Overclocking A2630

desantii · 02 December 2009, 23:49

Can a 2630 be overclocked by using a faster 030 plus a new crystal? Any thoughts

thanks

rkauer · 03 December 2009, 03:51

Try it.

Worst thing it will not work. No need to replace the CPU.

MagerValp · 03 December 2009, 08:26

http://members.iinet.net.au/~davem2/...ock/a2620.html

desantii · 05 December 2009, 15:38

Very similar results to the article, just in case put in a 33mhz cpu. Tried a 33mhz crystal, no go.

Tried a 28mhz one, boot but unstable

Went back to 25mhz...

Cosmos · 12 February 2010, 13:05

Try this : http://a1k.org/a1000/

in "hardware Hacks / Eine A-2630 auf 30 MHZ Übertackten"

Cosmos · 14 February 2010, 20:14

Thanks !

I know a guy who have a 2630, but it's hard to persuade him to overclock... Don't know why... My 68030@16 is working perfectly at 40 Mhz, and absolutly not hot...

With this new GAL, 50 Mhz will be ok ?

For anyone, I'll flash for free any GAL, you only pay shipping !

Cosmos · 12 March 2010, 14:24

I try today to put the new U505 with a 330 ohm resistor on U300 (10-14) but still not working at 33 Mhz !
Infinite reset !

Ok at 28, but it's not enough...

Anyone have an idea for 33 or more ?

Cosmos · 12 March 2010, 14:26

>Try this : http://a1k.org/a1000/
>in "hardware Hacks / Eine A-2630 auf 30 MHZ Übertackten"

Not working too at 33 Mhz !

Cosmos · 12 March 2010, 14:29

Rom v7.0 on it... The last one ?

Cosmos · 12 March 2010, 14:46

arg... The U505.pld if for PCB rev 3

My A2630 is rev 9 !

How to fix for this rev 9 ?

SpeedGeek · 26 April 2011, 00:43

Hello my fellow EABer's, I finally decided to upload images of my first accelerator speed up project. This is NOT a DIY thread! But it's the perfect thread for window shoppers.

This mod or hack if you prefer is 10x more complicated than my A3640 speedup hacks... and you would have to be crazier than me just to try it! But I haven't forgotten about the window shoppers so here is a brief summary of what very many hours of hard work and stupidity can accomplish:

- 68030 + 68882 @ 54.2 MHz
- Memory timing optimized for 70 ns DRAM
- Refresh cycle time reduced 2 clocks
- 68000 state machine optimized
- DKB2632 memory timing optimized with burst support @ 54.2 MHz
- DKB2362 memory modified for NOWRAP burst support

SpeedGeek · 13 October 2020, 22:40

Quote:

Originally Posted by Kin Hell

Quote:

Originally Posted by SpeedGeek

@chiark:
I do have some pointers for this project but in order to make use of them you need a very strong technical background with logic design and excellent problem solving skills. (I'm talking about re-engineering the freakin board mate!... i.e. 100+ circuit changes)

You also need soldering and desoldering equipment, a DMM, a universal programmer for PAL modifications, schematics for the A2630 and a good parts supplier. You may also need to upgrade the A2000 motherboard to Rev 6+ and make adjustments to the A2000 power supply.

Also, since my memory has faded on this project and I don't want to be married to your upgrade project for years to come you will be sailing into uncharted waters all by yourself!

@ Thread

SpeedGeek did state on his OP that this was NOT a DIY project.

@ SG

Fully appreciate where you are coming from chap. Still a very impressive feat to say the least.

Kin

@Kin Hell:
Thanks for your support and understanding. I have decided to release an archive with the hope that everyone will realize what I have said is true and I had good reasons for advising them against this project.

To the person or party who downloads or extracts or uses the files contained in said archive.

YOU HAVE BEEN WARNED REPEATEDLY ABOUT THE USE OR MISUSE OF THE INFORMATION CONTAINED IN SAID ARCHIVE. THERE IS ABSOLUTELY NO WARRANTY OF ANY KIND EXPRESSED OR IMPLIED. ANY USE OF THE ARCHIVE OR INFORMATION FROM SAID ARCHIVE IS ENTIRELY AT YOUR OWN RISK.

NOTE: There is enough information in the attached archive to overclock an A2630 past 28 Mhz. Whats missing is schematics for the final 52 Mhz changes and DKB2632 optimizations.

In summary, "There are gaping holes in this stuff!"
Dave Haynie

DigitalKeeper · 18 October 2020, 22:07

Hi SpeedGeek!

Thx for this awesome Info's about the A2630

I would need this, coz some lack with the A2630 & A2091 with an A2000 Rev 6.2 Board -> "BUS load Problem's"

SpeedGeek · 11 November 2020, 00:13

@DigitalKeeper

I'm glad you found it useful.

@Thread

The A2630SpeedFix archive has been updated with a new U601EXP.jed because the previous one could cause a refresh timing glitch under certain conditions. However, the documentation is unchanged.

DigitalKeeper · 11 November 2020, 00:46

Please - have a look at the Archive - it has a Failure - can't depack the .jed File:

btw - my A2630 run stable at 30 MHz; more not tested yet

SpeedGeek · 11 November 2020, 02:24

Quote:

Originally Posted by DigitalKeeper

Please - have a look at the Archive - it has a Failure - can't depack the .jed File:

btw - my A2630 run stable at 30 MHz; more not tested yet

Sorry, I've uploaded it again. Hopefully, the archive is error free now.

tiim · 23 January 2021, 14:04

Thread not dead yet!!

