DMA channels and Zorro slots

[billt]

One possibility of this is to be a Buster replacement.

http://opencores.org/project,zorro_to_wishbone_bridge

[psxphill]

Suprising that a soo much engineered computer uses that much PIO. And having a card with CPU+RAM+SCSI etc.. is essentially a computer on a card to circumvent the problem..

Zorro3 implementations just weren't quick enough, the A4000 should have been designed to drive it much faster.
 
Everything after the A3000 wasn't well engineered at all. The A4000 & A1200 embrased PIO IDE for instance.

[AmigaPixel]

AFAIK No.

It is outside the Agnus/Alice address range. The DMA masters in the Amiga chipset are AFAIK all limited to accessing Chip-RAM.

Right,I forgot you explained that in another thread. I hope I am not getting shot term memory loss!

[AmigaPixel]

@Zac67
Thanks, that explanation helps greatly! Actually all of this does.

[billt]

Hey all, I'd like to know as much as possible about Zorro3 DMA bugs in various Buster revs. Where can I find such information to learn about it?

[zipper]

For starters: http://www.wonkity.com/~wblock/a4000hard/defibust.html