Super Agnus - 2MB Chip Ram

THX1138 · 20 June 2005, 19:23

I am after the PAL version of this chip for my Amiga 1500/2000.

I know that i am looking for a chip that says 8375 on it and the part
number has to end in 10 or 1 for PAL

I have the NTSC version which came with DKB Megachip board,i bought
from the USA......which i assume is no good for a PAL system !

I have seen a chip on Ebay,but the guy says this will only work in a 500+ or 600 ?

Is this correct ?

alexh · 21 June 2005, 10:22

I think he's saying that it's from an A500+ / A600 which is correct. Those were the only machines with it in. But it is what you are after.

I think that they may have come in two or more packages... make sure you get the right one for your DKB board (if you need PLCC then get that one, if you need PDIP then that one... etc.)

Jope · 21 June 2005, 12:18

The Agnus itself can work in both modes.. It's just the matter of tying a certain leg high or low.

Only the pre-ECS Agnuses (only 512kB CHIP RAM) are built to a certain video standard. (here PAL/NTSC means refresh rate and screen res, not colour encoding)

THX1138 · 21 June 2005, 18:18

Thanks for the information AlexH & Jope...........

I thought as much and purchased this item which is the PLCC version.

I also bought a PLCC extrator tool as well !

T_hairy_bootson · 06 July 2008, 01:05

Quote:

Originally Posted by Jope

The Agnus itself can work in both modes.. It's just the matter of tying a certain leg high or low.

Only the pre-ECS Agnuses (only 512kB CHIP RAM) are built to a certain video standard. (here PAL/NTSC means refresh rate and screen res, not colour encoding)

Any info on how to do this? I have an NTSC megAchip I would love to use in one of my PAL machines.

alexh · 06 July 2008, 08:47

It's not true, at least not for the 8735 Agnus. They are hard-wired to either NTSC or PAL.

Look at the Agnus in your MegAChip and report the part number back and I'll tell you what the PAL equivalent is if you want to get one and swap.

T_hairy_bootson · 06 July 2008, 10:02

318069-11
8375
4592 20VBB

Shame, no idea where to track down a PAL 8375 from.

edit found this on evilbay

alexh · 06 July 2008, 12:06

I would recommend getting an 8375 318069-10

Although I have no evidence, I think that the 390544-01 could have a different pinout and not be compatible in your MegAchip

TheCorfiot · 06 July 2008, 12:29

Alex is right

Unlike the 8372 which could be switched between PAL / NTSC

The 8375 came in PAL or NTSC versions and as we have seen from Zetro's similar thread, Pinout compatibility is not assured.

TC

20 June 2005, 19:23	#1
THX1138 Amiga Centurai Join Date: Nov 2002 Location: UK Posts: 526	Super Agnus - 2MB Chip Ram I am after the PAL version of this chip for my Amiga 1500/2000. I know that i am looking for a chip that says 8375 on it and the part number has to end in 10 or 1 for PAL I have the NTSC version which came with DKB Megachip board,i bought from the USA......which i assume is no good for a PAL system ! I have seen a chip on Ebay,but the guy says this will only work in a 500+ or 600 ? Is this correct ?

21 June 2005, 12:18	#3
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	The Agnus itself can work in both modes.. It's just the matter of tying a certain leg high or low. Only the pre-ECS Agnuses (only 512kB CHIP RAM) are built to a certain video standard. (here PAL/NTSC means refresh rate and screen res, not colour encoding) Last edited by Jope; 21 June 2005 at 20:23.

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21 June 2005, 10:22	#2
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,337	I think he's saying that it's from an A500+ / A600 which is correct. Those were the only machines with it in. But it is what you are after. I think that they may have come in two or more packages... make sure you get the right one for your DKB board (if you need PLCC then get that one, if you need PDIP then that one... etc.)

21 June 2005, 18:18	#4
THX1138 Amiga Centurai Join Date: Nov 2002 Location: UK Posts: 526	Thanks for the information AlexH & Jope........... I thought as much and purchased this item which is the PLCC version. I also bought a PLCC extrator tool as well !

06 July 2008, 08:47	#6
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,337	It's not true, at least not for the 8735 Agnus. They are hard-wired to either NTSC or PAL. Look at the Agnus in your MegAChip and report the part number back and I'll tell you what the PAL equivalent is if you want to get one and swap.

06 July 2008, 10:02	#7
T_hairy_bootson Workbitch 1.3 Join Date: Oct 2001 Location: Melbourne, Australia Age: 46 Posts: 2,084	318069-11 8375 4592 20VBB Shame, no idea where to track down a PAL 8375 from. edit found this on evilbay

06 July 2008, 12:06	#8
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,337	I would recommend getting an 8375 318069-10 Although I have no evidence, I think that the 390544-01 could have a different pinout and not be compatible in your MegAchip

06 July 2008, 12:29	#9
TheCorfiot Amibay Senior Staff Join Date: Feb 2008 Location: Cardiff / Wales Posts: 1,302	Alex is right Unlike the 8372 which could be switched between PAL / NTSC The 8375 came in PAL or NTSC versions and as we have seen from Zetro's similar thread, Pinout compatibility is not assured. TC

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