Dammit, I am REALLY tempted to screw with mine now. Wonder if the Individual Computers BigRam will still work with this improved speed. My 2630 has 100ns RAM on board.

SpeedGeek · 23 January 2021, 15:06

Quote:

Originally Posted by tiim

Thread not dead yet!!

Dammit, I am REALLY tempted to screw with mine now. Wonder if the Individual Computers BigRam will still work with this improved speed. My 2630 has 100ns RAM on board.

http://eab.abime.net/showthread.php?t=83432&page=2

tiim · 24 January 2021, 05:40

Quote:

Originally Posted by SpeedGeek

http://eab.abime.net/showthread.php?t=83432&page=2

Thanks, SpeedGeek.

That was a nice long read, I'm thinking I'll just keep the old board and be happy with it.

02 December 2009, 23:49	#1
desantii Registered User Join Date: Oct 2009 Location: Oswego, IL Posts: 125	Overclocking A2630 Can a 2630 be overclocked by using a faster 030 plus a new crystal? Any thoughts thanks

26 April 2011, 00:43	#11
SpeedGeek Moderator Join Date: Dec 2010 Location: Wisconsin USA Age: 60 Posts: 839	A2630 @ 54.2 MHz mod! Hello my fellow EABer's, I finally decided to upload images of my first accelerator speed up project. This is NOT a DIY thread! But it's the perfect thread for window shoppers. This mod or hack if you prefer is 10x more complicated than my A3640 speedup hacks... and you would have to be crazier than me just to try it! But I haven't forgotten about the window shoppers so here is a brief summary of what very many hours of hard work and stupidity can accomplish: - 68030 + 68882 @ 54.2 MHz - Memory timing optimized for 70 ns DRAM - Refresh cycle time reduced 2 clocks - 68000 state machine optimized - DKB2632 memory timing optimized with burst support @ 54.2 MHz - DKB2362 memory modified for NOWRAP burst support Attached Thumbnails Last edited by SpeedGeek; 13 October 2020 at 22:19.

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03 December 2009, 03:51	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Try it. Worst thing it will not work. No need to replace the CPU.

03 December 2009, 08:26	#3
MagerValp Registered User Join Date: Aug 2008 Location: Göteborg / Sweden Posts: 237	http://members.iinet.net.au/~davem2/...ock/a2620.html

05 December 2009, 15:38	#4
desantii Registered User Join Date: Oct 2009 Location: Oswego, IL Posts: 125	Very similar results to the article, just in case put in a 33mhz cpu. Tried a 33mhz crystal, no go. Tried a 28mhz one, boot but unstable Went back to 25mhz...

12 February 2010, 13:05	#5
Cosmos Banned Join Date: Jan 2007 Location: France Posts: 655	Try this : http://a1k.org/a1000/ in "hardware Hacks / Eine A-2630 auf 30 MHZ Übertackten"

14 February 2010, 20:14	#6
Cosmos Banned Join Date: Jan 2007 Location: France Posts: 655	Thanks ! I know a guy who have a 2630, but it's hard to persuade him to overclock... Don't know why... My 68030@16 is working perfectly at 40 Mhz, and absolutly not hot... With this new GAL, 50 Mhz will be ok ? For anyone, I'll flash for free any GAL, you only pay shipping !

12 March 2010, 14:24	#7
Cosmos Banned Join Date: Jan 2007 Location: France Posts: 655	I try today to put the new U505 with a 330 ohm resistor on U300 (10-14) but still not working at 33 Mhz ! Infinite reset ! Ok at 28, but it's not enough... Anyone have an idea for 33 or more ?

12 March 2010, 14:26	#8
Cosmos Banned Join Date: Jan 2007 Location: France Posts: 655	>Try this : http://a1k.org/a1000/ >in "hardware Hacks / Eine A-2630 auf 30 MHZ Übertackten" Not working too at 33 Mhz !

12 March 2010, 14:29	#9
Cosmos Banned Join Date: Jan 2007 Location: France Posts: 655	Rom v7.0 on it... The last one ?

12 March 2010, 14:46	#10
Cosmos Banned Join Date: Jan 2007 Location: France Posts: 655	arg... The U505.pld if for PCB rev 3 My A2630 is rev 9 ! How to fix for this rev 9 ?

18 October 2020, 22:07	#13
DigitalKeeper _Repair_Nerd_ Join Date: Jun 2020 Location: Germany Posts: 71	Hi SpeedGeek! Thx for this awesome Info's about the A2630 I would need this, coz some lack with the A2630 & A2091 with an A2000 Rev 6.2 Board -> "BUS load Problem's"

11 November 2020, 00:13	#14
SpeedGeek Moderator Join Date: Dec 2010 Location: Wisconsin USA Age: 60 Posts: 839	@DigitalKeeper I'm glad you found it useful. @Thread The A2630SpeedFix archive has been updated with a new U601EXP.jed because the previous one could cause a refresh timing glitch under certain conditions. However, the documentation is unchanged.

11 November 2020, 00:46	#15
DigitalKeeper _Repair_Nerd_ Join Date: Jun 2020 Location: Germany Posts: 71	Please - have a look at the Archive - it has a Failure - can't depack the .jed File: btw - my A2630 run stable at 30 MHz; more not tested yet

23 January 2021, 14:04	#17
tiim Registered User Join Date: Aug 2019 Location: New Hampshire, USA Posts: 65	Thread not dead yet!! Dammit, I am REALLY tempted to screw with mine now. Wonder if the Individual Computers BigRam will still work with this improved speed. My 2630 has 100ns RAM on board.

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