Amiga 500 mod to Amiga 500+ - Page 2

tassel · 09 April 2015, 16:38

Nice

What kind of goodies are inside that beauty? .... HDMI output... What more?

kipper2k · 09 April 2015, 16:39

Quote:

Originally Posted by tassel

Nice

What kind of goodies are inside that beauty? .... HDMI output... What more?

not long now

danko · 27 July 2015, 08:08

This mod is possible to motherboard REV 5 and 6A?

Jope · 27 July 2015, 22:10

It is possible, but it's a lot more work. The A500+ Agnus is not pin compatible with the old motherboards.

27 December 2015, 10:19

Quote:

Originally Posted by kipper2k

Baby needed a new home so i made it one

click for supersized

and the back view...

click for supersized

I haven't screwed it down yet, it needs at least 7 days to cure

This looks quite interesting! Can you provide more details on the modifications you have done to this Amiga? I am modding my A500 Rev. 8a with additional chipram and HxC Gotek + LCD Screen. The possibility to use HDMI would awesome

kipper2k · 29 December 2015, 03:00

Quote:

Originally Posted by skel2raw

This looks quite interesting! Can you provide more details on the modifications you have done to this Amiga? I am modding my A500 Rev. 8a with additional chipram and HxC Gotek + LCD Screen. The possibility to use HDMI would awesome

hi,

i have done this so it is ready for the HDMI output of the Vampire 500 that will be released soon. more details later

dirkies · 29 December 2015, 07:11

Vampire 500... so not just a version for A600... now you got my attention!

amig060 · 08 January 2016, 00:38

im waiting for the vampire 1200 umm yummy.

04 April 2018, 01:37

Any one know where I can get the parts for this mod? I would prefer components that have been tested if at all possible. I've got an 8a that is screaming at me to upgrade

. Having parts that are pretested will save me a lot of pain if I need to troubleshoot!

jediknight · 17 April 2018, 02:06

case looks ace well done.

amiga1260 · 11 July 2018, 22:00

I want my Rev.8A board only to add 512 KB from Ram expansion to 1 MB Chip.

Do I need to remove the two blobs from U32?

Spunkworks · 29 October 2018, 15:24

The d-rams and u32 and preferably also the circuitry to restore the clock?

Omolungo · 02 April 2019, 22:52

Hi,
I tried this mod with a rev. 8A.1 but I have some issue when installing a trapdoor ram expansion.

No problem at all with a same mod to a rev. 8A.

Are there some differences between rev. 8A and rev. 8A.1?

jbilander · 10 April 2019, 17:45

Quote:

Originally Posted by Omolungo

Hi,
I tried this mod with a rev. 8A.1 but I have some issue when installing a trapdoor ram expansion.

No problem at all with a same mod to a rev. 8A.

Are there some differences between rev. 8A and rev. 8A.1?

I don't think so in terms of doing this mod, but yes there are some small differences between rev 8A and rev 8A.1. Denise (OCS vs ECS) might be different and maybe Fat Agnus 8375 390544-01,02 vs 8375 318069-10,11. Also I've read there were some small changes in the clock charging circuit but I'm not certain of that, others can fill me in...

Did you manage to get the mod working with your rev 8A.1 now? What Fat Agnus chip do you have in that board?

Omolungo · 11 May 2019, 17:30

Yes, it was Gary that was defective and gave the issue: problem solved substituting it

jbilander · 07 September 2019, 21:13

If it helps anyone else...I did this mod using ultra-flat sockets for the RAM chips and they clear the keyboard nicely. This board is a keeper for me

Some pictures below:

acerRI · 18 September 2019, 15:46

I have tried to do this modification but it does not work.
MB is A500+ rev 8A1, Fat agnus is 390544-01 8375.
RAM chips are Siemens HYB514256B-70 installed on motherboard.

I bought same chips but no luck, done everything as described on this thread, just flashing screen.

What can cause this problem?

For now i reverted back to original state and amiga is working.

jbilander · 20 September 2019, 11:35

What color is the screen? Link below might help you out a bit in troubleshooting. If it's green then probably has something to do with the RAM chips you added. Try install a diagrom and troubleshoot further.

http://wiki.classicamiga.com/Amiga_b...r_code_colours

acerRI · 20 September 2019, 15:49

Thanks, will try to done mod again and then use diagrom to check.

acerRI · 27 December 2019, 19:54

Just retried this mod again and i am getting green screen, which is ram fault.
I have ordered these chips from Aliexpress, so it can be that are chips are bad.

