30972Re: [midatlanticretro] Re: Ferguson BigBoard disk help needed
- May 24, 2013On 05/24/2013 10:34 PM, Cory Smelosky wrote:
>>>> Hi Enrico! I think I didn't know you were on this list as well.Yes. Closer (but still not "close") inspection suggests that it might be a
>>>> It's good to see you here. I'm aware of your experience with the
>>>> BigBoard boards.
>>>> I myself have known about them for many years, as I wanted one very
>>>> badly when I was in my teen years, in the mid-1980s. I had an S-100
>>>> CP/M system, which was my main computer until I moved to a PDP-11, and I
>>>> wanted one of those BigBoards so I could run a BBS on it. I subscribed
>>>> to BYTE magazine and always drooled over those full-page BigBoard ads!
>>>> I never got one, but I did put together a second S-100 system, and I
>>>> did eventually bring up my BBS.
>>>> In the past several years, I started looking for a BigBoard again,
>>>> and learned that they were nowhere near as common as I thought they
>>>> were. It took me some effort (and money) to get one, but it's finally
>>>> here, and I'm very excited to get it running.
>>>> It looks like it has seen some modifications; there's a chip glued to
>>>> the bottom of the board (!) and a bit of wire snaking around. I will
>>>> try to power it up soon and see if it runs. I dug out some 8" floppy
>>>> drives (SA-801s) last night to connect to it.
>> Yes, glued to the bottom of the board dead-bug-style, with 30AWG wire
>> running around to various parts of the board.
> That's...interesting to say the least...
clock speed mod. Further supporting this guess is that all the Z80-family
components on the board are the Z80B variants, 6MHz. That'd be a pretty
expensive pointless upgrade for a board clocked at 2.5MHz! I suspect (from
the clock crystal still being 20MHz) that it's a 5MHz modification.
I'd power it up, but someone (AHEM DAN ;)) stole the power supply that'd be
perfect for it. Heck, I might power it up tonight on a bench supply.
Dave McGuire, AK4HZ
New Kensington, PA
- << Previous post in topic Next post in topic >>