Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: trip6 on January 12, 2008, 06:04:17 PM

Title: Installing a 8375 Angus into a A500 Rev6a
Post by: trip6 on January 12, 2008, 06:04:17 PM

If I am installing a 8375 Angus into a A500 Rev6a mainboard, is it a direct swap or do I have to solder\jumper anything? Any help is greatly appreciated Thanks.

Title: Re: Installing a 8375 Angus into a A500 Rev6a
Post by: meega on January 12, 2008, 06:07:27 PM

One of these?

(http://www.steakline.nl/img/Aberdeen%20Angus.jpg)

Title: Re: Installing a 8375 Angus into a A500 Rev6a
Post by: Zac67 on January 12, 2008, 06:31:48 PM

Should work right away. If it forces you to NTSC and you prefer PAL, you'll have to isolate pin 41 (remove/bend socket contact, break off Agnus pin or stick some plastic strip in between).

I assume you had 1 MB chip before, otherwise there are two jumpers to change.

Title: Re: Installing a 8375 Angus into a A500 Rev6a
Post by: fiat1100d on January 12, 2008, 06:54:38 PM

IIRC there are several 8375 pinouts depending on the amount of memory the chip can address, e.g. the 8375-10 that addresses 2 MB of memory and works on the A500+ hasn't the same pinout as the 8372A originally used on the A500.

Title: Re: Installing a 8375 Angus into a A500 Rev6a
Post by: rkauer on January 12, 2008, 07:11:16 PM

Quote

meega wrote:
One of these?

 I doubt it will fit...

 :roflmao:  :roflmao:  :roflmao:  :roflmao:  :roflmao:  :roflmao:

 Sorry, I can't resist.

Title: Re: Installing a 8375 Angus into a A500 Rev6a
Post by: alexh on January 12, 2008, 07:16:38 PM

It has to be a specific type of 8375 Agnus to work in the Rev6a motherboard.

318069-16 for PAL
318069-17 for NTSC

They are 1Mbyte Agnus chips. If you to use any other 8375 Agnus for 2Mbyte chip you'll need an extra PCB, MegAchip or MiniMega etc.