But ordered many times ram chips for C64/128 friom Aliexpress and never had issues.

Is there anything else that can cause this error? Also tried to replace logic chip with new one but same error.

27 July 2015, 08:08	#23
danko Registered User Join Date: Oct 2009 Location: Italy Age: 45 Posts: 196	This mod is possible to motherboard REV 5 and 6A? Last edited by danko; 27 July 2015 at 08:16.

04 April 2018, 01:37	#29
a500guy Posts: n/a	Parts Please Any one know where I can get the parts for this mod? I would prefer components that have been tested if at all possible. I've got an 8a that is screaming at me to upgrade . Having parts that are pretested will save me a lot of pain if I need to troubleshoot!

29 October 2018, 15:24	#32
Spunkworks Registered User Join Date: Oct 2018 Location: netherlands Posts: 18	Anyone who can sell me The d-rams and u32 and preferably also the circuitry to restore the clock?

07 September 2019, 21:13	#36
jbilander Registered User Join Date: Jun 2018 Location: Stockholm Age: 48 Posts: 264	If it helps anyone else...I did this mod using ultra-flat sockets for the RAM chips and they clear the keyboard nicely. This board is a keeper for me Some pictures below: Attached Thumbnails

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09 April 2015, 16:38	#21
tassel Tassel / LaBaN Join Date: Feb 2014 Location: Kristiansand / Norway Posts: 42	Nice What kind of goodies are inside that beauty? .... HDMI output... What more?

27 July 2015, 22:10	#24
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	It is possible, but it's a lot more work. The A500+ Agnus is not pin compatible with the old motherboards.

29 December 2015, 07:11	#27
dirkies Zone Friend Join Date: Aug 2002 Location: Belgium Age: 51 Posts: 1,296	Vampire 500... so not just a version for A600... now you got my attention!

08 January 2016, 00:38	#28
amig060 Banned Join Date: Jan 2016 Location: salisbury Posts: 14	im waiting for the vampire 1200 umm yummy.

17 April 2018, 02:06	#30
jediknight Registered User Join Date: Feb 2016 Location: bolton Posts: 145	case looks ace well done.

11 July 2018, 22:00	#31
amiga1260 Registered User Join Date: Aug 2013 Location: Gennep/The Netherlands Posts: 66	I want my Rev.8A board only to add 512 KB from Ram expansion to 1 MB Chip. Do I need to remove the two blobs from U32?

02 April 2019, 22:52	#33
Omolungo Registered User Join Date: Nov 2009 Location: Livorno, Italy Posts: 398	Hi, I tried this mod with a rev. 8A.1 but I have some issue when installing a trapdoor ram expansion. No problem at all with a same mod to a rev. 8A. Are there some differences between rev. 8A and rev. 8A.1?

11 May 2019, 17:30	#35
Omolungo Registered User Join Date: Nov 2009 Location: Livorno, Italy Posts: 398	Yes, it was Gary that was defective and gave the issue: problem solved substituting it

18 September 2019, 15:46	#37
acerRI Registered User Join Date: Sep 2019 Location: Rijeka, Croatia Posts: 11	I have tried to do this modification but it does not work. MB is A500+ rev 8A1, Fat agnus is 390544-01 8375. RAM chips are Siemens HYB514256B-70 installed on motherboard. I bought same chips but no luck, done everything as described on this thread, just flashing screen. What can cause this problem? For now i reverted back to original state and amiga is working.

20 September 2019, 11:35	#38
jbilander Registered User Join Date: Jun 2018 Location: Stockholm Age: 48 Posts: 264	What color is the screen? Link below might help you out a bit in troubleshooting. If it's green then probably has something to do with the RAM chips you added. Try install a diagrom and troubleshoot further. http://wiki.classicamiga.com/Amiga_b...r_code_colours

20 September 2019, 15:49	#39
acerRI Registered User Join Date: Sep 2019 Location: Rijeka, Croatia Posts: 11	Thanks, will try to done mod again and then use diagrom to check.

27 December 2019, 19:54	#40
acerRI Registered User Join Date: Sep 2019 Location: Rijeka, Croatia Posts: 11	Just retried this mod again and i am getting green screen, which is ram fault. I have ordered these chips from Aliexpress, so it can be that are chips are bad. But ordered many times ram chips for C64/128 friom Aliexpress and never had issues. Is there anything else that can cause this error? Also tried to replace logic chip with new one but same error.

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