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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: TjLaZer on April 18, 2005, 07:48:22 AM

Title: A500 1MB Chip mod, working with card removed?
Post by: TjLaZer on April 18, 2005, 07:48:22 AM

I had always thought, that after you did the 1MB Chip RAM mod, you always had to have the 512k RAM card installed for the A500 to even work.  Since it was now looking for that extra 512k to provide for the 1MB Agnus and Chip RAM.  Well I was working on my A500 and I accidently tried to power it up with the A501 removed, and it worked!  It, of course, only had the 512k Chip RAM.  

Just thought I would post this, since I am such a retro geek.  :banana:

Title: Re: A500 1MB Chip mod, working with card removed?
Post by: koaftder on April 18, 2005, 08:07:53 AM

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Title: Re: A500 1MB Chip mod, working with card removed?
Post by: Homer on April 18, 2005, 08:18:47 AM

Koaftder,  more minimalist insight ?  Wow, you're a deep dude ! May be better find out whats happening there eh ??   :lol:

Title: Re: A500 1MB Chip mod, working with card removed?
Post by: koaftder on April 18, 2005, 08:21:59 AM

Quote

Homer wrote:
Koaftder,  more minimalist insight ?  Wow, you're a deep dude ! May be better find out whats happening there eh ??   :lol:

guess i ran out of stack space

Title: Re: A500 1MB Chip mod, working with card removed?
Post by: K7HTH on April 18, 2005, 09:01:32 AM

Hey Tj,

You may have been *collecting* Amigas since `87, but from your post it looks like you have just taken up *working* on Amigas in 2005! :lol:

Title: Re: A500 1MB Chip mod, working with card removed?
Post by: TjLaZer on April 18, 2005, 05:18:02 PM

Nope, been working on Amigas since 1987 too.  I abandoned the "console" Amiga in 1995 though. (Got myself a mil spec A2000 since I was in the Air Force, lol) I recently, for my collection, aquired the consoles.  I did the 1MB Chip mod a few months back.  I had done it originally in 1991 to my A500 back then.  Now that I think about it, that A500 did not work with the A501 removed.  I think it was a Rev 5A mobo, and this mobo is a Rev 6.  Is this the reason I wonder?