Re: 1541 to 2031 adapter (was no subject)

Hi,

I have not done this mod but I'm wondering which version of 1541 did you use? Is it possible that the "patched" rom is for a different rom pair? I can't see any reference to which is the correct part# for the ROM that doesn't require changing. Did you use the ROM from the MASHUP site or did you run the patch routine on your existing ROM?

Steve



>________________________________
> From: Giovi <stravaccato68@yahoo.it>
>To: cbm-hackers@musoftware.de 
>Sent: Thursday, September 19, 2013 3:42:38 PM
>Subject: 
>  
>
>Hi folks!
>
>my name is Giovi (Giovanni Verrua), italian, C= collector, I live in Brazil 
>and I'm new to this list.
>As Ruud Baltissen (that should receive this post, if I'm right...hi Ruud!) 
>already discovered, I'm not an hardware expert; dummy should be most the 
>correct word :) so I apologize if my further posts will be silly in some 
>way. I also apologize if I will do some mistakes posting to this mailing 
>list. Don't be shy, correct me whenever is needed!
>
>My first question to this list is about the 1541 drive modified for the 
>IEEE-488 interface (in other words, about connecting a 1541 to a PET), this 
>one:
>http://www.zimmers.net/anonftp/pub/cbm/documents/projects/ieee-488/index.html
>also described at this page: 
>http://vintagemashups.net/2010/12/commodore-1541-ieee-488-conversion/,where 
>I downloaded the patched ROM.
>
>I'm writing this post because, of course, mine doesn't work :)  - I checked 
>it twice and I haven't found (yet) the mistake. I will check it again. No 
>answer from the 1541 and no reset when the 8032-sk is switched on or off.
>
>I'm sure that:
>- the 1541 drive is ok
>- the 6522 is ok
>- the socket adapter is ok
>- the EPROM im programmed returns no difference if compared with the patched 
>rom image (so I believe it's ok too)
>- the ieee cable an connectors are ok
>- the ieee-488 port of the 8032 is ok since it works fine with the Petdisk 
>(from bitfixer.com).
>
>
>>>> The question for you: >>> I have a little doubt about the patched ROM: 
>>>> it's showing a different behavior respect the original 901229-05 ROM.
>
>- with the original ROM, as usual, the floppy starts to spin and the red 
>light comes on; after few seconds, the light and the spin motor go off in 
>the same moment. Normal behavior for this kind of drive.
>
>- with the patched ROM (with or without the ieee interface) the floppy just 
>spins for a while and then stops, while the red light stays on for a longer 
>time (and then goes off).
>
>Anybody of you C=hackers made this adapter in the past, and can tell me at 
>least if the patched ROM shows this different behavior?
>
>cheers,
>Giovi
>
>
>
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