adonis's Photos

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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So next, I wired the top right leg of RP6 with that big yellow wire you see. This gets us the right voltage (1.5V pullup) which will be given to the CPU.

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Capacitor C106, another view of.

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So next, I wired the top right leg of RP6 with that big yellow wire you see. This gets us the right voltage (1.5V pullup) which will be given to the CPU.

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You can see the board revision here

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First we dismantled the CPU. Once bare-naked I wired the top three leads off the RP6 resitor pack. This way we get power to the top two from the third one. Notice the little wire connecting the two just to the right and bottom of the little "c" symbol. Not the yellow wire..To the left of that. Here is perhaps a better shot of it. Unfortunately the yellow wire hides the "RP6" marking... but the BIG hole on the top left is where the fan attaches to....

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Whole view of the A3640 Amiga accelerator board.

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Now we ran the yellow wire towards the CPU's pin BR1#. I soldered the yellow wire with the red, and then soldered the conglomerate to pin BR1# (middle pin horizontally, and 5th from the top). Here are the close-ups.

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Now we ran the yellow wire towards the CPU's pin BR1#. I soldered the yellow wire with the red, and then soldered the conglomerate to pin BR1# (middle pin horizontally, and 5th from the top). Here are the close-ups.

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First the CPU we used initially: Celeron 266mhz 0kb Level-2 cache.

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Now we ran the yellow wire towards the CPU's pin BR1#. I soldered the yellow wire with the red, and then soldered the conglomerate to pin BR1# (middle pin horizontally, and 5th from the top). Here are the close-ups.

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Now we ran the yellow wire towards the CPU's pin BR1#. I soldered the yellow wire with the red, and then soldered the conglomerate to pin BR1# (middle pin horizontally, and 5th from the top). Here are the close-ups.

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