Re: Unknown 1541 add-on card

From: Gerrit Heitsch <>
Date: Sat, 22 Jun 2013 16:17:04 +0200
Message-ID: <>
On 06/22/2013 04:01 PM, Julian Perry wrote:
> What makes you sure it's ACTUALLY specifically for a 1541?

The one mentioned here? That I don't know, but I DO know that there is a 
floppy speeder named 'TurboTrans 3.0' for the 1541 which also contained 
256 oder 512KB RAM to keep one or two whole disks in RAM.

Here's a picture of the PCB:

The PCB looks a bit different from the one in the original Post, but if 
you look closer, the logic ICs look awfully familiar. So it might be a 
redesign or just a copy.

Had to dig out my old 64'er Floppy Special Edition for this. :)


> Saturday, June 22, 2013, 11:44:40 PM, you wrote:
>> On 06/22/2013 03:40 PM, Michał Pleban wrote:
>>> wrote:
>>>> I have found a 1541 add-on card with 512 KB DRAM on board. The
>>>> problem: I have no idea who is the manufacturer. So I made some
>>>> pictures:
>>> 512kB for a 1541? o_O
>> 256KB make sense and were sold, this way you could cache a whole disk in
>> RAM and get (back then) extreme speed over a parallel cable. No more
>> waiting for head movements.
>>    Gerrit

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Received on 2013-06-22 15:01:17

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