USR quad modems... (ontopic - really!)

[woodelf]

Roger Merchberger wrote:

> But the *boards* to stick 'em in aren't exactly easy to find, and Cloud 
> 9 (http://www.cloud9tech.com/) aren't building/shipping any more 
> hardware (including their 512K upgrade boards) until they get the 
> SuperBoard done; which might be quite a while yet.
But unless they have a web browser what do you need 512K memory for?
No wait ... a web broweser with graphics has to fit in 64k of memory.

> OK, just kidding, but - to venture into where my brain & dynamic memory 
> part understanding, the 41256 uses a particular refresh[1]
> which newer memory doesn't deal with well[2], so going *beyond* 512K is 
> problematic.[3] *If* I can figure out how to get 512K of SRAM to work in 
> a CoCo3, going *beyond* 512K might become a bit easier.
Good I can sell you 24 bit computer design good to 2 MHZ with real 12 bit
bytes ... :)