close up:

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