Issue upgrading A1200 to 3.1 ROMS

SuperPlay · 06 January 2018, 15:56

Hi Folks

I have tried to upgrade the ROMs in my rev 2B Amiga 1200 from 3.0 to 3.1 using these:

https://www.ebay.co.uk/itm/New-Licen...53.m2749.l2649

As stock the Amiga has 42Pin sockets with 40pin 3.0 ROMs, all works fine

With the new 3.1 ROMs installed

When the power is turned on the Amiga beeps once after five/six seconds and then the display is blank

When the 3.0 ROMs are re-installed, all is good again.

I have checked that the pins are in the sockets and are seated firm.

Any ideas?

Cheers

idrougge · 06 January 2018, 17:30

So the new Cloanto ROMs are 42-pin ones? That's a bit silly.

alexh · 06 January 2018, 17:58

Quote:

Originally Posted by idrougge

That's a bit silly.

Why? They are probably 1MiB and so need the extra address pins

I'd suggest fitting a HDD and see if that worked. KS3.1 may have a longer IDE spin up time.

Swap the two chips in case they were mislabeled

supaduper · 06 January 2018, 18:01

Send the roms back, it aint the first time bad roms have been dispatched..been there had that

idrougge · 06 January 2018, 18:27

Quote:

Originally Posted by alexh

Why? They are probably 1MiB and so need the extra address pins

But the kickstart is still only 256 kB per chip, so they would need to burn the kickstart four times for it to work.

alexh · 06 January 2018, 19:16

Not true. It could be one 256KiB image per chip and the rest could be zero

Chucky · 06 January 2018, 19:33

the A1200 per default supports 1MB rom aswell..

SuperPlay · 07 January 2018, 12:10

I have orded a ROM set from a different supplier, I will let you know how I get on :-)

Mrz · 07 January 2018, 22:29

why you want to upgrade to 3.1 roms in your A1200?
there is no advantage, are not needed for any OS , or program or game

Chucky · 07 January 2018, 22:36

3.0 is buggy crap.. it doesn't even disable the PCMCIA when needed..
and it have this thing of not "autoconfigure" memory on some turbocards etc.

so it is the first thing I toss out when I fixed a dead motherboard I have repaired.

Kin Hell · 08 January 2018, 01:05

Maybe they labelled them the wrong way round?

Would swapping them over destroy the rest of the Amiga?

I would doubt it.

Chucky · 08 January 2018, 10:48

Swapping them around will only give randomdata so the cpu simply crashe with illegal instruction the first thing it does. so it will not damage anything. just put in roms with proper code and all is just ok.
(the same thing happens without roms aswell)

SuperPlay · 13 January 2018, 13:07

I tried swapping around the ROMS without success. I have sourced a 40pin set of 3.1 ROMs and these work fine.

I would like to add that the seller of the 42 pin ROM set did try to assist with the issue and has offered a refund, so a credit goes to the seller for their customer service :-)

Kin Hell · 30 January 2018, 14:13

Quote:

Originally Posted by SuperPlay

I tried swapping around the ROMS without success. I have sourced a 40pin set of 3.1 ROMs and these work fine.

I would like to add that the seller of the 42 pin ROM set did try to assist with the issue and has offered a refund, so a credit goes to the seller for their customer service :-)

That's nice

06 January 2018, 15:56	#1
SuperPlay Registered User Join Date: Sep 2013 Location: Staffordshire / UK Posts: 119	Issue upgrading A1200 to 3.1 ROMS Hi Folks I have tried to upgrade the ROMs in my rev 2B Amiga 1200 from 3.0 to 3.1 using these: https://www.ebay.co.uk/itm/New-Licen...53.m2749.l2649 As stock the Amiga has 42Pin sockets with 40pin 3.0 ROMs, all works fine With the new 3.1 ROMs installed When the power is turned on the Amiga beeps once after five/six seconds and then the display is blank When the 3.0 ROMs are re-installed, all is good again. I have checked that the pins are in the sockets and are seated firm. Any ideas? Cheers Last edited by SuperPlay; 06 January 2018 at 16:07.

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06 January 2018, 17:30	#2
idrougge Registered User Join Date: Sep 2007 Location: Stockholm Posts: 4,332	So the new Cloanto ROMs are 42-pin ones? That's a bit silly.

06 January 2018, 18:01	#4
supaduper Registered User Join Date: Oct 2012 Location: Krypton Posts: 1,210	Send the roms back, it aint the first time bad roms have been dispatched..been there had that

06 January 2018, 19:16	#6
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,332	Not true. It could be one 256KiB image per chip and the rest could be zero

06 January 2018, 19:33	#7
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	the A1200 per default supports 1MB rom aswell..

07 January 2018, 12:10	#8
SuperPlay Registered User Join Date: Sep 2013 Location: Staffordshire / UK Posts: 119	I have orded a ROM set from a different supplier, I will let you know how I get on :-)

07 January 2018, 22:29	#9
Mrz Banned Join Date: Dec 2016 Location: I Posts: 338	why you want to upgrade to 3.1 roms in your A1200? there is no advantage, are not needed for any OS , or program or game

07 January 2018, 22:36	#10
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	3.0 is buggy crap.. it doesn't even disable the PCMCIA when needed.. and it have this thing of not "autoconfigure" memory on some turbocards etc. so it is the first thing I toss out when I fixed a dead motherboard I have repaired.

08 January 2018, 01:05	#11
Kin Hell 0ld0r Git Join Date: Mar 2009 Location: Cornwall, UK Posts: 1,570	Maybe they labelled them the wrong way round? Would swapping them over destroy the rest of the Amiga? I would doubt it.

08 January 2018, 10:48	#12
Chucky Registered User Join Date: Mar 2015 Location: Karlstad / Sweden Age: 52 Posts: 1,210	Swapping them around will only give randomdata so the cpu simply crashe with illegal instruction the first thing it does. so it will not damage anything. just put in roms with proper code and all is just ok. (the same thing happens without roms aswell)

13 January 2018, 13:07	#13
SuperPlay Registered User Join Date: Sep 2013 Location: Staffordshire / UK Posts: 119	I tried swapping around the ROMS without success. I have sourced a 40pin set of 3.1 ROMs and these work fine. I would like to add that the seller of the 42 pin ROM set did try to assist with the issue and has offered a refund, so a credit goes to the seller for their customer service :-)

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