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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Xamiche on July 24, 2004, 01:38:33 PM

Title: Amiga 600 ROM chip in an Amiga 2000
Post by: Xamiche on July 24, 2004, 01:38:33 PM

Hi there Amiga fans,

I was wondering about using a ROM chip from one of my Amiga 600's in my Amiga 2000. Does anyone here know if this could cause problems. It seems to be running fine, but of course that is by no means an indicator of whether any damage is happening. I know the Amiga 600 version of the ROM has instructions for PCMCIA slot and the IDE interface, of which the Amiga 2000 has neither, but I'm hoping this wont cause any problems. Can anyone offer any advice on this?

Xamiche
 :-)

Title: Re: Amiga 600 ROM chip in an Amiga 2000
Post by: PaSha on July 24, 2004, 01:44:32 PM

Well, it won't make your A2000 blow up or cause any physical damage... And for Kickstart 3.1, it's the same chip for A500, A600 and A2000, so Kickstart 2.05 should work just fine....
So go ahead, don't be afraid.
-Paul

Title: Re: Amiga 600 ROM chip in an Amiga 2000
Post by: Xamiche on July 24, 2004, 02:06:36 PM

Hiddy ho,

Thanks for the reply. :-)
I was pretty sure it would be okay, since the 2000 has been running for a few days now without issue, but I wanted to run it by someone more knowledgable with Amiga hardware than I.

Xamiche
:-)

Title: Re: Amiga 600 ROM chip in an Amiga 2000
Post by: mikeymike on July 24, 2004, 02:13:47 PM

I thought the KS chips were only the same size for certain pairs of Amigas?

I think I've heard of the voltage pins being different on some as well, but I'm not an authority on such things.

Title: Re: Amiga 600 ROM chip in an Amiga 2000
Post by: Brian on July 24, 2004, 02:31:51 PM

I have an A500 KS1.3 on the kickswitch for my A600. Works fine but when the A600 is in 1.3mode the capslock constantly flash, this continues for a reset or two after switching it back to 2.0 again. Perhaps someone know why this is, I'm thinking PCMCIA or IDE port reporting "bad" and a capasitor sitting and holding it in that state for a while even when it's switched back?

Title: Re: Amiga 600 ROM chip in an Amiga 2000
Post by: Xamiche on July 24, 2004, 02:52:01 PM

@mikeymike

I've checked the pinouts on the A600 KS chip and the pinouts on the 2000 end and they seem to match up fine. If I can believe the pinout diagrams I Googled for. :-)
I was mostly concerned about the IDE and PCMCIA, or rather the lack of on the 2000 end, but it seems to be running well. So far.
*Crosses fingers*

Xamiche
:-)

Title: Re: Amiga 600 ROM chip in an Amiga 2000
Post by: Kronos on July 24, 2004, 03:09:46 PM

@Mikeymike

The ROMs for the 16bits are all the same (A500/600/2000/CDTV).
Some older A2000s (and maybe A500s) need a small patch to see the 2nd 256k of an 2.x/3.1-ROM and the CDTV can only take 512k-ROMs after you updated it's boot-ROMs, but the chips are still the same.

Running an 2.04-ROM in an A600 will disable IDE (and probraly PCMCIA too).

The ROMs for A1200/3000/4000/4000T are different as they may hold all possible combinations of IDE/SCSI/PCMCIA-drivers.

The ROMs for the A4000T even miss one library (supplied on disk) as it lacked some space after cramming both IDE and SCSI into it.

Title: Re: Amiga 600 ROM chip in an Amiga 2000
Post by: whabang on July 24, 2004, 04:50:38 PM

Quote

Running an 2.04-ROM in an A600 will disable IDE (and probraly PCMCIA too).

I had 2.04 in my A600, and both PCMCIA and IDE worked perfectly.

Title: Re: Amiga 600 ROM chip in an Amiga 2000
Post by: Kronos on July 24, 2004, 05:16:40 PM

@whabang

Seems there is more than 1 version of 2.04 .....

since the "normal" one doesn't have a single byte of code to support IDE :-o