Upgrading an A500 to an A500+ tech questions - Page 2

darksun9210 · 30 April 2007, 16:17

i'll just have to go with an 8372A Agnus... most ECS games never expected more than 1Mb chip ram anyway... i hope...

Merlin · 30 April 2007, 16:21

OK, thanks all, does anyone have an 8372A Agnus spare, to trade for an 8375?

Cheers

Merlin

alexh · 30 April 2007, 17:18

Which type of 8375 is it?

If it is a 318069-10 then I think I could work something out for you.

darksun9210 · 01 May 2007, 11:36

vesalia have them for about 5 Euros, not including postage. apparently...

Merlin · 01 May 2007, 11:38

@ Alexh

The one I have is marked 390544-01, 8375 and 3691 20. I'm not sure what difference the code makes.

Merlin

alexh · 01 May 2007, 14:35

Quote:

390544-01, 8375, 3691, 20

8375 is the silicon chip number
390544 is the pinout variation
-01 is the version (-01 = PAL, -02 = NTSC)
3691 is the date code, 36 week of 1991
20 is I think the batch number

Quote:

I'm not sure what difference the code makes.

All 8375 Agnus' are not pin compatible. Which is which, and how they differ is unknown. I tried to find out several years ago.

I bought a DKB MegAChip 2Mbyte Chip-RAM expansion of ebay only to find out that it was NTSC. It had an 8375 chip on it. I had to do research to find out how to "convert" it to PAL.

alexh · 01 May 2007, 14:49

I wish I knew what the differences were between:

8375 390544-01
8375 318069-10

They are both 2Mbyte and both PAL.

Merlin · 01 May 2007, 15:12

Quote:

Originally Posted by alexh

I wish I knew what the differences were between:

8375 390544-01
8375 318069-10

They are both 2Mbyte and both PAL.

LOL, at least we are both in the same boat about some things.....

Merlin

alexh · 02 May 2007, 00:49

The reason I dont know what the differences are is because there are non.

At least not in pinout or basic operation.

The 8375 318069 would appear to be a later revision (perhaps just a cost cut or maybe a bug fix) of the earlier one.

The two chips work equally as well in an A500+ so I am told.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
A500+ Upgrading help	amiga1	support.Hardware	28	26 April 2011 03:34
some a500 price questions...	skforty	MarketPlace	1	26 August 2009 23:13
Upgrading KS/WB on an A500 - pros and cons?	AB Positive	New to Emulation or Amiga scene	5	14 May 2009 20:33
Upgrading A500+ MB to 2MB ChipRam	TheCorfiot	support.Hardware	11	07 April 2008 17:34
Upgrading A500(+)	Syko	support.Hardware	0	30 July 2003 16:48

30 April 2007, 16:17	#21
darksun9210 Because i can. Join Date: Apr 2007 Location: London Age: 46 Posts: 25	i'll just have to go with an 8372A Agnus... most ECS games never expected more than 1Mb chip ram anyway... i hope...

30 April 2007, 16:21	#22
Merlin AmiBay MegaMod Join Date: Mar 2007 Location: Manchester, UK Age: 62 Posts: 1,163	OK, thanks all, does anyone have an 8372A Agnus spare, to trade for an 8375? Cheers Merlin

30 April 2007, 17:18	#23
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,411	Which type of 8375 is it? If it is a 318069-10 then I think I could work something out for you.

01 May 2007, 11:36	#24
darksun9210 Because i can. Join Date: Apr 2007 Location: London Age: 46 Posts: 25	vesalia have them for about 5 Euros, not including postage. apparently...

01 May 2007, 11:38	#25
Merlin AmiBay MegaMod Join Date: Mar 2007 Location: Manchester, UK Age: 62 Posts: 1,163	@ Alexh The one I have is marked 390544-01, 8375 and 3691 20. I'm not sure what difference the code makes. Merlin

01 May 2007, 14:49	#27
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,411	I wish I knew what the differences were between: 8375 390544-01 8375 318069-10 They are both 2Mbyte and both PAL.

02 May 2007, 00:49	#29
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,411	The reason I dont know what the differences are is because there are non. At least not in pinout or basic operation. The 8375 318069 would appear to be a later revision (perhaps just a cost cut or maybe a bug fix) of the earlier one. The two chips work equally as well in an A500+ so I am told.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)