new find: an Intel MDS 800

[Steve Thatcher]

the very first MDS800 I worked on in 1977 was SD based and used ISIS (not 
ISIS-II). In fact, I even had the paper tape reader and punch to go with 
it. Company is long gone of course, but my memory lingers on.

When I spoke about the 8271, I was talking about the IOC board in the 
series II and was not talking about the MDS800 because it had no internal 
boards other than the bus board all the carded plugged into. The 8271 was 
not introduced until 1977 when the Series II was released. The MDS800 was 
released in 1975.

Their decision was based on available technology...

At 12:40 PM 10/30/2004, you wrote:
>At 11:48 AM 10/30/04 -0400, you wrote:
> >I thought that the SD controller board set was also bit slice (the series
>II internal was of course 8271 based).
>
>   That's possible but I've never seen a SD board set and I have 8 or nine
>complete machines and about that many more for parts plus hundreds of
>Multibus cards. I guess that anyone that paid for a board set went with the
>DD set. I don't think that  the SD set is even shown in the few catalogs
>that I have.  I wonder why Intel would use bit slice on the SD board set
>instead of an 8271?
>
>     Joe