@Mangaclub

If I remember correctly the 2.05 ROM was only released for A600. All other
models used 2.04. It was drivers for the PCMCIA that was added for that revision.

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@Amiga_3k

Pal machine , but the colorflull flickering is just gfx trash. my 32" LDC TV don't care about NTSC or Pal :)

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http://www.oldsoftware.com/kickstart.html

I found this link with some info on installing the ROM and Amiga motherboard
revision differences.

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@Samwel

hmm both where sold as A2000 roms and with the description a500 / a600 / a2000

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@Samwel

thanks yes the link i found also and tested and failed :)

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@Mangaclub

I think you should try and get hold of 2.04 ROM's instead and you'll find they work
alot better with your A2000.

Search for AmigaOS in Wikipedia and they also mention 2.05 as released for A600.

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@Samwel

well i somehow doubt that the 0.01 revison bump shall cause this cus its told that kick 3.1 also works with the amiga 2000

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@Samwel
Not sure, if that applies to the A2000 Rev. 4, but Kickstart 2.05 (37.350) worked fine in my A500 Rev. 5a ten years ago. It even gives you a virtual PCMCIA slot!

@Mangaclub
Are you sure that the ROM is wired correctly? On my 2.05 ROM the extra wire (for the additional address line) goes from Pin 1 to Pin 31, but on your ROM it looks like it goes from Pin 21 to Pin 31. Is that correct?

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@Geri

ahyes i first jumpered it from 1 to 31 then i followed another description that told i shall jumper 1 to 31 on the mainboard and 31 to 21 on the kickstart so you see the last result.

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The content of
http://www.oldsoftware.com/kickstart.html
is identical to my KS 3.1 install instructions - so you have tried the right alternative but failed (2.x and 3.x should behave identical in this respect)

Just to remove a couple of misunderstandings. A rev. 37.350 rom can be used without a problem in an a2000 and is not limited to being used in an a600. Furthermore a kickstart chip doesn't change pal/ntsc, that can be only be changed by replacing agnus iirc.

As for the ot problem, sorry, I can't help. If the wire patch doesn't work I'm out of ideas.

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@Mangaclub

Quote:

Mangaclub wrote: @Geri ahyes i first jumpered it from 1 to 31 then i followed another description that told i shall jumper 1 to 31 on the mainboard and 31 to 21 on the kickstart so you see the last result.

I think the jumper from pin 21 to pin 31 is for Kickstart 3.1 on all Amiga 2000 Rev. >= 3 (for this models you also have to connect pin 1 on the socket to pin 31 on the socket and bend up pin 31 of the ROM). Whereas the Amiga 2000 BSW only needs a connection from pin 1 to pin 31 on the 3.1 ROM.

Thus I think you should jumper pin 1 to pin 31 on your 2.05 ROM and not bend up pin 31 (resp. insert it in the socket), because I think pin 31 is connected to the additional address line needed on pin 1 (and you disconnect it, if you bend up pin 31).

Note that this comes without guarantee!

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@Geri

yep ive bend it up after the pin 1 to 31 sollution didnt worked out and the amiga started to puke gfx trash on me :) I now ordered a kickstart switcher from amigakit. Might that help

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@Mangaclub
A few questions..
Did both ROMs give a red screen without any wire fixes? (or just the non-MX branded chip?)

With the Amiga powered off and ROM removed, does a multimeter show 0 ohms between pins 21 and 31 at the socket?

Are there any traces coming away from pin1?
If there are, does one go back to A18 at the CPU (should be pin 46)

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@Samwel

If I remember correctly the 2.05 ROM was only released for A600.
Sounds right. The PCMCIA Type II and the internal 44-pin ATA interface on the A600 were controlled by the 'Gayle' custom chip. There's no Gayle chip on the A2000 ISTR. That might explain the 'RED' screen of Death! Wasn't there a special "Productivity mode" with the video gfx driver too?

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There should be no problems; I remember feeling funny when my A500 was equipped with CC device in boot menu as I installed 2.05 ROM...

@Doobrey

Quote:

Doobrey wrote: @Mangaclub A few questions.. Did both ROMs give a red screen without any wire fixes? (or just the non-MX branded chip?) With the Amiga powered off and ROM removed, does a multimeter show 0 ohms between pins 21 and 31 at the socket? Are there any traces coming away from pin1? If there are, does one go back to A18 at the CPU (should be pin 46)

Yes both gave red screen without any fixes.

The multimeter shows 1400 Ohm , if ive read it right between those 2 pins.

So far i dont know what you mean by traces but there are no extra whires soldered at the back of the board coming from the kickstart. But there are some other red wires all over the board, maybe made by the manufactor.
Well i know this A2000 got 3 owners before me (yes bad thing to deliver all disks with private date to the next owner:) so i dont know what they did on it already beside a selfmade kickstart switch from 1.2 to 1.3 wich i dont use anymore.

anyhow i uploaded a photo of the back here:

http://www.hikaru.at/amiga2000-back.jpg

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@Mangaclub

Quote:

Mangaclub wrote: Yes both gave red screen without any fixes.

Hmmm, I'd have expected the Macronix(MX) ROM not to work without any fixes.

The red screen is kinda good.. in the sense that it shows the ROM is working in 16 bit mode without any fixes. It just can't read the full ROM to calculate the correct checksum.

Quote:

The multimeter shows 1400 Ohm , if ive read it right between those 2 pins. anyhow i uploaded a photo of the back here: http://www.hikaru.at/amiga2000-back.jpg

Thanks for that, I was able to trace out where A18 actually went on your A2000.. and it does go to Pin 31 on the Kickstart socket instead of pin 1.

http://www.doobreynet.co.uk/temp/AW_A2000ROM.jpg
(Yellow = traces on bottom side, Red= traces on top side)


So I'm puzzled, applying the fix(bend up pin 31 and wire it to pin 21 to put the ROM in '16 bit output mode' , then wire pin 1 to socket of pin 31 to reroute A18 to the correct input pin) you described should work.

The only thing I can think of is that pin 1 is connected to ground even though the schematics show it as 'not connected'
If that is the case, you could try bending pin 1 up out of the socket.

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@Doobrey

Thanks for pointing that out :)

hmm i wonder if it got something todo that i just got 512 Kb of chipram ?

@cosmos

thanks for the offer but i doubt it will work anyhow :)


well, i'll wait now till the kickstart switcher arrives, wich should be that week, and keep you updated.

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