Re: FD5500

Date: Sat, 4 Jun 2016 23:08:21 +0200
Message-Id: <>
> On 2016-06-04, at 18:50, Gerrit Heitsch <> wrote:
> On 06/03/2016 02:10 PM, wrote:
>> I stumbled recently across a - kind of - interesting drive:
>> Admittedly I haven't seen one before. The quality of manufacturing is surprisingly good. It reports "CBM DOS V2.6 1541" although as says ;-) it surely isn't CBM DOS as found in 1541.
> It might be just a copy...

My script says "88.67% copy" so it's quite close but not enough to say that just the copyright texts were changed.

> The Oceanic 168 I have use the same ROM as the 1541-II, it just doesn't have a MOS-Logo on it. I use an original 1541-II ROM in one of them now.

I'll try that.

> The OC168 doesn't use the gate array, it's all TTL, very likely the same circuit or a derivative from the one used on the 1541 with the long board.

I am not sure if I have the oldest 1541 in an accessible place but AFAIR it was noticeably more complicated than the board in this "FD5500" drive.

I wonder about the analogue circuitry for example.


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