8 Mb CHIP RAM on All Amigas

[whiteb]

The Amiga 4000 was to have the 8MB Chip capability, it has got the jumper for it, but 8MB of chip was never implemented.

Winuae has it there for.. reference .

The A4000 chip ram, uses PC style Simm, but only addresses the 2MB.

[whiteb]

A500 WAS able to handle 2MB chip.  You needed....

1) 2MB Agnus
2) Perform motherboard trace modifications

One day I'll get out the instructions for my 4MB trapdoor expansion.

[whiteb]

@leirbag
Please, please prove us all wrong by re-designing the custom chips, rewriting kickstart and extensively modifying an A4000 motherboard. When I see the board, and watch the machine boot with no startup sequence and report 8MB of chip RAM, then I will believe it is possible :roll:
moto

I cannot see that is ISNT possible, talking about Minimig, if someone was to give Dennis the specifications so he can apply them to the Agnus section of the Minimig core.

Problem being, is then you need 8MB of ram on the minimig board for Chipmem, PLUS fastram.. and I believe that Dennis (last I heard) is running low on transistors on the core for the package he is using to store the chipset on.