Z80 / Z84C Swap (Doh!)

Jules Richardson jules.richardson99 at gmail.com
Mon Aug 17 17:04:56 CDT 2015

On 08/17/2015 03:31 PM, drlegendre . wrote:
> Hey Jules,
> Ah, so your O1 also has the weird screen artifacts prior to hitting
> 'return'? Weird.. wonder what's up with that?

No, sorry! I meant the "boot error" scrolling up the screen (e.g. it's not 
the result of some kind of stuck key fault or anything).

> I've only detected activity from drive A (LH side).

As Mike mentioned, try the shift-quote trick and see if the other drive 
behaves differently.

> It definitely does
> spin, the LED lights up, but I haven't been able to detect any head
> movement. You mention that the head on yours steps back & forth
> (indefinitely?)  with no disk present - does it behave any differently when
> the drive door is open vs. closed?

It's the same whether the door is open or closed. Probably indefinite - I 
got bored after a couple of minutes of listening to drive heads crunching :-)

> In any case, one of us needs to find boot media..

Aha - I have it now... *somewhere*. I just didn't have any about a year ago 
when I stopped goofing around with the system that you now have. 
Unfortunately I don't immediately know where my CP/M disks are; Wordstar 
and the xdiags disk were in one of the little cubby areas below the drives, 
so I'm not sure why I didn't leave the CP/M disks there, too.

IIRC I got mine from images on Dave Dunfield's site and wrote them on a PC 
(but you'll need a PC with a controller capable of writing FM density). My 
todo list is about nine miles long right now, but I can probably rustle you 
a set of disks eventually if nobody else gets there first!



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