Date   : Sat, 21 Mar 2009 12:13:26 +0000
From   : afra@... (Phill Harvey-Smith)
Subject: Flash card without custom ROM?

Kris Adcock wrote:
> I suppose you could make a drop-in circuit that pretended to be an 8271 
> (so: replace the 8271 with a board that pretends to talk to a floppy 
> drive, and just use data on an SD card instead) but then you might as 
> well just replace the DFS with something that reads from the userport 
> (like mmbeeb) or do it how GoMMC does it.

That's probably true with the 8271, however, a drop in circuit that 
emulated the WD177x chips would have use for more than just the Acorn 
machines, as there are a lot of machines that use 177x chips, even more 
if you count things like the WD279x and WD179x chips also which are 
mostly software compatible.

Cheers.

Phill.

-- 
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !

"You can twist perceptions, but reality won't budge" -- Rush.