Re: Transfer a 8250 diskette

From: Gerrit Heitsch <>
Date: Sun, 13 Nov 2011 21:11:49 +0100
Message-ID: <>
On 11/13/2011 08:32 PM, Spiro Trikaliotis wrote:
> * On Sat, Nov 12, 2011 at 10:01:09PM +0100 Gerrit Heitsch wrote:
>> On 11/12/2011 09:53 PM, Spiro Trikaliotis wrote:
>> If you have a 1541-II, you're safe since those only came with the
>> -03 ROMs where the bug is fixed. Otherwise don't do it.
> How do you know (w/o opening the drive) that noone replaced the ROM for
> some reason?

There is no reason to use any other ROM. The drive has no track zero 
sensor so an earlier version doesn't make any sense at all. Using an 
even earlier ROM (from the original 1541) could be done if you really 
wanted, but there are a lot of demos that have fast loaders that tend to 
break with the old 1541 so why do it? I have a few 1541-II and they all 
have the original -03 ROM. The only replacement ROM I could imagine 
would be JiffyDOS and that has the bug fixed as well.

I suppose one could write a ROM checksum routine, download it into the 
drive, execute it and have it identify the ROM used.


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Received on 2011-11-13 21:00:11

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