Een tijdje geleden heb ik even met Dave Haynie in de chat gezeten, een vraag waarover ik diversen antwoorden op internet vond, maar eigenlijk geen 1 juiste/complete..
Het gaat over de jumper op het A4000 board, 2MB/8MB chipram:
Misschien dat iedereen het al wist ( ongetwijfeld ), maar ik wist het niet.. nu wel.. en ook duidelijk.. :)
De vraag:
Hi Dave, I know you maybe getting sick of answering questions about Amiga's.. but I have one where I found serveral different answers on the internet.. And I think you can answer it.. smile-emoticon On the Amiga 4000 Mainboard there's a jumper CHIPRAM 2MB / 8MB.. Was this implemented for the upcomming AAA chipset ? Or can it also be used for the AA chipset ? With just a short answer YES / YES of YES / NO I'd be happy! smile-emoticon
Het antwoord van de meester
Not for AAA -- way, way different packaging. While I was still fiddling with Pandora chips, aka AA, aka AGA (if you want to use marketing's name), George Robbins and Bob Raible were starting to look at an AA+. That would have meant a fully new Alice chip done in CMOS, so it would have room for a larger address register space. Doesn't work with AA as it exists. When Greg Berlin and Scott Schaeffer did the A4000 main board, they worked pretty closely from my A3000+ design, which could do that in the later revision. Not sure this made it to the other AA systems, by then the AA+ idea was pretty much not going to happen.
Het gaat over de jumper op het A4000 board, 2MB/8MB chipram:
Misschien dat iedereen het al wist ( ongetwijfeld ), maar ik wist het niet.. nu wel.. en ook duidelijk.. :)
De vraag:
Hi Dave, I know you maybe getting sick of answering questions about Amiga's.. but I have one where I found serveral different answers on the internet.. And I think you can answer it.. smile-emoticon On the Amiga 4000 Mainboard there's a jumper CHIPRAM 2MB / 8MB.. Was this implemented for the upcomming AAA chipset ? Or can it also be used for the AA chipset ? With just a short answer YES / YES of YES / NO I'd be happy! smile-emoticon
Het antwoord van de meester
Not for AAA -- way, way different packaging. While I was still fiddling with Pandora chips, aka AA, aka AGA (if you want to use marketing's name), George Robbins and Bob Raible were starting to look at an AA+. That would have meant a fully new Alice chip done in CMOS, so it would have room for a larger address register space. Doesn't work with AA as it exists. When Greg Berlin and Scott Schaeffer did the A4000 main board, they worked pretty closely from my A3000+ design, which could do that in the later revision. Not sure this made it to the other AA systems, by then the AA+ idea was pretty much not going to happen.
Comment