Date   : Fri, 10 Nov 2006 20:56:08 +0000
From   : hideki.adam@... (adam colley)
Subject: Solidisk 1770 BBC B upgrade (first edition) Drive 1

Hihi

On 10/11/06, Greg Cook <debounce@...> wrote:
> > Hi Adam,
> >
> > Do both lights come on when you use the first drive too? If so, maybe
> > both drives are jumpered to the same drive number?

No, that's not the problem, the drives work fine in my other (8271) BBC -.-

> Perhaps the ROM's found the right floppy controller in the right place,
> but it's using the wrong protcol for the control register.  Does
> anything different happen using drives 2 and 3, or single density? Will
> it read DFS discs created on another machine?

Drives 0 and 2 work, drives 1 and 3 do not work and both access lights
(IE: on drives 0 and 1) come on when attempting to access drive 1 (or
3)

It reads and writes DFS disks fine in drive 0 (or 2) and writes double
density (&500 sectors per side) disks nicely so I'm clearly almost
there -.o

> Regarding the red headers, they're perfectly standard.  The one in IC
> 87 replaces the data separator and the other one is to supply an 8 MHz
> clock to the 1770.

Ah, I was wondering if the links were in the wrong place for the
solidisk one though, they're clearly different to the Acorn upgrade
(not adjacant pins) unless I'm reading the acorn fitting instructions
incorrectly...

if nothing else works I might consider just sticking a switch on drive
select 0 so I can disable it while using 1 but that seems like a
rather evil solution...


-- 
Hideki.Adam