exxos's Atari, Amiga & retro forum

Amazing work @Badwolf :) So glad you're making progress!

Steve wrote: 23 Sep 2021 15:34 Amazing work @Badwolf :) So glad you're making progress!

Thanks, Steve!

Unfortunately I just discovered another design boo-boo which torpedoes this batch of boards, though.

I was scratching my head as to why the full 64MB could pass the memory tests with YAARTTT, but then everything would go to custard when I tried to add AltRAM: I've inadvertently put a byte 3 line to the byte 4 port of one of the memory chips (and vice versa)! :|

Basically with D23 and D31 swapped, word and longword writes will succeed fine but byte writes to either byte 3 or byte 4 of the port will fail as it will be latching one line from the other byte instead. YAARTT only ever performs word writes, so this wasn't a problem.

Bah!

I hope I can cut these two traces and patchwire this board for continued dev, but with three patch wires on the board already, I think it's going to need a respin before I get a release version.

Damn and blast.

BW

I feel your pain there!

We need a group hug smiley. But I guess this one will just have to do.. :chairsmack:

exxos wrote: 24 Sep 2021 14:50 I feel your pain there!

We need a group hug smiley. But I guess this one will just have to do.. :chairsmack:

I thought you'd added this one :awwww: for these situations?
:wink: :lol: :roll: :hide: :fire: :fire: :fire:

JezC wrote: 24 Sep 2021 16:22

exxos wrote: 24 Sep 2021 14:50 We need a group hug smiley. But I guess this one will just have to do.. :chairsmack:

I thought you'd added this one :awwww: for these situations?

It's interesting how Chris' mind goes straight to the chair whack, ain't it? :lol:

BW

PS: here's the oopsie.

Badwolf wrote: 24 Sep 2021 16:24 It's interesting how Chris' mind goes straight to the chair whack, ain't it? :lol:

BW

Also, if you read TF's reply to my post on his general letter topic, that puts it in a totally different light! :lol:

JezC wrote: 24 Sep 2021 16:26 Also, if you read TF's reply to my post on his general letter topic, that puts it in a totally different light! :lol:

:twisted:

Badwolf wrote: 24 Sep 2021 16:29

JezC wrote: 24 Sep 2021 16:26 Also, if you read TF's reply to my post on his general letter topic, that puts it in a totally different light! :lol:

:twisted:

And then the latest response to that from @exxos :hide:

General question: does :hide: invalidate the :chairsmack: smilie?

JezC wrote: 24 Sep 2021 17:07 General question: does :hide: invalidate the :chairsmack: smilie?

Nope.. You get hit over the head with the chair your under..


:threadjacked:

OK, my shonky design confirmed.


(All these at 16MHz)

Now, how fast can we get this to go..?

BW