Re: STD bus cards

> Date: Sat, 10 May 2008 20:50:33 -0400
> From: "Roy J. Tellason" 

> Oh,  and these aren't STD bus,  which is 56 pins rather
than 22/44.  

Yeah, I know.  My wondering was that there was an abundant
common 
source of small-profile cards that might be adapted to an
8-bit bus 
and wondering if they were still common at all.

Although there are fewer pins, I do remember mounting a
small "sub-
bus" in my MITS 8800 using these as a "cheap"
expansion for little 
peripheral projects where an S-100 card was overkill.  I
basically 
brought the 8 bits of data and 8 bits of address out with
the I/O 
port handshaking lines to a card.  Most peripherals don't
need access 
to RAM I/O space anyway.

Does anyone recall what the original application of the
22/44 cards 
was?  I suspect industrial control or maybe telco
switching.

Cheers,
Chuck

On Sunday 11 May 2008 12:08, Chuck Guzis wrote:
> > Date: Sat, 10 May 2008 20:50:33 -0400
> > From: "Roy J. Tellason"
> >
> > Oh,  and these aren't STD bus,  which is 56 pins
rather than 22/44.  
>
> Yeah, I know.  My wondering was that there was an
abundant common
> source of small-profile cards that might be adapted to
an 8-bit bus
> and wondering if they were still common at all.
>
> Although there are fewer pins, I do remember mounting a
small "sub-
> bus" in my MITS 8800 using these as a
"cheap" expansion for little
> peripheral projects where an S-100 card was overkill. 
I basically
> brought the 8 bits of data and 8 bits of address out
with the I/O
> port handshaking lines to a card.  Most peripherals
don't need access
> to RAM I/O space anyway.

I had idle thoughts of something of the sort,  but never got
the whole way 
through thinking about it...

> Does anyone recall what the original application of the
22/44 cards
> was?  I suspect industrial control or maybe telco
switching.

I didn't know there was an original application..  The gear
I had that gave me 
that cabinet was telco,  I think.

-- 
Member of the toughest, meanest, deadliest, most unrelenting
-- and
ablest -- form of life in this section of space,  a critter
that can
be killed but can't be tamed.  --Robert A. Heinlein,
"The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled
by lies. --James 
M Dakin