RE: ROM Dump of Amiga Keyboard controller

From: Martin Hoffmann-Vetter <>
Date: Fri, 22 Aug 2014 14:40:58 +0200
Message-ID: <003d01cfbe06$5380e0b0$>
Hello Jim,
>> If a 6571R6PD (with part number 315107-01) is labeled with a sticker
>> as 6571-036 with the part number 328191-02, so it must be
>> interchangeable. If the 6570 is mask programmable, does the 6571
>> real programmable after production? Is the part number 315107-01 for
>> an empty 6571?

> Anything is possible, I suppose, but I didn't know that MOS had EPROM
> technology implementations, which would have been the main way to do
> this in the 80's

Yes, it's the great question about the technology. But i don't think about EPROM technology. The 6530 was mask programmable. So every chip with changed rom need a new mask. This is only usable for huge counts of chips. So the Amiga 500 with the 6570-036 is a good candidate for a mask programming. If you want a small batch of 6570, this is bad. (For later maked floppy drives, they don't designed new 6530.) But if you have a chip where you can blow some fuses to program, it's the solution. Is this the 6571?

Or was only the dimension of the die changed? The 6571 is produced as dip and plcc. If you can't bond the 6570 into plcc, they changed the die to bond them into dip and plcc.


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Received on 2014-08-22 13:00:03

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