Re: DD2 & 3

On 2013-06-18, at 14:22, Julian Perry wrote:

> Hello Silverdr,
> 
> We are not worthy :):):)
> Awesome work!!.
> As you know I've been banging on about DolphinDOS for a while, and
> your work just takes the biscuit - I'm quite elated, actually at what
> you've achieved.

Thank you Julian but - C'mon - the only creative part on my side are the PCBs. The rest is what made William Henry rich - going through things somebody else created.. ;-)

>> I mostly completed both DolphinDOS 2 and 3 remake pages:
> 
>> http://e4aws.silverdr.com/hard_projects/dolphindos2/
>> http://e4aws.silverdr.com/hard_projects/dolphindos3/
> 
>> Would be grateful for proofreading/comments/additions/corrections.
> 
> The schematic on the dolphinDOS3 page is not clickable.

Oops! Fixed now - thanks!

> I might be in touch re: one of those DD2 boards, actually :D

:-)

> Jim Drew raised the issue that the 1541 board timing had a problem
> with fast SRAM, and that 120ns was about the fastest that worked
> without corruptions.
> ( http://www.lemon64.com/forum/viewtopic.php?t=41396 )

I don't have time to check now. I'll look at it later.

> Did you encounter any such problems whilst working with the
> DolphinDOS??

I shall check the thread later and while we know that Jim's opinions have often to be taken with proverbial grain of salt, I can't exclude that he encountered something we don't know about. I haven't noticed any problem but all the xx64 SRAM chips I have are either -15 or -12 rated.

> (I see you've posted on OCAU, too!)

Yes, to the thread by "callan" ;-) as this was the one, which eventually made me "move my butt", gather all the info together and publish it, rather than continue to sit on scattered bits and pieces until the end of my time ;-)

-- 
SD!
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