Date   : Thu, 06 Mar 2008 12:41:22 +0000
From   : nicolagiacobbe@... (nicola giacobbe)
Subject: [SOT] RE: FPGA BBC - yah!

> ...
> Slightly OT but (IMHO) quite interesting - I had a Juno First arcade board
> with faulty a video RAM chip which suffered from partially corrupt graphics
> but was otherwise working. The PCB has a sea of 4116 DRAM chips - soldered
> into the board - and I had no easy way of determining which was at fault.
>
> I had the idea of modifying the MAME driver to simulate a faulty RAM chip! I
> tried each bit until the pattern I saw on the screen matched that in MAME. I
> then identified the chip from the schematics on the PCB, and unsoldered it
> and replaced it - I was right!!! :O
>
> ...

Very nice trick, I must keep it handy. Thanks for the suggestion.

P.S.
In case anybody is wondering: SOT is "Slightly Off Topic".
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